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Author SHA1 Message Date
Yury Norov
47d8c15615 include: move find.h from asm_generic to linux
find_bit API and bitmap API are closely related, but inclusion paths
are different - include/asm-generic and include/linux, correspondingly.
In the past it made a lot of troubles due to circular dependencies
and/or undefined symbols. Fix this by moving find.h under include/linux.

Signed-off-by: Yury Norov <yury.norov@gmail.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
2022-01-15 08:47:31 -08:00
Aneesh Kumar K.V
21b084fdf2 mm/mempolicy: wire up syscall set_mempolicy_home_node
Link: https://lkml.kernel.org/r/20211202123810.267175-4-aneesh.kumar@linux.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Ben Widawsky <ben.widawsky@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Mike Kravetz <mike.kravetz@oracle.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Huang Ying <ying.huang@intel.com>
Cc: <linux-api@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15 16:30:30 +02:00
Pasha Tatashin
d283d422c6 x86: mm: add x86_64 support for page table check
Add page table check hooks into routines that modify user page tables.

Link: https://lkml.kernel.org/r/20211221154650.1047963-5-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Cc: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Frederic Weisbecker <frederic@kernel.org>
Cc: Greg Thelen <gthelen@google.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Jiri Slaby <jirislaby@kernel.org>
Cc: Jonathan Corbet <corbet@lwn.net>
Cc: Kees Cook <keescook@chromium.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Cc: Mike Rapoport <rppt@kernel.org>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Paul Turner <pjt@google.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Sami Tolvanen <samitolvanen@google.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Wei Xu <weixugc@google.com>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15 16:30:28 +02:00
Arnd Bergmann
36090def7b mm: move tlb_flush_pending inline helpers to mm_inline.h
linux/mm_types.h should only define structure definitions, to make it
cheap to include elsewhere.  The atomic_t helper function definitions
are particularly large, so it's better to move the helpers using those
into the existing linux/mm_inline.h and only include that where needed.

As a follow-up, we may want to go through all the indirect includes in
mm_types.h and reduce them as much as possible.

Link: https://lkml.kernel.org/r/20211207125710.2503446-2-arnd@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Suren Baghdasaryan <surenb@google.com>
Cc: Colin Cross <ccross@google.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Peter Xu <peterx@redhat.com>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Yu Zhao <yuzhao@google.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Matthew Wilcox (Oracle) <willy@infradead.org>
Cc: Eric Biederman <ebiederm@xmission.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15 16:30:27 +02:00
Qi Zheng
36ef159f44 mm: remove redundant check about FAULT_FLAG_ALLOW_RETRY bit
Since commit 4064b98270 ("mm: allow VM_FAULT_RETRY for multiple
times") allowed VM_FAULT_RETRY for multiple times, the
FAULT_FLAG_ALLOW_RETRY bit of fault_flag will not be changed in the page
fault path, so the following check is no longer needed:

	flags & FAULT_FLAG_ALLOW_RETRY

So just remove it.

[akpm@linux-foundation.org: coding style fixes]

Link: https://lkml.kernel.org/r/20211110123358.36511-1-zhengqi.arch@bytedance.com
Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: Kirill Shutemov <kirill@shutemov.name>
Cc: Peter Xu <peterx@redhat.com>
Cc: Muchun Song <songmuchun@bytedance.com>
Cc: Chengming Zhou <zhouchengming@bytedance.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15 16:30:27 +02:00
Kefeng Wang
60115fa54a mm: defer kmemleak object creation of module_alloc()
Yongqiang reports a kmemleak panic when module insmod/rmmod with KASAN
enabled(without KASAN_VMALLOC) on x86[1].

When the module area allocates memory, it's kmemleak_object is created
successfully, but the KASAN shadow memory of module allocation is not
ready, so when kmemleak scan the module's pointer, it will panic due to
no shadow memory with KASAN check.

  module_alloc
    __vmalloc_node_range
      kmemleak_vmalloc
				kmemleak_scan
				  update_checksum
    kasan_module_alloc
      kmemleak_ignore

Note, there is no problem if KASAN_VMALLOC enabled, the modules area
entire shadow memory is preallocated.  Thus, the bug only exits on ARCH
which supports dynamic allocation of module area per module load, for
now, only x86/arm64/s390 are involved.

Add a VM_DEFER_KMEMLEAK flags, defer vmalloc'ed object register of
kmemleak in module_alloc() to fix this issue.

[1] https://lore.kernel.org/all/6d41e2b9-4692-5ec4-b1cd-cbe29ae89739@huawei.com/

[wangkefeng.wang@huawei.com: fix build]
  Link: https://lkml.kernel.org/r/20211125080307.27225-1-wangkefeng.wang@huawei.com
[akpm@linux-foundation.org: simplify ifdefs, per Andrey]
  Link: https://lkml.kernel.org/r/CA+fCnZcnwJHUQq34VuRxpdoY6_XbJCDJ-jopksS5Eia4PijPzw@mail.gmail.com

Link: https://lkml.kernel.org/r/20211124142034.192078-1-wangkefeng.wang@huawei.com
Fixes: 793213a82d ("s390/kasan: dynamic shadow mem allocation for modules")
Fixes: 39d114ddc6 ("arm64: add KASAN support")
Fixes: bebf56a1b1 ("kasan: enable instrumentation of global variables")
Signed-off-by: Kefeng Wang <wangkefeng.wang@huawei.com>
Reported-by: Yongqiang Liu <liuyongqiang13@huawei.com>
Cc: Andrey Konovalov <andreyknvl@gmail.com>
Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
Cc: Heiko Carstens <hca@linux.ibm.com>
Cc: Vasily Gorbik <gor@linux.ibm.com>
Cc: Christian Borntraeger <borntraeger@linux.ibm.com>
Cc: Alexander Gordeev <agordeev@linux.ibm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Alexander Potapenko <glider@google.com>
Cc: Kefeng Wang <wangkefeng.wang@huawei.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2022-01-15 16:30:25 +02:00
Yang Zhong
c862dcd199 x86/fpu: Fix inline prefix warnings
Fix sparse warnings in xstate and remove inline prefix.

Fixes: 980fe2fddc ("x86/fpu: Extend fpu_xstate_prctl() with guest permissions")
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Reported-by: kernel test robot <lkp@intel.com>
Message-Id: <20220113180825.322333-1-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:48:38 -05:00
Kevin Tian
b5274b1b7b kvm: x86: Disable interception for IA32_XFD on demand
Always intercepting IA32_XFD causes non-negligible overhead when this
register is updated frequently in the guest.

Disable r/w emulation after intercepting the first WRMSR(IA32_XFD)
with a non-zero value.

Disable WRMSR emulation implies that IA32_XFD becomes out-of-sync
with the software states in fpstate and the per-cpu xfd cache. This
leads to two additional changes accordingly:

  - Call fpu_sync_guest_vmexit_xfd_state() after vm-exit to bring
    software states back in-sync with the MSR, before handle_exit_irqoff()
    is called.

  - Always trap #NM once write interception is disabled for IA32_XFD.
    The #NM exception is rare if the guest doesn't use dynamic
    features. Otherwise, there is at most one exception per guest
    task given a dynamic feature.

p.s. We have confirmed that SDM is being revised to say that
when setting IA32_XFD[18] the AMX register state is not guaranteed
to be preserved. This clarification avoids adding mess for a creative
guest which sets IA32_XFD[18]=1 before saving active AMX state to
its own storage.

Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-22-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:43 -05:00
Thomas Gleixner
5429cead01 x86/fpu: Provide fpu_sync_guest_vmexit_xfd_state()
KVM can disable the write emulation for the XFD MSR when the vCPU's fpstate
is already correctly sized to reduce the overhead.

When write emulation is disabled the XFD MSR state after a VMEXIT is
unknown and therefore not in sync with the software states in fpstate and
the per CPU XFD cache.

Provide fpu_sync_guest_vmexit_xfd_state() which has to be invoked after a
VMEXIT before enabling interrupts when write emulation is disabled for the
XFD MSR.

It could be invoked unconditionally even when write emulation is enabled
for the price of a pointless MSR read.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-21-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:42 -05:00
Guang Zeng
be50b2065d kvm: x86: Add support for getting/setting expanded xstate buffer
With KVM_CAP_XSAVE, userspace uses a hardcoded 4KB buffer to get/set
xstate data from/to KVM. This doesn't work when dynamic xfeatures
(e.g. AMX) are exposed to the guest as they require a larger buffer
size.

Introduce a new capability (KVM_CAP_XSAVE2). Userspace VMM gets the
required xstate buffer size via KVM_CHECK_EXTENSION(KVM_CAP_XSAVE2).
KVM_SET_XSAVE is extended to work with both legacy and new capabilities
by doing properly-sized memdup_user() based on the guest fpu container.
KVM_GET_XSAVE is kept for backward-compatible reason. Instead,
KVM_GET_XSAVE2 is introduced under KVM_CAP_XSAVE2 as the preferred
interface for getting xstate buffer (4KB or larger size) from KVM
(Link: https://lkml.org/lkml/2021/12/15/510)

Also, update the api doc with the new KVM_GET_XSAVE2 ioctl.

Signed-off-by: Guang Zeng <guang.zeng@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-19-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:41 -05:00
Thomas Gleixner
c60427dd50 x86/fpu: Add uabi_size to guest_fpu
Userspace needs to inquire KVM about the buffer size to work
with the new KVM_SET_XSAVE and KVM_GET_XSAVE2. Add the size info
to guest_fpu for KVM to access.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-18-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:40 -05:00
Jing Liu
690a757d61 kvm: x86: Add CPUID support for Intel AMX
Extend CPUID emulation to support XFD, AMX_TILE, AMX_INT8 and
AMX_BF16. Adding those bits into kvm_cpu_caps finally activates all
previous logics in this series.

Hide XFD on 32bit host kernels. Otherwise it leads to a weird situation
where KVM tells userspace to migrate MSR_IA32_XFD and then rejects
attempts to read/write the MSR.

Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-17-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:40 -05:00
Jing Liu
86aff7a479 kvm: x86: Add XCR0 support for Intel AMX
Two XCR0 bits are defined for AMX to support XSAVE mechanism. Bit 17
is for tilecfg and bit 18 is for tiledata.

The value of XCR0[17:18] is always either 00b or 11b. Also, SDM
recommends that only 64-bit operating systems enable Intel AMX by
setting XCR0[18:17]. 32-bit host kernel never sets the tile bits in
vcpu->arch.guest_supported_xcr0.

Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-16-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:39 -05:00
Jing Liu
61f208134a kvm: x86: Disable RDMSR interception of IA32_XFD_ERR
This saves one unnecessary VM-exit in guest #NM handler, given that the
MSR is already restored with the guest value before the guest is resumed.

Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-15-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:33 -05:00
Jing Liu
548e83650a kvm: x86: Emulate IA32_XFD_ERR for guest
Emulate read/write to IA32_XFD_ERR MSR.

Only the saved value in the guest_fpu container is touched in the
emulation handler. Actual MSR update is handled right before entering
the guest (with preemption disabled)

Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Zeng Guang <guang.zeng@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-14-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:26 -05:00
Jing Liu
ec5be88ab2 kvm: x86: Intercept #NM for saving IA32_XFD_ERR
Guest IA32_XFD_ERR is generally modified in two places:

  - Set by CPU when #NM is triggered;
  - Cleared by guest in its #NM handler;

Intercept #NM for the first case when a nonzero value is written
to IA32_XFD. Nonzero indicates that the guest is willing to do
dynamic fpstate expansion for certain xfeatures, thus KVM needs to
manage and virtualize guest XFD_ERR properly. The vcpu exception
bitmap is updated in XFD write emulation according to guest_fpu::xfd.

Save the current XFD_ERR value to the guest_fpu container in the #NM
VM-exit handler. This must be done with interrupt disabled, otherwise
the unsaved MSR value may be clobbered by host activity.

The saving operation is conducted conditionally only when guest_fpu:xfd
includes a non-zero value. Doing so also avoids misread on a platform
which doesn't support XFD but #NM is triggered due to L1 interception.

Queueing #NM to the guest is postponed to handle_exception_nmi(). This
goes through the nested_vmx check so a virtual vmexit is queued instead
when #NM is triggered in L2 but L1 wants to intercept it.

Restore the host value (always ZERO outside of the host #NM
handler) before enabling interrupt.

Restore the guest value from the guest_fpu container right before
entering the guest (with interrupt disabled).

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-13-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:18 -05:00
Jing Liu
1df4fd834e x86/fpu: Prepare xfd_err in struct fpu_guest
When XFD causes an instruction to generate #NM, IA32_XFD_ERR
contains information about which disabled state components are
being accessed. The #NM handler is expected to check this
information and then enable the state components by clearing
IA32_XFD for the faulting task (if having permission).

If the XFD_ERR value generated in guest is consumed/clobbered
by the host before the guest itself doing so, it may lead to
non-XFD-related #NM treated as XFD #NM in host (due to non-zero
value in XFD_ERR), or XFD-related #NM treated as non-XFD #NM in
guest (XFD_ERR cleared by the host #NM handler).

Introduce a new field in fpu_guest to save the guest xfd_err value.
KVM is expected to save guest xfd_err before interrupt is enabled
and restore it right before entering the guest (with interrupt
disabled).

Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-12-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:44:08 -05:00
Jing Liu
820a6ee944 kvm: x86: Add emulation for IA32_XFD
Intel's eXtended Feature Disable (XFD) feature allows the software
to dynamically adjust fpstate buffer size for XSAVE features which
have large state.

Because guest fpstate has been expanded for all possible dynamic
xstates at KVM_SET_CPUID2, emulation of the IA32_XFD MSR is
straightforward. For write just call fpu_update_guest_xfd() to
update the guest fpu container once all the sanity checks are passed.
For read simply return the cached value in the container.

Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Zeng Guang <guang.zeng@intel.com>
Signed-off-by: Wei Wang <wei.w.wang@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-11-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:43:29 -05:00
Kevin Tian
8eb9a48ac1 x86/fpu: Provide fpu_update_guest_xfd() for IA32_XFD emulation
Guest XFD can be updated either in the emulation path or in the
restore path.

Provide a wrapper to update guest_fpu::fpstate::xfd. If the guest
fpstate is currently in-use, also update the per-cpu xfd cache and
the actual MSR.

Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-10-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:43:22 -05:00
Jing Liu
5ab2f45bba kvm: x86: Enable dynamic xfeatures at KVM_SET_CPUID2
KVM can request fpstate expansion in two approaches:

  1) When intercepting guest updates to XCR0 and XFD MSR;

  2) Before vcpu runs (e.g. at KVM_SET_CPUID2);

The first option doesn't waste memory for legacy guest if it doesn't
support XFD. However doing so introduces more complexity and also
imposes an order requirement in the restoring path, i.e. XCR0/XFD
must be restored before XSTATE.

Given that the agreement is to do the static approach. This is
considered a better tradeoff though it does waste 8K memory for
legacy guest if its CPUID includes dynamically-enabled xfeatures.

Successful fpstate expansion requires userspace VMM to acquire
guest xstate permissions before calling KVM_SET_CPUID2.

Also take the chance to adjust the indent in kvm_set_cpuid().

Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-9-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:43:21 -05:00
Sean Christopherson
0781d60f65 x86/fpu: Provide fpu_enable_guest_xfd_features() for KVM
Provide a wrapper for expanding the guest fpstate buffer according
to requested xfeatures. KVM wants to call this wrapper to manage
any dynamic xstate used by the guest.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20220105123532.12586-8-yang.zhong@intel.com>
[Remove unnecessary 32-bit check. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:43:21 -05:00
Thomas Gleixner
c270ce393d x86/fpu: Add guest support to xfd_enable_feature()
Guest support for dynamically enabled FPU features requires a few
modifications to the enablement function which is currently invoked from
the #NM handler:

  1) Use guest permissions and sizes for the update

  2) Update fpu_guest state accordingly

  3) Take into account that the enabling can be triggered either from a
     running guest via XSETBV and MSR_IA32_XFD write emulation or from
     a guest restore. In the latter case the guests fpstate is not the
     current tasks active fpstate.

Split the function and implement the guest mechanics throughout the
callchain.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-7-yang.zhong@intel.com>
[Add 32-bit stub for __xfd_enable_feature. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:43:11 -05:00
Jing Liu
b0237dad2d x86/fpu: Make XFD initialization in __fpstate_reset() a function argument
vCPU threads are different from native tasks regarding to the initial XFD
value. While all native tasks follow a fixed value (init_fpstate::xfd)
established by the FPU core at boot, vCPU threads need to obey the reset
value (i.e. ZERO) defined by the specification, to meet the expectation of
the guest.

Let the caller supply an argument and adjust the host and guest related
invocations accordingly.

Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jing Liu <jing2.liu@intel.com>
Signed-off-by: Yang Zhong <yang.zhong@intel.com>
Message-Id: <20220105123532.12586-6-yang.zhong@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2022-01-14 13:40:57 -05:00
Masahiro Yamada
7ce7e984ab kbuild: rename cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22}
GZIP-compressed files end with 4 byte data that represents the size
of the original input. The decompressors (the self-extracting kernel)
exploit it to know the vmlinux size beforehand. To mimic the GZIP's
trailer, Kbuild provides cmd_{bzip2,lzma,lzo,lz4,xzkern,zstd22}.
Unfortunately these macros are used everywhere despite the appended
size data is only useful for the decompressors.

There is no guarantee that such hand-crafted trailers are safely ignored.
In fact, the kernel refuses compressed initramdfs with the garbage data.
That is why usr/Makefile overrides size_append to make it no-op.

To limit the use of such broken compressed files, this commit renames
the existing macros as follows:

  cmd_bzip2   --> cmd_bzip2_with_size
  cmd_lzma    --> cmd_lzma_with_size
  cmd_lzo     --> cmd_lzo_with_size
  cmd_lz4     --> cmd_lz4_with_size
  cmd_xzkern  --> cmd_xzkern_with_size
  cmd_zstd22  --> cmd_zstd22_with_size

To keep the decompressors working, I updated the following Makefiles
accordingly:

  arch/arm/boot/compressed/Makefile
  arch/h8300/boot/compressed/Makefile
  arch/mips/boot/compressed/Makefile
  arch/parisc/boot/compressed/Makefile
  arch/s390/boot/compressed/Makefile
  arch/sh/boot/compressed/Makefile
  arch/x86/boot/compressed/Makefile

I reused the current macro names for the normal usecases; they produce
the compressed data in the proper format.

I did not touch the following:

  arch/arc/boot/Makefile
  arch/arm64/boot/Makefile
  arch/csky/boot/Makefile
  arch/mips/boot/Makefile
  arch/riscv/boot/Makefile
  arch/sh/boot/Makefile
  kernel/Makefile

This means those Makefiles will stop appending the size data.

I dropped the 'override size_append' hack from usr/Makefile.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Reviewed-by: Nicolas Schier <n.schier@avm.de>
2022-01-14 02:54:05 +09:00
Linus Torvalds
feb7a43de5 Rework of the MSI interrupt infrastructure:
Treewide cleanup and consolidation of MSI interrupt handling in
   preparation for further changes in this area which are necessary to:
 
   - address existing shortcomings in the VFIO area
 
   - support the upcoming Interrupt Message Store functionality which
     decouples the message store from the PCI config/MMIO space
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Merge tag 'irq-msi-2022-01-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull MSI irq updates from Thomas Gleixner:
 "Rework of the MSI interrupt infrastructure.

  This is a treewide cleanup and consolidation of MSI interrupt handling
  in preparation for further changes in this area which are necessary
  to:

   - address existing shortcomings in the VFIO area

   - support the upcoming Interrupt Message Store functionality which
     decouples the message store from the PCI config/MMIO space"

* tag 'irq-msi-2022-01-13' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (94 commits)
  genirq/msi: Populate sysfs entry only once
  PCI/MSI: Unbreak pci_irq_get_affinity()
  genirq/msi: Convert storage to xarray
  genirq/msi: Simplify sysfs handling
  genirq/msi: Add abuse prevention comment to msi header
  genirq/msi: Mop up old interfaces
  genirq/msi: Convert to new functions
  genirq/msi: Make interrupt allocation less convoluted
  platform-msi: Simplify platform device MSI code
  platform-msi: Let core code handle MSI descriptors
  bus: fsl-mc-msi: Simplify MSI descriptor handling
  soc: ti: ti_sci_inta_msi: Remove ti_sci_inta_msi_domain_free_irqs()
  soc: ti: ti_sci_inta_msi: Rework MSI descriptor allocation
  NTB/msi: Convert to msi_on_each_desc()
  PCI: hv: Rework MSI handling
  powerpc/mpic_u3msi: Use msi_for_each-desc()
  powerpc/fsl_msi: Use msi_for_each_desc()
  powerpc/pasemi/msi: Convert to msi_on_each_dec()
  powerpc/cell/axon_msi: Convert to msi_on_each_desc()
  powerpc/4xx/hsta: Rework MSI handling
  ...
2022-01-13 09:05:29 -08:00
Bjorn Helgaas
6553ff3dd9 Merge branch 'pci/host/hv'
- Add hv-internal interfaces to encapsulate arch IRQ dependencies (Sunil
  Muthuswamy)

- Add arm64 Hyper-V vPCI support (Sunil Muthuswamy)

* pci/host/hv:
  PCI: hv: Add arm64 Hyper-V vPCI support
  PCI: hv: Make the code arch neutral by adding arch specific interfaces
2022-01-13 09:57:47 -06:00
Linus Torvalds
ce990f1de0 xen: branch for v5.17-rc1
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Merge tag 'for-linus-5.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip

Pull xen updates from Juergen Gross:

 - a fix for the Xen gntdev driver

 - a fix for running as Xen dom0 booted via EFI and the EFI framebuffer
   being located above 4GB

 - a series for support of mapping other guest's memory by using zone
   device when running as Xen guest on Arm

* tag 'for-linus-5.17-rc1-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  dt-bindings: xen: Clarify "reg" purpose
  arm/xen: Read extended regions from DT and init Xen resource
  xen/unpopulated-alloc: Add mechanism to use Xen resource
  xen/balloon: Bring alloc(free)_xenballooned_pages helpers back
  arm/xen: Switch to use gnttab_setup_auto_xlat_frames() for DT
  xen/unpopulated-alloc: Drop check for virt_addr_valid() in fill_list()
  xen/x86: obtain upper 32 bits of video frame buffer address for Dom0
  xen/gntdev: fix unmap notification order
2022-01-12 16:42:00 -08:00
Linus Torvalds
64ad946152 - Get rid of all the .fixup sections because this generates
misleading/wrong stacktraces and confuse RELIABLE_STACKTRACE and
 LIVEPATCH as the backtrace misses the function which is being fixed up.
 
 - Add Straight Light Speculation mitigation support which uses a new
 compiler switch -mharden-sls= which sticks an INT3 after a RET or an
 indirect branch in order to block speculation after them. Reportedly,
 CPUs do speculate behind such insns.
 
 - The usual set of cleanups and improvements
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Merge tag 'x86_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 core updates from Borislav Petkov:

 - Get rid of all the .fixup sections because this generates
   misleading/wrong stacktraces and confuse RELIABLE_STACKTRACE and
   LIVEPATCH as the backtrace misses the function which is being fixed
   up.

 - Add Straight Line Speculation mitigation support which uses a new
   compiler switch -mharden-sls= which sticks an INT3 after a RET or an
   indirect branch in order to block speculation after them. Reportedly,
   CPUs do speculate behind such insns.

 - The usual set of cleanups and improvements

* tag 'x86_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (32 commits)
  x86/entry_32: Fix segment exceptions
  objtool: Remove .fixup handling
  x86: Remove .fixup section
  x86/word-at-a-time: Remove .fixup usage
  x86/usercopy: Remove .fixup usage
  x86/usercopy_32: Simplify __copy_user_intel_nocache()
  x86/sgx: Remove .fixup usage
  x86/checksum_32: Remove .fixup usage
  x86/vmx: Remove .fixup usage
  x86/kvm: Remove .fixup usage
  x86/segment: Remove .fixup usage
  x86/fpu: Remove .fixup usage
  x86/xen: Remove .fixup usage
  x86/uaccess: Remove .fixup usage
  x86/futex: Remove .fixup usage
  x86/msr: Remove .fixup usage
  x86/extable: Extend extable functionality
  x86/entry_32: Remove .fixup usage
  x86/entry_64: Remove .fixup usage
  x86/copy_mc_64: Remove .fixup usage
  ...
2022-01-12 16:31:19 -08:00
Linus Torvalds
8e5b0adeea Peter Zijlstra says:
"Cleanup of the perf/kvm interaction."
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Merge tag 'perf_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull perf updates from Borislav Petkov:
 "Cleanup of the perf/kvm interaction."

* tag 'perf_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  perf: Drop guest callback (un)register stubs
  KVM: arm64: Drop perf.c and fold its tiny bits of code into arm.c
  KVM: arm64: Hide kvm_arm_pmu_available behind CONFIG_HW_PERF_EVENTS=y
  KVM: arm64: Convert to the generic perf callbacks
  KVM: x86: Move Intel Processor Trace interrupt handler to vmx.c
  KVM: Move x86's perf guest info callbacks to generic KVM
  KVM: x86: More precisely identify NMI from guest when handling PMI
  KVM: x86: Drop current_vcpu for kvm_running_vcpu + kvm_arch_vcpu variable
  perf/core: Use static_call to optimize perf_guest_info_callbacks
  perf: Force architectures to opt-in to guest callbacks
  perf: Add wrappers for invoking guest callbacks
  perf/core: Rework guest callbacks to prepare for static_call support
  perf: Drop dead and useless guest "support" from arm, csky, nds32 and riscv
  perf: Stop pretending that perf can handle multiple guest callbacks
  KVM: x86: Register Processor Trace interrupt hook iff PT enabled in guest
  KVM: x86: Register perf callbacks after calling vendor's hardware_setup()
  perf: Protect perf_guest_cbs with RCU
2022-01-12 16:26:58 -08:00
Peter Zijlstra
9cdbeec409 x86/entry_32: Fix segment exceptions
The LKP robot reported that commit in Fixes: caused a failure. Turns out
the ldt_gdt_32 selftest turns into an infinite loop trying to clear the
segment.

As discovered by Sean, what happens is that PARANOID_EXIT_TO_KERNEL_MODE
in the handle_exception_return path overwrites the entry stack data with
the task stack data, restoring the "bad" segment value.

Instead of having the exception retry the instruction, have it emulate
the full instruction. Replace EX_TYPE_POP_ZERO with EX_TYPE_POP_REG
which will do the equivalent of: POP %reg; MOV $imm, %reg.

In order to encode the segment registers, add them as registers 8-11 for
32-bit.

By setting regs->[defg]s the (nested) RESTORE_REGS will pop this value
at the end of the exception handler and by increasing regs->sp, it will
have skipped the stack slot.

This was debugged by Sean Christopherson <seanjc@google.com>.

 [ bp: Add EX_REG_GS too. ]

Fixes: aa93e2ad74 ("x86/entry_32: Remove .fixup usage")
Reported-by: kernel test robot <oliver.sang@intel.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/Yd1l0gInc4zRcnt/@hirez.programming.kicks-ass.net
2022-01-12 16:38:25 +01:00
Sunil Muthuswamy
831c1ae725 PCI: hv: Make the code arch neutral by adding arch specific interfaces
Encapsulate arch dependencies in Hyper-V vPCI through a set of
arch-dependent interfaces. Adding these arch specific interfaces will
allow for an implementation for other architectures, such as arm64.

There are no functional changes expected from this patch.

Link: https://lore.kernel.org/r/1641411156-31705-2-git-send-email-sunilmut@linux.microsoft.com
Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com>
Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Boqun Feng <boqun.feng@gmail.com>
Reviewed-by: Marc Zyngier <maz@kernel.org>
Reviewed-by: Michael Kelley <mikelley@microsoft.com>
2022-01-12 08:21:54 -06:00
Linus Torvalds
f18e2d8772 - Make x86 defconfigs more useful by enabling CONFIG_LOCALVERSION_AUTO
and CONFIG_KALLSYMS_ALL
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Merge tag 'x86_build_for_v5.17_rc1-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull missed x86 build updates from Borislav Petkov:
 "In the heat of the battle between me and the tip pull requests, I've
  sent you the tip:x86/build branch without the two top-most commits
  from Ingo (it appears I hadn't fast-forwarded my local branch, sorry
  about that).

  Therefore, here's a part 2 of x86/build for 5.17.

   - Make x86 defconfigs more useful by enabling
     CONFIG_LOCALVERSION_AUTO and CONFIG_KALLSYMS_ALL

  And while you merge that, I'll be at the blackboard, writing:

    I will always fast-forward local branches before tagging and sending pull requests to Linus.
    I will always fast-forward local branches before tagging and sending pull requests to Linus.
    I will always fast-forward local branches before tagging and sending pull requests..."

* tag 'x86_build_for_v5.17_rc1-p2' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/kbuild: Enable CONFIG_KALLSYMS_ALL=y in the defconfigs
  x86/defconfig: Enable CONFIG_LOCALVERSION_AUTO=y in the defconfig
2022-01-11 15:38:11 -08:00
Linus Torvalds
f12fc75ef7 EFI updates for v5.17
- support taking the measurement of the initrd when loaded via the
   LoadFile2 protocol
 - kobject API cleanup from Greg
 - some header file whitespace fixes
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Merge tag 'efi-next-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi

Pull EFI updates from Ard Biesheuvel:

 - support taking the measurement of the initrd when loaded via the
   LoadFile2 protocol

 - kobject API cleanup from Greg

 - some header file whitespace fixes

* tag 'efi-next-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/efi/efi:
  efi: use default_groups in kobj_type
  efi/libstub: measure loaded initrd info into the TPM
  efi/libstub: consolidate initrd handling across architectures
  efi/libstub: x86/mixed: increase supported argument count
  efi/libstub: add prototype of efi_tcg2_protocol::hash_log_extend_event()
  include/linux/efi.h: Remove unneeded whitespaces before tabs
2022-01-11 15:36:30 -08:00
Linus Torvalds
f692121142 This pull request contains the following changes for UML:
- set_fs removal
 - Devicetree support
 - Many cleanups from Al
 - Various virtio and build related fixes
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Merge tag 'for-linus-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml

Pull UML updates from Richard Weinberger:

 - set_fs removal

 - Devicetree support

 - Many cleanups from Al

 - Various virtio and build related fixes

* tag 'for-linus-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/uml: (31 commits)
  um: virtio_uml: Allow probing from devicetree
  um: Add devicetree support
  um: Extract load file helper from initrd.c
  um: remove set_fs
  hostfs: Fix writeback of dirty pages
  um: Use swap() to make code cleaner
  um: header debriding - sigio.h
  um: header debriding - os.h
  um: header debriding - net_*.h
  um: header debriding - mem_user.h
  um: header debriding - activate_ipi()
  um: common-offsets.h debriding...
  um, x86: bury crypto_tfm_ctx_offset
  um: unexport handle_page_fault()
  um: remove a dangling extern of syscall_trace()
  um: kill unused cpu()
  uml/i386: missing include in barrier.h
  um: stop polluting the namespace with registers.h contents
  logic_io instance of iounmap() needs volatile on argument
  um: move amd64 variant of mmap(2) to arch/x86/um/syscalls_64.c
  ...
2022-01-11 15:26:52 -08:00
Linus Torvalds
4a110907a1 hwmon updates for v5.17
New drivers:
 - PMBus driver for MPS Multi-phase mp5023
 - PMBus driver for Delta AHE-50DC fan control module
 - Driver for NZXT RGB&Fan Controller/Smart Device v2
 - Driver for Texas Instruments INA238
 - Driver to support X370 Asus WMI
 - Driver to support B550 Asus WMI
 
 Other notable changes:
 - Cleanup of ntc_thermistor driver, and added support for Samsung 1404-001221 NTC
 - Improve detection of LM84, MAX1617, and MAX1617A in adm1021 driver
 - Clean up tmp401 driver, and convert to with_info API
 - Add support for regulators and IR38060, IR38164 IR38263 to ir38064 PMBus driver
 - Add support for AMD Family 19h Models 10h-1Fh and A0h-AFh to k10temp driver
 - Add support for F81966 to f71882fg driver
 - Add support for ONSEMI N34TS04 to jc42 driver
 - Clean up and simplify dell-smm driver
 - Add support for ROG STRIX B550-A/X570-I GAMING to nct6775 driver
 
 Various other minor improvements and fixes.
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Merge tag 'hwmon-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging

Pull hwmon updates from Guenter Roeck:
 "New drivers:

   - PMBus driver for MPS Multi-phase mp5023

   - PMBus driver for Delta AHE-50DC fan control module

   - Driver for NZXT RGB&Fan Controller/Smart Device v2

   - Driver for Texas Instruments INA238

   - Driver to support X370 Asus WMI

   - Driver to support B550 Asus WMI

  Other notable changes:

   - Cleanup of ntc_thermistor driver, and added support for Samsung
     1404-001221 NTC

   - Improve detection of LM84, MAX1617, and MAX1617A in adm1021 driver

   - Clean up tmp401 driver, and convert to with_info API

   - Add support for regulators and IR38060, IR38164 IR38263 to ir38064
     PMBus driver

   - Add support for AMD Family 19h Models 10h-1Fh and A0h-AFh to
     k10temp driver

   - Add support for F81966 to f71882fg driver

   - Add support for ONSEMI N34TS04 to jc42 driver

   - Clean up and simplify dell-smm driver

   - Add support for ROG STRIX B550-A/X570-I GAMING to nct6775 driver

  And various other minor improvements and fixes"

* tag 'hwmon-for-v5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/groeck/linux-staging: (49 commits)
  hwmon: (nzxt-smart2) make array detect_fans_report static const
  hwmon: (xgene-hwmon) Add free before exiting xgene_hwmon_probe
  hwmon: (nzxt-smart2) Fix "unused function" warning
  hwmon: (dell-smm) Pack the whole smm_regs struct
  hwmon: (nct6775) Additional check for ChipID before ASUS WMI usage
  hwmon: (mr75203) fix wrong power-up delay value
  hwmon/pmbus: (ir38064) Fix spelling mistake "comaptible" -> "compatible"
  hwmon/pmbus: (ir38064) Expose a regulator
  hwmon/pmbus: (ir38064) Add of_match_table
  hwmon/pmbus: (ir38064) Add support for IR38060, IR38164 IR38263
  hwmon: add driver for NZXT RGB&Fan Controller/Smart Device v2.
  hwmon: (nct6775) add ROG STRIX B550-A/X570-I GAMING
  hwmon: (pmbus) Add support for MPS Multi-phase mp5023
  dt-bindings: add Delta AHE-50DC fan control module
  hwmon: (pmbus) Add Delta AHE-50DC fan control module driver
  hwmon: prefix kernel-doc comments for structs with struct
  hwmon: (ntc_thermistor) Add Samsung 1404-001221 NTC
  hwmon: (ntc_thermistor) Drop OF dependency
  hwmon: (dell-smm) Unify i8k_ioctl() and i8k_ioctl_unlocked()
  hwmon: (dell-smm) Simplify ioctl handler
  ...
2022-01-11 10:25:36 -08:00
Linus Torvalds
5c947d0dba Merge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Pull crypto updates from Herbert Xu:
 "Algorithms:

   - Drop alignment requirement for data in aesni

   - Use synchronous seeding from the /dev/random in DRBG

   - Reseed nopr DRBGs every 5 minutes from /dev/random

   - Add KDF algorithms currently used by security/DH

   - Fix lack of entropy on some AMD CPUs with jitter RNG

  Drivers:

   - Add support for the D1 variant in sun8i-ce

   - Add SEV_INIT_EX support in ccp

   - PFVF support for GEN4 host driver in qat

   - Compression support for GEN4 devices in qat

   - Add cn10k random number generator support"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6: (145 commits)
  crypto: af_alg - rewrite NULL pointer check
  lib/mpi: Add the return value check of kcalloc()
  crypto: qat - fix definition of ring reset results
  crypto: hisilicon - cleanup warning in qm_get_qos_value()
  crypto: kdf - select SHA-256 required for self-test
  crypto: x86/aesni - don't require alignment of data
  crypto: ccp - remove unneeded semicolon
  crypto: stm32/crc32 - Fix kernel BUG triggered in probe()
  crypto: s390/sha512 - Use macros instead of direct IV numbers
  crypto: sparc/sha - remove duplicate hash init function
  crypto: powerpc/sha - remove duplicate hash init function
  crypto: mips/sha - remove duplicate hash init function
  crypto: sha256 - remove duplicate generic hash init function
  crypto: jitter - add oversampling of noise source
  MAINTAINERS: update SEC2 driver maintainers list
  crypto: ux500 - Use platform_get_irq() to get the interrupt
  crypto: hisilicon/qm - disable qm clock-gating
  crypto: omap-aes - Fix broken pm_runtime_and_get() usage
  MAINTAINERS: update caam crypto driver maintainers list
  crypto: octeontx2 - prevent underflow in get_cores_bmap()
  ...
2022-01-11 10:21:35 -08:00
Linus Torvalds
1be5bdf8cd KCSAN updates for v5.17
This series provides KCSAN fixes and also the ability to take memory
 barriers into account for weakly-ordered systems.  This last can increase
 the probability of detecting certain types of data races.
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Merge tag 'kcsan.2022.01.09a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu

Pull KCSAN updates from Paul McKenney:
 "This provides KCSAN fixes and also the ability to take memory barriers
  into account for weakly-ordered systems. This last can increase the
  probability of detecting certain types of data races"

* tag 'kcsan.2022.01.09a' of git://git.kernel.org/pub/scm/linux/kernel/git/paulmck/linux-rcu: (29 commits)
  kcsan: Only test clear_bit_unlock_is_negative_byte if arch defines it
  kcsan: Avoid nested contexts reading inconsistent reorder_access
  kcsan: Turn barrier instrumentation into macros
  kcsan: Make barrier tests compatible with lockdep
  kcsan: Support WEAK_MEMORY with Clang where no objtool support exists
  compiler_attributes.h: Add __disable_sanitizer_instrumentation
  objtool, kcsan: Remove memory barrier instrumentation from noinstr
  objtool, kcsan: Add memory barrier instrumentation to whitelist
  sched, kcsan: Enable memory barrier instrumentation
  mm, kcsan: Enable barrier instrumentation
  x86/qspinlock, kcsan: Instrument barrier of pv_queued_spin_unlock()
  x86/barriers, kcsan: Use generic instrumentation for non-smp barriers
  asm-generic/bitops, kcsan: Add instrumentation for barriers
  locking/atomics, kcsan: Add instrumentation for barriers
  locking/barriers, kcsan: Support generic instrumentation
  locking/barriers, kcsan: Add instrumentation for barriers
  kcsan: selftest: Add test case to check memory barrier instrumentation
  kcsan: Ignore GCC 11+ warnings about TSan runtime support
  kcsan: test: Add test cases for memory barrier instrumentation
  kcsan: test: Match reordered or normal accesses
  ...
2022-01-11 09:51:26 -08:00
Longji Guo
346865f074 x86/PCI: Remove initialization of static variables to false
Remove the initialization of pci_ignore_seg to false which is pointless.

Link: https://lore.kernel.org/r/20211203080758.962-1-guolongji@uniontech.com
Signed-off-by: Longji Guo <guolongji@uniontech.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
2022-01-11 11:05:35 -06:00
Hans de Goede
7f7b4236f2 x86/PCI: Ignore E820 reservations for bridge windows on newer systems
Some BIOS-es contain a bug where they add addresses which map to system
RAM in the PCI host bridge window returned by the ACPI _CRS method, see
commit 4dc2287c18 ("x86: avoid E820 regions when allocating address
space").

To work around this bug Linux excludes E820 reserved addresses when
allocating addresses from the PCI host bridge window since 2010.

Recently (2019) some systems have shown-up with E820 reservations which
cover the entire _CRS returned PCI bridge memory window, causing all
attempts to assign memory to PCI BARs which have not been setup by the
BIOS to fail. For example here are the relevant dmesg bits from a
Lenovo IdeaPad 3 15IIL 81WE:

 [mem 0x000000004bc50000-0x00000000cfffffff] reserved
 pci_bus 0000:00: root bus resource [mem 0x65400000-0xbfffffff window]

The ACPI specifications appear to allow this new behavior:

The relationship between E820 and ACPI _CRS is not really very clear.
ACPI v6.3, sec 15, table 15-374, says AddressRangeReserved means:

  This range of addresses is in use or reserved by the system and is
  not to be included in the allocatable memory pool of the operating
  system's memory manager.

and it may be used when:

  The address range is in use by a memory-mapped system device.

Furthermore, sec 15.2 says:

  Address ranges defined for baseboard memory-mapped I/O devices, such
  as APICs, are returned as reserved.

A PCI host bridge qualifies as a baseboard memory-mapped I/O device,
and its apertures are in use and certainly should not be included in
the general allocatable pool, so the fact that some BIOS-es reports
the PCI aperture as "reserved" in E820 doesn't seem like a BIOS bug.

So it seems that the excluding of E820 reserved addresses is a mistake.

Ideally Linux would fully stop excluding E820 reserved addresses,
but then the old systems this was added for will regress.
Instead keep the old behavior for old systems, while ignoring
the E820 reservations for any systems from now on.

Old systems are defined here as BIOS year < 2018, this was chosen to make
sure that E820 reservations will not be used on the currently affected
systems, while at the same time also taking into account that the systems
for which the E820 checking was originally added may have received BIOS
updates for quite a while (esp. CVE related ones), giving them a more
recent BIOS year then 2010.

BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=206459
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1868899
BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1871793
BugLink: https://bugs.launchpad.net/bugs/1878279
BugLink: https://bugs.launchpad.net/bugs/1931715
BugLink: https://bugs.launchpad.net/bugs/1932069
BugLink: https://bugs.launchpad.net/bugs/1921649
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Bjorn Helgaas <bhelgaas@google.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2022-01-11 16:22:37 +01:00
Linus Torvalds
b35b6d4d71 Power management updates for 5.17-rc1
- Add new P-state driver for AMD processors (Huang Rui).
 
  - Fix initialization of min and max frequency QoS requests in the
    cpufreq core (Rafael Wysocki).
 
  - Fix EPP handling on Alder Lake in intel_pstate (Srinivas Pandruvada).
 
  - Make intel_pstate update cpuinfo.max_freq when notified of HWP
    capabilities changes and drop a redundant function call from that
    driver (Rafael Wysocki).
 
  - Improve IRQ support in the Qcom cpufreq driver (Ard Biesheuvel,
    Stephen Boyd, Vladimir Zapolskiy).
 
  - Fix double devm_remap() in the Mediatek cpufreq driver (Hector Yuan).
 
  - Introduce thermal pressure helpers for cpufreq CPU cooling (Lukasz
    Luba).
 
  - Make cpufreq use default_groups in kobj_type (Greg Kroah-Hartman).
 
  - Make cpuidle use default_groups in kobj_type (Greg Kroah-Hartman).
 
  - Fix two comments in cpuidle code (Jason Wang, Yang Li).
 
  - Allow model-specific normal EPB value to be used in the intel_epb
    sysfs attribute handling code (Srinivas Pandruvada).
 
  - Simplify locking in pm_runtime_put_suppliers() (Rafael Wysocki).
 
  - Add safety net to supplier device release in the runtime PM core
    code (Rafael Wysocki).
 
  - Capture device status before disabling runtime PM for it (Rafael
    Wysocki).
 
  - Add new macros for declaring PM operations to allow drivers to
    avoid guarding them with CONFIG_PM #ifdefs or __maybe_unused and
    update some drivers to use these macros (Paul Cercueil).
 
  - Allow ACPI hardware signature to be honoured during restore from
    hibernation (David Woodhouse).
 
  - Update outdated operating performance points (OPP) documentation
    (Tang Yizhou).
 
  - Reduce log severity for informative message regarding frequency
    transition failures in devfreq (Tzung-Bi Shih).
 
  - Add DRAM frequency controller devfreq driver for Allwinner sunXi
    SoCs (Samuel Holland).
 
  - Add missing COMMON_CLK dependency to sun8i devfreq driver (Arnd
    Bergmann).
 
  - Add support for new layout of Psys PowerLimit Register on SPR to
    the Intel RAPL power capping driver (Zhang Rui).
 
  - Fix typo in a comment in idle_inject.c (Jason Wang).
 
  - Remove unused function definition from the DTPM (Dynamit Thermal
    Power Management) power capping framework (Daniel Lezcano).
 
  - Reduce DTPM trace verbosity (Daniel Lezcano).
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Merge tag 'pm-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull power management updates from Rafael Wysocki:
 "The most signigicant change here is the addition of a new cpufreq
  'P-state' driver for AMD processors as a better replacement for the
  venerable acpi-cpufreq driver.

  There are also other cpufreq updates (in the core, intel_pstate, ARM
  drivers), PM core updates (mostly related to adding new macros for
  declaring PM operations which should make the lives of driver
  developers somewhat easier), and a bunch of assorted fixes and
  cleanups.

  Summary:

   - Add new P-state driver for AMD processors (Huang Rui).

   - Fix initialization of min and max frequency QoS requests in the
     cpufreq core (Rafael Wysocki).

   - Fix EPP handling on Alder Lake in intel_pstate (Srinivas
     Pandruvada).

   - Make intel_pstate update cpuinfo.max_freq when notified of HWP
     capabilities changes and drop a redundant function call from that
     driver (Rafael Wysocki).

   - Improve IRQ support in the Qcom cpufreq driver (Ard Biesheuvel,
     Stephen Boyd, Vladimir Zapolskiy).

   - Fix double devm_remap() in the Mediatek cpufreq driver (Hector
     Yuan).

   - Introduce thermal pressure helpers for cpufreq CPU cooling (Lukasz
     Luba).

   - Make cpufreq use default_groups in kobj_type (Greg Kroah-Hartman).

   - Make cpuidle use default_groups in kobj_type (Greg Kroah-Hartman).

   - Fix two comments in cpuidle code (Jason Wang, Yang Li).

   - Allow model-specific normal EPB value to be used in the intel_epb
     sysfs attribute handling code (Srinivas Pandruvada).

   - Simplify locking in pm_runtime_put_suppliers() (Rafael Wysocki).

   - Add safety net to supplier device release in the runtime PM core
     code (Rafael Wysocki).

   - Capture device status before disabling runtime PM for it (Rafael
     Wysocki).

   - Add new macros for declaring PM operations to allow drivers to
     avoid guarding them with CONFIG_PM #ifdefs or __maybe_unused and
     update some drivers to use these macros (Paul Cercueil).

   - Allow ACPI hardware signature to be honoured during restore from
     hibernation (David Woodhouse).

   - Update outdated operating performance points (OPP) documentation
     (Tang Yizhou).

   - Reduce log severity for informative message regarding frequency
     transition failures in devfreq (Tzung-Bi Shih).

   - Add DRAM frequency controller devfreq driver for Allwinner sunXi
     SoCs (Samuel Holland).

   - Add missing COMMON_CLK dependency to sun8i devfreq driver (Arnd
     Bergmann).

   - Add support for new layout of Psys PowerLimit Register on SPR to
     the Intel RAPL power capping driver (Zhang Rui).

   - Fix typo in a comment in idle_inject.c (Jason Wang).

   - Remove unused function definition from the DTPM (Dynamit Thermal
     Power Management) power capping framework (Daniel Lezcano).

   - Reduce DTPM trace verbosity (Daniel Lezcano)"

* tag 'pm-5.17-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (53 commits)
  x86, sched: Fix undefined reference to init_freq_invariance_cppc() build error
  cpufreq: amd-pstate: Fix Kconfig dependencies for AMD P-State
  cpufreq: amd-pstate: Fix struct amd_cpudata kernel-doc comment
  cpuidle: use default_groups in kobj_type
  x86: intel_epb: Allow model specific normal EPB value
  MAINTAINERS: Add AMD P-State driver maintainer entry
  Documentation: amd-pstate: Add AMD P-State driver introduction
  cpufreq: amd-pstate: Add AMD P-State performance attributes
  cpufreq: amd-pstate: Add AMD P-State frequencies attributes
  cpufreq: amd-pstate: Add boost mode support for AMD P-State
  cpufreq: amd-pstate: Add trace for AMD P-State module
  cpufreq: amd-pstate: Introduce the support for the processors with shared memory solution
  cpufreq: amd-pstate: Add fast switch function for AMD P-State
  cpufreq: amd-pstate: Introduce a new AMD P-State driver to support future processors
  ACPI: CPPC: Add CPPC enable register function
  ACPI: CPPC: Check present CPUs for determining _CPC is valid
  ACPI: CPPC: Implement support for SystemIO registers
  x86/msr: Add AMD CPPC MSR definitions
  x86/cpufeatures: Add AMD Collaborative Processor Performance Control feature flag
  cpufreq: use default_groups in kobj_type
  ...
2022-01-10 20:34:00 -08:00
Linus Torvalds
8efd0d9c31 Networking changes for 5.17.
Core
 ----
 
  - Defer freeing TCP skbs to the BH handler, whenever possible,
    or at least perform the freeing outside of the socket lock section
    to decrease cross-CPU allocator work and improve latency.
 
  - Add netdevice refcount tracking to locate sources of netdevice
    and net namespace refcount leaks.
 
  - Make Tx watchdog less intrusive - avoid pausing Tx and restarting
    all queues from a single CPU removing latency spikes.
 
  - Various small optimizations throughout the stack from Eric Dumazet.
 
  - Make netdev->dev_addr[] constant, force modifications to go via
    appropriate helpers to allow us to keep addresses in ordered data
    structures.
 
  - Replace unix_table_lock with per-hash locks, improving performance
    of bind() calls.
 
  - Extend skb drop tracepoint with a drop reason.
 
  - Allow SO_MARK and SO_PRIORITY setsockopt under CAP_NET_RAW.
 
 BPF
 ---
 
  - New helpers:
    - bpf_find_vma(), find and inspect VMAs for profiling use cases
    - bpf_loop(), runtime-bounded loop helper trading some execution
      time for much faster (if at all converging) verification
    - bpf_strncmp(), improve performance, avoid compiler flakiness
    - bpf_get_func_arg(), bpf_get_func_ret(), bpf_get_func_arg_cnt()
      for tracing programs, all inlined by the verifier
 
  - Support BPF relocations (CO-RE) in the kernel loader.
 
  - Further the support for BTF_TYPE_TAG annotations.
 
  - Allow access to local storage in sleepable helpers.
 
  - Convert verifier argument types to a composable form with different
    attributes which can be shared across types (ro, maybe-null).
 
  - Prepare libbpf for upcoming v1.0 release by cleaning up APIs,
    creating new, extensible ones where missing and deprecating those
    to be removed.
 
 Protocols
 ---------
 
  - WiFi (mac80211/cfg80211):
    - notify user space about long "come back in N" AP responses,
      allow it to react to such temporary rejections
    - allow non-standard VHT MCS 10/11 rates
    - use coarse time in airtime fairness code to save CPU cycles
 
  - Bluetooth:
    - rework of HCI command execution serialization to use a common
      queue and work struct, and improve handling errors reported
      in the middle of a batch of commands
    - rework HCI event handling to use skb_pull_data, avoiding packet
      parsing pitfalls
    - support AOSP Bluetooth Quality Report
 
  - SMC:
    - support net namespaces, following the RDMA model
    - improve connection establishment latency by pre-clearing buffers
    - introduce TCP ULP for automatic redirection to SMC
 
  - Multi-Path TCP:
    - support ioctls: SIOCINQ, OUTQ, and OUTQNSD
    - support socket options: IP_TOS, IP_FREEBIND, IP_TRANSPARENT,
      IPV6_FREEBIND, and IPV6_TRANSPARENT, TCP_CORK and TCP_NODELAY
    - support cmsgs: TCP_INQ
    - improvements in the data scheduler (assigning data to subflows)
    - support fastclose option (quick shutdown of the full MPTCP
      connection, similar to TCP RST in regular TCP)
 
  - MCTP (Management Component Transport) over serial, as defined by
    DMTF spec DSP0253 - "MCTP Serial Transport Binding".
 
 Driver API
 ----------
 
  - Support timestamping on bond interfaces in active/passive mode.
 
  - Introduce generic phylink link mode validation for drivers which
    don't have any quirks and where MAC capability bits fully express
    what's supported. Allow PCS layer to participate in the validation.
    Convert a number of drivers.
 
  - Add support to set/get size of buffers on the Rx rings and size of
    the tx copybreak buffer via ethtool.
 
  - Support offloading TC actions as first-class citizens rather than
    only as attributes of filters, improve sharing and device resource
    utilization.
 
  - WiFi (mac80211/cfg80211):
    - support forwarding offload (ndo_fill_forward_path)
    - support for background radar detection hardware
    - SA Query Procedures offload on the AP side
 
 New hardware / drivers
 ----------------------
 
  - tsnep - FPGA based TSN endpoint Ethernet MAC used in PLCs with
    real-time requirements for isochronous communication with protocols
    like OPC UA Pub/Sub.
 
  - Qualcomm BAM-DMUX WWAN - driver for data channels of modems
    integrated into many older Qualcomm SoCs, e.g. MSM8916 or
    MSM8974 (qcom_bam_dmux).
 
  - Microchip LAN966x multi-port Gigabit AVB/TSN Ethernet Switch
    driver with support for bridging, VLANs and multicast forwarding
    (lan966x).
 
  - iwlmei driver for co-operating between Intel's WiFi driver and
    Intel's Active Management Technology (AMT) devices.
 
  - mse102x - Vertexcom MSE102x Homeplug GreenPHY chips
 
  - Bluetooth:
    - MediaTek MT7921 SDIO devices
    - Foxconn MT7922A
    - Realtek RTL8852AE
 
 Drivers
 -------
 
  - Significantly improve performance in the datapaths of:
    lan78xx, ax88179_178a, lantiq_xrx200, bnxt.
 
  - Intel Ethernet NICs:
    - igb: support PTP/time PEROUT and EXTTS SDP functions on
      82580/i354/i350 adapters
    - ixgbevf: new PF -> VF mailbox API which avoids the risk of
      mailbox corruption with ESXi
    - iavf: support configuration of VLAN features of finer granularity,
      stacked tags and filtering
    - ice: PTP support for new E822 devices with sub-ns precision
    - ice: support firmware activation without reboot
 
  - Mellanox Ethernet NICs (mlx5):
    - expose control over IRQ coalescing mode (CQE vs EQE) via ethtool
    - support TC forwarding when tunnel encap and decap happen between
      two ports of the same NIC
    - dynamically size and allow disabling various features to save
      resources for running in embedded / SmartNIC scenarios
 
  - Broadcom Ethernet NICs (bnxt):
    - use page frag allocator to improve Rx performance
    - expose control over IRQ coalescing mode (CQE vs EQE) via ethtool
 
  - Other Ethernet NICs:
    - amd-xgbe: add Ryzen 6000 (Yellow Carp) Ethernet support
 
  - Microsoft cloud/virtual NIC (mana):
    - add XDP support (PASS, DROP, TX)
 
  - Mellanox Ethernet switches (mlxsw):
    - initial support for Spectrum-4 ASICs
    - VxLAN with IPv6 underlay
 
  - Marvell Ethernet switches (prestera):
    - support flower flow templates
    - add basic IP forwarding support
 
  - NXP embedded Ethernet switches (ocelot & felix):
    - support Per-Stream Filtering and Policing (PSFP)
    - enable cut-through forwarding between ports by default
    - support FDMA to improve packet Rx/Tx to CPU
 
  - Other embedded switches:
    - hellcreek: improve trapping management (STP and PTP) packets
    - qca8k: support link aggregation and port mirroring
 
  - Qualcomm 802.11ax WiFi (ath11k):
    - qca6390, wcn6855: enable 802.11 power save mode in station mode
    - BSS color change support
    - WCN6855 hw2.1 support
    - 11d scan offload support
    - scan MAC address randomization support
    - full monitor mode, only supported on QCN9074
    - qca6390/wcn6855: report signal and tx bitrate
    - qca6390: rfkill support
    - qca6390/wcn6855: regdb.bin support
 
  - Intel WiFi (iwlwifi):
    - support SAR GEO Offset Mapping (SGOM) and Time-Aware-SAR (TAS)
      in cooperation with the BIOS
    - support for Optimized Connectivity Experience (OCE) scan
    - support firmware API version 68
    - lots of preparatory work for the upcoming Bz device family
 
  - MediaTek WiFi (mt76):
    - Specific Absorption Rate (SAR) support
    - mt7921: 160 MHz channel support
 
  - RealTek WiFi (rtw88):
    - Specific Absorption Rate (SAR) support
    - scan offload
 
  - Other WiFi NICs
    - ath10k: support fetching (pre-)calibration data from nvmem
    - brcmfmac: configure keep-alive packet on suspend
    - wcn36xx: beacon filter support
 
 Signed-off-by: Jakub Kicinski <kuba@kernel.org>
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Merge tag '5.17-net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next

Pull networking updates from Jakub Kicinski:
 "Core
  ----

   - Defer freeing TCP skbs to the BH handler, whenever possible, or at
     least perform the freeing outside of the socket lock section to
     decrease cross-CPU allocator work and improve latency.

   - Add netdevice refcount tracking to locate sources of netdevice and
     net namespace refcount leaks.

   - Make Tx watchdog less intrusive - avoid pausing Tx and restarting
     all queues from a single CPU removing latency spikes.

   - Various small optimizations throughout the stack from Eric Dumazet.

   - Make netdev->dev_addr[] constant, force modifications to go via
     appropriate helpers to allow us to keep addresses in ordered data
     structures.

   - Replace unix_table_lock with per-hash locks, improving performance
     of bind() calls.

   - Extend skb drop tracepoint with a drop reason.

   - Allow SO_MARK and SO_PRIORITY setsockopt under CAP_NET_RAW.

  BPF
  ---

   - New helpers:
      - bpf_find_vma(), find and inspect VMAs for profiling use cases
      - bpf_loop(), runtime-bounded loop helper trading some execution
        time for much faster (if at all converging) verification
      - bpf_strncmp(), improve performance, avoid compiler flakiness
      - bpf_get_func_arg(), bpf_get_func_ret(), bpf_get_func_arg_cnt()
        for tracing programs, all inlined by the verifier

   - Support BPF relocations (CO-RE) in the kernel loader.

   - Further the support for BTF_TYPE_TAG annotations.

   - Allow access to local storage in sleepable helpers.

   - Convert verifier argument types to a composable form with different
     attributes which can be shared across types (ro, maybe-null).

   - Prepare libbpf for upcoming v1.0 release by cleaning up APIs,
     creating new, extensible ones where missing and deprecating those
     to be removed.

  Protocols
  ---------

   - WiFi (mac80211/cfg80211):
      - notify user space about long "come back in N" AP responses,
        allow it to react to such temporary rejections
      - allow non-standard VHT MCS 10/11 rates
      - use coarse time in airtime fairness code to save CPU cycles

   - Bluetooth:
      - rework of HCI command execution serialization to use a common
        queue and work struct, and improve handling errors reported in
        the middle of a batch of commands
      - rework HCI event handling to use skb_pull_data, avoiding packet
        parsing pitfalls
      - support AOSP Bluetooth Quality Report

   - SMC:
      - support net namespaces, following the RDMA model
      - improve connection establishment latency by pre-clearing buffers
      - introduce TCP ULP for automatic redirection to SMC

   - Multi-Path TCP:
      - support ioctls: SIOCINQ, OUTQ, and OUTQNSD
      - support socket options: IP_TOS, IP_FREEBIND, IP_TRANSPARENT,
        IPV6_FREEBIND, and IPV6_TRANSPARENT, TCP_CORK and TCP_NODELAY
      - support cmsgs: TCP_INQ
      - improvements in the data scheduler (assigning data to subflows)
      - support fastclose option (quick shutdown of the full MPTCP
        connection, similar to TCP RST in regular TCP)

   - MCTP (Management Component Transport) over serial, as defined by
     DMTF spec DSP0253 - "MCTP Serial Transport Binding".

  Driver API
  ----------

   - Support timestamping on bond interfaces in active/passive mode.

   - Introduce generic phylink link mode validation for drivers which
     don't have any quirks and where MAC capability bits fully express
     what's supported. Allow PCS layer to participate in the validation.
     Convert a number of drivers.

   - Add support to set/get size of buffers on the Rx rings and size of
     the tx copybreak buffer via ethtool.

   - Support offloading TC actions as first-class citizens rather than
     only as attributes of filters, improve sharing and device resource
     utilization.

   - WiFi (mac80211/cfg80211):
      - support forwarding offload (ndo_fill_forward_path)
      - support for background radar detection hardware
      - SA Query Procedures offload on the AP side

  New hardware / drivers
  ----------------------

   - tsnep - FPGA based TSN endpoint Ethernet MAC used in PLCs with
     real-time requirements for isochronous communication with protocols
     like OPC UA Pub/Sub.

   - Qualcomm BAM-DMUX WWAN - driver for data channels of modems
     integrated into many older Qualcomm SoCs, e.g. MSM8916 or MSM8974
     (qcom_bam_dmux).

   - Microchip LAN966x multi-port Gigabit AVB/TSN Ethernet Switch driver
     with support for bridging, VLANs and multicast forwarding
     (lan966x).

   - iwlmei driver for co-operating between Intel's WiFi driver and
     Intel's Active Management Technology (AMT) devices.

   - mse102x - Vertexcom MSE102x Homeplug GreenPHY chips

   - Bluetooth:
      - MediaTek MT7921 SDIO devices
      - Foxconn MT7922A
      - Realtek RTL8852AE

  Drivers
  -------

   - Significantly improve performance in the datapaths of: lan78xx,
     ax88179_178a, lantiq_xrx200, bnxt.

   - Intel Ethernet NICs:
      - igb: support PTP/time PEROUT and EXTTS SDP functions on
        82580/i354/i350 adapters
      - ixgbevf: new PF -> VF mailbox API which avoids the risk of
        mailbox corruption with ESXi
      - iavf: support configuration of VLAN features of finer
        granularity, stacked tags and filtering
      - ice: PTP support for new E822 devices with sub-ns precision
      - ice: support firmware activation without reboot

   - Mellanox Ethernet NICs (mlx5):
      - expose control over IRQ coalescing mode (CQE vs EQE) via ethtool
      - support TC forwarding when tunnel encap and decap happen between
        two ports of the same NIC
      - dynamically size and allow disabling various features to save
        resources for running in embedded / SmartNIC scenarios

   - Broadcom Ethernet NICs (bnxt):
      - use page frag allocator to improve Rx performance
      - expose control over IRQ coalescing mode (CQE vs EQE) via ethtool

   - Other Ethernet NICs:
      - amd-xgbe: add Ryzen 6000 (Yellow Carp) Ethernet support

   - Microsoft cloud/virtual NIC (mana):
      - add XDP support (PASS, DROP, TX)

   - Mellanox Ethernet switches (mlxsw):
      - initial support for Spectrum-4 ASICs
      - VxLAN with IPv6 underlay

   - Marvell Ethernet switches (prestera):
      - support flower flow templates
      - add basic IP forwarding support

   - NXP embedded Ethernet switches (ocelot & felix):
      - support Per-Stream Filtering and Policing (PSFP)
      - enable cut-through forwarding between ports by default
      - support FDMA to improve packet Rx/Tx to CPU

   - Other embedded switches:
      - hellcreek: improve trapping management (STP and PTP) packets
      - qca8k: support link aggregation and port mirroring

   - Qualcomm 802.11ax WiFi (ath11k):
      - qca6390, wcn6855: enable 802.11 power save mode in station mode
      - BSS color change support
      - WCN6855 hw2.1 support
      - 11d scan offload support
      - scan MAC address randomization support
      - full monitor mode, only supported on QCN9074
      - qca6390/wcn6855: report signal and tx bitrate
      - qca6390: rfkill support
      - qca6390/wcn6855: regdb.bin support

   - Intel WiFi (iwlwifi):
      - support SAR GEO Offset Mapping (SGOM) and Time-Aware-SAR (TAS)
        in cooperation with the BIOS
      - support for Optimized Connectivity Experience (OCE) scan
      - support firmware API version 68
      - lots of preparatory work for the upcoming Bz device family

   - MediaTek WiFi (mt76):
      - Specific Absorption Rate (SAR) support
      - mt7921: 160 MHz channel support

   - RealTek WiFi (rtw88):
      - Specific Absorption Rate (SAR) support
      - scan offload

   - Other WiFi NICs
      - ath10k: support fetching (pre-)calibration data from nvmem
      - brcmfmac: configure keep-alive packet on suspend
      - wcn36xx: beacon filter support"

* tag '5.17-net-next' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (2048 commits)
  tcp: tcp_send_challenge_ack delete useless param `skb`
  net/qla3xxx: Remove useless DMA-32 fallback configuration
  rocker: Remove useless DMA-32 fallback configuration
  hinic: Remove useless DMA-32 fallback configuration
  lan743x: Remove useless DMA-32 fallback configuration
  net: enetc: Remove useless DMA-32 fallback configuration
  cxgb4vf: Remove useless DMA-32 fallback configuration
  cxgb4: Remove useless DMA-32 fallback configuration
  cxgb3: Remove useless DMA-32 fallback configuration
  bnx2x: Remove useless DMA-32 fallback configuration
  et131x: Remove useless DMA-32 fallback configuration
  be2net: Remove useless DMA-32 fallback configuration
  vmxnet3: Remove useless DMA-32 fallback configuration
  bna: Simplify DMA setting
  net: alteon: Simplify DMA setting
  myri10ge: Simplify DMA setting
  qlcnic: Simplify DMA setting
  net: allwinner: Fix print format
  page_pool: remove spinlock in page_pool_refill_alloc_cache()
  amt: fix wrong return type of amt_send_membership_update()
  ...
2022-01-10 19:06:09 -08:00
Linus Torvalds
8d0749b4f8 drm for 5.17-rc1
core:
 - add privacy screen support
 - move nomodeset option into drm subsystem
 - clean up nomodeset handling in drivers
 - make drm_irq.c legacy
 - fix stack_depot name conflicts
 - remove DMA_BUF_SET_NAME ioctl restrictions
 - sysfs: send hotplug event
 - replace several DRM_* logging macros with drm_*
 - move hashtable to legacy code
 - add error return from gem_create_object
 - cma-helper: improve interfaces, drop CONFIG_DRM_KMS_CMA_HELPER
 - kernel.h related include cleanups
 - support XRGB2101010 source buffers
 
 ttm:
 - don't include drm hashtable
 - stop pruning fences after wait
 - documentation updates
 
 dma-buf:
 - add dma_resv selftest
 - add debugfs helpers
 - remove dma_resv_get_excl_unlocked
 - documentation
 - make fences mandatory in dma_resv_add_excl_fence
 
 dp:
 - add link training delay helpers
 
 gem:
 - link shmem/cma helpers into separate modules
 - use dma_resv iteratior
 - import dma-buf namespace into gem helper modules
 
 scheduler:
 - fence grab fix
 - lockdep fixes
 
 bridge:
 - switch to managed MIPI DSI helpers
 - register and attach during probe fixes
 - convert to YAML in several places.
 
 panel:
 - add bunch of new panesl
 
 simpledrm:
 - support FB_DAMAGE_CLIPS
 - support virtual screen sizes
 - add Apple M1 support
 
 amdgpu:
 - enable seamless boot for DCN 3.01
 - runtime PM fixes
 - use drm_kms_helper_connector_hotplug_event
 - get all fences at once
 - use generic drm fb helpers
 - PSR/DPCD/LTTPR/DSC/PM/RAS/OLED/SRIOV fixes
 - add smart trace buffer (STB) for supported GPUs
 - display debugfs entries
 - new SMU debug option
 - Documentation update
 
 amdkfd:
 - IP discovery enumeration refactor
 - interface between driver fixes
 - SVM fixes
 - kfd uapi header to define some sysfs bitfields.
 
 i915:
 - support VESA panel backlights
 - enable ADL-P by default
 - add eDP privacy screen support
 - add Raptor Lake S (RPL-S) support
 - DG2 page table support
 - lots of GuC/HuC fw refactoring
 - refactored i915->gt interfaces
 - CD clock squashing support
 - enable 10-bit gamma support
 - update ADL-P DMC fw to v2.14
 - enable runtime PM autosuspend by default
 - ADL-P DSI support
 - per-lane DP drive settings for ICL+
 - add support for pipe C/D DMC firmware
 - Atomic gamma LUT updates
 - remove CCS FB stride restrictions on ADL-P
 - VRR platform support for display 11
 - add support for display audio codec keepalive
 - lots of display refactoring
 - fix runtime PM handling during PXP suspend
 - improved eviction performance with async TTM moves
 - async VMA unbinding improvements
 - VMA locking refactoring
 - improved error capture robustness
 - use per device iommu checks
 - drop bits stealing from i915_sw_fence function ptr
 - remove dma_resv_prune
 - add IC cache invalidation on DG2
 
 nouveau:
 - crc fixes
 - validate LUTs in atomic check
 - set HDMI AVI RGB quant to full
 
 tegra:
 - buffer objects reworks for dma-buf compat
 - NVDEC driver uAPI support
 - power management improvements
 
 etnaviv:
 - IOMMU enabled system support
 - fix > 4GB command buffer mapping
 - close a DoS vector
 - fix spurious GPU resets
 
 ast:
 - fix i2c initialization
 
 rcar-du:
 - DSI output support
 
 exynos:
 - replace legacy gpio interface
 - implement generic GEM object mmap
 
 msm:
 - dpu plane state cleanup in prep for multirect
 - dpu debugfs cleanups
 - dp support for sc7280
 - a506 support
 - removal of struct_mutex
 - remove old eDP sub-driver
 
 anx7625:
 - support MIPI DSI input
 - support HDMI audio
 - fix reading EDID
 
 lvds:
 - fix bridge DT bindings
 
 megachips:
 - probe both bridges before registering
 
 dw-hdmi:
 - allow interlace on bridge
 
 ps8640:
 - enable runtime PM
 - support aux-bus
 
 tx358768:
 - enable reference clock
 - add pulse mode support
 
 ti-sn65dsi86:
 - use regmap bulk write
 - add PWM support
 
 etnaviv:
 - get all fences at once
 
 gma500:
 - gem object cleanups
 
 kmb:
 - enable fb console
 
 radeon:
 - use dma_resv_wait_timeout
 
 rockchip:
 - add DSP hold timeout
 - suspend/resume fixes
 - PLL clock fixes
 - implement mmap in GEM object functions
 - use generic fbdev emulation
 
 sun4i:
 - use CMA helpers without vmap support
 
 vc4:
 - fix HDMI-CEC hang with display is off
 - power on HDMI controller while disabling
 - support 4K@60Hz modes
 - support 10-bit YUV 4:2:0 output
 
 vmwgfx:
 - fix leak on probe errors
 - fail probing on broken hosts
 - new placement for MOB page tables
 - hide internal BOs from userspace
 - implement GEM support
 - implement GL 4.3 support
 
 virtio:
 - overflow fixes
 
 xen:
 - implement mmap as GEM object function
 
 omapdrm:
 - fix scatterlist export
 - support virtual planes
 
 mediatek:
 - MT8192 support
 - CMDQ refinement
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Merge tag 'drm-next-2022-01-07' of git://anongit.freedesktop.org/drm/drm

Pull drm updates from Dave Airlie:
 "Highlights are support for privacy screens found in new laptops, a
  bunch of nomodeset refactoring, and i915 enables ADL-P systems by
  default, while starting to add RPL-S support.

  vmwgfx adds GEM and support for OpenGL 4.3 features in userspace.

  Lots of internal refactorings around dma reservations, and lots of
  driver refactoring as well.

  Summary:

  core:
   - add privacy screen support
   - move nomodeset option into drm subsystem
   - clean up nomodeset handling in drivers
   - make drm_irq.c legacy
   - fix stack_depot name conflicts
   - remove DMA_BUF_SET_NAME ioctl restrictions
   - sysfs: send hotplug event
   - replace several DRM_* logging macros with drm_*
   - move hashtable to legacy code
   - add error return from gem_create_object
   - cma-helper: improve interfaces, drop CONFIG_DRM_KMS_CMA_HELPER
   - kernel.h related include cleanups
   - support XRGB2101010 source buffers

  ttm:
   - don't include drm hashtable
   - stop pruning fences after wait
   - documentation updates

  dma-buf:
   - add dma_resv selftest
   - add debugfs helpers
   - remove dma_resv_get_excl_unlocked
   - documentation
   - make fences mandatory in dma_resv_add_excl_fence

  dp:
   - add link training delay helpers

  gem:
   - link shmem/cma helpers into separate modules
   - use dma_resv iteratior
   - import dma-buf namespace into gem helper modules

  scheduler:
   - fence grab fix
   - lockdep fixes

  bridge:
   - switch to managed MIPI DSI helpers
   - register and attach during probe fixes
   - convert to YAML in several places.

  panel:
   - add bunch of new panesl

  simpledrm:
   - support FB_DAMAGE_CLIPS
   - support virtual screen sizes
   - add Apple M1 support

  amdgpu:
   - enable seamless boot for DCN 3.01
   - runtime PM fixes
   - use drm_kms_helper_connector_hotplug_event
   - get all fences at once
   - use generic drm fb helpers
   - PSR/DPCD/LTTPR/DSC/PM/RAS/OLED/SRIOV fixes
   - add smart trace buffer (STB) for supported GPUs
   - display debugfs entries
   - new SMU debug option
   - Documentation update

  amdkfd:
   - IP discovery enumeration refactor
   - interface between driver fixes
   - SVM fixes
   - kfd uapi header to define some sysfs bitfields.

  i915:
   - support VESA panel backlights
   - enable ADL-P by default
   - add eDP privacy screen support
   - add Raptor Lake S (RPL-S) support
   - DG2 page table support
   - lots of GuC/HuC fw refactoring
   - refactored i915->gt interfaces
   - CD clock squashing support
   - enable 10-bit gamma support
   - update ADL-P DMC fw to v2.14
   - enable runtime PM autosuspend by default
   - ADL-P DSI support
   - per-lane DP drive settings for ICL+
   - add support for pipe C/D DMC firmware
   - Atomic gamma LUT updates
   - remove CCS FB stride restrictions on ADL-P
   - VRR platform support for display 11
   - add support for display audio codec keepalive
   - lots of display refactoring
   - fix runtime PM handling during PXP suspend
   - improved eviction performance with async TTM moves
   - async VMA unbinding improvements
   - VMA locking refactoring
   - improved error capture robustness
   - use per device iommu checks
   - drop bits stealing from i915_sw_fence function ptr
   - remove dma_resv_prune
   - add IC cache invalidation on DG2

  nouveau:
   - crc fixes
   - validate LUTs in atomic check
   - set HDMI AVI RGB quant to full

  tegra:
   - buffer objects reworks for dma-buf compat
   - NVDEC driver uAPI support
   - power management improvements

  etnaviv:
   - IOMMU enabled system support
   - fix > 4GB command buffer mapping
   - close a DoS vector
   - fix spurious GPU resets

  ast:
   - fix i2c initialization

  rcar-du:
   - DSI output support

  exynos:
   - replace legacy gpio interface
   - implement generic GEM object mmap

  msm:
   - dpu plane state cleanup in prep for multirect
   - dpu debugfs cleanups
   - dp support for sc7280
   - a506 support
   - removal of struct_mutex
   - remove old eDP sub-driver

  anx7625:
   - support MIPI DSI input
   - support HDMI audio
   - fix reading EDID

  lvds:
   - fix bridge DT bindings

  megachips:
   - probe both bridges before registering

  dw-hdmi:
   - allow interlace on bridge

  ps8640:
   - enable runtime PM
   - support aux-bus

  tx358768:
   - enable reference clock
   - add pulse mode support

  ti-sn65dsi86:
   - use regmap bulk write
   - add PWM support

  etnaviv:
   - get all fences at once

  gma500:
   - gem object cleanups

  kmb:
   - enable fb console

  radeon:
   - use dma_resv_wait_timeout

  rockchip:
   - add DSP hold timeout
   - suspend/resume fixes
   - PLL clock fixes
   - implement mmap in GEM object functions
   - use generic fbdev emulation

  sun4i:
   - use CMA helpers without vmap support

  vc4:
   - fix HDMI-CEC hang with display is off
   - power on HDMI controller while disabling
   - support 4K@60Hz modes
   - support 10-bit YUV 4:2:0 output

  vmwgfx:
   - fix leak on probe errors
   - fail probing on broken hosts
   - new placement for MOB page tables
   - hide internal BOs from userspace
   - implement GEM support
   - implement GL 4.3 support

  virtio:
   - overflow fixes

  xen:
   - implement mmap as GEM object function

  omapdrm:
   - fix scatterlist export
   - support virtual planes

  mediatek:
   - MT8192 support
   - CMDQ refinement"

* tag 'drm-next-2022-01-07' of git://anongit.freedesktop.org/drm/drm: (1241 commits)
  drm/amdgpu: no DC support for headless chips
  drm/amd/display: fix dereference before NULL check
  drm/amdgpu: always reset the asic in suspend (v2)
  drm/amdgpu: put SMU into proper state on runpm suspending for BOCO capable platform
  drm/amd/display: Fix the uninitialized variable in enable_stream_features()
  drm/amdgpu: fix runpm documentation
  amdgpu/pm: Make sysfs pm attributes as read-only for VFs
  drm/amdgpu: save error count in RAS poison handler
  drm/amdgpu: drop redundant semicolon
  drm/amd/display: get and restore link res map
  drm/amd/display: support dynamic HPO DP link encoder allocation
  drm/amd/display: access hpo dp link encoder only through link resource
  drm/amd/display: populate link res in both detection and validation
  drm/amd/display: define link res and make it accessible to all link interfaces
  drm/amd/display: 3.2.167
  drm/amd/display: [FW Promotion] Release 0.0.98
  drm/amd/display: Undo ODM combine
  drm/amd/display: Add reg defs for DCN303
  drm/amd/display: Changed pipe split policy to allow for multi-display pipe split
  drm/amd/display: Set optimize_pwr_state for DCN31
  ...
2022-01-10 12:58:46 -08:00
Linus Torvalds
ca1a46d6f5 slab changes for 5.17
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Merge tag 'slab-for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab

Pull slab updates from Vlastimil Babka:

 - Separate struct slab from struct page - an offshot of the page folio
   work.

   Struct page fields used by slab allocators are moved from struct page
   to a new struct slab, that uses the same physical storage. Similar to
   struct folio, it always is a head page. This brings better type
   safety, separation of large kmalloc allocations from true slabs, and
   cleanup of related objcg code.

 - A SLAB_MERGE_DEFAULT config optimization.

* tag 'slab-for-5.17' of git://git.kernel.org/pub/scm/linux/kernel/git/vbabka/slab: (33 commits)
  mm/slob: Remove unnecessary page_mapcount_reset() function call
  bootmem: Use page->index instead of page->freelist
  zsmalloc: Stop using slab fields in struct page
  mm/slub: Define struct slab fields for CONFIG_SLUB_CPU_PARTIAL only when enabled
  mm/slub: Simplify struct slab slabs field definition
  mm/sl*b: Differentiate struct slab fields by sl*b implementations
  mm/kfence: Convert kfence_guarded_alloc() to struct slab
  mm/kasan: Convert to struct folio and struct slab
  mm/slob: Convert SLOB to use struct slab and struct folio
  mm/memcg: Convert slab objcgs from struct page to struct slab
  mm: Convert struct page to struct slab in functions used by other subsystems
  mm/slab: Finish struct page to struct slab conversion
  mm/slab: Convert most struct page to struct slab by spatch
  mm/slab: Convert kmem_getpages() and kmem_freepages() to struct slab
  mm/slub: Finish struct page to struct slab conversion
  mm/slub: Convert most struct page to struct slab by spatch
  mm/slub: Convert pfmemalloc_match() to take a struct slab
  mm/slub: Convert __free_slab() to use struct slab
  mm/slub: Convert alloc_slab_page() to return a struct slab
  mm/slub: Convert print_page_info() to print_slab_info()
  ...
2022-01-10 11:58:12 -08:00
Linus Torvalds
d93aebbd76 Merge branch 'random-5.17-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random
Pull random number generator updates from Jason Donenfeld:
 "These a bit more numerous than usual for the RNG, due to folks
  resubmitting patches that had been pending prior and generally renewed
  interest.

  There are a few categories of patches in here:

   1) Dominik Brodowski and I traded a series back and forth for a some
      weeks that fixed numerous issues related to seeds being provided
      at extremely early boot by the firmware, before other parts of the
      kernel or of the RNG have been initialized, both fixing some
      crashes and addressing correctness around early boot randomness.
      One of these is marked for stable.

   2) I replaced the RNG's usage of SHA-1 with BLAKE2s in the entropy
      extractor, and made the construction a bit safer and more
      standard. This was sort of a long overdue low hanging fruit, as we
      were supposed to have phased out SHA-1 usage quite some time ago
      (even if all we needed here was non-invertibility). Along the way
      it also made extraction 131% faster. This required a bit of
      Kconfig and symbol plumbing to make things work well with the
      crypto libraries, which is one of the reasons why I'm sending you
      this pull early in the cycle.

   3) I got rid of a truly superfluous call to RDRAND in the hot path,
      which resulted in a whopping 370% increase in performance.

   4) Sebastian Andrzej Siewior sent some patches regarding PREEMPT_RT,
      the full series of which wasn't ready yet, but the first two
      preparatory cleanups were good on their own. One of them touches
      files in kernel/irq/, which is the other reason why I'm sending
      you this pull early in the cycle.

   5) Other assorted correctness fixes from Eric Biggers, Jann Horn,
      Mark Brown, Dominik Brodowski, and myself"

* 'random-5.17-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
  random: don't reset crng_init_cnt on urandom_read()
  random: avoid superfluous call to RDRAND in CRNG extraction
  random: early initialization of ChaCha constants
  random: use IS_ENABLED(CONFIG_NUMA) instead of ifdefs
  random: harmonize "crng init done" messages
  random: mix bootloader randomness into pool
  random: do not throw away excess input to crng_fast_load
  random: do not re-init if crng_reseed completes before primary init
  random: fix crash on multiple early calls to add_bootloader_randomness()
  random: do not sign extend bytes for rotation when mixing
  random: use BLAKE2s instead of SHA1 in extraction
  lib/crypto: blake2s: include as built-in
  random: fix data race on crng init time
  random: fix data race on crng_node_pool
  irq: remove unused flags argument from __handle_irq_event_percpu()
  random: remove unused irq_flags argument from add_interrupt_randomness()
  random: document add_hwgenerator_randomness() with other input functions
  MAINTAINERS: add git tree for random.c
2022-01-10 11:52:16 -08:00
Linus Torvalds
7e740ae635 - First part of a series to move the AMD address translation code from
arch/x86/ to amd64_edac as that is its only user anyway
 
 - Some MCE error injection improvements to the AMD side
 
 - Reorganization of the #MC handler code and the facilities it calls to
 make it noinstr-safe
 
 - Add support for new AMD MCA bank types and non-uniform banks layout
 
 - The usual set of cleanups and fixes
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Merge tag 'ras_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull RAS updates from Borislav Petkov:
 "A relatively big amount of movements in RAS-land this time around:

   - First part of a series to move the AMD address translation code
     from arch/x86/ to amd64_edac as that is its only user anyway

   - Some MCE error injection improvements to the AMD side

   - Reorganization of the #MC handler code and the facilities it calls
     to make it noinstr-safe

   - Add support for new AMD MCA bank types and non-uniform banks layout

   - The usual set of cleanups and fixes"

* tag 'ras_core_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
  x86/mce: Reduce number of machine checks taken during recovery
  x86/mce/inject: Avoid out-of-bounds write when setting flags
  x86/MCE/AMD, EDAC/mce_amd: Support non-uniform MCA bank type enumeration
  x86/MCE/AMD, EDAC/mce_amd: Add new SMCA bank types
  x86/mce: Check regs before accessing it
  x86/mce: Mark mce_start() noinstr
  x86/mce: Mark mce_timed_out() noinstr
  x86/mce: Move the tainting outside of the noinstr region
  x86/mce: Mark mce_read_aux() noinstr
  x86/mce: Mark mce_end() noinstr
  x86/mce: Mark mce_panic() noinstr
  x86/mce: Prevent severity computation from being instrumented
  x86/mce: Allow instrumentation during task work queueing
  x86/mce: Remove noinstr annotation from mce_setup()
  x86/mce: Use mce_rdmsrl() in severity checking code
  x86/mce: Remove function-local cpus variables
  x86/mce: Do not use memset to clear the banks bitmaps
  x86/mce/inject: Set the valid bit in MCA_STATUS before error injection
  x86/mce/inject: Check if a bank is populated before injecting
  x86/mce: Get rid of cpu_missing
  ...
2022-01-10 11:43:09 -08:00
Linus Torvalds
48a60bdb2b - Add a set of thread_info.flags accessors which snapshot it before
accesing it in order to prevent any potential data races, and convert
 all users to those new accessors
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Merge tag 'core_entry_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull thread_info flag accessor helper updates from Borislav Petkov:
 "Add a set of thread_info.flags accessors which snapshot it before
  accesing it in order to prevent any potential data races, and convert
  all users to those new accessors"

* tag 'core_entry_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  powerpc: Snapshot thread flags
  powerpc: Avoid discarding flags in system_call_exception()
  openrisc: Snapshot thread flags
  microblaze: Snapshot thread flags
  arm64: Snapshot thread flags
  ARM: Snapshot thread flags
  alpha: Snapshot thread flags
  sched: Snapshot thread flags
  entry: Snapshot thread flags
  x86: Snapshot thread flags
  thread_info: Add helpers to snapshot thread flags
2022-01-10 11:34:10 -08:00
Linus Torvalds
133d9c53c9 - Remove -nostdlib compiler flag now that the vDSO uses the linker
instead of the compiler driver to link files
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Merge tag 'x86_vdso_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 vdso updates from Borislav Petkov:
 "Remove -nostdlib compiler flag now that the vDSO uses the linker
  instead of the compiler driver to link files"

* tag 'x86_vdso_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/purgatory: Remove -nostdlib compiler flag
  x86/vdso: Remove -nostdlib compiler flag
2022-01-10 10:20:15 -08:00
Linus Torvalds
3c6d405666 - A fix for cross-compiling the compressed stub on arm64 with clang
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Merge tag 'x86_build_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 build fix from Borislav Petkov:
 "A fix for cross-compiling the compressed stub on arm64 with clang"

* tag 'x86_build_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/boot/compressed: Move CLANG_FLAGS to beginning of KBUILD_CFLAGS
2022-01-10 10:18:58 -08:00
Linus Torvalds
25f8c7785e - Enable the short string copies for CPUs which support them, in
copy_user_enhanced_fast_string()
 
 - Avoid writing MSR_CSTAR on Intel due to TDX guests raising a #VE trap
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Merge tag 'x86_cpu_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cpuid updates from Borislav Petkov:

 - Enable the short string copies for CPUs which support them, in
   copy_user_enhanced_fast_string()

 - Avoid writing MSR_CSTAR on Intel due to TDX guests raising a #VE trap

* tag 'x86_cpu_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/lib: Add fast-short-rep-movs check to copy_user_enhanced_fast_string()
  x86/cpu: Don't write CSTAR MSR on Intel CPUs
2022-01-10 10:09:22 -08:00
Linus Torvalds
308319e990 - The mandatory set of random minor cleanups all over tip
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Merge tag 'x86_cleanups_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Pull x86 cleanups from Borislav Petkov:
 "The mandatory set of random minor cleanups all over tip"

* tag 'x86_cleanups_for_v5.17_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/events/amd/iommu: Remove redundant assignment to variable shift
  x86/boot/string: Add missing function prototypes
  x86/fpu: Remove duplicate copy_fpstate_to_sigframe() prototype
  x86/uaccess: Move variable into switch case statement
2022-01-10 10:02:27 -08:00