ef16b2dff4
Add a new ucall hook, GUEST_UCALL_NONE(), to allow tests to make ucalls without allocating a ucall struct, and use it to enable single-step in ARM's debug-exceptions test. Like the disable single-step path, the enabling path also needs to ensure that no exclusive access sequences are attempted after enabling single-step, as the exclusive monitor is cleared on ERET from the debug exception taken to EL2. The test currently "works" because clear_bit() isn't actually an atomic operation... yet. Signed-off-by: Sean Christopherson <seanjc@google.com> Message-Id: <20221119013450.2643007-4-seanjc@google.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* tools/testing/selftests/kvm/include/kvm_util.h
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*
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* Copyright (C) 2018, Google LLC.
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*/
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#ifndef SELFTEST_KVM_UCALL_COMMON_H
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#define SELFTEST_KVM_UCALL_COMMON_H
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#include "test_util.h"
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/* Common ucalls */
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enum {
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UCALL_NONE,
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UCALL_SYNC,
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UCALL_ABORT,
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UCALL_DONE,
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UCALL_UNHANDLED,
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};
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#define UCALL_MAX_ARGS 7
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struct ucall {
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uint64_t cmd;
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uint64_t args[UCALL_MAX_ARGS];
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/* Host virtual address of this struct. */
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struct ucall *hva;
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};
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void ucall_arch_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa);
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void ucall_arch_do_ucall(vm_vaddr_t uc);
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void *ucall_arch_get_ucall(struct kvm_vcpu *vcpu);
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void ucall(uint64_t cmd, int nargs, ...);
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uint64_t get_ucall(struct kvm_vcpu *vcpu, struct ucall *uc);
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void ucall_init(struct kvm_vm *vm, vm_paddr_t mmio_gpa);
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/*
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* Perform userspace call without any associated data. This bare call avoids
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* allocating a ucall struct, which can be useful if the atomic operations in
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* the full ucall() are problematic and/or unwanted. Note, this will come out
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* as UCALL_NONE on the backend.
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*/
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#define GUEST_UCALL_NONE() ucall_arch_do_ucall((vm_vaddr_t)NULL)
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#define GUEST_SYNC_ARGS(stage, arg1, arg2, arg3, arg4) \
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ucall(UCALL_SYNC, 6, "hello", stage, arg1, arg2, arg3, arg4)
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#define GUEST_SYNC(stage) ucall(UCALL_SYNC, 2, "hello", stage)
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#define GUEST_DONE() ucall(UCALL_DONE, 0)
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enum guest_assert_builtin_args {
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GUEST_ERROR_STRING,
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GUEST_FILE,
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GUEST_LINE,
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GUEST_ASSERT_BUILTIN_NARGS
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};
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#define __GUEST_ASSERT(_condition, _condstr, _nargs, _args...) \
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do { \
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if (!(_condition)) \
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ucall(UCALL_ABORT, GUEST_ASSERT_BUILTIN_NARGS + _nargs, \
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"Failed guest assert: " _condstr, \
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__FILE__, __LINE__, ##_args); \
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} while (0)
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#define GUEST_ASSERT(_condition) \
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__GUEST_ASSERT(_condition, #_condition, 0, 0)
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#define GUEST_ASSERT_1(_condition, arg1) \
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__GUEST_ASSERT(_condition, #_condition, 1, (arg1))
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#define GUEST_ASSERT_2(_condition, arg1, arg2) \
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__GUEST_ASSERT(_condition, #_condition, 2, (arg1), (arg2))
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#define GUEST_ASSERT_3(_condition, arg1, arg2, arg3) \
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__GUEST_ASSERT(_condition, #_condition, 3, (arg1), (arg2), (arg3))
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#define GUEST_ASSERT_4(_condition, arg1, arg2, arg3, arg4) \
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__GUEST_ASSERT(_condition, #_condition, 4, (arg1), (arg2), (arg3), (arg4))
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#define GUEST_ASSERT_EQ(a, b) __GUEST_ASSERT((a) == (b), #a " == " #b, 2, a, b)
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#define __REPORT_GUEST_ASSERT(_ucall, fmt, _args...) \
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TEST_FAIL("%s at %s:%ld\n" fmt, \
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(const char *)(_ucall).args[GUEST_ERROR_STRING], \
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(const char *)(_ucall).args[GUEST_FILE], \
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(_ucall).args[GUEST_LINE], \
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##_args)
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#define GUEST_ASSERT_ARG(ucall, i) ((ucall).args[GUEST_ASSERT_BUILTIN_NARGS + i])
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#define REPORT_GUEST_ASSERT(ucall) \
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__REPORT_GUEST_ASSERT((ucall), "")
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#define REPORT_GUEST_ASSERT_1(ucall, fmt) \
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__REPORT_GUEST_ASSERT((ucall), \
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fmt, \
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GUEST_ASSERT_ARG((ucall), 0))
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#define REPORT_GUEST_ASSERT_2(ucall, fmt) \
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__REPORT_GUEST_ASSERT((ucall), \
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fmt, \
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GUEST_ASSERT_ARG((ucall), 0), \
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GUEST_ASSERT_ARG((ucall), 1))
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#define REPORT_GUEST_ASSERT_3(ucall, fmt) \
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__REPORT_GUEST_ASSERT((ucall), \
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fmt, \
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GUEST_ASSERT_ARG((ucall), 0), \
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GUEST_ASSERT_ARG((ucall), 1), \
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GUEST_ASSERT_ARG((ucall), 2))
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#define REPORT_GUEST_ASSERT_4(ucall, fmt) \
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__REPORT_GUEST_ASSERT((ucall), \
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fmt, \
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GUEST_ASSERT_ARG((ucall), 0), \
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GUEST_ASSERT_ARG((ucall), 1), \
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GUEST_ASSERT_ARG((ucall), 2), \
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GUEST_ASSERT_ARG((ucall), 3))
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#define REPORT_GUEST_ASSERT_N(ucall, fmt, args...) \
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__REPORT_GUEST_ASSERT((ucall), fmt, ##args)
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#endif /* SELFTEST_KVM_UCALL_COMMON_H */
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