b1c3497e60
Implement support for the HVMOP_set_evtchn_upcall_vector hypercall in order to set the per-vCPU event channel vector callback on Linux and use it in preference of HVM_PARAM_CALLBACK_IRQ. If the per-VCPU vector setup is successful on BSP, use this method for the APs. If not, fallback to the global vector-type callback. Also register callback_irq at per-vCPU event channel setup to trick toolstack to think the domain is enlightened. Suggested-by: "Roger Pau Monné" <roger.pau@citrix.com> Signed-off-by: Jane Malalane <jane.malalane@citrix.com> Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Link: https://lore.kernel.org/r/20220729070416.23306-1-jane.malalane@citrix.com Signed-off-by: Juergen Gross <jgross@suse.com>
38 lines
860 B
C
38 lines
860 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_XEN_EVENTS_H
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#define _ASM_X86_XEN_EVENTS_H
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#include <xen/xen.h>
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enum ipi_vector {
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XEN_RESCHEDULE_VECTOR,
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XEN_CALL_FUNCTION_VECTOR,
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XEN_CALL_FUNCTION_SINGLE_VECTOR,
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XEN_SPIN_UNLOCK_VECTOR,
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XEN_IRQ_WORK_VECTOR,
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XEN_NMI_VECTOR,
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XEN_NR_IPIS,
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};
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static inline int xen_irqs_disabled(struct pt_regs *regs)
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{
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return raw_irqs_disabled_flags(regs->flags);
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}
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/* No need for a barrier -- XCHG is a barrier on x86. */
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#define xchg_xen_ulong(ptr, val) xchg((ptr), (val))
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extern bool xen_have_vector_callback;
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/*
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* Events delivered via platform PCI interrupts are always
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* routed to vcpu 0 and hence cannot be rebound.
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*/
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static inline bool xen_support_evtchn_rebind(void)
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{
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return (!xen_hvm_domain() || xen_have_vector_callback);
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}
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extern bool xen_percpu_upcall;
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#endif /* _ASM_X86_XEN_EVENTS_H */
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