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KVM: mark requests that need synchronization

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kvm_make_all_requests() provides a synchronization that waits until all
kicked VCPUs have acknowledged the kick.  This is important for
KVM_REQ_MMU_RELOAD as it prevents freeing while lockless paging is
underway.

This patch adds the synchronization property into all requests that are
currently being used with kvm_make_all_requests() in order to preserve
the current behavior and only introduce a new framework.  Removing it
from requests where it is not necessary is left for future patches.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Paolo Bonzini
2017-04-27 14:33:43 +02:00
parent 178f02ffaf
commit 7a97cec26b
5 changed files with 32 additions and 12 deletions
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2
arch/arm64/include/asm/kvm_host.h
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@@ -41,7 +41,7 @@
#define KVM_VCPU_MAX_FEATURES 4
#define KVM_REQ_VCPU_EXIT (8 | KVM_REQUEST_NO_WAKEUP)
#define KVM_REQ_VCPU_EXIT (8 | KVM_REQUEST_WAIT | KVM_REQUEST_NO_WAKEUP)
int __attribute_const__ kvm_target_cpu(void);
int kvm_reset_vcpu(struct kvm_vcpu *vcpu);