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| author | Radim Krčmář <rkrcmar@redhat.com> | 2017-04-26 23:32:22 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2017-04-27 15:13:57 +0300 |
| commit | 930f7fd6da77ed9476a538345513460fd304aaf5 (patch) | |
| tree | 8d8c53534dc4828e76e3d8daf4aea09a3cc4abe3 /arch/arm64/include/asm/kvm_host.h | |
| parent | 75aaafb79f73516b69d5639ad30a72d72e75c8b4 (diff) | |
| download | linux-930f7fd6da77ed9476a538345513460fd304aaf5.tar.xz | |
KVM: mark requests that do not need a wakeup
Some operations must ensure that the guest is not running with stale
data, but if the guest is halted, then the update can wait until another
event happens. kvm_make_all_requests() currently doesn't wake up, so we
can mark all requests used with it.
First 8 bits were arbitrarily reserved for request numbers.
Most uses of requests have the request type as a constant, so a compiler
will optimize the '&'.
An alternative would be to have an inline function that would return
whether the request needs a wake-up or not, but I like this one better
even though it might produce worse assembly.
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Reviewed-by: Andrew Jones <drjones@redhat.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/arm64/include/asm/kvm_host.h')
| -rw-r--r-- | arch/arm64/include/asm/kvm_host.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h index 522e4f60976e..1c9458a7ec92 100644 --- a/arch/arm64/include/asm/kvm_host.h +++ b/arch/arm64/include/asm/kvm_host.h @@ -41,7 +41,7 @@ #define KVM_VCPU_MAX_FEATURES 4 -#define KVM_REQ_VCPU_EXIT 8 +#define KVM_REQ_VCPU_EXIT (8 | KVM_REQUEST_NO_WAKEUP) int __attribute_const__ kvm_target_cpu(void); int kvm_reset_vcpu(struct kvm_vcpu *vcpu); |