xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

KVM: add kvm_request_pending

Browse Source 
A first step in vcpu->requests encapsulation.  Additionally, we now
use READ_ONCE() when accessing vcpu->requests, which ensures we
always load vcpu->requests when it's accessed.  This is important as
other threads can change it any time.  Also, READ_ONCE() documents
that vcpu->requests is used with other threads, likely requiring
memory barriers, which it does.

Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
[ Documented the new use of READ_ONCE() and converted another check
  in arch/mips/kvm/vz.c ]
Signed-off-by: Andrew Jones <drjones@redhat.com>
Acked-by: Christoffer Dall <cdall@linaro.org>
Signed-off-by: Christoffer Dall <cdall@linaro.org>
This commit is contained in:
Radim Krčmář
2017-06-04 14:43:52 +02:00
committed by Christoffer Dall
parent 2387149ead
commit 2fa6e1e12a
7 changed files with 13 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
arch/mips/kvm/trap_emul.c
View File

@@ -1094,7 +1094,7 @@ static void kvm_trap_emul_check_requests(struct kvm_vcpu *vcpu, int cpu,
struct mm_struct *mm;
int i;
if (likely(!vcpu->requests))
if (likely(!kvm_request_pending(vcpu)))
return;
if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {

2
arch/mips/kvm/vz.c
View File

@@ -2337,7 +2337,7 @@ static int kvm_vz_check_requests(struct kvm_vcpu *vcpu, int cpu)
int ret = 0;
int i;
if (!vcpu->requests)
if (!kvm_request_pending(vcpu))
return 0;
if (kvm_check_request(KVM_REQ_TLB_FLUSH, vcpu)) {