KVM: x86: Drop current_vcpu for kvm_running_vcpu + kvm_arch_vcpu variable

Browse source

Use the generic kvm_running_vcpu plus a new 'handling_intr_from_guest'
variable in kvm_arch_vcpu instead of the semi-redundant current_vcpu.
kvm_before/after_interrupt() must be called while the vCPU is loaded,
(which protects against preemption), thus kvm_running_vcpu is guaranteed
to be non-NULL when handling_intr_from_guest is non-zero.

Switching to kvm_get_running_vcpu() will allows moving KVM's perf
callbacks to generic code, and the new flag will be used in a future
patch to more precisely identify the "NMI from guest" case.

Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Link: https://lore.kernel.org/r/20211111020738.2512932-11-seanjc@google.com

...

This commit is contained in:

Sean Christopherson 2021-11-11 02:07:31 +00:00 • committed by Peter Zijlstra

parent 87b940a067

commit 73cd107b96

4 changed files with 20 additions and 16 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

3

arch/x86/include/asm/kvm_host.h

View file

2

arch/x86/kvm/pmu.c

View file

23

arch/x86/kvm/x86.c

View file

10

arch/x86/kvm/x86.h

View file