On Mon, Oct 11, 2021 at 09:35:11PM -0700, Reiji Watanabe wrote: > Introduce 'has_reset_once' flag in kvm_vcpu_arch, which indicates > if the vCPU reset has been done once, for later use. > > Signed-off-by: Reiji Watanabe <[email protected]> > --- > arch/arm64/include/asm/kvm_host.h | 2 ++ > arch/arm64/kvm/reset.c | 4 ++++ > 2 files changed, 6 insertions(+) > > diff --git a/arch/arm64/include/asm/kvm_host.h > b/arch/arm64/include/asm/kvm_host.h > index f8be56d5342b..9b5e7a3b6011 100644 > --- a/arch/arm64/include/asm/kvm_host.h > +++ b/arch/arm64/include/asm/kvm_host.h > @@ -384,6 +384,7 @@ struct kvm_vcpu_arch { > u64 last_steal; > gpa_t base; > } steal; > + bool has_reset_once; > }; > > /* Pointer to the vcpu's SVE FFR for sve_{save,load}_state() */ > @@ -449,6 +450,7 @@ struct kvm_vcpu_arch { > > #define vcpu_has_sve(vcpu) (system_supports_sve() && \ > ((vcpu)->arch.flags & KVM_ARM64_GUEST_HAS_SVE)) > +#define vcpu_has_reset_once(vcpu) ((vcpu)->arch.has_reset_once) > > #ifdef CONFIG_ARM64_PTR_AUTH > #define vcpu_has_ptrauth(vcpu) > \ > diff --git a/arch/arm64/kvm/reset.c b/arch/arm64/kvm/reset.c > index 5ce36b0a3343..4d34e5c1586c 100644 > --- a/arch/arm64/kvm/reset.c > +++ b/arch/arm64/kvm/reset.c > @@ -305,6 +305,10 @@ int kvm_reset_vcpu(struct kvm_vcpu *vcpu) > if (loaded) > kvm_arch_vcpu_load(vcpu, smp_processor_id()); > preempt_enable(); > + > + if (!ret && !vcpu->arch.has_reset_once) > + vcpu->arch.has_reset_once = true; > + > return ret; > } > > -- > 2.33.0.882.g93a45727a2-goog >
Hi Reiji, Can't we use kvm_vcpu_initialized(vcpu)? vcpu->arch.target should only be >= when we've successfully reset the vcpu at least once. Thanks, drew _______________________________________________ kvmarm mailing list [email protected] https://lists.cs.columbia.edu/mailman/listinfo/kvmarm
