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[34.68.225.194]) by smtp.gmail.com with ESMTPSA id w11sm2661526ior.40.2021.11.04.09.10.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 04 Nov 2021 09:10:19 -0700 (PDT) Date: Thu, 4 Nov 2021 16:10:16 +0000 From: Oliver Upton To: Reiji Watanabe Cc: Marc Zyngier , kvmarm@lists.cs.columbia.edu, kvm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, James Morse , Alexandru Elisei , Suzuki K Poulose , Paolo Bonzini , Will Deacon , Andrew Jones , Peng Liang , Peter Shier , Ricardo Koller , Jing Zhang , Raghavendra Rao Anata Subject: Re: [RFC PATCH v2 01/28] KVM: arm64: Add has_reset_once flag for vcpu Message-ID: References: <20211103062520.1445832-1-reijiw@google.com> <20211103062520.1445832-2-reijiw@google.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20211103062520.1445832-2-reijiw@google.com> Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org On Tue, Nov 02, 2021 at 11:24:53PM -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 Reviewed-by: Oliver Upton > --- > 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; > } > > -- > 2.33.1.1089.g2158813163f-goog >