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[86.139.146.66]) by smtp.gmail.com with ESMTPSA id o5sm10909988wmb.8.2020.03.11.17.34.54 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Mar 2020 17:34:54 -0700 (PDT) From: Beata Michalska To: qemu-devel@nongnu.org Subject: [PATCH v3 1/2] target/arm: kvm: Inject events at the last stage of sync Date: Thu, 12 Mar 2020 00:34:00 +0000 Message-Id: <20200312003401.29017-2-beata.michalska@linaro.org> In-Reply-To: <20200312003401.29017-1-beata.michalska@linaro.org> References: <20200312003401.29017-1-beata.michalska@linaro.org> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2a00:1450:4864:20::342 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: peter.maydell@linaro.org, drjones@redhat.com, Christoffer.Dall@arm.com, qemu-arm@nongnu.org, pbonzini@redhat.com, kvmarm@lists.cs.columbia.edu Errors-To: qemu-devel-bounces+patch=linaro.org@nongnu.org Sender: "Qemu-devel" KVM_SET_VCPU_EVENTS might actually lead to vcpu registers being modified. As such this should be the last step of sync to avoid potential overwriting of whatever changes KVM might have done. Signed-off-by: Beata Michalska --- target/arm/kvm32.c | 15 ++++++++++----- target/arm/kvm64.c | 15 ++++++++++----- 2 files changed, 20 insertions(+), 10 deletions(-) -- 2.7.4 Reviewed-by: Andrew Jones diff --git a/target/arm/kvm32.c b/target/arm/kvm32.c index f703c4f..f271181 100644 --- a/target/arm/kvm32.c +++ b/target/arm/kvm32.c @@ -409,17 +409,22 @@ int kvm_arch_put_registers(CPUState *cs, int level) return ret; } - ret = kvm_put_vcpu_events(cpu); - if (ret) { - return ret; - } - write_cpustate_to_list(cpu, true); if (!write_list_to_kvmstate(cpu, level)) { return EINVAL; } + /* + * Setting VCPU events should be triggered after syncing the registers + * to avoid overwriting potential changes made by KVM upon calling + * KVM_SET_VCPU_EVENTS ioctl + */ + ret = kvm_put_vcpu_events(cpu); + if (ret) { + return ret; + } + kvm_arm_sync_mpstate_to_kvm(cpu); return ret; diff --git a/target/arm/kvm64.c b/target/arm/kvm64.c index 93ba144..be5b31c 100644 --- a/target/arm/kvm64.c +++ b/target/arm/kvm64.c @@ -1094,17 +1094,22 @@ int kvm_arch_put_registers(CPUState *cs, int level) return ret; } - ret = kvm_put_vcpu_events(cpu); - if (ret) { - return ret; - } - write_cpustate_to_list(cpu, true); if (!write_list_to_kvmstate(cpu, level)) { return -EINVAL; } + /* + * Setting VCPU events should be triggered after syncing the registers + * to avoid overwriting potential changes made by KVM upon calling + * KVM_SET_VCPU_EVENTS ioctl + */ + ret = kvm_put_vcpu_events(cpu); + if (ret) { + return ret; + } + kvm_arm_sync_mpstate_to_kvm(cpu); return ret;