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[175.34.8.244]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a6dcbdd97fsm8611158a91.0.2026.10.05.17.03.13 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 05 Oct 2026 17:03:21 -0700 (PDT) Message-ID: <7b196a7f-d31a-4acd-9f3f-a24c0e78db43@redhat.com> Date: Tue, 6 Oct 2026 10:03:11 +1000 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v22 02/23] KVM: arm64: Disable Steal time accounting for protected guests To: Suzuki K Poulose , kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: maz@kernel.org, will@kernel.org, catalin.marinas@arm.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, steven.price@arm.com, aneesh.kumar@kernel.org, oupton@kernel.org, joey.gouly@arm.com, tabba@google.com, yuzenghui@huawei.com, linux-coco@lists.linux.dev, gankulkarni@os.amperecomputing.com, sdonthineni@nvidia.com, alpergun@google.com, fj0570is@fujitsu.com, WeiLin.Chang@arm.com, lpieralisi@kernel.org, enju.kohei@fujitsu.com, sudeep.holla@arm.com, jonathan.cameron@oss.qualcomm.com, Fuad Tabba References: <20261005090754.2140522-1-suzuki.poulose@arm.com> <20261005090754.2140522-3-suzuki.poulose@arm.com> From: Gavin Shan In-Reply-To: <20261005090754.2140522-3-suzuki.poulose@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: zviGr2VHEsIJc-vsiRgnkCfi_Vhvbs98AGqeIubs5PM_1791245003 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20261005_170328_382245_3BA818FC X-CRM114-Status: GOOD ( 10.20 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 10/5/26 7:07 PM, Suzuki K Poulose wrote: > PVTIME support is advertised by KVM_CAP_STEAL_TIME, which doesn't take into > account the kvm instance. Even with that, a VMM could skip the CAP check > and proceed to configure the PVTIME as we don't do further check on the > DEVICE_CTRL. Tighten this up by passing the KVM instance around wherever > possible and catch things early. > > Reviewed-by: Fuad Tabba > Tested-by: Gavin Shan > Signed-off-by: Suzuki K Poulose > --- > arch/arm64/include/asm/kvm_host.h | 2 +- > arch/arm64/kvm/arm.c | 2 +- > arch/arm64/kvm/pvtime.c | 14 +++++++------- > 3 files changed, 9 insertions(+), 9 deletions(-) > Reviewed-by: Gavin Shan