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[175.34.8.244]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-3a0bec30aaasm16424179a91.15.2026.09.27.17.14.16 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 27 Sep 2026 17:14:22 -0700 (PDT) Message-ID: <5987866e-92b6-41d7-87a7-ca1dee2647af@redhat.com> Date: Mon, 28 Sep 2026 10:14:15 +1000 Precedence: bulk X-Mailing-List: linux-coco@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v19 02/20] 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, Fuad Tabba References: <20260920212845.707-1-suzuki.poulose@arm.com> <20260920212845.707-3-suzuki.poulose@arm.com> From: Gavin Shan In-Reply-To: <20260920212845.707-3-suzuki.poulose@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: n_4WB3Q4OB0tso4z7-9TkgAz2BTY4cRPAyDPFHbeA-o_1790554463 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 9/21/26 7:28 AM, 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 > 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