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Tue, 29 Apr 2025 22:42:19 -0700 (PDT) X-Google-Smtp-Source: AGHT+IG/2rRziMqV7exhtrwhKlwQtmufkCV9nFsAwejZ6czk2oG8bIJh878e13vez0tndZIUCamZFg== X-Received: by 2002:a17:90b:3d84:b0:309:f5c6:4c5c with SMTP id 98e67ed59e1d1-30a34450c14mr2039752a91.25.1745991738750; Tue, 29 Apr 2025 22:42:18 -0700 (PDT) Received: from [192.168.68.51] ([180.233.125.65]) by smtp.gmail.com with ESMTPSA id 98e67ed59e1d1-30a34a60882sm624669a91.45.2025.04.29.22.42.11 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Tue, 29 Apr 2025 22:42:18 -0700 (PDT) Message-ID: Date: Wed, 30 Apr 2025 15:42:09 +1000 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v8 08/43] kvm: arm64: Don't expose debug capabilities for realm guests To: Steven Price , kvm@vger.kernel.org, kvmarm@lists.linux.dev Cc: Suzuki K Poulose , Catalin Marinas , Marc Zyngier , Will Deacon , James Morse , Oliver Upton , Zenghui Yu , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Joey Gouly , Alexandru Elisei , Christoffer Dall , Fuad Tabba , linux-coco@lists.linux.dev, Ganapatrao Kulkarni , Shanker Donthineni , Alper Gun , "Aneesh Kumar K . V" References: <20250416134208.383984-1-steven.price@arm.com> <20250416134208.383984-9-steven.price@arm.com> Content-Language: en-US From: Gavin Shan In-Reply-To: <20250416134208.383984-9-steven.price@arm.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 4/16/25 11:41 PM, Steven Price wrote: > From: Suzuki K Poulose > > RMM v1.0 provides no mechanism for the host to perform debug operations > on the guest. So don't expose KVM_CAP_SET_GUEST_DEBUG and report 0 > breakpoints and 0 watch points. > > Signed-off-by: Suzuki K Poulose > Signed-off-by: Steven Price > --- > Changes since v7: > * Remove the helper functions and inline the kvm_is_realm() check with > a ternary operator. > * Rewrite the commit message to explain this patch. > --- > arch/arm64/kvm/arm.c | 8 +++++--- > 1 file changed, 5 insertions(+), 3 deletions(-) > Reviewed-by: Gavin Shan