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[34.34.145.44]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-47d7f4184cbsm53680785e9.6.2026.01.06.07.45.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Jan 2026 07:45:44 -0800 (PST) Date: Tue, 6 Jan 2026 15:45:40 +0000 From: Vincent Donnefort To: Will Deacon Cc: kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, Marc Zyngier , Oliver Upton , Joey Gouly , Suzuki K Poulose , Zenghui Yu , Catalin Marinas , Quentin Perret , Fuad Tabba , Mostafa Saleh Subject: Re: [PATCH 24/30] KVM: arm64: Implement the MEM_SHARE hypercall for protected VMs Message-ID: References: <20260105154939.11041-1-will@kernel.org> <20260105154939.11041-25-will@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260105154939.11041-25-will@kernel.org> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260106_074547_410866_85F2CFDB X-CRM114-Status: GOOD ( 11.47 ) 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 [...] > @@ -952,6 +1004,7 @@ bool kvm_handle_pvm_hvc64(struct kvm_vcpu *vcpu, u64 *exit_code) > case ARM_SMCCC_VENDOR_HYP_KVM_FEATURES_FUNC_ID: > val[0] = BIT(ARM_SMCCC_KVM_FUNC_FEATURES); > val[0] |= BIT(ARM_SMCCC_KVM_FUNC_HYP_MEMINFO); > + val[0] |= BIT(ARM_SMCCC_KVM_FUNC_MEM_SHARE); > break; > case ARM_SMCCC_VENDOR_HYP_KVM_HYP_MEMINFO_FUNC_ID: > if (smccc_get_arg1(vcpu) || > @@ -962,6 +1015,14 @@ bool kvm_handle_pvm_hvc64(struct kvm_vcpu *vcpu, u64 *exit_code) > > val[0] = PAGE_SIZE; > break; > + case ARM_SMCCC_VENDOR_HYP_KVM_MEM_SHARE_FUNC_ID: > + if (smccc_get_arg2(vcpu) || > + smccc_get_arg3(vcpu)) { > + break; > + } I wonder if that shouldn't go into pkvm_memshare_call(): that function has the knowledge of the argument content since we pass vcpu. Otherwise: Reviewed-by: Vincent Donnefort > + > + handled = pkvm_memshare_call(val, vcpu, exit_code); > + break; > default: > /* Punt everything else back to the host, for now. */ > handled = false; > -- > 2.52.0.351.gbe84eed79e-goog >