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([49.142.96.162]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23de43227acsm65559485ad.124.2025.07.12.06.55.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 12 Jul 2025 06:55:20 -0700 (PDT) From: daeroro X-Google-Original-From: daeroro To: will@kernel.org Cc: alexandru.elisei@arm.com, james.morse@arm.com, kernel-team@android.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, maz@kernel.org, oliver.upton@linux.dev, qperret@google.com, sebastianene@google.com, sudeep.holla@arm.com, suzuki.poulose@arm.com, tabba@google.com Subject: [QUESTION] KVM: arm64: Handle FFA_MEM_LEND calls from the host Date: Sat, 12 Jul 2025 22:55:13 +0900 Message-Id: <20250712135513.608609-1-skseofh@naver.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230523101828.7328-9-will@kernel.org> References: <20230523101828.7328-9-will@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250712_065522_597446_DF9D6A31 X-CRM114-Status: UNSURE ( 8.16 ) X-CRM114-Notice: Please train this message. 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 > Handle FFA_MEM_LEND calls from the host by treating them identically to > FFA_MEM_SHARE calls for the purposes of the host stage-2 page-table, but > forwarding on the original request to EL3. Hello Will, I have a question about your patch. Does treating FFA_MEM_LEND as identical to FFA_MEM_SHARE imply that the host can still access the memory even after it has been 'lent'?