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Tue, 10 Mar 2026 05:49:54 -0700 (PDT) Date: Tue, 10 Mar 2026 12:49:29 +0000 In-Reply-To: <20260310124933.830025-1-sebastianene@google.com> Mime-Version: 1.0 References: <20260310124933.830025-1-sebastianene@google.com> X-Mailer: git-send-email 2.53.0.473.g4a7958ca14-goog Message-ID: <20260310124933.830025-11-sebastianene@google.com> Subject: [PATCH 10/14] KVM: arm64: Trap & emulate the ITS MAPC command From: Sebastian Ene To: alexandru.elisei@arm.com, kvmarm@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, android-kvm@google.com Cc: catalin.marinas@arm.com, dbrazdil@google.com, joey.gouly@arm.com, kees@kernel.org, mark.rutland@arm.com, maz@kernel.org, oupton@kernel.org, perlarsen@google.com, qperret@google.com, rananta@google.com, sebastianene@google.com, smostafa@google.com, suzuki.poulose@arm.com, tabba@google.com, tglx@kernel.org, vdonnefort@google.com, bgrzesik@google.com, will@kernel.org, yuzenghui@huawei.com Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260310_054956_648487_01C8AA79 X-CRM114-Status: GOOD ( 11.52 ) 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 Parse the MAPC command and verify if we need to do any updates to the shadow if the collection table is configured with an indirect layout. Signed-off-by: Sebastian Ene --- arch/arm64/kvm/hyp/nvhe/its_emulate.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm64/kvm/hyp/nvhe/its_emulate.c b/arch/arm64/kvm/hyp/nvhe/its_emulate.c index 7049d307a236..4782a9a24caa 100644 --- a/arch/arm64/kvm/hyp/nvhe/its_emulate.c +++ b/arch/arm64/kvm/hyp/nvhe/its_emulate.c @@ -198,6 +198,13 @@ static int process_its_vmapp(struct its_priv_state *its, struct its_cmd_block *c return track_pfn(its, base_pfn, num_pages, remove); } +static int process_its_mapc(struct its_priv_state *its, struct its_cmd_block *cmd) +{ + u32 icid = cmd->raw_cmd[2] & GENMASK(15, 0); + + return check_table_update(its, icid, GITS_BASER_TYPE_COLLECTION); +} + static int parse_its_cmdq(struct its_priv_state *its, int offset, ssize_t len) { struct its_cmd_block *cmd = its->cmd_hyp_base + offset; @@ -215,6 +222,10 @@ static int parse_its_cmdq(struct its_priv_state *its, int offset, ssize_t len) case GITS_CMD_VMAPP: ret = process_its_vmapp(its, cmd); break; + + case GITS_CMD_MAPC: + ret = process_its_mapc(its, cmd); + break; } cmd++; -- 2.53.0.473.g4a7958ca14-goog