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Fri, 07 Aug 2026 09:43:51 -0700 (PDT) Date: Fri, 7 Aug 2026 16:43:19 +0000 In-Reply-To: <20260807164322.2970811-2-sebastianene@google.com> Mime-Version: 1.0 References: <20260807164322.2970811-2-sebastianene@google.com> X-Mailer: git-send-email 2.55.0.654.g21b8a5bc05-goog Message-ID: <20260807164322.2970811-11-sebastianene@google.com> Subject: [PATCH v2 09/13] KVM: arm64: Trap & emulate the ITS MAPC command From: Sebastian Ene To: catalin.marinas@arm.com, fuad.tabba@linux.dev, joey.gouly@arm.com, mark.rutland@arm.com, maz@kernel.org, oupton@kernel.org, rananta@google.com, Sascha.Bischoff@arm.com, suzuki.poulose@arm.com, will@kernel.org Cc: kvmarm@lists.linux.dev, android-kvm@google.com, bgrzesik@google.com, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, nathan@kernel.org, perlarsen@google.com, sebastianene@google.com, seiden@linux.ibm.com, smostafa@google.com, tglx@kernel.org, vdonnefort@google.com, vladimir.murzin@arm.com, yuzenghui@huawei.com, zenghui.yu@linux.dev Content-Type: text/plain; charset="UTF-8" X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260807_094354_369036_CFA49CE9 X-CRM114-Status: GOOD ( 10.78 ) 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 collection table. 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 071a08d3602d..5629e2a070df 100644 --- a/arch/arm64/kvm/hyp/nvhe/its_emulate.c +++ b/arch/arm64/kvm/hyp/nvhe/its_emulate.c @@ -332,6 +332,13 @@ static int process_its_mapd(struct its_priv_state *its, struct its_cmd_block *cm return track_pfn(its, device_id, itt_pfn, num_pages, remove); } +static int process_its_mapc(struct its_priv_state *its, struct its_cmd_block *cmd, bool rollback) +{ + u32 icid = cmd->raw_cmd[2] & GENMASK(15, 0); + + return check_table_update(its, icid, GITS_BASER_TYPE_COLLECTION, rollback); +} + static int process_cmd(struct its_priv_state *its, struct its_cmd_block *cmd, bool rollback) { @@ -342,6 +349,10 @@ static int process_cmd(struct its_priv_state *its, struct its_cmd_block *cmd, case GITS_CMD_MAPD: ret = process_its_mapd(its, cmd, rollback); break; + + case GITS_CMD_MAPC: + ret = process_its_mapc(its, cmd, rollback); + break; default: /* Passthrough everything for now */ break; -- 2.55.0.654.g21b8a5bc05-goog