Messages in this thread Patch in this message |  | | Date | Tue, 10 Mar 2026 12:49:29 +0000 | | Subject | [PATCH 10/14] KVM: arm64: Trap & emulate the ITS MAPC command | | From | Sebastian Ene <> |
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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 <sebastianene@google.com> --- 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
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