[PATCH v2 09/13] KVM: arm64: Trap & emulate the ITS MAPC command
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COLD21d
From: Sebastian Ene <hidden>
Date: 2026-08-07 16:43:53
Also in:
kvmarm, lkml
Subsystem:
arm64 port (aarch64 architecture), kernel virtual machine for arm64 (kvm/arm64), the rest · Maintainers:
Catalin Marinas, Will Deacon, Marc Zyngier, Oliver Upton, Linus Torvalds
Revision v2 of 2 in this series.
Revisions (2)
- rfc [diff vs current]
- v2 current
Parse the MAPC command and verify if we need to do any updates to the shadow collection table. Signed-off-by: Sebastian Ene <redacted> --- 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