[PATCH v2 1/3] KVM: arm64: selftests: Add MOVI and MOVALL commands to the ITS library

[Fuad Tabba]

Add its_send_movi_cmd() and its_send_movall_cmd() for a test that moves
a pending LPI. MOVALL takes both redistributors as processor numbers,
as its_send_mapc_cmd() and its_send_sync_cmd() do, and the new
its_encode_target2() puts the second one in RDbase2, in the command's
fourth doubleword.

Assisted-by: LLM
Signed-off-by: Fuad Tabba <fuad.tabba at linux.dev>
---
 .../selftests/kvm/include/arm64/gic_v3_its.h  |  2 ++
 .../selftests/kvm/lib/arm64/gic_v3_its.c      | 28 +++++++++++++++++++
 2 files changed, 30 insertions(+)

diff --git a/tools/testing/selftests/kvm/include/arm64/gic_v3_its.h b/tools/testing/selftests/kvm/include/arm64/gic_v3_its.h
index a43a407e2d5c1..e30a658fbd1c3 100644
--- a/tools/testing/selftests/kvm/include/arm64/gic_v3_its.h
+++ b/tools/testing/selftests/kvm/include/arm64/gic_v3_its.h
@@ -14,6 +14,8 @@ void its_send_mapc_cmd(void *cmdq_base, u32 vcpu_id, u32 collection_id, bool val
 void its_send_mapti_cmd(void *cmdq_base, u32 device_id, u32 event_id,
 			u32 collection_id, u32 intid);
 void its_send_invall_cmd(void *cmdq_base, u32 collection_id);
+void its_send_movi_cmd(void *cmdq_base, u32 device_id, u32 event_id, u32 collection_id);
+void its_send_movall_cmd(void *cmdq_base, u32 from_vcpu, u32 to_vcpu);
 void its_send_sync_cmd(void *cmdq_base, u32 vcpu_id);
 
 #endif // __SELFTESTS_GIC_V3_ITS_H__
diff --git a/tools/testing/selftests/kvm/lib/arm64/gic_v3_its.c b/tools/testing/selftests/kvm/lib/arm64/gic_v3_its.c
index 1188b578121dd..811d858f5def6 100644
--- a/tools/testing/selftests/kvm/lib/arm64/gic_v3_its.c
+++ b/tools/testing/selftests/kvm/lib/arm64/gic_v3_its.c
@@ -159,6 +159,11 @@ static void its_encode_target(struct its_cmd_block *cmd, u64 target_addr)
 	its_mask_encode(&cmd->raw_cmd[2], target_addr >> 16, 51, 16);
 }
 
+static void its_encode_target2(struct its_cmd_block *cmd, u64 target_addr)
+{
+	its_mask_encode(&cmd->raw_cmd[3], target_addr >> 16, 51, 16);
+}
+
 static void its_encode_collection(struct its_cmd_block *cmd, u16 col)
 {
 	its_mask_encode(&cmd->raw_cmd[2], col, 15, 0);
@@ -253,6 +258,29 @@ void its_send_invall_cmd(void *cmdq_base, u32 collection_id)
 	its_send_cmd(cmdq_base, &cmd);
 }
 
+void its_send_movi_cmd(void *cmdq_base, u32 device_id, u32 event_id, u32 collection_id)
+{
+	struct its_cmd_block cmd = {};
+
+	its_encode_cmd(&cmd, GITS_CMD_MOVI);
+	its_encode_devid(&cmd, device_id);
+	its_encode_event_id(&cmd, event_id);
+	its_encode_collection(&cmd, collection_id);
+
+	its_send_cmd(cmdq_base, &cmd);
+}
+
+void its_send_movall_cmd(void *cmdq_base, u32 from_vcpu, u32 to_vcpu)
+{
+	struct its_cmd_block cmd = {};
+
+	its_encode_cmd(&cmd, GITS_CMD_MOVALL);
+	its_encode_target(&cmd, procnum_to_rdbase(from_vcpu));
+	its_encode_target2(&cmd, procnum_to_rdbase(to_vcpu));
+
+	its_send_cmd(cmdq_base, &cmd);
+}
+
 void its_send_sync_cmd(void *cmdq_base, u32 vcpu_id)
 {
 	struct its_cmd_block cmd = {};
-- 
2.39.5