[PATCH v2 05/36] arm64/sysreg: Add GICR CDNMIA encoding

Sascha Bischoff Sascha.Bischoff at arm.com
Fri Dec 19 07:52:37 PST 2025


The encoding for the GICR CDNMIA system instruction is thus far unused
(and shall remain unused for the time being). However, in order to
plumb the FGTs into KVM correctly, KVM needs to be made aware of the
encoding of this system instruction.

Signed-off-by: Sascha Bischoff <sascha.bischoff at arm.com>
---
 arch/arm64/include/asm/sysreg.h | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index b3b8b8cd7bf1e..e99acb6dbd5d8 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -1059,6 +1059,7 @@
 #define GICV5_OP_GIC_CDPRI		sys_insn(1, 0, 12, 1, 2)
 #define GICV5_OP_GIC_CDRCFG		sys_insn(1, 0, 12, 1, 5)
 #define GICV5_OP_GICR_CDIA		sys_insn(1, 0, 12, 3, 0)
+#define GICV5_OP_GICR_CDNMIA		sys_insn(1, 0, 12, 3, 1)
 
 /* Definitions for GIC CDAFF */
 #define GICV5_GIC_CDAFF_IAFFID_MASK	GENMASK_ULL(47, 32)
@@ -1105,6 +1106,12 @@
 #define GICV5_GIC_CDIA_TYPE_MASK	GENMASK_ULL(31, 29)
 #define GICV5_GIC_CDIA_ID_MASK		GENMASK_ULL(23, 0)
 
+/* Definitions for GICR CDNMIA */
+#define GICV5_GIC_CDNMIA_VALID_MASK	BIT_ULL(32)
+#define GICV5_GICR_CDNMIA_VALID(r)	FIELD_GET(GICV5_GIC_CDNMIA_VALID_MASK, r)
+#define GICV5_GIC_CDNMIA_TYPE_MASK	GENMASK_ULL(31, 29)
+#define GICV5_GIC_CDNMIA_ID_MASK	GENMASK_ULL(23, 0)
+
 #define gicr_insn(insn)			read_sysreg_s(GICV5_OP_GICR_##insn)
 #define gic_insn(v, insn)		write_sysreg_s(v, GICV5_OP_GIC_##insn)
 
-- 
2.34.1



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