[PATCH 03/32] arm64/sysreg: Drop ICH_HFGRTR_EL2.ICC_HAPR_EL1 and make RES1

Sascha Bischoff Sascha.Bischoff at arm.com
Fri Dec 12 07:22:36 PST 2025


The GICv5 architecture is dropping the ICC_HAPR_EL1 and ICV_HAPR_EL1
system registers. These registers were never added to the sysregs, but
the traps for them were.

Drop the trap bit from the ICH_HFGRTR_EL2 and make it Res1 as per the
upcoming GICv5 spec change. Additionally, update the EL2 setup code to
not attempt to set that bit.

Signed-off-by: Sascha Bischoff <sascha.bischoff at arm.com>
---
 arch/arm64/include/asm/el2_setup.h | 1 -
 arch/arm64/tools/sysreg            | 2 +-
 2 files changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm64/include/asm/el2_setup.h b/arch/arm64/include/asm/el2_setup.h
index cacd20df1786e..07c12f4a69b41 100644
--- a/arch/arm64/include/asm/el2_setup.h
+++ b/arch/arm64/include/asm/el2_setup.h
@@ -225,7 +225,6 @@
 		     ICH_HFGRTR_EL2_ICC_ICSR_EL1		| \
 		     ICH_HFGRTR_EL2_ICC_PCR_EL1			| \
 		     ICH_HFGRTR_EL2_ICC_HPPIR_EL1		| \
-		     ICH_HFGRTR_EL2_ICC_HAPR_EL1		| \
 		     ICH_HFGRTR_EL2_ICC_CR0_EL1			| \
 		     ICH_HFGRTR_EL2_ICC_IDRn_EL1		| \
 		     ICH_HFGRTR_EL2_ICC_APR_EL1)
diff --git a/arch/arm64/tools/sysreg b/arch/arm64/tools/sysreg
index 8921b51866d64..dab5bfe8c9686 100644
--- a/arch/arm64/tools/sysreg
+++ b/arch/arm64/tools/sysreg
@@ -4579,7 +4579,7 @@ Field	7	ICC_IAFFIDR_EL1
 Field	6	ICC_ICSR_EL1
 Field	5	ICC_PCR_EL1
 Field	4	ICC_HPPIR_EL1
-Field	3	ICC_HAPR_EL1
+Res1	3
 Field	2	ICC_CR0_EL1
 Field	1	ICC_IDRn_EL1
 Field	0	ICC_APR_EL1
-- 
2.34.1



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