linux-kernel - [PATCH 11/11] KVM: arm64: expose FEAT

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Message-Id: <20250804121724.3681531-12-yeoreum.yun@arm.com>
Date: Mon,  4 Aug 2025 13:17:24 +0100
From: Yeoreum Yun <yeoreum.yun@....com>
To: catalin.marinas@....com,
	will@...nel.org,
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Cc: linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org,
	kvmarm@...ts.linux.dev,
	Yeoreum Yun <yeoreum.yun@....com>
Subject: [PATCH 11/11] KVM: arm64: expose FEAT_SCTLR2 feature to guest

expose FEAT_SCTLR2 feature to guest.

Signed-off-by: Yeoreum Yun <yeoreum.yun@....com>
---
 arch/arm64/kvm/sys_regs.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 24881b7248b5..3f82ef1a8eb0 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1644,8 +1644,8 @@ static u64 __kvm_read_sanitised_id_reg(const struct kvm_vcpu *vcpu,
 		val &= ~ID_AA64MMFR2_EL1_NV;
 		break;
 	case SYS_ID_AA64MMFR3_EL1:
-		val &= ID_AA64MMFR3_EL1_TCRX | ID_AA64MMFR3_EL1_S1POE |
-			ID_AA64MMFR3_EL1_S1PIE;
+		val &= ID_AA64MMFR3_EL1_TCRX | ID_AA64MMFR3_EL1_SCTLRX |
+			ID_AA64MMFR3_EL1_S1POE | ID_AA64MMFR3_EL1_S1PIE;
 		break;
 	case SYS_ID_MMFR4_EL1:
 		val &= ~ARM64_FEATURE_MASK(ID_MMFR4_EL1_CCIDX);
@@ -2961,6 +2961,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 					ID_AA64MMFR2_EL1_NV |
 					ID_AA64MMFR2_EL1_CCIDX)),
 	ID_WRITABLE(ID_AA64MMFR3_EL1, (ID_AA64MMFR3_EL1_TCRX	|
+				       ID_AA64MMFR3_EL1_SCTLRX  |
 				       ID_AA64MMFR3_EL1_S1PIE   |
 				       ID_AA64MMFR3_EL1_S1POE)),
 	ID_WRITABLE(ID_AA64MMFR4_EL1, ID_AA64MMFR4_EL1_NV_frac),
--
LEVI:{C3F47F37-75D8-414A-A8BA-3980EC8A46D7}