KVM: arm64: Advertise support for FEAT_SCTLR2

Everything is in place to handle the additional state for SCTLR2_ELx,
which is all that FEAT_SCTLR2 implies.

Reviewed-by: Marc Zyngier <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Oliver Upton <[email protected]>

Author: oupton

arch/arm64/kvm/sys_regs.c

@@ -1644,8 +1644,10 @@ 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 +2963,7 @@ 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),