Commit 1095b326 authored by Marc Zyngier's avatar Marc Zyngier Committed by Oliver Upton
Browse files

KVM: arm64: Make RVBAR_EL2 accesses UNDEF 



We always expose a virtual CPU that has EL3 when NV is enabled,
irrespective of EL3 being actually implemented in HW.

Therefore, as per the architecture, RVBAR_EL2 must UNDEF, since
EL2 is not the highest implemented exception level. This is
consistent with RMR_EL2 also triggering an UNDEF.

Adjust the handling of RVBAR_EL2 accordingly.

Signed-off-by: default avatarMarc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250714122634.3334816-2-maz@kernel.org


Signed-off-by: default avatarOliver Upton <oliver.upton@linux.dev>
parent 86731a2a

arch/arm64/kvm/sys_regs.c

+1 −2
Original line number Diff line number Diff line
@@ -108,7 +108,6 @@ static bool get_el2_to_el1_mapping(unsigned int reg, 
		PURE_EL2_SYSREG(  HACR_EL2	);

		PURE_EL2_SYSREG(  VTTBR_EL2	);

		PURE_EL2_SYSREG(  VTCR_EL2	);

		PURE_EL2_SYSREG(  RVBAR_EL2	);

		PURE_EL2_SYSREG(  TPIDR_EL2	);

		PURE_EL2_SYSREG(  HPFAR_EL2	);

		PURE_EL2_SYSREG(  HCRX_EL2	);
@@ -3370,7 +3369,7 @@ static const struct sys_reg_desc sys_reg_descs[] = { 
	{ SYS_DESC(SYS_MPAMVPM7_EL2), undef_access },



	EL2_REG(VBAR_EL2, access_rw, reset_val, 0),

	EL2_REG(RVBAR_EL2, access_rw, reset_val, 0),

	{ SYS_DESC(SYS_RVBAR_EL2), undef_access },

	{ SYS_DESC(SYS_RMR_EL2), undef_access },



	EL2_REG_VNCR(ICH_AP0R0_EL2, reset_val, 0),