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KVM: arm64: Make RVBAR_EL2 accesses UNDEF

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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: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20250714122634.3334816-2-maz@kernel.org
Signed-off-by: Oliver Upton <oliver.upton@linux.dev>
This commit is contained in:
Marc Zyngier 2025-07-14 13:26:24 +01:00 committed by Oliver Upton
parent 86731a2a65
commit 1095b32665
1 changed files with 1 additions and 2 deletions
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3
arch/arm64/kvm/sys_regs.c
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@ -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),