From: Marc Zyngier Date: Mon, 14 Jul 2025 12:26:24 +0000 (+0100) Subject: KVM: arm64: Make RVBAR_EL2 accesses UNDEF X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1095b32665cf1085d76fc1af283dc0bd3c986169;p=thirdparty%2Flinux.git 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: Marc Zyngier Link: https://lore.kernel.org/r/20250714122634.3334816-2-maz@kernel.org Signed-off-by: Oliver Upton --- diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 76c2f0da821f8..3f226cd5b502e 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -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),