| Message ID | 20230216160012.272345-7-kristina.martsenko@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | arm64: support Armv8.8 memcpy instructions in userspace | expand |
On Thu, Feb 16, 2023 at 04:00:08PM +0000, Kristina Martsenko wrote: > As FEAT_MOPS is not supported in guests yet, hide it from the ID > registers for guests. > > The MOPS instructions are UNDEFINED in guests as HCRX_EL2.MSCEn is not > set in HCRX_GUEST_FLAGS, and will take an exception to EL1 if executed. > > Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 0bc7df55916e..3456205c6b92 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1213,6 +1213,7 @@ static u64 read_id_reg(const struct kvm_vcpu *vcpu, struct sys_reg_desc const *r ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_GPA3)); if (!cpus_have_final_cap(ARM64_HAS_WFXT)) val &= ~ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_WFxT); + val &= ~ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_MOPS); break; case SYS_ID_AA64DFR0_EL1: /* Limit debug to ARMv8.0 */
As FEAT_MOPS is not supported in guests yet, hide it from the ID registers for guests. The MOPS instructions are UNDEFINED in guests as HCRX_EL2.MSCEn is not set in HCRX_GUEST_FLAGS, and will take an exception to EL1 if executed. Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> --- arch/arm64/kvm/sys_regs.c | 1 + 1 file changed, 1 insertion(+)