From e0bb80c62cfd0c289c841d35e412e633299530e3 Mon Sep 17 00:00:00 2001 From: Kristina Martsenko Date: Fri, 22 Sep 2023 12:25:08 +0100 Subject: KVM: arm64: Expose MOPS instructions to guests Expose the Armv8.8 FEAT_MOPS feature to guests in the ID register and allow the MOPS instructions to be run in a guest. Only expose MOPS if the whole system supports it. Note, it is expected that guests do not use these instructions on MMIO, similarly to other instructions where ESR_EL2.ISV==0 such as LDP/STP. Signed-off-by: Kristina Martsenko Reviewed-by: Marc Zyngier Link: https://lore.kernel.org/r/20230922112508.1774352-3-kristina.martsenko@arm.com Signed-off-by: Oliver Upton --- arch/arm64/kvm/sys_regs.c | 2 -- 1 file changed, 2 deletions(-) (limited to 'arch/arm64/kvm/sys_regs.c') diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c index 57c8190d5438..9601af2aa062 100644 --- a/arch/arm64/kvm/sys_regs.c +++ b/arch/arm64/kvm/sys_regs.c @@ -1344,7 +1344,6 @@ static u64 __kvm_read_sanitised_id_reg(const struct kvm_vcpu *vcpu, 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_AA64MMFR2_EL1: val &= ~ID_AA64MMFR2_EL1_CCIDX_MASK; @@ -2095,7 +2094,6 @@ static const struct sys_reg_desc sys_reg_descs[] = { ID_AA64ISAR1_EL1_API | ID_AA64ISAR1_EL1_APA)), ID_WRITABLE(ID_AA64ISAR2_EL1, ~(ID_AA64ISAR2_EL1_RES0 | - ID_AA64ISAR2_EL1_MOPS | ID_AA64ISAR2_EL1_APA3 | ID_AA64ISAR2_EL1_GPA3)), ID_UNALLOCATED(6,3), -- cgit v1.2.3