// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2017 - Columbia University and Linaro Ltd. * Author: Jintack Lim <jintack.lim@linaro.org> */ #include <linux/kvm.h> #include <linux/kvm_host.h> #include <asm/kvm_emulate.h> #include <asm/kvm_nested.h> #include <asm/sysreg.h> #include "sys_regs.h" /* Protection against the sysreg repainting madness... */ #define NV_FTR(r, f) ID_AA64##r##_EL1_##f /* * Our emulated CPU doesn't support all the possible features. For the * sake of simplicity (and probably mental sanity), wipe out a number * of feature bits we don't intend to support for the time being. * This list should get updated as new features get added to the NV * support, and new extension to the architecture. */ static u64 limit_nv_id_reg(u32 id, u64 val) { u64 tmp; switch (id) { case SYS_ID_AA64ISAR0_EL1: /* Support everything but TME, O.S. and Range TLBIs */ val &= ~(NV_FTR(ISAR0, TLB) | NV_FTR(ISAR0, TME)); break; case SYS_ID_AA64ISAR1_EL1: /* Support everything but Spec Invalidation */ val &= ~(GENMASK_ULL(63, 56) | NV_FTR(ISAR1, SPECRES)); break; case SYS_ID_AA64PFR0_EL1: /* No AMU, MPAM, S-EL2, RAS or SVE */ val &= ~(GENMASK_ULL(55, 52) | NV_FTR(PFR0, AMU) | NV_FTR(PFR0, MPAM) | NV_FTR(PFR0, SEL2) | NV_FTR(PFR0, RAS) | NV_FTR(PFR0, SVE) | NV_FTR(PFR0, EL3) | NV_FTR(PFR0, EL2) | NV_FTR(PFR0, EL1)); /* 64bit EL1/EL2/EL3 only */ val |= FIELD_PREP(NV_FTR(PFR0, EL1), 0b0001); val |= FIELD_PREP(NV_FTR(PFR0, EL2), 0b0001); val |= FIELD_PREP(NV_FTR(PFR0, EL3), 0b0001); break; case SYS_ID_AA64PFR1_EL1: /* Only support BTI, SSBS, CSV2_frac */ val &= (NV_FTR(PFR1, BT) | NV_FTR(PFR1, SSBS) | NV_FTR(PFR1, CSV2_frac)); break; case SYS_ID_AA64MMFR0_EL1: /* Hide ECV, ExS, Secure Memory */ val &= ~(NV_FTR(MMFR0, ECV) | NV_FTR(MMFR0, EXS) | NV_FTR(MMFR0, TGRAN4_2) | NV_FTR(MMFR0, TGRAN16_2) | NV_FTR(MMFR0, TGRAN64_2) | NV_FTR(MMFR0, SNSMEM)); /* Disallow unsupported S2 page sizes */ switch (PAGE_SIZE) { case SZ_64K: val |= FIELD_PREP(NV_FTR(MMFR0, TGRAN16_2), 0b0001); fallthrough; case SZ_16K: val |= FIELD_PREP(NV_FTR(MMFR0, TGRAN4_2), 0b0001); fallthrough; case SZ_4K: /* Support everything */ break; } /* * Since we can't support a guest S2 page size smaller than * the host's own page size (due to KVM only populating its * own S2 using the kernel's page size), advertise the * limitation using FEAT_GTG. */ switch (PAGE_SIZE) { case SZ_4K: val |= FIELD_PREP(NV_FTR(MMFR0, TGRAN4_2), 0b0010); fallthrough; case SZ_16K: val |= FIELD_PREP(NV_FTR(MMFR0, TGRAN16_2), 0b0010); fallthrough; case SZ_64K: val |= FIELD_PREP(NV_FTR(MMFR0, TGRAN64_2), 0b0010); break; } /* Cap PARange to 48bits */ tmp = FIELD_GET(NV_FTR(MMFR0, PARANGE), val); if (tmp > 0b0101) { val &= ~NV_FTR(MMFR0, PARANGE); val |= FIELD_PREP(NV_FTR(MMFR0, PARANGE), 0b0101); } break; case SYS_ID_AA64MMFR1_EL1: val &= (NV_FTR(MMFR1, HCX) | NV_FTR(MMFR1, PAN) | NV_FTR(MMFR1, LO) | NV_FTR(MMFR1, HPDS) | NV_FTR(MMFR1, VH) | NV_FTR(MMFR1, VMIDBits)); break; case SYS_ID_AA64MMFR2_EL1: val &= ~(NV_FTR(MMFR2, BBM) | NV_FTR(MMFR2, TTL) | GENMASK_ULL(47, 44) | NV_FTR(MMFR2, ST) | NV_FTR(MMFR2, CCIDX) | NV_FTR(MMFR2, VARange)); /* Force TTL support */ val |= FIELD_PREP(NV_FTR(MMFR2, TTL), 0b0001); break; case SYS_ID_AA64MMFR4_EL1: val = 0; if (!cpus_have_final_cap(ARM64_HAS_HCR_NV1)) val |= FIELD_PREP(NV_FTR(MMFR4, E2H0), ID_AA64MMFR4_EL1_E2H0_NI_NV1); break; case SYS_ID_AA64DFR0_EL1: /* Only limited support for PMU, Debug, BPs and WPs */ val &= (NV_FTR(DFR0, PMUVer) | NV_FTR(DFR0, WRPs) | NV_FTR(DFR0, BRPs) | NV_FTR(DFR0, DebugVer)); /* Cap Debug to ARMv8.1 */ tmp = FIELD_GET(NV_FTR(DFR0, DebugVer), val); if (tmp > 0b0111) { val &= ~NV_FTR(DFR0, DebugVer); val |= FIELD_PREP(NV_FTR(DFR0, DebugVer), 0b0111); } break; default: /* Unknown register, just wipe it clean */ val = 0; break; } return val; } u64 kvm_vcpu_sanitise_vncr_reg(const struct kvm_vcpu *vcpu, enum vcpu_sysreg sr) { u64 v = ctxt_sys_reg(&vcpu->arch.ctxt, sr); struct kvm_sysreg_masks *masks; masks = vcpu->kvm->arch.sysreg_masks; if (masks) { sr -= __VNCR_START__; v &= ~masks->mask[sr].res0; v |= masks->mask[sr].res1; } return v; } static void set_sysreg_masks(struct kvm *kvm, int sr, u64 res0, u64 res1) { int i = sr - __VNCR_START__; kvm->arch.sysreg_masks->mask[i].res0 = res0; kvm->arch.sysreg_masks->mask[i].res1 = res1; } int kvm_init_nv_sysregs(struct kvm *kvm) { u64 res0, res1; int ret = 0; mutex_lock(&kvm->arch.config_lock); if (kvm->arch.sysreg_masks) goto out; kvm->arch.sysreg_masks = kzalloc(sizeof(*(kvm->arch.sysreg_masks)), GFP_KERNEL); if (!kvm->arch.sysreg_masks) { ret = -ENOMEM; goto out; } for (int i = 0; i < KVM_ARM_ID_REG_NUM; i++) kvm->arch.id_regs[i] = limit_nv_id_reg(IDX_IDREG(i), kvm->arch.id_regs[i]); /* VTTBR_EL2 */ res0 = res1 = 0; if (!kvm_has_feat_enum(kvm, ID_AA64MMFR1_EL1, VMIDBits, 16)) res0 |= GENMASK(63, 56); if (!kvm_has_feat(kvm, ID_AA64MMFR2_EL1, CnP, IMP)) res0 |= VTTBR_CNP_BIT; set_sysreg_masks(kvm, VTTBR_EL2, res0, res1); /* VTCR_EL2 */ res0 = GENMASK(63, 32) | GENMASK(30, 20); res1 = BIT(31); set_sysreg_masks(kvm, VTCR_EL2, res0, res1); /* VMPIDR_EL2 */ res0 = GENMASK(63, 40) | GENMASK(30, 24); res1 = BIT(31); set_sysreg_masks(kvm, VMPIDR_EL2, res0, res1); /* HCR_EL2 */ res0 = BIT(48); res1 = HCR_RW; if (!kvm_has_feat(kvm, ID_AA64MMFR1_EL1, TWED, IMP)) res0 |= GENMASK(63, 59); if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, MTE, MTE2)) res0 |= (HCR_TID5 | HCR_DCT | HCR_ATA); if (!kvm_has_feat(kvm, ID_AA64MMFR2_EL1, EVT, TTLBxS)) res0 |= (HCR_TTLBIS | HCR_TTLBOS); if (!kvm_has_feat(kvm, ID_AA64PFR0_EL1, CSV2, CSV2_2) && !kvm_has_feat(kvm, ID_AA64PFR1_EL1, CSV2_frac, CSV2_1p2)) res0 |= HCR_ENSCXT; if (!kvm_has_feat(kvm, ID_AA64MMFR2_EL1, EVT, IMP)) res0 |= (HCR_TOCU | HCR_TICAB | HCR_TID4); if (!kvm_has_feat(kvm, ID_AA64PFR0_EL1, AMU, V1P1)) res0 |= HCR_AMVOFFEN; if (!kvm_has_feat(kvm, ID_AA64PFR0_EL1, RAS, V1P1)) res0 |= HCR_FIEN; if (!kvm_has_feat(kvm, ID_AA64MMFR2_EL1, FWB, IMP)) res0 |= HCR_FWB; if (!kvm_has_feat(kvm, ID_AA64MMFR2_EL1, NV, NV2)) res0 |= HCR_NV2; if (!kvm_has_feat(kvm, ID_AA64MMFR2_EL1, NV, IMP)) res0 |= (HCR_AT | HCR_NV1 | HCR_NV); if (!(__vcpu_has_feature(&kvm->arch, KVM_ARM_VCPU_PTRAUTH_ADDRESS) && __vcpu_has_feature(&kvm->arch, KVM_ARM_VCPU_PTRAUTH_GENERIC))) res0 |= (HCR_API | HCR_APK); if (!kvm_has_feat(kvm, ID_AA64ISAR0_EL1, TME, IMP)) res0 |= BIT(39); if (!kvm_has_feat(kvm, ID_AA64PFR0_EL1, RAS, IMP)) res0 |= (HCR_TEA | HCR_TERR); if (!kvm_has_feat(kvm, ID_AA64MMFR1_EL1, LO, IMP)) res0 |= HCR_TLOR; if (!kvm_has_feat(kvm, ID_AA64MMFR4_EL1, E2H0, IMP)) res1 |= HCR_E2H; set_sysreg_masks(kvm, HCR_EL2, res0, res1); /* HCRX_EL2 */ res0 = HCRX_EL2_RES0; res1 = HCRX_EL2_RES1; if (!kvm_has_feat(kvm, ID_AA64ISAR3_EL1, PACM, TRIVIAL_IMP)) res0 |= HCRX_EL2_PACMEn; if (!kvm_has_feat(kvm, ID_AA64PFR2_EL1, FPMR, IMP)) res0 |= HCRX_EL2_EnFPM; if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, GCS, IMP)) res0 |= HCRX_EL2_GCSEn; if (!kvm_has_feat(kvm, ID_AA64ISAR2_EL1, SYSREG_128, IMP)) res0 |= HCRX_EL2_EnIDCP128; if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, ADERR, DEV_ASYNC)) res0 |= (HCRX_EL2_EnSDERR | HCRX_EL2_EnSNERR); if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, DF2, IMP)) res0 |= HCRX_EL2_TMEA; if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, D128, IMP)) res0 |= HCRX_EL2_D128En; if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, THE, IMP)) res0 |= HCRX_EL2_PTTWI; if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, SCTLRX, IMP)) res0 |= HCRX_EL2_SCTLR2En; if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, TCRX, IMP)) res0 |= HCRX_EL2_TCR2En; if (!kvm_has_feat(kvm, ID_AA64ISAR2_EL1, MOPS, IMP)) res0 |= (HCRX_EL2_MSCEn | HCRX_EL2_MCE2); if (!kvm_has_feat(kvm, ID_AA64MMFR1_EL1, CMOW, IMP)) res0 |= HCRX_EL2_CMOW; if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, NMI, IMP)) res0 |= (HCRX_EL2_VFNMI | HCRX_EL2_VINMI | HCRX_EL2_TALLINT); if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, SME, IMP) || !(read_sysreg_s(SYS_SMIDR_EL1) & SMIDR_EL1_SMPS)) res0 |= HCRX_EL2_SMPME; if (!kvm_has_feat(kvm, ID_AA64ISAR1_EL1, XS, IMP)) res0 |= (HCRX_EL2_FGTnXS | HCRX_EL2_FnXS); if (!kvm_has_feat(kvm, ID_AA64ISAR1_EL1, LS64, LS64_V)) res0 |= HCRX_EL2_EnASR; if (!kvm_has_feat(kvm, ID_AA64ISAR1_EL1, LS64, LS64)) res0 |= HCRX_EL2_EnALS; if (!kvm_has_feat(kvm, ID_AA64ISAR1_EL1, LS64, LS64_ACCDATA)) res0 |= HCRX_EL2_EnAS0; set_sysreg_masks(kvm, HCRX_EL2, res0, res1); /* HFG[RW]TR_EL2 */ res0 = res1 = 0; if (!(__vcpu_has_feature(&kvm->arch, KVM_ARM_VCPU_PTRAUTH_ADDRESS) && __vcpu_has_feature(&kvm->arch, KVM_ARM_VCPU_PTRAUTH_GENERIC))) res0 |= (HFGxTR_EL2_APDAKey | HFGxTR_EL2_APDBKey | HFGxTR_EL2_APGAKey | HFGxTR_EL2_APIAKey | HFGxTR_EL2_APIBKey); if (!kvm_has_feat(kvm, ID_AA64MMFR1_EL1, LO, IMP)) res0 |= (HFGxTR_EL2_LORC_EL1 | HFGxTR_EL2_LOREA_EL1 | HFGxTR_EL2_LORID_EL1 | HFGxTR_EL2_LORN_EL1 | HFGxTR_EL2_LORSA_EL1); if (!kvm_has_feat(kvm, ID_AA64PFR0_EL1, CSV2, CSV2_2) && !kvm_has_feat(kvm, ID_AA64PFR1_EL1, CSV2_frac, CSV2_1p2)) res0 |= (HFGxTR_EL2_SCXTNUM_EL1 | HFGxTR_EL2_SCXTNUM_EL0); if (!kvm_has_feat(kvm, ID_AA64PFR0_EL1, GIC, IMP)) res0 |= HFGxTR_EL2_ICC_IGRPENn_EL1; if (!kvm_has_feat(kvm, ID_AA64PFR0_EL1, RAS, IMP)) res0 |= (HFGxTR_EL2_ERRIDR_EL1 | HFGxTR_EL2_ERRSELR_EL1 | HFGxTR_EL2_ERXFR_EL1 | HFGxTR_EL2_ERXCTLR_EL1 | HFGxTR_EL2_ERXSTATUS_EL1 | HFGxTR_EL2_ERXMISCn_EL1 | HFGxTR_EL2_ERXPFGF_EL1 | HFGxTR_EL2_ERXPFGCTL_EL1 | HFGxTR_EL2_ERXPFGCDN_EL1 | HFGxTR_EL2_ERXADDR_EL1); if (!kvm_has_feat(kvm, ID_AA64ISAR1_EL1, LS64, LS64_ACCDATA)) res0 |= HFGxTR_EL2_nACCDATA_EL1; if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, GCS, IMP)) res0 |= (HFGxTR_EL2_nGCS_EL0 | HFGxTR_EL2_nGCS_EL1); if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, SME, IMP)) res0 |= (HFGxTR_EL2_nSMPRI_EL1 | HFGxTR_EL2_nTPIDR2_EL0); if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, THE, IMP)) res0 |= HFGxTR_EL2_nRCWMASK_EL1; if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, S1PIE, IMP)) res0 |= (HFGxTR_EL2_nPIRE0_EL1 | HFGxTR_EL2_nPIR_EL1); if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, S1POE, IMP)) res0 |= (HFGxTR_EL2_nPOR_EL0 | HFGxTR_EL2_nPOR_EL1); if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, S2POE, IMP)) res0 |= HFGxTR_EL2_nS2POR_EL1; if (!kvm_has_feat(kvm, ID_AA64MMFR3_EL1, AIE, IMP)) res0 |= (HFGxTR_EL2_nMAIR2_EL1 | HFGxTR_EL2_nAMAIR2_EL1); set_sysreg_masks(kvm, HFGRTR_EL2, res0 | __HFGRTR_EL2_RES0, res1); set_sysreg_masks(kvm, HFGWTR_EL2, res0 | __HFGWTR_EL2_RES0, res1); /* HDFG[RW]TR_EL2 */ res0 = res1 = 0; if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, DoubleLock, IMP)) res0 |= HDFGRTR_EL2_OSDLR_EL1; if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, PMUVer, IMP)) res0 |= (HDFGRTR_EL2_PMEVCNTRn_EL0 | HDFGRTR_EL2_PMEVTYPERn_EL0 | HDFGRTR_EL2_PMCCFILTR_EL0 | HDFGRTR_EL2_PMCCNTR_EL0 | HDFGRTR_EL2_PMCNTEN | HDFGRTR_EL2_PMINTEN | HDFGRTR_EL2_PMOVS | HDFGRTR_EL2_PMSELR_EL0 | HDFGRTR_EL2_PMMIR_EL1 | HDFGRTR_EL2_PMUSERENR_EL0 | HDFGRTR_EL2_PMCEIDn_EL0); if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, PMSVer, IMP)) res0 |= (HDFGRTR_EL2_PMBLIMITR_EL1 | HDFGRTR_EL2_PMBPTR_EL1 | HDFGRTR_EL2_PMBSR_EL1 | HDFGRTR_EL2_PMSCR_EL1 | HDFGRTR_EL2_PMSEVFR_EL1 | HDFGRTR_EL2_PMSFCR_EL1 | HDFGRTR_EL2_PMSICR_EL1 | HDFGRTR_EL2_PMSIDR_EL1 | HDFGRTR_EL2_PMSIRR_EL1 | HDFGRTR_EL2_PMSLATFR_EL1 | HDFGRTR_EL2_PMBIDR_EL1); if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, TraceVer, IMP)) res0 |= (HDFGRTR_EL2_TRC | HDFGRTR_EL2_TRCAUTHSTATUS | HDFGRTR_EL2_TRCAUXCTLR | HDFGRTR_EL2_TRCCLAIM | HDFGRTR_EL2_TRCCNTVRn | HDFGRTR_EL2_TRCID | HDFGRTR_EL2_TRCIMSPECn | HDFGRTR_EL2_TRCOSLSR | HDFGRTR_EL2_TRCPRGCTLR | HDFGRTR_EL2_TRCSEQSTR | HDFGRTR_EL2_TRCSSCSRn | HDFGRTR_EL2_TRCSTATR | HDFGRTR_EL2_TRCVICTLR); if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, TraceBuffer, IMP)) res0 |= (HDFGRTR_EL2_TRBBASER_EL1 | HDFGRTR_EL2_TRBIDR_EL1 | HDFGRTR_EL2_TRBLIMITR_EL1 | HDFGRTR_EL2_TRBMAR_EL1 | HDFGRTR_EL2_TRBPTR_EL1 | HDFGRTR_EL2_TRBSR_EL1 | HDFGRTR_EL2_TRBTRG_EL1); if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, BRBE, IMP)) res0 |= (HDFGRTR_EL2_nBRBIDR | HDFGRTR_EL2_nBRBCTL | HDFGRTR_EL2_nBRBDATA); if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, PMSVer, V1P2)) res0 |= HDFGRTR_EL2_nPMSNEVFR_EL1; set_sysreg_masks(kvm, HDFGRTR_EL2, res0 | HDFGRTR_EL2_RES0, res1); /* Reuse the bits from the read-side and add the write-specific stuff */ if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, PMUVer, IMP)) res0 |= (HDFGWTR_EL2_PMCR_EL0 | HDFGWTR_EL2_PMSWINC_EL0); if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, TraceVer, IMP)) res0 |= HDFGWTR_EL2_TRCOSLAR; if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, TraceFilt, IMP)) res0 |= HDFGWTR_EL2_TRFCR_EL1; set_sysreg_masks(kvm, HFGWTR_EL2, res0 | HDFGWTR_EL2_RES0, res1); /* HFGITR_EL2 */ res0 = HFGITR_EL2_RES0; res1 = HFGITR_EL2_RES1; if (!kvm_has_feat(kvm, ID_AA64ISAR1_EL1, DPB, DPB2)) res0 |= HFGITR_EL2_DCCVADP; if (!kvm_has_feat(kvm, ID_AA64MMFR1_EL1, PAN, PAN2)) res0 |= (HFGITR_EL2_ATS1E1RP | HFGITR_EL2_ATS1E1WP); if (!kvm_has_feat(kvm, ID_AA64ISAR0_EL1, TLB, OS)) res0 |= (HFGITR_EL2_TLBIRVAALE1OS | HFGITR_EL2_TLBIRVALE1OS | HFGITR_EL2_TLBIRVAAE1OS | HFGITR_EL2_TLBIRVAE1OS | HFGITR_EL2_TLBIVAALE1OS | HFGITR_EL2_TLBIVALE1OS | HFGITR_EL2_TLBIVAAE1OS | HFGITR_EL2_TLBIASIDE1OS | HFGITR_EL2_TLBIVAE1OS | HFGITR_EL2_TLBIVMALLE1OS); if (!kvm_has_feat(kvm, ID_AA64ISAR0_EL1, TLB, RANGE)) res0 |= (HFGITR_EL2_TLBIRVAALE1 | HFGITR_EL2_TLBIRVALE1 | HFGITR_EL2_TLBIRVAAE1 | HFGITR_EL2_TLBIRVAE1 | HFGITR_EL2_TLBIRVAALE1IS | HFGITR_EL2_TLBIRVALE1IS | HFGITR_EL2_TLBIRVAAE1IS | HFGITR_EL2_TLBIRVAE1IS | HFGITR_EL2_TLBIRVAALE1OS | HFGITR_EL2_TLBIRVALE1OS | HFGITR_EL2_TLBIRVAAE1OS | HFGITR_EL2_TLBIRVAE1OS); if (!kvm_has_feat(kvm, ID_AA64ISAR1_EL1, SPECRES, IMP)) res0 |= (HFGITR_EL2_CFPRCTX | HFGITR_EL2_DVPRCTX | HFGITR_EL2_CPPRCTX); if (!kvm_has_feat(kvm, ID_AA64DFR0_EL1, BRBE, IMP)) res0 |= (HFGITR_EL2_nBRBINJ | HFGITR_EL2_nBRBIALL); if (!kvm_has_feat(kvm, ID_AA64PFR1_EL1, GCS, IMP)) res0 |= (HFGITR_EL2_nGCSPUSHM_EL1 | HFGITR_EL2_nGCSSTR_EL1 | HFGITR_EL2_nGCSEPP); if (!kvm_has_feat(kvm, ID_AA64ISAR1_EL1, SPECRES, COSP_RCTX)) res0 |= HFGITR_EL2_COSPRCTX; if (!kvm_has_feat(kvm, ID_AA64ISAR2_EL1, ATS1A, IMP)) res0 |= HFGITR_EL2_ATS1E1A; set_sysreg_masks(kvm, HFGITR_EL2, res0, res1); /* HAFGRTR_EL2 - not a lot to see here */ res0 = HAFGRTR_EL2_RES0; res1 = HAFGRTR_EL2_RES1; if (!kvm_has_feat(kvm, ID_AA64PFR0_EL1, AMU, V1P1)) res0 |= ~(res0 | res1); set_sysreg_masks(kvm, HAFGRTR_EL2, res0, res1); out: mutex_unlock(&kvm->arch.config_lock); return ret; }