diff options
Diffstat (limited to 'arch/arm64/kvm/hyp/include/nvhe/fixed_config.h')
| -rw-r--r-- | arch/arm64/kvm/hyp/include/nvhe/fixed_config.h | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/arch/arm64/kvm/hyp/include/nvhe/fixed_config.h b/arch/arm64/kvm/hyp/include/nvhe/fixed_config.h deleted file mode 100644 index 51f043649146..000000000000 --- a/arch/arm64/kvm/hyp/include/nvhe/fixed_config.h +++ /dev/null @@ -1,223 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-only */ -/* - * Copyright (C) 2021 Google LLC - * Author: Fuad Tabba <tabba@google.com> - */ - -#ifndef __ARM64_KVM_FIXED_CONFIG_H__ -#define __ARM64_KVM_FIXED_CONFIG_H__ - -#include <asm/sysreg.h> - -/* - * This file contains definitions for features to be allowed or restricted for - * guest virtual machines, depending on the mode KVM is running in and on the - * type of guest that is running. - * - * The ALLOW masks represent a bitmask of feature fields that are allowed - * without any restrictions as long as they are supported by the system. - * - * The RESTRICT_UNSIGNED masks, if present, represent unsigned fields for - * features that are restricted to support at most the specified feature. - * - * If a feature field is not present in either, than it is not supported. - * - * The approach taken for protected VMs is to allow features that are: - * - Needed by common Linux distributions (e.g., floating point) - * - Trivial to support, e.g., supporting the feature does not introduce or - * require tracking of additional state in KVM - * - Cannot be trapped or prevent the guest from using anyway - */ - -/* - * Allow for protected VMs: - * - Floating-point and Advanced SIMD - * - Data Independent Timing - * - Spectre/Meltdown Mitigation - */ -#define PVM_ID_AA64PFR0_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_FP) | \ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_AdvSIMD) | \ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_DIT) | \ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_CSV2) | \ - ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_CSV3) \ - ) - -/* - * Restrict to the following *unsigned* features for protected VMs: - * - AArch64 guests only (no support for AArch32 guests): - * AArch32 adds complexity in trap handling, emulation, condition codes, - * etc... - * - RAS (v1) - * Supported by KVM - */ -#define PVM_ID_AA64PFR0_RESTRICT_UNSIGNED (\ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_EL0), ID_AA64PFR0_EL1_ELx_64BIT_ONLY) | \ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_EL1), ID_AA64PFR0_EL1_ELx_64BIT_ONLY) | \ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_EL2), ID_AA64PFR0_EL1_ELx_64BIT_ONLY) | \ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_EL3), ID_AA64PFR0_EL1_ELx_64BIT_ONLY) | \ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64PFR0_EL1_RAS), ID_AA64PFR0_EL1_RAS_IMP) \ - ) - -/* - * Allow for protected VMs: - * - Branch Target Identification - * - Speculative Store Bypassing - */ -#define PVM_ID_AA64PFR1_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_BT) | \ - ARM64_FEATURE_MASK(ID_AA64PFR1_EL1_SSBS) \ - ) - -#define PVM_ID_AA64PFR2_ALLOW 0ULL - -/* - * Allow for protected VMs: - * - Mixed-endian - * - Distinction between Secure and Non-secure Memory - * - Mixed-endian at EL0 only - * - Non-context synchronizing exception entry and exit - */ -#define PVM_ID_AA64MMFR0_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_BIGEND) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_SNSMEM) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_BIGENDEL0) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_EXS) \ - ) - -/* - * Restrict to the following *unsigned* features for protected VMs: - * - 40-bit IPA - * - 16-bit ASID - */ -#define PVM_ID_AA64MMFR0_RESTRICT_UNSIGNED (\ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_PARANGE), ID_AA64MMFR0_EL1_PARANGE_40) | \ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64MMFR0_EL1_ASIDBITS), ID_AA64MMFR0_EL1_ASIDBITS_16) \ - ) - -/* - * Allow for protected VMs: - * - Hardware translation table updates to Access flag and Dirty state - * - Number of VMID bits from CPU - * - Hierarchical Permission Disables - * - Privileged Access Never - * - SError interrupt exceptions from speculative reads - * - Enhanced Translation Synchronization - * - Control for cache maintenance permission - */ -#define PVM_ID_AA64MMFR1_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_HAFDBS) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_VMIDBits) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_HPDS) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_PAN) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_SpecSEI) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_ETS) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR1_EL1_CMOW) \ - ) - -/* - * Allow for protected VMs: - * - Common not Private translations - * - User Access Override - * - IESB bit in the SCTLR_ELx registers - * - Unaligned single-copy atomicity and atomic functions - * - ESR_ELx.EC value on an exception by read access to feature ID space - * - TTL field in address operations. - * - Break-before-make sequences when changing translation block size - * - E0PDx mechanism - */ -#define PVM_ID_AA64MMFR2_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_CnP) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_UAO) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_IESB) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_AT) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_IDS) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_TTL) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_BBM) | \ - ARM64_FEATURE_MASK(ID_AA64MMFR2_EL1_E0PD) \ - ) - -#define PVM_ID_AA64MMFR3_ALLOW (0ULL) - -/* - * No support for Scalable Vectors for protected VMs: - * Requires additional support from KVM, e.g., context-switching and - * trapping at EL2 - */ -#define PVM_ID_AA64ZFR0_ALLOW (0ULL) - -/* - * No support for debug, including breakpoints, and watchpoints for protected - * VMs: - * The Arm architecture mandates support for at least the Armv8 debug - * architecture, which would include at least 2 hardware breakpoints and - * watchpoints. Providing that support to protected guests adds - * considerable state and complexity. Therefore, the reserved value of 0 is - * used for debug-related fields. - */ -#define PVM_ID_AA64DFR0_ALLOW (0ULL) -#define PVM_ID_AA64DFR1_ALLOW (0ULL) - -/* - * No support for implementation defined features. - */ -#define PVM_ID_AA64AFR0_ALLOW (0ULL) -#define PVM_ID_AA64AFR1_ALLOW (0ULL) - -/* - * No restrictions on instructions implemented in AArch64. - */ -#define PVM_ID_AA64ISAR0_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_AES) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SHA1) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SHA2) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_CRC32) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_ATOMIC) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_RDM) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SHA3) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SM3) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_SM4) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_DP) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_FHM) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_TS) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_TLB) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR0_EL1_RNDR) \ - ) - -/* Restrict pointer authentication to the basic version. */ -#define PVM_ID_AA64ISAR1_RESTRICT_UNSIGNED (\ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_APA), ID_AA64ISAR1_EL1_APA_PAuth) | \ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_API), ID_AA64ISAR1_EL1_API_PAuth) \ - ) - -#define PVM_ID_AA64ISAR2_RESTRICT_UNSIGNED (\ - FIELD_PREP(ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_APA3), ID_AA64ISAR2_EL1_APA3_PAuth) \ - ) - -#define PVM_ID_AA64ISAR1_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_DPB) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_JSCVT) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_FCMA) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_LRCPC) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_GPA) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_GPI) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_FRINTTS) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_SB) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_SPECRES) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_BF16) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_DGH) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR1_EL1_I8MM) \ - ) - -#define PVM_ID_AA64ISAR2_ALLOW (\ - ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_ATS1A)| \ - ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_GPA3) | \ - ARM64_FEATURE_MASK(ID_AA64ISAR2_EL1_MOPS) \ - ) - -u64 pvm_read_id_reg(const struct kvm_vcpu *vcpu, u32 id); -bool kvm_handle_pvm_sysreg(struct kvm_vcpu *vcpu, u64 *exit_code); -bool kvm_handle_pvm_restricted(struct kvm_vcpu *vcpu, u64 *exit_code); -int kvm_check_pvm_sysreg_table(void); - -#endif /* __ARM64_KVM_FIXED_CONFIG_H__ */ |