diff options
| author | Lara Lazier <laramglazier@gmail.com> | 2021-07-21 17:26:50 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-07-22 14:44:47 +0200 |
| commit | 213ff024a2f92020290296cb9dc29c2af3d4a221 (patch) | |
| tree | 69b2dc0ab6ec8a12f6dd93bf8baa7ea2fa8f2fb5 /target/i386/cpu.h | |
| parent | b128b25a5a2b1a7db6965a6d3fd0e4f6f0affc50 (diff) | |
target/i386: Added consistency checks for CR4
All MBZ bits in CR4 must be zero. (APM2 15.5)
Added reserved bitmask and added checks in both
helper_vmrun and helper_write_crN.
Signed-off-by: Lara Lazier <laramglazier@gmail.com>
Message-Id: <20210721152651.14683-2-laramglazier@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'target/i386/cpu.h')
| -rw-r--r-- | target/i386/cpu.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/target/i386/cpu.h b/target/i386/cpu.h index 5d98a4e7c0..1f7e8d7f0a 100644 --- a/target/i386/cpu.h +++ b/target/i386/cpu.h @@ -240,6 +240,7 @@ typedef enum X86Seg { #define CR4_OSFXSR_SHIFT 9 #define CR4_OSFXSR_MASK (1U << CR4_OSFXSR_SHIFT) #define CR4_OSXMMEXCPT_MASK (1U << 10) +#define CR4_UMIP_MASK (1U << 11) #define CR4_LA57_MASK (1U << 12) #define CR4_VMXE_MASK (1U << 13) #define CR4_SMXE_MASK (1U << 14) @@ -251,6 +252,14 @@ typedef enum X86Seg { #define CR4_PKE_MASK (1U << 22) #define CR4_PKS_MASK (1U << 24) +#define CR4_RESERVED_MASK \ +(~(target_ulong)(CR4_VME_MASK | CR4_PVI_MASK | CR4_TSD_MASK \ + | CR4_DE_MASK | CR4_PSE_MASK | CR4_PAE_MASK \ + | CR4_MCE_MASK | CR4_PGE_MASK | CR4_PCE_MASK \ + | CR4_OSFXSR_MASK | CR4_OSXMMEXCPT_MASK |CR4_UMIP_MASK \ + | CR4_FSGSBASE_MASK | CR4_PCIDE_MASK | CR4_OSXSAVE_MASK \ + | CR4_SMEP_MASK | CR4_SMAP_MASK | CR4_PKE_MASK | CR4_PKS_MASK)) + #define DR6_BD (1 << 13) #define DR6_BS (1 << 14) #define DR6_BT (1 << 15) @@ -2196,6 +2205,36 @@ static inline bool hyperv_feat_enabled(X86CPU *cpu, int feat) return !!(cpu->hyperv_features & BIT(feat)); } +static inline uint64_t cr4_reserved_bits(CPUX86State *env) +{ + uint64_t reserved_bits = CR4_RESERVED_MASK; + if (!env->features[FEAT_XSAVE]) { + reserved_bits |= CR4_OSXSAVE_MASK; + } + if (!(env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_SMEP)) { + reserved_bits |= CR4_SMEP_MASK; + } + if (!(env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_SMAP)) { + reserved_bits |= CR4_SMAP_MASK; + } + if (!(env->features[FEAT_7_0_EBX] & CPUID_7_0_EBX_FSGSBASE)) { + reserved_bits |= CR4_FSGSBASE_MASK; + } + if (!(env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_PKU)) { + reserved_bits |= CR4_PKE_MASK; + } + if (!(env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_LA57)) { + reserved_bits |= CR4_LA57_MASK; + } + if (!(env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_UMIP)) { + reserved_bits |= CR4_UMIP_MASK; + } + if (!(env->features[FEAT_7_0_ECX] & CPUID_7_0_ECX_PKS)) { + reserved_bits |= CR4_PKS_MASK; + } + return reserved_bits; +} + #if defined(TARGET_X86_64) && \ defined(CONFIG_USER_ONLY) && \ defined(CONFIG_LINUX) |