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X-Received-From: 2607:f8b0:400c:c08::244 Subject: [Qemu-devel] [PATCH v2 08/13] hvf: implement hvf_get_supported_cpuid X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sergio Andres Gomez Del Real Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: "Qemu-devel" X-Virus-Scanned: ClamAV using ClamSMTP This commit implements hvf_get_supported_cpuid, which returns the set of features supported by both the host processor and the hypervisor. Signed-off-by: Sergio Andres Gomez Del Real --- target/i386/hvf-utils/x86_cpuid.c | 138 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 138 insertions(+) diff --git a/target/i386/hvf-utils/x86_cpuid.c b/target/i386/hvf-utils/x86_cpuid.c index 5d63bca8fd..6d405cd9dd 100644 --- a/target/i386/hvf-utils/x86_cpuid.c +++ b/target/i386/hvf-utils/x86_cpuid.c @@ -24,6 +24,7 @@ #include "x86_cpuid.h" #include "x86.h" #include "vmx.h" +#include "sysemu/hvf.h" #define PPRO_FEATURES (CPUID_FP87 | CPUID_DE | CPUID_PSE | CPUID_TSC | \ CPUID_MSR | CPUID_MCE | CPUID_CX8 | CPUID_PGE | CPUID_CMOV | \ @@ -94,6 +95,27 @@ struct x86_cpuid builtin_cpus[] = { static struct x86_cpuid *_cpuid; +static uint64_t xgetbv(uint32_t xcr) +{ + uint32_t eax, edx; + + __asm__ volatile ("xgetbv" + : "=a" (eax), "=d" (edx) + : "c" (xcr)); + + return (((uint64_t)edx) << 32) | eax; +} + +static bool vmx_mpx_supported() +{ + uint64_t cap_exit, cap_entry; + + hv_vmx_read_capability(HV_VMX_CAP_ENTRY, &cap_entry); + hv_vmx_read_capability(HV_VMX_CAP_EXIT, &cap_exit); + + return ((cap_exit & (1 << 23)) && (cap_entry & (1 << 16))); +} + void init_cpuid(struct CPUState *cpu) { _cpuid = &builtin_cpus[2]; /* core2duo */ @@ -277,3 +299,119 @@ void get_cpuid_func(struct CPUState *cpu, int func, int cnt, uint32_t *eax, break; } } + +uint32_t hvf_get_supported_cpuid(uint32_t func, uint32_t idx, + int reg) +{ + uint64_t cap; + uint32_t eax, ebx, ecx, edx; + + host_cpuid(func, idx, &eax, &ebx, &ecx, &edx); + + switch (func) { + case 0: + eax = eax < (uint32_t)0xd ? eax : (uint32_t)0xd; + break; + case 1: + edx &= CPUID_FP87 | CPUID_VME | CPUID_DE | CPUID_PSE | CPUID_TSC | + CPUID_MSR | CPUID_PAE | CPUID_MCE | CPUID_CX8 | CPUID_APIC | + CPUID_SEP | CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | + CPUID_PAT | CPUID_PSE36 | CPUID_CLFLUSH | CPUID_MMX | + CPUID_FXSR | CPUID_SSE | CPUID_SSE2 | CPUID_SS; + ecx &= CPUID_EXT_SSE3 | CPUID_EXT_PCLMULQDQ | CPUID_EXT_SSSE3 | + CPUID_EXT_FMA | CPUID_EXT_CX16 | CPUID_EXT_PCID | + CPUID_EXT_SSE41 | CPUID_EXT_SSE42 | CPUID_EXT_MOVBE | + CPUID_EXT_POPCNT | CPUID_EXT_AES | CPUID_EXT_XSAVE | + CPUID_EXT_AVX | CPUID_EXT_F16C | CPUID_EXT_RDRAND; + break; + case 6: + eax = 4; + ebx = 0; + ecx = 0; + edx = 0; + break; + case 7: + if (idx == 0) { + ebx &= CPUID_7_0_EBX_FSGSBASE | CPUID_7_0_EBX_BMI1 | + CPUID_7_0_EBX_HLE | CPUID_7_0_EBX_AVX2 | + CPUID_7_0_EBX_SMEP | CPUID_7_0_EBX_BMI2 | + CPUID_7_0_EBX_ERMS | CPUID_7_0_EBX_RTM | + CPUID_7_0_EBX_RDSEED | CPUID_7_0_EBX_ADX | + CPUID_7_0_EBX_SMAP | CPUID_7_0_EBX_AVX512IFMA | + CPUID_7_0_EBX_AVX512F | CPUID_7_0_EBX_AVX512PF | + CPUID_7_0_EBX_AVX512ER | CPUID_7_0_EBX_AVX512CD | + CPUID_7_0_EBX_CLFLUSHOPT | CPUID_7_0_EBX_CLWB | + CPUID_7_0_EBX_AVX512DQ | CPUID_7_0_EBX_SHA_NI | + CPUID_7_0_EBX_AVX512BW | CPUID_7_0_EBX_AVX512VL | + CPUID_7_0_EBX_INVPCID | CPUID_7_0_EBX_MPX; + + if (!vmx_mpx_supported()) { + ebx &= ~CPUID_7_0_EBX_MPX; + } + hv_vmx_read_capability(HV_VMX_CAP_PROCBASED2, &cap); + if (!(cap & CPU_BASED2_INVPCID)) { + ebx &= ~CPUID_7_0_EBX_INVPCID; + } + + ecx &= CPUID_7_0_ECX_AVX512BMI | CPUID_7_0_ECX_AVX512_VPOPCNTDQ; + edx &= CPUID_7_0_EDX_AVX512_4VNNIW | CPUID_7_0_EDX_AVX512_4FMAPS; + } else { + ebx = 0; + ecx = 0; + edx = 0; + } + eax = 0; + break; + case 0xD: + if (idx == 0) { + uint64_t host_xcr0 = xgetbv(0); + uint64_t supp_xcr0 = host_xcr0 & (XSTATE_FP_MASK | XSTATE_SSE_MASK | + XSTATE_YMM_MASK | XSTATE_BNDREGS_MASK | + XSTATE_BNDCSR_MASK | XSTATE_OPMASK_MASK | + XSTATE_ZMM_Hi256_MASK | XSTATE_Hi16_ZMM_MASK); + eax &= supp_xcr0; + if (!vmx_mpx_supported()) { + eax &= ~(XSTATE_BNDREGS_MASK | XSTATE_BNDCSR_MASK); + } + } else if (idx == 1) { + hv_vmx_read_capability(HV_VMX_CAP_PROCBASED2, &cap); + eax &= CPUID_XSAVE_XSAVEOPT | CPUID_XSAVE_XGETBV1; + if (!(cap & CPU_BASED2_XSAVES_XRSTORS)) { + eax &= ~CPUID_XSAVE_XSAVES; + } + } + break; + case 0x80000001: + /* LM only if HVF in 64-bit mode */ + edx &= CPUID_FP87 | CPUID_VME | CPUID_DE | CPUID_PSE | CPUID_TSC | + CPUID_MSR | CPUID_PAE | CPUID_MCE | CPUID_CX8 | CPUID_APIC | + CPUID_EXT2_SYSCALL | CPUID_MTRR | CPUID_PGE | CPUID_MCA | CPUID_CMOV | + CPUID_PAT | CPUID_PSE36 | CPUID_EXT2_MMXEXT | CPUID_MMX | + CPUID_FXSR | CPUID_EXT2_FXSR | CPUID_EXT2_PDPE1GB | CPUID_EXT2_3DNOWEXT | + CPUID_EXT2_3DNOW | CPUID_EXT2_LM | CPUID_EXT2_RDTSCP | CPUID_EXT2_NX; + hv_vmx_read_capability(HV_VMX_CAP_PROCBASED, &cap); + if (!(cap & CPU_BASED_TSC_OFFSET)) { + edx &= ~CPUID_EXT2_RDTSCP; + } + ecx &= CPUID_EXT3_LAHF_LM | CPUID_EXT3_CMP_LEG | CPUID_EXT3_CR8LEG | + CPUID_EXT3_ABM | CPUID_EXT3_SSE4A | CPUID_EXT3_MISALIGNSSE | + CPUID_EXT3_3DNOWPREFETCH | CPUID_EXT3_OSVW | CPUID_EXT3_XOP | + CPUID_EXT3_FMA4 | CPUID_EXT3_TBM; + break; + default: + return 0; + } + + switch (reg) { + case R_EAX: + return eax; + case R_EBX: + return ebx; + case R_ECX: + return ecx; + case R_EDX: + return edx; + default: + return 0; + } +}