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target/i386: add VMX features
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Add code to convert the VMX feature words back into MSR values,
allowing the user to enable/disable VMX features as they wish.  The same
infrastructure enables support for limiting VMX features in named
CPU models.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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bonzini committed Oct 4, 2019
1 parent 49d51b8 commit 20a78b0
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225 changes: 225 additions & 0 deletions target/i386/cpu.c
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Expand Up @@ -1232,6 +1232,163 @@ static FeatureWordInfo feature_word_info[FEATURE_WORDS] = {
.index = MSR_IA32_CORE_CAPABILITY,
},
},

[FEAT_VMX_PROCBASED_CTLS] = {
.type = MSR_FEATURE_WORD,
.feat_names = {
NULL, NULL, "vmx-vintr-pending", "vmx-tsc-offset",
NULL, NULL, NULL, "vmx-hlt-exit",
NULL, "vmx-invlpg-exit", "vmx-mwait-exit", "vmx-rdpmc-exit",
"vmx-rdtsc-exit", NULL, NULL, "vmx-cr3-load-noexit",
"vmx-cr3-store-noexit", NULL, NULL, "vmx-cr8-load-exit",
"vmx-cr8-store-exit", "vmx-flexpriority", "vmx-vnmi-pending", "vmx-movdr-exit",
"vmx-io-exit", "vmx-io-bitmap", NULL, "vmx-mtf",
"vmx-msr-bitmap", "vmx-monitor-exit", "vmx-pause-exit", "vmx-secondary-ctls",
},
.msr = {
.index = MSR_IA32_VMX_TRUE_PROCBASED_CTLS,
}
},

[FEAT_VMX_SECONDARY_CTLS] = {
.type = MSR_FEATURE_WORD,
.feat_names = {
"vmx-apicv-xapic", "vmx-ept", "vmx-desc-exit", "vmx-rdtscp-exit",
"vmx-apicv-x2apic", "vmx-vpid", "vmx-wbinvd-exit", "vmx-unrestricted-guest",
"vmx-apicv-register", "vmx-apicv-vid", "vmx-ple", "vmx-rdrand-exit",
"vmx-invpcid-exit", "vmx-vmfunc", "vmx-shadow-vmcs", "vmx-encls-exit",
"vmx-rdseed-exit", "vmx-pml", NULL, NULL,
"vmx-xsaves", NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
},
.msr = {
.index = MSR_IA32_VMX_PROCBASED_CTLS2,
}
},

[FEAT_VMX_PINBASED_CTLS] = {
.type = MSR_FEATURE_WORD,
.feat_names = {
"vmx-intr-exit", NULL, NULL, "vmx-nmi-exit",
NULL, "vmx-vnmi", "vmx-preemption-timer", "vmx-posted-intr",
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
},
.msr = {
.index = MSR_IA32_VMX_TRUE_PINBASED_CTLS,
}
},

[FEAT_VMX_EXIT_CTLS] = {
.type = MSR_FEATURE_WORD,
/*
* VMX_VM_EXIT_HOST_ADDR_SPACE_SIZE is copied from
* the LM CPUID bit.
*/
.feat_names = {
NULL, NULL, "vmx-exit-nosave-debugctl", NULL,
NULL, NULL, NULL, NULL,
NULL, NULL /* vmx-exit-host-addr-space-size */, NULL, NULL,
"vmx-exit-load-perf-global-ctrl", NULL, NULL, "vmx-exit-ack-intr",
NULL, NULL, "vmx-exit-save-pat", "vmx-exit-load-pat",
"vmx-exit-save-efer", "vmx-exit-load-efer",
"vmx-exit-save-preemption-timer", "vmx-exit-clear-bndcfgs",
NULL, "vmx-exit-clear-rtit-ctl", NULL, NULL,
NULL, NULL, NULL, NULL,
},
.msr = {
.index = MSR_IA32_VMX_TRUE_EXIT_CTLS,
}
},

[FEAT_VMX_ENTRY_CTLS] = {
.type = MSR_FEATURE_WORD,
.feat_names = {
NULL, NULL, "vmx-entry-noload-debugctl", NULL,
NULL, NULL, NULL, NULL,
NULL, "vmx-entry-ia32e-mode", NULL, NULL,
NULL, "vmx-entry-load-perf-global-ctrl", "vmx-entry-load-pat", "vmx-entry-load-efer",
"vmx-entry-load-bndcfgs", NULL, "vmx-entry-load-rtit-ctl", NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
},
.msr = {
.index = MSR_IA32_VMX_TRUE_ENTRY_CTLS,
}
},

[FEAT_VMX_MISC] = {
.type = MSR_FEATURE_WORD,
.feat_names = {
NULL, NULL, NULL, NULL,
NULL, "vmx-store-lma", "vmx-activity-hlt", "vmx-activity-shutdown",
"vmx-activity-wait-sipi", NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, "vmx-vmwrite-vmexit-fields", "vmx-zero-len-inject", NULL,
},
.msr = {
.index = MSR_IA32_VMX_MISC,
}
},

[FEAT_VMX_EPT_VPID_CAPS] = {
.type = MSR_FEATURE_WORD,
.feat_names = {
"vmx-ept-execonly", NULL, NULL, NULL,
NULL, NULL, "vmx-page-walk-4", "vmx-page-walk-5",
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
"vmx-ept-2mb", "vmx-ept-1gb", NULL, NULL,
"vmx-invept", "vmx-eptad", "vmx-ept-advanced-exitinfo", NULL,
NULL, "vmx-invept-single-context", "vmx-invept-all-context", NULL,
NULL, NULL, NULL, NULL,
"vmx-invvpid", NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
"vmx-invvpid-single-addr", "vmx-invept-single-context",
"vmx-invvpid-all-context", "vmx-invept-single-context-noglobals",
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
NULL, NULL, NULL, NULL,
},
.msr = {
.index = MSR_IA32_VMX_EPT_VPID_CAP,
}
},

[FEAT_VMX_BASIC] = {
.type = MSR_FEATURE_WORD,
.feat_names = {
[54] = "vmx-ins-outs",
[55] = "vmx-true-ctls",
},
.msr = {
.index = MSR_IA32_VMX_BASIC,
},
/* Just to be safe - we don't support setting the MSEG version field. */
.no_autoenable_flags = MSR_VMX_BASIC_DUAL_MONITOR,
},

[FEAT_VMX_VMFUNC] = {
.type = MSR_FEATURE_WORD,
.feat_names = {
[0] = "vmx-eptp-switching",
},
.msr = {
.index = MSR_IA32_VMX_VMFUNC,
}
},

};

typedef struct FeatureMask {
Expand All @@ -1252,6 +1409,74 @@ static FeatureDep feature_dependencies[] = {
.from = { FEAT_7_0_EDX, CPUID_7_0_EDX_CORE_CAPABILITY },
.to = { FEAT_CORE_CAPABILITY, ~0ull },
},
{
.from = { FEAT_1_ECX, CPUID_EXT_VMX },
.to = { FEAT_VMX_PROCBASED_CTLS, ~0ull },
},
{
.from = { FEAT_1_ECX, CPUID_EXT_VMX },
.to = { FEAT_VMX_PINBASED_CTLS, ~0ull },
},
{
.from = { FEAT_1_ECX, CPUID_EXT_VMX },
.to = { FEAT_VMX_EXIT_CTLS, ~0ull },
},
{
.from = { FEAT_1_ECX, CPUID_EXT_VMX },
.to = { FEAT_VMX_ENTRY_CTLS, ~0ull },
},
{
.from = { FEAT_1_ECX, CPUID_EXT_VMX },
.to = { FEAT_VMX_MISC, ~0ull },
},
{
.from = { FEAT_1_ECX, CPUID_EXT_VMX },
.to = { FEAT_VMX_BASIC, ~0ull },
},
{
.from = { FEAT_8000_0001_EDX, CPUID_EXT2_LM },
.to = { FEAT_VMX_ENTRY_CTLS, VMX_VM_ENTRY_IA32E_MODE },
},
{
.from = { FEAT_VMX_PROCBASED_CTLS, VMX_CPU_BASED_ACTIVATE_SECONDARY_CONTROLS },
.to = { FEAT_VMX_SECONDARY_CTLS, ~0ull },
},
{
.from = { FEAT_XSAVE, CPUID_XSAVE_XSAVES },
.to = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_XSAVES },
},
{
.from = { FEAT_1_ECX, CPUID_EXT_RDRAND },
.to = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_RDRAND_EXITING },
},
{
.from = { FEAT_7_0_EBX, CPUID_7_0_EBX_INVPCID },
.to = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_ENABLE_INVPCID },
},
{
.from = { FEAT_7_0_EBX, CPUID_7_0_EBX_RDSEED },
.to = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_RDSEED_EXITING },
},
{
.from = { FEAT_8000_0001_EDX, CPUID_EXT2_RDTSCP },
.to = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_RDTSCP },
},
{
.from = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_ENABLE_EPT },
.to = { FEAT_VMX_EPT_VPID_CAPS, 0xffffffffull },
},
{
.from = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_ENABLE_EPT },
.to = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_UNRESTRICTED_GUEST },
},
{
.from = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_ENABLE_VPID },
.to = { FEAT_VMX_EPT_VPID_CAPS, 0xffffffffull << 32 },
},
{
.from = { FEAT_VMX_SECONDARY_CTLS, VMX_SECONDARY_EXEC_ENABLE_VMFUNC },
.to = { FEAT_VMX_VMFUNC, ~0ull },
},
};

typedef struct X86RegisterInfo32 {
Expand Down
9 changes: 9 additions & 0 deletions target/i386/cpu.h
View file
Expand Up @@ -518,6 +518,15 @@ typedef enum FeatureWord {
FEAT_XSAVE_COMP_HI, /* CPUID[EAX=0xd,ECX=0].EDX */
FEAT_ARCH_CAPABILITIES,
FEAT_CORE_CAPABILITY,
FEAT_VMX_PROCBASED_CTLS,
FEAT_VMX_SECONDARY_CTLS,
FEAT_VMX_PINBASED_CTLS,
FEAT_VMX_EXIT_CTLS,
FEAT_VMX_ENTRY_CTLS,
FEAT_VMX_MISC,
FEAT_VMX_EPT_VPID_CAPS,
FEAT_VMX_BASIC,
FEAT_VMX_VMFUNC,
FEATURE_WORDS,
} FeatureWord;

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