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cpu_x86: Properly disable unknown CPU features

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CPU features unknown to a hypervisor will not be present in dataDisabled
even though the features won't naturally be enabled because.
Thus any features we asked for which are not in dataEnabled should be
considered disabled.

Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
This commit is contained in:
Jiri Denemark
2017-07-13 09:53:15 +02:00
parent ee68bb391e
commit 83e081b8ab
9 changed files with 335 additions and 4 deletions
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src/cpu/cpu_x86.c
+5 -4
View File
@@ -2664,12 +2664,11 @@ virCPUx86UpdateLive(virCPUDefPtr cpu,
x86DataCopy(&disabled, &dataDisabled->data.x86) < 0)
goto cleanup;
x86DataSubtract(&enabled, &model->data);
for (i = 0; i < map->nfeatures; i++) {
virCPUx86FeaturePtr feature = map->features[i];
if (x86DataIsSubset(&enabled, &feature->data)) {
if (x86DataIsSubset(&enabled, &feature->data) &&
!x86DataIsSubset(&model->data, &feature->data)) {
VIR_DEBUG("Feature '%s' enabled by the hypervisor", feature->name);
if (cpu->check == VIR_CPU_CHECK_FULL)
virBufferAsprintf(&bufAdded, "%s,", feature->name);
@@ -2678,7 +2677,9 @@ virCPUx86UpdateLive(virCPUDefPtr cpu,
goto cleanup;
}
if (x86DataIsSubset(&disabled, &feature->data)) {
if (x86DataIsSubset(&disabled, &feature->data) ||
(x86DataIsSubset(&model->data, &feature->data) &&
!x86DataIsSubset(&enabled, &feature->data))) {
VIR_DEBUG("Feature '%s' disabled by the hypervisor", feature->name);
if (cpu->check == VIR_CPU_CHECK_FULL)
virBufferAsprintf(&bufRemoved, "%s,", feature->name);
tests/cputest.c
+1
View File
@@ -991,6 +991,7 @@ mymain(void)
DO_TEST_CPUID(VIR_ARCH_X86_64, "Core-i7-4600U", true);
DO_TEST_CPUID(VIR_ARCH_X86_64, "Core-i7-4510U", true);
DO_TEST_CPUID(VIR_ARCH_X86_64, "Core-i7-5600U", true);
DO_TEST_CPUID(VIR_ARCH_X86_64, "Core-i7-5600U-arat", true);
DO_TEST_CPUID(VIR_ARCH_X86_64, "Core2-E6850", true);
DO_TEST_CPUID(VIR_ARCH_X86_64, "Core2-Q9500", false);
DO_TEST_CPUID(VIR_ARCH_X86_64, "FX-8150", false);
tests/cputestdata/x86_64-cpuid-Core-i7-5600U-arat-disabled.xml
+5
View File
@@ -0,0 +1,5 @@
<!-- Features disabled by QEMU -->
<cpudata arch='x86'>
<cpuid eax_in='0x00000001' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x0800c1dc' edx='0xb0600000'/>
<cpuid eax_in='0x80000007' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000100'/>
</cpudata>
tests/cputestdata/x86_64-cpuid-Core-i7-5600U-arat-enabled.xml
+8
View File
@@ -0,0 +1,8 @@
<!-- Features enabled by QEMU -->
<cpudata arch='x86'>
<cpuid eax_in='0x00000001' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0xf7fa3223' edx='0x0f8bfbff'/>
<cpuid eax_in='0x00000007' ecx_in='0x00' eax='0x00000000' ebx='0x001c0fbb' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x0000000d' ecx_in='0x01' eax='0x00000001' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x40000001' ecx_in='0x00' eax='0x010000fa' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x80000001' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000121' edx='0x2c100800'/>
</cpudata>
tests/cputestdata/x86_64-cpuid-Core-i7-5600U-arat-guest.xml
+29
View File
@@ -0,0 +1,29 @@
<cpu mode='custom' match='exact'>
<model fallback='forbid'>Broadwell</model>
<vendor>Intel</vendor>
<feature policy='require' name='vme'/>
<feature policy='require' name='ds'/>
<feature policy='require' name='acpi'/>
<feature policy='require' name='ss'/>
<feature policy='require' name='ht'/>
<feature policy='require' name='tm'/>
<feature policy='require' name='pbe'/>
<feature policy='require' name='dtes64'/>
<feature policy='require' name='monitor'/>
<feature policy='require' name='ds_cpl'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='smx'/>
<feature policy='require' name='est'/>
<feature policy='require' name='tm2'/>
<feature policy='require' name='xtpr'/>
<feature policy='require' name='pdcm'/>
<feature policy='require' name='osxsave'/>
<feature policy='require' name='f16c'/>
<feature policy='require' name='rdrand'/>
<feature policy='require' name='arat'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='xsaveopt'/>
<feature policy='require' name='pdpe1gb'/>
<feature policy='require' name='abm'/>
<feature policy='require' name='invtsc'/>
</cpu>
tests/cputestdata/x86_64-cpuid-Core-i7-5600U-arat-host.xml
+30
View File
@@ -0,0 +1,30 @@
<cpu>
<arch>x86_64</arch>
<model>Broadwell</model>
<vendor>Intel</vendor>
<feature name='vme'/>
<feature name='ds'/>
<feature name='acpi'/>
<feature name='ss'/>
<feature name='ht'/>
<feature name='tm'/>
<feature name='pbe'/>
<feature name='dtes64'/>
<feature name='monitor'/>
<feature name='ds_cpl'/>
<feature name='vmx'/>
<feature name='smx'/>
<feature name='est'/>
<feature name='tm2'/>
<feature name='xtpr'/>
<feature name='pdcm'/>
<feature name='osxsave'/>
<feature name='f16c'/>
<feature name='rdrand'/>
<feature name='arat'/>
<feature name='tsc_adjust'/>
<feature name='xsaveopt'/>
<feature name='pdpe1gb'/>
<feature name='abm'/>
<feature name='invtsc'/>
</cpu>
tests/cputestdata/x86_64-cpuid-Core-i7-5600U-arat-json.xml
+14
View File
@@ -0,0 +1,14 @@
<cpu mode='custom' match='exact'>
<model fallback='forbid'>Broadwell</model>
<vendor>Intel</vendor>
<feature policy='require' name='vme'/>
<feature policy='require' name='ss'/>
<feature policy='require' name='vmx'/>
<feature policy='require' name='f16c'/>
<feature policy='require' name='rdrand'/>
<feature policy='require' name='hypervisor'/>
<feature policy='require' name='tsc_adjust'/>
<feature policy='require' name='xsaveopt'/>
<feature policy='require' name='pdpe1gb'/>
<feature policy='require' name='abm'/>
</cpu>
tests/cputestdata/x86_64-cpuid-Core-i7-5600U-arat.json
+202
View File
@@ -0,0 +1,202 @@
{
"return": {
"model": {
"name": "base",
"props": {
"pfthreshold": false,
"pku": false,
"rtm": true,
"tsc_adjust": true,
"tsc-deadline": true,
"xstore-en": false,
"tsc-scale": false,
"sse": true,
"smap": true,
"stepping": 4,
"tce": false,
"kvm_steal_time": true,
"smep": true,
"rdpid": false,
"xcrypt": false,
"sse4_2": true,
"monitor": false,
"sse4_1": true,
"kvm-mmu": false,
"flushbyasid": false,
"kvm-steal-time": true,
"lm": true,
"tsc": true,
"adx": true,
"fxsr": true,
"sha-ni": false,
"tm": false,
"pclmuldq": true,
"xgetbv1": false,
"xstore": false,
"vmcb_clean": false,
"vme": true,
"vendor": "GenuineIntel",
"ffxsr": false,
"de": true,
"avx512f": false,
"pse": true,
"ds-cpl": false,
"tbm": false,
"ia64": false,
"phe-en": false,
"f16c": true,
"ds": false,
"mpx": false,
"tsc-adjust": true,
"aes": true,
"avx2": true,
"pbe": false,
"cx16": true,
"ds_cpl": false,
"movbe": true,
"perfctr-nb": false,
"nrip_save": false,
"kvm_mmu": false,
"ospke": false,
"avx512ifma": false,
"vmx": true,
"sep": true,
"xsaveopt": true,
"sse4a": false,
"avx512dq": false,
"i64": true,
"avx512-4vnniw": false,
"xsave": true,
"erms": true,
"hle": true,
"nodeid_msr": false,
"est": false,
"svm_lock": false,
"xop": false,
"model-id": "Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz",
"abm": true,
"avx512er": false,
"sse4.1": true,
"sse4.2": true,
"pause-filter": false,
"lahf-lm": true,
"kvm-nopiodelay": true,
"cmp_legacy": false,
"acpi": false,
"fma4": false,
"popcnt": true,
"mmx": true,
"osxsave": false,
"pcommit": false,
"avx512pf": false,
"clwb": false,
"dca": false,
"pdcm": false,
"xcrypt-en": false,
"3dnow": false,
"invtsc": false,
"tm2": false,
"hypervisor": true,
"kvmclock-stable-bit": true,
"fxsr-opt": false,
"pcid": true,
"sse4-1": true,
"sse4-2": true,
"avx512-vpopcntdq": false,
"avx512-4fmaps": false,
"pause_filter": false,
"svm-lock": false,
"rdrand": true,
"nrip-save": false,
"avx512vl": false,
"x2apic": true,
"kvmclock": true,
"pge": true,
"family": 6,
"dtes64": false,
"xd": true,
"kvm_pv_eoi": true,
"ace2": false,
"kvm_pv_unhalt": true,
"xtpr": false,
"perfctr_nb": false,
"avx512bw": false,
"nx": true,
"lwp": false,
"msr": true,
"ace2-en": false,
"decodeassists": false,
"perfctr-core": false,
"pn": false,
"fma": true,
"nodeid-msr": false,
"kvm_asyncpf": true,
"clflush": true,
"cx8": true,
"mce": true,
"avx512cd": false,
"cr8legacy": false,
"mca": true,
"pni": true,
"rdseed": true,
"apic": true,
"fsgsbase": true,
"cmp-legacy": false,
"kvm-pv-unhalt": true,
"rdtscp": true,
"mmxext": false,
"cid": false,
"ssse3": true,
"extapic": false,
"pse36": true,
"mtrr": true,
"ibs": false,
"la57": false,
"avx": true,
"syscall": true,
"umip": false,
"invpcid": true,
"avx512vbmi": false,
"kvm-asyncpf": true,
"vmcb-clean": false,
"pmm": false,
"cmov": true,
"perfctr_core": false,
"misalignsse": false,
"clflushopt": false,
"pat": true,
"lbrv": false,
"3dnowprefetch": true,
"fpu": true,
"pae": true,
"wdt": false,
"tsc_scale": false,
"skinit": false,
"fxsr_opt": false,
"kvm_nopiodelay": true,
"pmm-en": false,
"phe": false,
"3dnowext": false,
"osvw": false,
"ht": false,
"pdpe1gb": true,
"kvm-pv-eoi": true,
"npt": false,
"xsavec": false,
"lahf_lm": true,
"pclmulqdq": true,
"svm": false,
"sse3": true,
"sse2": true,
"ss": true,
"topoext": false,
"smx": false,
"bmi1": true,
"bmi2": true,
"xsaves": false,
"model": 61
}
}
},
"id": "model-expansion"
}
tests/cputestdata/x86_64-cpuid-Core-i7-5600U-arat.xml
+41
View File
@@ -0,0 +1,41 @@
<!-- Intel(R) Core(TM) i7-5600U CPU @ 2.60GHz -->
<cpudata arch='x86'>
<cpuid eax_in='0x00000000' ecx_in='0x00' eax='0x00000014' ebx='0x756e6547' ecx='0x6c65746e' edx='0x49656e69'/>
<cpuid eax_in='0x00000001' ecx_in='0x00' eax='0x000306d4' ebx='0x00100800' ecx='0x7ffafbff' edx='0xbfebfbff'/>
<cpuid eax_in='0x00000002' ecx_in='0x00' eax='0x76036301' ebx='0x00f0b5ff' ecx='0x00000000' edx='0x00c30000'/>
<cpuid eax_in='0x00000003' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000004' ecx_in='0x00' eax='0x1c004121' ebx='0x01c0003f' ecx='0x0000003f' edx='0x00000000'/>
<cpuid eax_in='0x00000004' ecx_in='0x01' eax='0x1c004122' ebx='0x01c0003f' ecx='0x0000003f' edx='0x00000000'/>
<cpuid eax_in='0x00000004' ecx_in='0x02' eax='0x1c004143' ebx='0x01c0003f' ecx='0x000001ff' edx='0x00000000'/>
<cpuid eax_in='0x00000004' ecx_in='0x03' eax='0x1c03c163' ebx='0x03c0003f' ecx='0x00000fff' edx='0x00000006'/>
<cpuid eax_in='0x00000005' ecx_in='0x00' eax='0x00000040' ebx='0x00000040' ecx='0x00000003' edx='0x11142120'/>
<cpuid eax_in='0x00000006' ecx_in='0x00' eax='0x00000077' ebx='0x00000002' ecx='0x00000009' edx='0x00000000'/>
<cpuid eax_in='0x00000007' ecx_in='0x00' eax='0x00000000' ebx='0x021c2fbb' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000008' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000009' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x0000000a' ecx_in='0x00' eax='0x07300403' ebx='0x00000000' ecx='0x00000000' edx='0x00000603'/>
<cpuid eax_in='0x0000000b' ecx_in='0x00' eax='0x00000001' ebx='0x00000002' ecx='0x00000100' edx='0x00000000'/>
<cpuid eax_in='0x0000000b' ecx_in='0x01' eax='0x00000004' ebx='0x00000004' ecx='0x00000201' edx='0x00000000'/>
<cpuid eax_in='0x0000000c' ecx_in='0x00' eax='0x00000000' ebx='0x00000001' ecx='0x00000001' edx='0x00000000'/>
<cpuid eax_in='0x0000000d' ecx_in='0x00' eax='0x00000007' ebx='0x00000340' ecx='0x00000340' edx='0x00000000'/>
<cpuid eax_in='0x0000000d' ecx_in='0x01' eax='0x00000001' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x0000000d' ecx_in='0x02' eax='0x00000100' ebx='0x00000240' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x0000000e' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x0000000f' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000010' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000011' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000012' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000013' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x00000014' ecx_in='0x00' eax='0x00000000' ebx='0x00000001' ecx='0x00000001' edx='0x00000000'/>
<cpuid eax_in='0x80000000' ecx_in='0x00' eax='0x80000008' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x80000001' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000121' edx='0x2c100800'/>
<cpuid eax_in='0x80000002' ecx_in='0x00' eax='0x65746e49' ebx='0x2952286c' ecx='0x726f4320' edx='0x4d542865'/>
<cpuid eax_in='0x80000003' ecx_in='0x00' eax='0x37692029' ebx='0x3036352d' ecx='0x43205530' edx='0x40205550'/>
<cpuid eax_in='0x80000004' ecx_in='0x00' eax='0x362e3220' ebx='0x7a484730' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x80000005' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x80000006' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x01006040' edx='0x00000000'/>
<cpuid eax_in='0x80000007' ecx_in='0x00' eax='0x00000000' ebx='0x00000000' ecx='0x00000000' edx='0x00000100'/>
<cpuid eax_in='0x80000008' ecx_in='0x00' eax='0x00003027' ebx='0x00000000' ecx='0x00000000' edx='0x00000000'/>
<cpuid eax_in='0x80860000' ecx_in='0x00' eax='0x00000000' ebx='0x00000001' ecx='0x00000001' edx='0x00000000'/>
<cpuid eax_in='0xc0000000' ecx_in='0x00' eax='0x00000000' ebx='0x00000001' ecx='0x00000001' edx='0x00000000'/>
</cpudata>