diff options
| author | Michael Pratt <mpratt@google.com> | 2019-02-13 11:58:49 -0800 |
|---|---|---|
| committer | Shentubot <shentubot@google.com> | 2019-02-13 11:59:59 -0800 |
| commit | 2c7488454e7fcbf98c00bcdceb70cb8e2fa98c96 (patch) | |
| tree | 503725fe64b26613ce4501193a007408128c3d1c /pkg/cpuid | |
| parent | 3ff9dc9cc1f69605f9e9e3c028d81957c37349a3 (diff) | |
Expose XSAVES in /proc/cpuinfo
Linux started doing this in b8be15d588060a03569ac85dc4a0247460988f5b
("x86/fpu/xstate: Re-enable XSAVES"), which first appeared in 4.8.
PiperOrigin-RevId: 233800931
Change-Id: Icac2c2b03ccf1a91f3070431efb5152ca619fca3
Diffstat (limited to 'pkg/cpuid')
| -rw-r--r-- | pkg/cpuid/cpuid.go | 4 | ||||
| -rw-r--r-- | pkg/cpuid/cpuid_parse_test.go | 5 |
2 files changed, 6 insertions, 3 deletions
diff --git a/pkg/cpuid/cpuid.go b/pkg/cpuid/cpuid.go index c19606898..541715877 100644 --- a/pkg/cpuid/cpuid.go +++ b/pkg/cpuid/cpuid.go @@ -361,6 +361,7 @@ var x86FeatureStrings = map[Feature]string{ X86FeatureXSAVEOPT: "xsaveopt", X86FeatureXSAVEC: "xsavec", X86FeatureXGETBV1: "xgetbv1", + X86FeatureXSAVES: "xsaves", // Block 5. X86FeatureLAHF64: "lahf_lm", // LAHF/SAHF in long mode @@ -415,9 +416,6 @@ var x86FeatureParseOnlyStrings = map[Feature]string{ // Block 3. X86FeaturePREFETCHWT1: "prefetchwt1", - - // Block 4. - X86FeatureXSAVES: "xsaves", } // Just a way to wrap cpuid function numbers. diff --git a/pkg/cpuid/cpuid_parse_test.go b/pkg/cpuid/cpuid_parse_test.go index 954ed53b6..88e75c110 100644 --- a/pkg/cpuid/cpuid_parse_test.go +++ b/pkg/cpuid/cpuid_parse_test.go @@ -114,6 +114,11 @@ func TestHostFeatureFlags(t *testing.T) { // PKU only exposed in dfb4a70f20c5b3880da56ee4c9484bdb4e8f1e65 // (4.9). continue + // Block 4. + case f == X86FeatureXSAVES && (major < 4 || major == 4 && minor < 8): + // XSAVES only exposed in + // b8be15d588060a03569ac85dc4a0247460988f5b (4.8). + continue } hidden := f.flagString(true) == "" |