diff options
| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-06-22 16:41:28 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-06-24 09:57:46 -0300 |
| commit | e3e3eb0a2ea615c272cec5f47ba9f243ccdaf386 (patch) | |
| tree | 67861e0d5cab0df49dc7a76527317b793d2ef047 /sysdeps/x86/bits | |
| parent | ea26ff03227d7cacef5de6036df57734373449b4 (diff) | |
| download | glibc-e3e3eb0a2ea615c272cec5f47ba9f243ccdaf386.zip glibc-e3e3eb0a2ea615c272cec5f47ba9f243ccdaf386.tar.gz glibc-e3e3eb0a2ea615c272cec5f47ba9f243ccdaf386.tar.bz2 | |
x86: Fix tst-cpu-features-cpuinfo on Ryzen 9 (BZ #27873)
AMD define different flags for IRPB, IBRS, and STIPBP [1], so new
x86_64_cpu are added and IBRS_IBPB is only tested for Intel.
The SSDB is also defined and implemented different on AMD [2],
and also a new AMD_SSDB flag is added. It should map to the
cpuinfo 'ssdb' on recent AMD cpus.
It fixes tst-cpu-features-cpuinfo and tst-cpu-features-cpuinfo-static
on recent AMD cpus.
Checked on x86_64-linux-gnu on AMD Ryzen 9 5900X.
[1] https://developer.amd.com/wp-content/resources/Architecture_Guidelines_Update_Indirect_Branch_Control.pdf
[2] https://bugzilla.kernel.org/show_bug.cgi?id=199889
Reviewed-by: H.J. Lu <hjl.tools@gmail.com>
Diffstat (limited to 'sysdeps/x86/bits')
| -rw-r--r-- | sysdeps/x86/bits/platform/x86.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/sysdeps/x86/bits/platform/x86.h b/sysdeps/x86/bits/platform/x86.h index fe08d8a..26e3b67 100644 --- a/sysdeps/x86/bits/platform/x86.h +++ b/sysdeps/x86/bits/platform/x86.h @@ -278,6 +278,10 @@ enum + cpuid_register_index_ebx * 8 * sizeof (unsigned int)), x86_cpu_WBNOINVD = x86_cpu_index_80000008_ebx + 9, + x86_cpu_AMD_IBPB = x86_cpu_index_80000008_ebx + 12, + x86_cpu_AMD_IBRS = x86_cpu_index_80000008_ebx + 14, + x86_cpu_AMD_STIBP = x86_cpu_index_80000008_ebx + 15, + x86_cpu_AMD_SSBD = x86_cpu_index_80000008_ebx + 24, x86_cpu_index_7_ecx_1_eax = (CPUID_INDEX_7_ECX_1 * 8 * 4 * sizeof (unsigned int) |