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| author | Mark Brown <broonie@kernel.org> | 2019-06-10 18:52:53 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2019-06-10 18:52:53 +0100 |
| commit | 4343f61103cdb8ccd6f3d5dd7168f1176a1cee37 (patch) | |
| tree | 3db0a2e099cf7feb0c2d60d2a4bf1bf10d5253db /arch/x86/kernel/cpu/amd.c | |
| parent | aef9752274f4045b0dab577e113da63c96832f77 (diff) | |
| parent | d1fdb6d8f6a4109a4263176c84b899076a5f8008 (diff) | |
Merge tag 'v5.2-rc4' into spi-5.3
Linux 5.2-rc4
Diffstat (limited to 'arch/x86/kernel/cpu/amd.c')
| -rw-r--r-- | arch/x86/kernel/cpu/amd.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c index fb6a64bd765f..8d4e50428b68 100644 --- a/arch/x86/kernel/cpu/amd.c +++ b/arch/x86/kernel/cpu/amd.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: GPL-2.0-only #include <linux/export.h> #include <linux/bitops.h> #include <linux/elf.h> @@ -823,8 +824,11 @@ static void init_amd_zn(struct cpuinfo_x86 *c) { set_cpu_cap(c, X86_FEATURE_ZEN); - /* Fix erratum 1076: CPB feature bit not being set in CPUID. */ - if (!cpu_has(c, X86_FEATURE_CPB)) + /* + * Fix erratum 1076: CPB feature bit not being set in CPUID. + * Always set it, except when running under a hypervisor. + */ + if (!cpu_has(c, X86_FEATURE_HYPERVISOR) && !cpu_has(c, X86_FEATURE_CPB)) set_cpu_cap(c, X86_FEATURE_CPB); } |