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authorTom Lendacky <thomas.lendacky@amd.com>2020-01-15 23:05:16 +0100
committerBorislav Petkov <bp@suse.de>2020-01-16 20:23:20 +0100
commita006483b2f97af685f0e60f3a547c9ad4c9b9e94 (patch)
tree0edd8d4f98f6b23d44f681d6c2a021fca3577110 /arch
parentx86/resctrl: Fix potential memory leak (diff)
downloadlinux-a006483b2f97af685f0e60f3a547c9ad4c9b9e94.tar.xz
linux-a006483b2f97af685f0e60f3a547c9ad4c9b9e94.zip
x86/CPU/AMD: Ensure clearing of SME/SEV features is maintained
If the SME and SEV features are present via CPUID, but memory encryption support is not enabled (MSR 0xC001_0010[23]), the feature flags are cleared using clear_cpu_cap(). However, if get_cpu_cap() is later called, these feature flags will be reset back to present, which is not desired. Change from using clear_cpu_cap() to setup_clear_cpu_cap() so that the clearing of the flags is maintained. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: <stable@vger.kernel.org> # 4.16.x- Link: https://lkml.kernel.org/r/226de90a703c3c0be5a49565047905ac4e94e8f3.1579125915.git.thomas.lendacky@amd.com
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/kernel/cpu/amd.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/x86/kernel/cpu/amd.c b/arch/x86/kernel/cpu/amd.c
index 90f75e515876..62c30279be77 100644
--- a/arch/x86/kernel/cpu/amd.c
+++ b/arch/x86/kernel/cpu/amd.c
@@ -615,9 +615,9 @@ static void early_detect_mem_encrypt(struct cpuinfo_x86 *c)
return;
clear_all:
- clear_cpu_cap(c, X86_FEATURE_SME);
+ setup_clear_cpu_cap(X86_FEATURE_SME);
clear_sev:
- clear_cpu_cap(c, X86_FEATURE_SEV);
+ setup_clear_cpu_cap(X86_FEATURE_SEV);
}
}