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author | Borislav Petkov (AMD) <bp@alien8.de> | 2024-03-27 18:43:17 +0300 |
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committer | Borislav Petkov (AMD) <bp@alien8.de> | 2024-04-04 11:40:30 +0300 |
commit | 0ecaefb303de69929dc0036d5021d01cec7ea052 (patch) | |
tree | be2be2168e4dd2f405e704f751889f23e617593b /arch/x86/kernel/sev.c | |
parent | bc6f707fc0feec72acc2f49c312eb31d257363a3 (diff) | |
download | linux-0ecaefb303de69929dc0036d5021d01cec7ea052.tar.xz |
x86/CPU/AMD: Track SNP host status with cc_platform_*()
The host SNP worthiness can determined later, after alternatives have
been patched, in snp_rmptable_init() depending on cmdline options like
iommu=pt which is incompatible with SNP, for example.
Which means that one cannot use X86_FEATURE_SEV_SNP and will need to
have a special flag for that control.
Use that newly added CC_ATTR_HOST_SEV_SNP in the appropriate places.
Move kdump_sev_callback() to its rightful place, while at it.
Fixes: 216d106c7ff7 ("x86/sev: Add SEV-SNP host initialization support")
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Tested-by: Srikanth Aithal <sraithal@amd.com>
Link: https://lore.kernel.org/r/20240327154317.29909-6-bp@alien8.de
Diffstat (limited to 'arch/x86/kernel/sev.c')
-rw-r--r-- | arch/x86/kernel/sev.c | 10 |
1 files changed, 0 insertions, 10 deletions
diff --git a/arch/x86/kernel/sev.c b/arch/x86/kernel/sev.c index 7e1e63cc48e6..38ad066179d8 100644 --- a/arch/x86/kernel/sev.c +++ b/arch/x86/kernel/sev.c @@ -2284,16 +2284,6 @@ static int __init snp_init_platform_device(void) } device_initcall(snp_init_platform_device); -void kdump_sev_callback(void) -{ - /* - * Do wbinvd() on remote CPUs when SNP is enabled in order to - * safely do SNP_SHUTDOWN on the local CPU. - */ - if (cpu_feature_enabled(X86_FEATURE_SEV_SNP)) - wbinvd(); -} - void sev_show_status(void) { int i; |