On 3/27/24 10:43, Borislav Petkov wrote:
From: "Borislav Petkov (AMD)" <bp@xxxxxxxxx> 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 rightfull place, while at it. Signed-off-by: Borislav Petkov (AMD) <bp@xxxxxxxxx>
If late disabling of CPU feature flags is ever supported in the future, we should come back and possibly remove this. But until then...
Reviewed-by: Tom Lendacky <thomas.lendacky@xxxxxxx>
--- arch/x86/include/asm/sev.h | 4 ++-- arch/x86/kernel/cpu/amd.c | 38 ++++++++++++++++++------------ arch/x86/kernel/cpu/mtrr/generic.c | 2 +- arch/x86/kernel/sev.c | 10 -------- arch/x86/kvm/svm/sev.c | 2 +- arch/x86/virt/svm/sev.c | 26 +++++++++++++------- drivers/crypto/ccp/sev-dev.c | 2 +- drivers/iommu/amd/init.c | 4 +++- 8 files changed, 49 insertions(+), 39 deletions(-)
