Re: [PATCH Part1 RFC v3 04/22] x86/mm: Add sev_feature_enabled() helper
From: Borislav Petkov <bp@alien8.de>
Date: 2021-06-05 10:53:15
Also in:
kvm, linux-crypto, linux-efi, linux-mm, lkml, platform-driver-x86
On Wed, Jun 02, 2021 at 09:03:58AM -0500, Brijesh Singh wrote:
quoted hunk ↗ jump to hunk
@@ -78,6 +85,7 @@ static inline void sev_es_init_vc_handling(void) { } static inline bool sme_active(void) { return false; } static inline bool sev_active(void) { return false; } static inline bool sev_es_active(void) { return false; } +static inline bool sev_snp_active(void) { return false; }
Leftover from the previous version, can go.
+bool sev_feature_enabled(unsigned int type)
+{
+ switch (type) {
+ case SEV: return sev_status & MSR_AMD64_SEV_ENABLED;
+ case SEV_ES: return sev_status & MSR_AMD64_SEV_ES_ENABLED;
+ case SEV_SNP: return sev_status & MSR_AMD64_SEV_SNP_ENABLED;
+ default: return false;
+ }
+}Yeah, btw, we might even do a generic one, see: https://lkml.kernel.org/r/YLkcIuL2qvo0hviU@zn.tnic and the following mail. But that doesn't matter as sev_feature_enabled()'s body can go into sev_protected_guest_has() or whatever we end up calling it. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette