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60b8d4d492
Pull x86 SEV updates from Borislav Petkov: - Change the SEV host code handling of when SNP gets enabled in order to allow the machine to claim SNP-related resources only when SNP guests are really going to be launched. The user requests this by loading the ccp module and thus it controls when SNP initialization is done So export an API which module code can call and do the necessary SNP setup only when really needed - Drop an unnecessary write-back and invalidate operation that was being performed too early, since the ccp driver already issues its own at the correct point in the initialization sequence - Drop the hotplug callbacks for enabling SNP on newly onlined CPUs, which were both architecturally unsound (the firmware rejects initialization if any CPU lacks the required configuration) and buggy (the MFDM SYSCFG MSR bit was not being set) - Code refactoring and cleanups to accomplish the above * tag 'x86_sev_for_v7.1_rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: crypto/ccp: Update HV_FIXED page states to allow freeing of memory crypto/ccp: Implement SNP x86 shutdown x86/sev, crypto/ccp: Move HSAVE_PA setup to arch/x86/ x86/sev, crypto/ccp: Move SNP init to ccp driver x86/sev: Create snp_shutdown() x86/sev: Create snp_prepare() x86/sev: Create a function to clear/zero the RMP x86/sev: Rename SNP_FEATURES_PRESENT to SNP_FEATURES_IMPL x86/virt/sev: Keep the RMP table bookkeeping area mapped x86/virt/sev: Drop WBINVD before setting MSR_AMD64_SYSCFG_SNP_EN x86/virt/sev: Drop support for SNP hotplug