Commit 299933b1 authored by Tycho Andersen (AMD)'s avatar Tycho Andersen (AMD) Committed by Borislav Petkov (AMD)
Browse files

x86/sev, crypto/ccp: Move SNP init to ccp driver 



Use the new snp_prepare() to initialize SNP from the ccp driver instead of at
boot time. This means that SNP is not enabled unless it is really going to be
used (i.e. kvm_amd loads the ccp driver automatically).

Signed-off-by: default avatarTycho Andersen (AMD) <tycho@kernel.org>
Signed-off-by: default avatarBorislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: default avatarTom Lendacky <thomas.lendacky@amd.com>
Link: https://patch.msgid.link/20260324161301.1353976-5-tycho@kernel.org
parent b65546b1

arch/x86/virt/svm/sev.c

+0 −2
Original line number Diff line number Diff line
@@ -562,8 +562,6 @@ int __init snp_rmptable_init(void) 
	if (!setup_rmptable())

		return -ENOSYS;



	snp_prepare();



	/*

	 * Setting crash_kexec_post_notifiers to 'true' to ensure that SNP panic

	 * notifier is invoked to do SNP IOMMU shutdown before kdump.

drivers/crypto/ccp/sev-dev.c

+2 −0
Original line number Diff line number Diff line
@@ -1373,6 +1373,8 @@ static int __sev_snp_init_locked(int *error, unsigned int max_snp_asid) 
		return -EOPNOTSUPP;

	}



	snp_prepare();



	/* SNP_INIT requires MSR_VM_HSAVE_PA to be cleared on all CPUs. */

	on_each_cpu(snp_set_hsave_pa, NULL, 1);