Commit 99cf1fb5 authored by Tycho Andersen (AMD)'s avatar Tycho Andersen (AMD) Committed by Borislav Petkov (AMD)
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x86/virt/sev: Drop WBINVD before setting MSR_AMD64_SYSCFG_SNP_EN 



WBINVD is required before SNP_INIT(_EX), but not before setting
MSR_AMD64_SYSCFG_SNP_EN, since the ccp driver already does its own WBINVD
before SNP_INIT (and this one would be too early for that anyway...).

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/20260309180053.2389118-3-tycho@kernel.org
parent 959d3f75

arch/x86/virt/svm/sev.c

+0 −3
Original line number Diff line number Diff line
@@ -524,9 +524,6 @@ int __init snp_rmptable_init(void) 
		memset(desc->rmp_entry, 0, desc->size);

	}



	/* Flush the caches to ensure that data is written before SNP is enabled. */

	wbinvd_on_all_cpus();



	/* MtrrFixDramModEn must be enabled on all the CPUs prior to enabling SNP. */

	on_each_cpu(mfd_enable, NULL, 1);