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x86/virt/sev: Drop WBINVD before setting MSR_AMD64_SYSCFG_SNP_EN

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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: Tycho Andersen (AMD) <[email protected]>
Signed-off-by: Borislav Petkov (AMD) <[email protected]>
Reviewed-by: Tom Lendacky <[email protected]>
Link: https://patch.msgid.link/[email protected]
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Tycho Andersen (AMD) authored and Borislav Petkov (AMD) committed 2026-03-09 21:48:46 +01:00
1 parent 959d3f7565
commit 99cf1fb58e
1 file changed
-3
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arch/x86/virt/svm/sev.c
-3
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@@ -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);