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x86/vmware: Parse MP tables for SEV-SNP enabled guests under VMware hypervisors

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Under VMware hypervisors, SEV-SNP enabled VMs are fundamentally able to boot
without UEFI, but this regressed a year ago due to:

  0f4a1e8098 ("x86/sev: Skip ROM range scans and validation for SEV-SNP guests")

In this case, mpparse_find_mptable() has to be called to parse MP
tables which contains the necessary boot information.

[ mingo: Updated the changelog. ]

Fixes: 0f4a1e8098 ("x86/sev: Skip ROM range scans and validation for SEV-SNP guests")
Co-developed-by: Ye Li <ye.li@broadcom.com>
Signed-off-by: Ye Li <ye.li@broadcom.com>
Signed-off-by: Ajay Kaher <ajay.kaher@broadcom.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Tested-by: Ye Li <ye.li@broadcom.com>
Reviewed-by: Kevin Loughlin <kevinloughlin@google.com>
Acked-by: Borislav Petkov (AMD) <bp@alien8.de>
Link: https://lore.kernel.org/r/20250313173111.10918-1-ajay.kaher@broadcom.com
This commit is contained in:
Ajay Kaher
2025-03-13 17:31:11 +00:00
committed by Ingo Molnar
parent b7f94fcf55
commit a2ab25529b
1 changed files with 4 additions and 0 deletions
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4
arch/x86/kernel/cpu/vmware.c
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@@ -26,6 +26,7 @@
#include <linux/export.h>
#include <linux/clocksource.h>
#include <linux/cpu.h>
#include <linux/efi.h>
#include <linux/reboot.h>
#include <linux/static_call.h>
#include <asm/div64.h>
@@ -429,6 +430,9 @@ static void __init vmware_platform_setup(void)
pr_warn("Failed to get TSC freq from the hypervisor\n");
}
if (cc_platform_has(CC_ATTR_GUEST_SEV_SNP) && !efi_enabled(EFI_BOOT))
x86_init.mpparse.find_mptable = mpparse_find_mptable;
vmware_paravirt_ops_setup();
#ifdef CONFIG_X86_IO_APIC