github-mirror/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-06-05 04:56:13 +02:00
Code Issues Actions Packages Projects Releases Wiki Activity Graph

x86/sev: Register tpm-svsm platform device

Browse Source 
SNP platform can provide a vTPM device emulated by SVSM.

The "tpm-svsm" device can be handled by the platform driver registered by the
x86/sev core code.

Register the platform device only when SVSM is available and it supports vTPM
commands as checked by snp_svsm_vtpm_probe().

  [ bp: Massage commit message. ]

Signed-off-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Reviewed-by: Jarkko Sakkinen <jarkko@kernel.org>
Link: https://lore.kernel.org/r/20250410135118.133240-5-sgarzare@redhat.com
This commit is contained in:
Stefano Garzarella 2025-04-10 15:51:16 +02:00 committed by Borislav Petkov (AMD)
parent 93b7c6b3ce
commit e396dd8517
1 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

11
arch/x86/coco/sev/core.c
View File

@ -2688,6 +2688,11 @@ static struct platform_device sev_guest_device = {
.id = -1,
};
static struct platform_device tpm_svsm_device = {
.name = "tpm-svsm",
.id = -1,
};
static int __init snp_init_platform_device(void)
{
if (!cc_platform_has(CC_ATTR_GUEST_SEV_SNP))
@ -2696,7 +2701,11 @@ static int __init snp_init_platform_device(void)
if (platform_device_register(&sev_guest_device))
return -ENODEV;
pr_info("SNP guest platform device initialized.\n");
if (snp_svsm_vtpm_probe() &&
platform_device_register(&tpm_svsm_device))
return -ENODEV;
pr_info("SNP guest platform devices initialized.\n");
return 0;
}
device_initcall(snp_init_platform_device);