diff options
| author | Stefano Garzarella <sgarzare@redhat.com> | 2025-04-10 15:51:16 +0200 |
|---|---|---|
| committer | Borislav Petkov (AMD) <bp@alien8.de> | 2025-04-10 16:25:33 +0200 |
| commit | e396dd85172c6098e3b70b17e91424edc7bb2d8f (patch) | |
| tree | 1b2a9a51f71eafd38661c803498393e56d638109 | |
| parent | 93b7c6b3ce918c3d24de82dcff7a87b8bd631b2e (diff) | |
x86/sev: Register tpm-svsm platform device
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
| -rw-r--r-- | arch/x86/coco/sev/core.c | 11 |
1 files changed, 10 insertions, 1 deletions
diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c index ecd09dad87f2..654a4cc06b3f 100644 --- a/arch/x86/coco/sev/core.c +++ b/arch/x86/coco/sev/core.c @@ -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); |