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[79.46.200.29]) by smtp.gmail.com with ESMTPSA id a640c23a62f3a-ac239485bf3sm903753666b.63.2025.03.11.02.42.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 11 Mar 2025 02:42:49 -0700 (PDT) From: Stefano Garzarella To: Jarkko Sakkinen Cc: Peter Huewe , Tom Lendacky , Jason Gunthorpe , x86@kernel.org, linux-kernel@vger.kernel.org, Borislav Petkov , linux-integrity@vger.kernel.org, Dov Murik , Dionna Glaze , linux-coco@lists.linux.dev, James Bottomley , Claudio Carvalho , Ingo Molnar , "H. Peter Anvin" , Thomas Gleixner , Dave Hansen , Joerg Roedel , Stefano Garzarella Subject: [PATCH v3 4/4] x86/sev: register tpm-svsm platform device Date: Tue, 11 Mar 2025 10:42:25 +0100 Message-ID: <20250311094225.35129-5-sgarzare@redhat.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250311094225.35129-1-sgarzare@redhat.com> References: <20250311094225.35129-1-sgarzare@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit SNP platform can provide a vTPM device emulated by SVSM. The "tpm-svsm" device can be handled by the platform driver added by the previous commit in drivers/char/tpm/tpm_svsm.c The driver will call snp_svsm_vtpm_probe() to check if SVSM is present and if it's support the vTPM protocol. Signed-off-by: Stefano Garzarella --- arch/x86/coco/sev/core.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/arch/x86/coco/sev/core.c b/arch/x86/coco/sev/core.c index 2166bdff88b7..a2383457889e 100644 --- a/arch/x86/coco/sev/core.c +++ b/arch/x86/coco/sev/core.c @@ -2664,6 +2664,11 @@ 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)) @@ -2672,6 +2677,9 @@ static int __init snp_init_platform_device(void) if (platform_device_register(&sev_guest_device)) return -ENODEV; + if (platform_device_register(&tpm_svsm_device)) + return -ENODEV; + pr_info("SNP guest platform device initialized.\n"); return 0; } -- 2.48.1