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[83.245.197.49]) by smtp.gmail.com with ESMTPSA id z4-20020a2ebe04000000b0027fd65e4faesm927131ljq.108.2022.12.31.07.11.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 31 Dec 2022 07:11:08 -0800 (PST) From: Jarkko Sakkinen To: linux-crypto@vger.kernel.org, Brijesh Singh , Tom Lendacky , John Allen , Herbert Xu , "David S. Miller" Cc: Jarkko Sakkinen , linux-kernel@vger.kernel.org Subject: [PATCH] crypto: ccp: Improve sev_platform_init() error messages Date: Sat, 31 Dec 2022 15:11:06 +0000 Message-Id: <20221231151106.143121-1-jarkko@profian.com> X-Mailer: git-send-email 2.38.1 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" The following functions end up calling sev_platform_init() or __sev_platform_init_locked(): * sev_guest_init() * sev_ioctl_do_pek_csr * sev_ioctl_do_pdh_export() * sev_ioctl_do_pek_import() * sev_ioctl_do_pek_pdh_gen() * sev_pci_init() However, only sev_pci_init() prints out the failed command error code, and even there the error message does not specify, SEV which command failed. Address this by printing out the SEV command errors inside __sev_platform_init_locked(), and differentiate between DF_FLUSH, INIT and INIT_EX commands. This extra information is particularly useful if firmware loading and/or initialization is going to be made more robust, e.g. by allowing firmware loading to be postponed. Signed-off-by: Jarkko Sakkinen --- drivers/crypto/ccp/sev-dev.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index 5350eacaba3a..ac7385c12091 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -963,6 +963,7 @@ static int __sev_init_ex_locked(int *error) =20 static int __sev_platform_init_locked(int *error) { + const char *cmd =3D sev_init_ex_buffer ? "SEV_CMD_INIT_EX" : "SEV_CMD_INI= T"; struct psp_device *psp =3D psp_master; struct sev_device *sev; int rc =3D 0, psp_ret =3D -1; @@ -1008,18 +1009,23 @@ static int __sev_platform_init_locked(int *error) if (error) *error =3D psp_ret; =20 - if (rc) + if (rc) { + dev_err(sev->dev, "SEV: %s failed error %#x", cmd, psp_ret); return rc; + } =20 sev->state =3D SEV_STATE_INIT; =20 /* Prepare for first SEV guest launch after INIT */ wbinvd_on_all_cpus(); - rc =3D __sev_do_cmd_locked(SEV_CMD_DF_FLUSH, NULL, error); - if (rc) - return rc; + rc =3D __sev_do_cmd_locked(SEV_CMD_DF_FLUSH, NULL, &psp_ret); + if (error) + *error =3D psp_ret; =20 - dev_dbg(sev->dev, "SEV firmware initialized\n"); + if (rc) { + dev_err(sev->dev, "SEV: SEV_CMD_DF_FLUSH failed error %#x", psp_ret); + return rc; + } =20 dev_info(sev->dev, "SEV API:%d.%d build:%d\n", sev->api_major, sev->api_minor, sev->build); @@ -2354,8 +2360,7 @@ void sev_pci_init(void) /* Initialize the platform */ rc =3D sev_platform_init(&error); if (rc) - dev_err(sev->dev, "SEV: failed to INIT error %#x, rc %d\n", - error, rc); + dev_err(sev->dev, "SEV: failed to INIT rc %d\n", rc); =20 skip_legacy: dev_info(sev->dev, "SEV%s API:%d.%d build:%d\n", sev->snp_initialized ? --=20 2.38.1