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authorLendacky, Thomas <Thomas.Lendacky@amd.com>2019-02-15 17:26:33 +0000
committerHerbert Xu <herbert@gondor.apana.org.au>2019-02-22 12:47:27 +0800
commit7df5218d66750ff5f84413ea307391bf9bbace1e (patch)
tree2a61674f83503ab8f35bfdff7d6037e4a28846d9 /drivers/crypto
parent333e664772c5b8cfd5c019e300b378cd9d1c5ae3 (diff)
downloadlinux-7df5218d66750ff5f84413ea307391bf9bbace1e.tar.bz2
crypto: ccp - Update driver messages to remove some confusion
The current content of some of the driver messages and the way that they are issued results in some confusion, especially in the area of the PSP as it relates to SEV support. If SEV is not supported, a message is issued that says "psp initialization failed." This makes it seem like there was a problem, when in fact, the PSP support is just disabled if SEV is not supported. Update the driver to check SEV support a bit earlier and issue a debug- level message if SEV is not supported, followed by a debug-level message that the PSP is disabled. This way you will only see PSP messages if SEV is supported or if debug information is desired. Also, remove the overall "enabled" and "disabled" messages for the driver and rely on the CCP and PSP support to issue component-specific messages. Signed-off-by: Tom Lendacky <thomas.lendacky@amd.com> Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Diffstat (limited to 'drivers/crypto')
-rw-r--r--drivers/crypto/ccp/psp-dev.c19
-rw-r--r--drivers/crypto/ccp/sp-pci.c4
2 files changed, 14 insertions, 9 deletions
diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c
index 638f138debd7..fadf859a14b8 100644
--- a/drivers/crypto/ccp/psp-dev.c
+++ b/drivers/crypto/ccp/psp-dev.c
@@ -858,15 +858,15 @@ static int sev_misc_init(struct psp_device *psp)
return 0;
}
-static int sev_init(struct psp_device *psp)
+static int psp_check_sev_support(struct psp_device *psp)
{
/* Check if device supports SEV feature */
if (!(ioread32(psp->io_regs + psp->vdata->feature_reg) & 1)) {
- dev_dbg(psp->dev, "device does not support SEV\n");
- return 1;
+ dev_dbg(psp->dev, "psp does not support SEV\n");
+ return -ENODEV;
}
- return sev_misc_init(psp);
+ return 0;
}
int psp_dev_init(struct sp_device *sp)
@@ -891,6 +891,10 @@ int psp_dev_init(struct sp_device *sp)
psp->io_regs = sp->io_map;
+ ret = psp_check_sev_support(psp);
+ if (ret)
+ goto e_disable;
+
/* Disable and clear interrupts until ready */
iowrite32(0, psp->io_regs + psp->vdata->inten_reg);
iowrite32(-1, psp->io_regs + psp->vdata->intsts_reg);
@@ -902,7 +906,7 @@ int psp_dev_init(struct sp_device *sp)
goto e_err;
}
- ret = sev_init(psp);
+ ret = sev_misc_init(psp);
if (ret)
goto e_irq;
@@ -924,6 +928,11 @@ e_err:
dev_notice(dev, "psp initialization failed\n");
return ret;
+
+e_disable:
+ sp->psp_data = NULL;
+
+ return ret;
}
void psp_dev_destroy(struct sp_device *sp)
diff --git a/drivers/crypto/ccp/sp-pci.c b/drivers/crypto/ccp/sp-pci.c
index 6d730d3e3f6f..41bce0a3f4bb 100644
--- a/drivers/crypto/ccp/sp-pci.c
+++ b/drivers/crypto/ccp/sp-pci.c
@@ -226,8 +226,6 @@ static int sp_pci_probe(struct pci_dev *pdev, const struct pci_device_id *id)
if (ret)
goto e_err;
- dev_notice(dev, "enabled\n");
-
return 0;
e_err:
@@ -246,8 +244,6 @@ static void sp_pci_remove(struct pci_dev *pdev)
sp_destroy(sp);
sp_free_irqs(sp);
-
- dev_notice(dev, "disabled\n");
}
#ifdef CONFIG_PM