diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/crypto/ccp/sev-dev.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c index f97166fba9..53b217a621 100644 --- a/drivers/crypto/ccp/sev-dev.c +++ b/drivers/crypto/ccp/sev-dev.c @@ -309,6 +309,7 @@ static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret) { struct psp_device *psp = psp_master; struct sev_device *sev; + unsigned int cmdbuff_hi, cmdbuff_lo; unsigned int phys_lsb, phys_msb; unsigned int reg, ret = 0; int buf_len; @@ -371,6 +372,19 @@ static int __sev_do_cmd_locked(int cmd, void *data, int *psp_ret) if (FIELD_GET(PSP_CMDRESP_STS, reg)) { dev_dbg(sev->dev, "sev command %#x failed (%#010lx)\n", cmd, FIELD_GET(PSP_CMDRESP_STS, reg)); + + /* + * PSP firmware may report additional error information in the + * command buffer registers on error. Print contents of command + * buffer registers if they changed. + */ + cmdbuff_hi = ioread32(sev->io_regs + sev->vdata->cmdbuff_addr_hi_reg); + cmdbuff_lo = ioread32(sev->io_regs + sev->vdata->cmdbuff_addr_lo_reg); + if (cmdbuff_hi != phys_msb || cmdbuff_lo != phys_lsb) { + dev_dbg(sev->dev, "Additional error information reported in cmdbuff:"); + dev_dbg(sev->dev, " cmdbuff hi: %#010x\n", cmdbuff_hi); + dev_dbg(sev->dev, " cmdbuff lo: %#010x\n", cmdbuff_lo); + } ret = -EIO; } else { ret = sev_write_init_ex_file_if_required(cmd); @@ -520,10 +534,16 @@ EXPORT_SYMBOL_GPL(sev_platform_init); static int __sev_platform_shutdown_locked(int *error) { - struct sev_device *sev = psp_master->sev_data; + struct psp_device *psp = psp_master; + struct sev_device *sev; int ret; - if (!sev || sev->state == SEV_STATE_UNINIT) + if (!psp || !psp->sev_data) + return 0; + + sev = psp->sev_data; + + if (sev->state == SEV_STATE_UNINIT) return 0; ret = __sev_do_cmd_locked(SEV_CMD_SHUTDOWN, NULL, error); |