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Handle allocation/freeing > outside of the mutex instead. > > Co-developed-by: Ackerley Tng > Signed-off-by: Ackerley Tng > Signed-off-by: Michael Roth Reviewed-by: Tom Lendacky > --- > drivers/crypto/ccp/sev-dev.c | 62 ++++++++++++++++++------------------ > 1 file changed, 31 insertions(+), 31 deletions(-) > > diff --git a/drivers/crypto/ccp/sev-dev.c b/drivers/crypto/ccp/sev-dev.c > index 1e017783dd03..aa4f0fd731c0 100644 > --- a/drivers/crypto/ccp/sev-dev.c > +++ b/drivers/crypto/ccp/sev-dev.c > @@ -2532,8 +2532,8 @@ static int sev_ioctl_do_pdh_export(struct sev_issue_cmd *argp, bool writable) > return ret; > } > > -static int __sev_do_snp_platform_status(struct sev_user_data_snp_status *status, > - int *error) > +static int sev_do_snp_platform_status(struct sev_user_data_snp_status *status, > + int *error) > { > struct sev_device *sev = psp_master->sev_data; > void *data __free(free_page) = NULL; > @@ -2544,31 +2544,36 @@ static int __sev_do_snp_platform_status(struct sev_user_data_snp_status *status, > if (!data) > return -ENOMEM; > > - /* > - * SNP_PLATFORM_STATUS can be executed in any SNP state. But if executed > - * when SNP has been initialized, the status page must be firmware-owned. > - */ > - if (sev->snp_initialized) { > + scoped_guard(mutex, &sev_cmd_mutex) { > /* > - * Firmware expects the status page to be in Firmware state, > - * otherwise it will report an error INVALID_PAGE_STATE. > + * SNP_PLATFORM_STATUS can be executed in any SNP state. But if executed > + * when SNP has been initialized, the status page must be firmware-owned. > */ > - if (rmp_mark_pages_firmware(__pa(data), 1, true)) > - return -EFAULT; > - } > + if (sev->snp_initialized) { > + /* > + * Firmware expects the status page to be in Firmware state, > + * otherwise it will report an error INVALID_PAGE_STATE. > + */ > + if (rmp_mark_pages_firmware(__pa(data), 1, true)) > + return -EFAULT; > + } > > - buf.address = __psp_pa(data); > - ret = __sev_do_cmd_locked(SEV_CMD_SNP_PLATFORM_STATUS, &buf, error); > + buf.address = __psp_pa(data); > + ret = __sev_do_cmd_locked(SEV_CMD_SNP_PLATFORM_STATUS, &buf, error); > > - if (sev->snp_initialized) { > - /* > - * The status page will be in Reclaim state on success, or left > - * in Firmware state on failure. Use snp_reclaim_pages() to > - * transition either case back to Hypervisor-owned state. > - */ > - if (snp_reclaim_pages(__pa(data), 1, true)) { > - data = NULL; > - return -EFAULT; > + if (sev->snp_initialized) { > + /* > + * The status page will be in Reclaim state on success, or left > + * in Firmware state on failure. Use snp_reclaim_pages() to > + * transition either case back to Hypervisor-owned state. If > + * for some reason that fails, it will have been added to the > + * leaked pages list, so indicate to the caller to not free > + * the page. > + */ > + if (snp_reclaim_pages(__pa(data), 1, true)) { > + data = NULL; > + return -EFAULT; > + } > } > } > > @@ -2586,8 +2591,7 @@ static int sev_ioctl_do_snp_platform_status(struct sev_issue_cmd *argp) > if (!argp->data) > return -EINVAL; > > - scoped_guard(mutex, &sev_cmd_mutex) > - ret = __sev_do_snp_platform_status(&status, &argp->error); > + ret = sev_do_snp_platform_status(&status, &argp->error); > if (ret < 0) > return ret; > > @@ -3086,9 +3090,7 @@ static int get_v1_svn(struct sev_device *sev) > struct sev_user_data_snp_status status; > int ret, error = 0; > > - mutex_lock(&sev_cmd_mutex); > - ret = __sev_do_snp_platform_status(&status, &error); > - mutex_unlock(&sev_cmd_mutex); > + ret = sev_do_snp_platform_status(&status, &error); > if (ret < 0) > return ret; > > @@ -3103,9 +3105,7 @@ static int get_v2_svn(struct sev_device *sev) > struct sev_snp_tcb_version_turin *tcb; > int ret, error = 0; > > - mutex_lock(&sev_cmd_mutex); > - ret = __sev_do_snp_platform_status(&status, &error); > - mutex_unlock(&sev_cmd_mutex); > + ret = sev_do_snp_platform_status(&status, &error); > if (ret < 0) > return ret; >