From 83bf42510d7f7e1daa692c096e8e9919334d7b57 Mon Sep 17 00:00:00 2001 From: David Rientjes Date: Fri, 12 Jul 2019 13:41:58 -0700 Subject: crypto: ccp - Fix SEV_VERSION_GREATER_OR_EQUAL SEV_VERSION_GREATER_OR_EQUAL() will fail if upgrading from 2.2 to 3.1, for example, because the minor version is not equal to or greater than the major. Fix this and move to a static inline function for appropriate type checking. Fixes: edd303ff0e9e ("crypto: ccp - Add DOWNLOAD_FIRMWARE SEV command") Reported-by: Cfir Cohen Signed-off-by: David Rientjes Acked-by: Tom Lendacky Acked-by: Gary R Hook Signed-off-by: Herbert Xu --- drivers/crypto/ccp/psp-dev.c | 19 ++++++++++++------- 1 file changed, 12 insertions(+), 7 deletions(-) (limited to 'drivers/crypto/ccp/psp-dev.c') diff --git a/drivers/crypto/ccp/psp-dev.c b/drivers/crypto/ccp/psp-dev.c index 3e712f385bc1..2ff87b4d9348 100644 --- a/drivers/crypto/ccp/psp-dev.c +++ b/drivers/crypto/ccp/psp-dev.c @@ -24,10 +24,6 @@ #include "sp-dev.h" #include "psp-dev.h" -#define SEV_VERSION_GREATER_OR_EQUAL(_maj, _min) \ - ((psp_master->api_major) >= _maj && \ - (psp_master->api_minor) >= _min) - #define DEVICE_NAME "sev" #define SEV_FW_FILE "amd/sev.fw" #define SEV_FW_NAME_SIZE 64 @@ -47,6 +43,15 @@ MODULE_PARM_DESC(psp_probe_timeout, " default timeout value, in seconds, during static bool psp_dead; static int psp_timeout; +static inline bool sev_version_greater_or_equal(u8 maj, u8 min) +{ + if (psp_master->api_major > maj) + return true; + if (psp_master->api_major == maj && psp_master->api_minor >= min) + return true; + return false; +} + static struct psp_device *psp_alloc_struct(struct sp_device *sp) { struct device *dev = sp->dev; @@ -588,7 +593,7 @@ static int sev_ioctl_do_get_id2(struct sev_issue_cmd *argp) int ret; /* SEV GET_ID is available from SEV API v0.16 and up */ - if (!SEV_VERSION_GREATER_OR_EQUAL(0, 16)) + if (!sev_version_greater_or_equal(0, 16)) return -ENOTSUPP; if (copy_from_user(&input, (void __user *)argp->data, sizeof(input))) @@ -651,7 +656,7 @@ static int sev_ioctl_do_get_id(struct sev_issue_cmd *argp) int ret; /* SEV GET_ID available from SEV API v0.16 and up */ - if (!SEV_VERSION_GREATER_OR_EQUAL(0, 16)) + if (!sev_version_greater_or_equal(0, 16)) return -ENOTSUPP; /* SEV FW expects the buffer it fills with the ID to be @@ -1053,7 +1058,7 @@ void psp_pci_init(void) psp_master->sev_state = SEV_STATE_UNINIT; } - if (SEV_VERSION_GREATER_OR_EQUAL(0, 15) && + if (sev_version_greater_or_equal(0, 15) && sev_update_firmware(psp_master->dev) == 0) sev_get_api_version(); -- cgit v1.2.3-59-g8ed1b