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authorTvrtko Ursulin <tvrtko.ursulin@intel.com>2021-10-14 13:38:31 +0800
committerJoerg Roedel <jroedel@suse.de>2021-10-18 12:31:48 +0200
commit5240aed2cd2594fb392239f11b9681e5e1591619 (patch)
tree59869db539fc254f1207e309178ef07788fb3558 /drivers/iommu
parent9e1ff307c779ce1f0f810c7ecce3d95bbae40896 (diff)
iommu/vt-d: Do not falsely log intel_iommu is unsupported kernel option
Handling of intel_iommu kernel command line option should return "true" to indicate option is valid and so avoid logging it as unknown by the core parsing code. Also log unknown sub-options at the notice level to let user know of potential typos or similar. Reported-by: Eero Tamminen <eero.t.tamminen@intel.com> Signed-off-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com> Link: https://lore.kernel.org/r/20210831112947.310080-1-tvrtko.ursulin@linux.intel.com Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> Link: https://lore.kernel.org/r/20211014053839.727419-2-baolu.lu@linux.intel.com Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu')
-rw-r--r--drivers/iommu/intel/iommu.c6
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index d75f59ae28e6..9a356075d345 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -412,6 +412,7 @@ static int __init intel_iommu_setup(char *str)
{
if (!str)
return -EINVAL;
+
while (*str) {
if (!strncmp(str, "on", 2)) {
dmar_disabled = 0;
@@ -441,13 +442,16 @@ static int __init intel_iommu_setup(char *str)
} else if (!strncmp(str, "tboot_noforce", 13)) {
pr_info("Intel-IOMMU: not forcing on after tboot. This could expose security risk for tboot\n");
intel_iommu_tboot_noforce = 1;
+ } else {
+ pr_notice("Unknown option - '%s'\n", str);
}
str += strcspn(str, ",");
while (*str == ',')
str++;
}
- return 0;
+
+ return 1;
}
__setup("intel_iommu=", intel_iommu_setup);