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authorJoerg Roedel <joro@8bytes.org>2013-04-09 21:06:18 +0400
committerJoerg Roedel <joro@8bytes.org>2013-04-19 22:52:34 +0400
commitdfbb6d476de5a7a6e9ed10d43f626caa669cfd28 (patch)
treea1f23cb3999e601698f7fafd89c2fbafb98ba58d /drivers/iommu/amd_iommu_init.c
parent440e899805411d827d4fcce9eb37bf2417c812db (diff)
downloadlinux-dfbb6d476de5a7a6e9ed10d43f626caa669cfd28.tar.xz
iommu/amd: Don't report firmware bugs with cmd-line ivrs overrides
When the IVRS entries for IOAPIC and HPET are overridden on the kernel command line, a problem detected in the check function might not be a firmware bug anymore. So disable the firmware bug reporting if the user provided valid ivrs_ioapic or ivrs_hpet entries on the command line. Reviewed-by: Shuah Khan <shuahkhan@gmail.com> Signed-off-by: Joerg Roedel <joro@8bytes.org>
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
-rw-r--r--drivers/iommu/amd_iommu_init.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c
index 030d6abf31e7..976794166481 100644
--- a/drivers/iommu/amd_iommu_init.c
+++ b/drivers/iommu/amd_iommu_init.c
@@ -219,6 +219,7 @@ static struct devid_map __initdata early_ioapic_map[EARLY_MAP_SIZE];
static struct devid_map __initdata early_hpet_map[EARLY_MAP_SIZE];
static int __initdata early_ioapic_map_size;
static int __initdata early_hpet_map_size;
+static bool __initdata cmdline_maps;
static enum iommu_init_state init_state = IOMMU_START_STATE;
@@ -1686,18 +1687,28 @@ static void __init free_on_init_error(void)
static bool __init check_ioapic_information(void)
{
+ const char *fw_bug = FW_BUG;
bool ret, has_sb_ioapic;
int idx;
has_sb_ioapic = false;
ret = false;
+ /*
+ * If we have map overrides on the kernel command line the
+ * messages in this function might not describe firmware bugs
+ * anymore - so be careful
+ */
+ if (cmdline_maps)
+ fw_bug = "";
+
for (idx = 0; idx < nr_ioapics; idx++) {
int devid, id = mpc_ioapic_id(idx);
devid = get_ioapic_devid(id);
if (devid < 0) {
- pr_err(FW_BUG "AMD-Vi: IOAPIC[%d] not in IVRS table\n", id);
+ pr_err("%sAMD-Vi: IOAPIC[%d] not in IVRS table\n",
+ fw_bug, id);
ret = false;
} else if (devid == IOAPIC_SB_DEVID) {
has_sb_ioapic = true;
@@ -1714,11 +1725,11 @@ static bool __init check_ioapic_information(void)
* when the BIOS is buggy and provides us the wrong
* device id for the IOAPIC in the system.
*/
- pr_err(FW_BUG "AMD-Vi: No southbridge IOAPIC found in IVRS table\n");
+ pr_err("%sAMD-Vi: No southbridge IOAPIC found\n", fw_bug);
}
if (!ret)
- pr_err("AMD-Vi: Disabling interrupt remapping due to BIOS Bug(s)\n");
+ pr_err("AMD-Vi: Disabling interrupt remapping\n");
return ret;
}
@@ -2166,6 +2177,7 @@ static int __init parse_ivrs_ioapic(char *str)
devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
+ cmdline_maps = true;
i = early_ioapic_map_size++;
early_ioapic_map[i].id = id;
early_ioapic_map[i].devid = devid;
@@ -2195,6 +2207,7 @@ static int __init parse_ivrs_hpet(char *str)
devid = ((bus & 0xff) << 8) | ((dev & 0x1f) << 3) | (fn & 0x7);
+ cmdline_maps = true;
i = early_hpet_map_size++;
early_hpet_map[i].id = id;
early_hpet_map[i].devid = devid;