diff options
| author | David Woodhouse <David.Woodhouse@intel.com> | 2009-12-02 09:20:27 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2009-12-18 14:05:54 -0800 |
| commit | b02375be25be8895f1fdb63a0962fd465d88f998 (patch) | |
| tree | 94fb0eb33e179da804548a371cce1804c6c50084 | |
| parent | 518cdfa0f604c285cdb71e1f2e2e14773f80bb01 (diff) | |
intel-iommu: Apply BIOS sanity checks for interrupt remapping too.
commit 6ecbf01c7ce4c0f4c3bdfa0e64ac6258328fda6c upstream.
The BIOS errors where an IOMMU is reported either at zero or a bogus
address are causing problems even when the IOMMU is disabled -- because
interrupt remapping uses the same hardware. Ensure that the checks get
applied for the interrupt remapping initialisation too.
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
| -rw-r--r-- | drivers/pci/dmar.c | 33 |
1 files changed, 26 insertions, 7 deletions
diff --git a/drivers/pci/dmar.c b/drivers/pci/dmar.c index ef58a0a2eaaf..57530361f15d 100644 --- a/drivers/pci/dmar.c +++ b/drivers/pci/dmar.c @@ -582,6 +582,8 @@ int __init dmar_table_init(void) return 0; } +static int bios_warned; + int __init check_zero_address(void) { struct acpi_table_dmar *dmar; @@ -612,6 +614,7 @@ int __init check_zero_address(void) dmi_get_system_info(DMI_BIOS_VENDOR), dmi_get_system_info(DMI_BIOS_VERSION), dmi_get_system_info(DMI_PRODUCT_VERSION)); + bios_warned = 1; goto failed; } @@ -631,6 +634,7 @@ int __init check_zero_address(void) dmi_get_system_info(DMI_BIOS_VENDOR), dmi_get_system_info(DMI_BIOS_VERSION), dmi_get_system_info(DMI_PRODUCT_VERSION)); + bios_warned = 1; goto failed; } } @@ -688,6 +692,18 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) int agaw = 0; int msagaw = 0; + if (!drhd->reg_base_addr) { + if (!bios_warned) { + WARN(1, "Your BIOS is broken; DMAR reported at address zero!\n" + "BIOS vendor: %s; Ver: %s; Product Version: %s\n", + dmi_get_system_info(DMI_BIOS_VENDOR), + dmi_get_system_info(DMI_BIOS_VERSION), + dmi_get_system_info(DMI_PRODUCT_VERSION)); + bios_warned = 1; + } + return -EINVAL; + } + iommu = kzalloc(sizeof(*iommu), GFP_KERNEL); if (!iommu) return -ENOMEM; @@ -704,13 +720,16 @@ int alloc_iommu(struct dmar_drhd_unit *drhd) iommu->ecap = dmar_readq(iommu->reg + DMAR_ECAP_REG); if (iommu->cap == (uint64_t)-1 && iommu->ecap == (uint64_t)-1) { - /* Promote an attitude of violence to a BIOS engineer today */ - WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n" - "BIOS vendor: %s; Ver: %s; Product Version: %s\n", - drhd->reg_base_addr, - dmi_get_system_info(DMI_BIOS_VENDOR), - dmi_get_system_info(DMI_BIOS_VERSION), - dmi_get_system_info(DMI_PRODUCT_VERSION)); + if (!bios_warned) { + /* Promote an attitude of violence to a BIOS engineer today */ + WARN(1, "Your BIOS is broken; DMAR reported at address %llx returns all ones!\n" + "BIOS vendor: %s; Ver: %s; Product Version: %s\n", + drhd->reg_base_addr, + dmi_get_system_info(DMI_BIOS_VENDOR), + dmi_get_system_info(DMI_BIOS_VERSION), + dmi_get_system_info(DMI_PRODUCT_VERSION)); + bios_warned = 1; + } goto err_unmap; } |