diff options
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 27 |
1 files changed, 24 insertions, 3 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 2d923fe7c2a1..f8a222b0ac3f 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -33,6 +33,7 @@ #include <asm/gart.h> #include <asm/x86_init.h> #include <asm/iommu_table.h> +#include <asm/io_apic.h> #include "amd_iommu_proto.h" #include "amd_iommu_types.h" @@ -1575,6 +1576,23 @@ static void __init free_on_init_error(void) #endif } +static bool __init check_ioapic_information(void) +{ + int idx; + + for (idx = 0; idx < nr_ioapics; idx++) { + int id = mpc_ioapic_id(idx); + + if (get_ioapic_devid(id) < 0) { + pr_err(FW_BUG "AMD-Vi: IO-APIC[%d] not in IVRS table\n", id); + pr_err("AMD-Vi: Disabling interrupt remapping due to BIOS Bug\n"); + return false; + } + } + + return true; +} + /* * This is the hardware init function for AMD IOMMU in the system. * This function is called either from amd_iommu_init or from the interrupt @@ -1661,9 +1679,6 @@ static int __init early_amd_iommu_init(void) if (amd_iommu_pd_alloc_bitmap == NULL) goto out; - /* init the device table */ - init_device_table(); - /* * let all alias entries point to itself */ @@ -1686,6 +1701,9 @@ static int __init early_amd_iommu_init(void) if (ret) goto out; + if (amd_iommu_irq_remap) + amd_iommu_irq_remap = check_ioapic_information(); + if (amd_iommu_irq_remap) { /* * Interrupt remapping enabled, create kmem_cache for the @@ -1709,6 +1727,9 @@ static int __init early_amd_iommu_init(void) if (ret) goto out; + /* init the device table */ + init_device_table(); + out: /* Don't leak any ACPI memory */ early_acpi_os_unmap_memory((char __iomem *)ivrs_base, ivrs_size); |
