diff options
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 38 |
1 files changed, 38 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 3a210f0c1b3f..2a3b1b174d5e 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -213,6 +213,13 @@ enum iommu_init_state { IOMMU_INIT_ERROR, }; +/* Early ioapic and hpet maps from kernel command line */ +#define EARLY_MAP_SIZE 4 +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 enum iommu_init_state init_state = IOMMU_START_STATE; static int amd_iommu_enable_interrupts(void); @@ -738,6 +745,31 @@ static int __init add_special_device(u8 type, u8 id, u16 devid, bool cmd_line) return 0; } +static int __init add_early_maps(void) +{ + int i, ret; + + for (i = 0; i < early_ioapic_map_size; ++i) { + ret = add_special_device(IVHD_SPECIAL_IOAPIC, + early_ioapic_map[i].id, + early_ioapic_map[i].devid, + early_ioapic_map[i].cmd_line); + if (ret) + return ret; + } + + for (i = 0; i < early_hpet_map_size; ++i) { + ret = add_special_device(IVHD_SPECIAL_HPET, + early_hpet_map[i].id, + early_hpet_map[i].devid, + early_hpet_map[i].cmd_line); + if (ret) + return ret; + } + + return 0; +} + /* * Reads the device exclusion range from ACPI and initializes the IOMMU with * it @@ -774,6 +806,12 @@ static int __init init_iommu_from_acpi(struct amd_iommu *iommu, u32 dev_i, ext_flags = 0; bool alias = false; struct ivhd_entry *e; + int ret; + + + ret = add_early_maps(); + if (ret) + return ret; /* * First save the recommended feature enable bits from ACPI |