diff options
Diffstat (limited to 'drivers/iommu/amd_iommu_init.c')
| -rw-r--r-- | drivers/iommu/amd_iommu_init.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/iommu/amd_iommu_init.c b/drivers/iommu/amd_iommu_init.c index 959c25d997e1..d08ad74b0928 100644 --- a/drivers/iommu/amd_iommu_init.c +++ b/drivers/iommu/amd_iommu_init.c @@ -852,12 +852,12 @@ static int get_dev_entry_bit(u16 devid, u8 bit) static bool copy_device_table(void) { + u64 int_ctl, int_tab_len, entry, last_entry = 0; struct dev_table_entry *old_devtb = NULL; u32 lo, hi, devid, old_devtb_size; phys_addr_t old_devtb_phys; - u64 entry, last_entry = 0; struct amd_iommu *iommu; - u16 dom_id, dte_v; + u16 dom_id, dte_v, irq_v; gfp_t gfp_flag; if (!amd_iommu_pre_enabled) @@ -901,8 +901,25 @@ static bool copy_device_table(void) old_dev_tbl_cpy[devid] = old_devtb[devid]; dom_id = old_devtb[devid].data[1] & DEV_DOMID_MASK; dte_v = old_devtb[devid].data[0] & DTE_FLAG_V; - if (dte_v && dom_id) + + if (dte_v && dom_id) { + old_dev_tbl_cpy[devid].data[0] = old_devtb[devid].data[0]; + old_dev_tbl_cpy[devid].data[1] = old_devtb[devid].data[1]; __set_bit(dom_id, amd_iommu_pd_alloc_bitmap); + } + + irq_v = old_devtb[devid].data[2] & DTE_IRQ_REMAP_ENABLE; + int_ctl = old_devtb[devid].data[2] & DTE_IRQ_REMAP_INTCTL_MASK; + int_tab_len = old_devtb[devid].data[2] & DTE_IRQ_TABLE_LEN_MASK; + if (irq_v && (int_ctl || int_tab_len)) { + if ((int_ctl != DTE_IRQ_REMAP_INTCTL) || + (int_tab_len != DTE_IRQ_TABLE_LEN)) { + pr_err("Wrong old irq remapping flag: %#x\n", devid); + return false; + } + + old_dev_tbl_cpy[devid].data[2] = old_devtb[devid].data[2]; + } } memunmap(old_devtb); |