diff options
| author |   Baoquan He <bhe@redhat.com> | 2017-08-09 16:33:39 +0800 |
|---|---|---|
| committer |   Joerg Roedel <jroedel@suse.de> | 2017-08-15 18:14:39 +0200 |
| commit | 53019a9e88cc14bae2780ba807faba87a5829891 (patch) | |
| tree | 10af6494953c6457329e48d034b4c6b6e12c7f8f /drivers/iommu/amd_iommu_init.c | |
| parent | iommu/amd: Copy old trans table from old kernel (diff) | |
| download | wireguard-linux-53019a9e88cc14bae2780ba807faba87a5829891.tar.xz wireguard-linux-53019a9e88cc14bae2780ba807faba87a5829891.zip | |
iommu/amd: Do sanity check for address translation and irq remap of old dev table entry
Firstly split the dev table entry copy into address translation part
and irq remapping part. Because these two parts could be enabled
independently.
Secondly do sanity check for address translation and irq remap of old
dev table entry separately.
Signed-off-by: Baoquan He <bhe@redhat.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
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); |