diff options
Diffstat (limited to 'hw/i386/intel_iommu.c')
| -rw-r--r-- | hw/i386/intel_iommu.c | 42 |
1 files changed, 30 insertions, 12 deletions
diff --git a/hw/i386/intel_iommu.c b/hw/i386/intel_iommu.c index fb31de9416..b359efd6f9 100644 --- a/hw/i386/intel_iommu.c +++ b/hw/i386/intel_iommu.c @@ -722,6 +722,15 @@ static int vtd_iova_to_slpte(VTDContextEntry *ce, uint64_t iova, bool is_write, typedef int (*vtd_page_walk_hook)(IOMMUTLBEntry *entry, void *private); +static int vtd_page_walk_one(IOMMUTLBEntry *entry, int level, + vtd_page_walk_hook hook_fn, void *private) +{ + assert(hook_fn); + trace_vtd_page_walk_one(level, entry->iova, entry->translated_addr, + entry->addr_mask, entry->perm); + return hook_fn(entry, private); +} + /** * vtd_page_walk_level - walk over specific level for IOVA range * @@ -781,28 +790,37 @@ static int vtd_page_walk_level(dma_addr_t addr, uint64_t start, */ entry_valid = read_cur | write_cur; + entry.target_as = &address_space_memory; + entry.iova = iova & subpage_mask; + entry.perm = IOMMU_ACCESS_FLAG(read_cur, write_cur); + entry.addr_mask = ~subpage_mask; + if (vtd_is_last_slpte(slpte, level)) { - entry.target_as = &address_space_memory; - entry.iova = iova & subpage_mask; /* NOTE: this is only meaningful if entry_valid == true */ entry.translated_addr = vtd_get_slpte_addr(slpte, aw); - entry.addr_mask = ~subpage_mask; - entry.perm = IOMMU_ACCESS_FLAG(read_cur, write_cur); if (!entry_valid && !notify_unmap) { trace_vtd_page_walk_skip_perm(iova, iova_next); goto next; } - trace_vtd_page_walk_one(level, entry.iova, entry.translated_addr, - entry.addr_mask, entry.perm); - if (hook_fn) { - ret = hook_fn(&entry, private); - if (ret < 0) { - return ret; - } + ret = vtd_page_walk_one(&entry, level, hook_fn, private); + if (ret < 0) { + return ret; } } else { if (!entry_valid) { - trace_vtd_page_walk_skip_perm(iova, iova_next); + if (notify_unmap) { + /* + * The whole entry is invalid; unmap it all. + * Translated address is meaningless, zero it. + */ + entry.translated_addr = 0x0; + ret = vtd_page_walk_one(&entry, level, hook_fn, private); + if (ret < 0) { + return ret; + } + } else { + trace_vtd_page_walk_skip_perm(iova, iova_next); + } goto next; } ret = vtd_page_walk_level(vtd_get_slpte_addr(slpte, aw), iova, |