diff options
| -rw-r--r-- | hw/i386/amd_iommu.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c index 1fd669fef8..7206bb09c2 100644 --- a/hw/i386/amd_iommu.c +++ b/hw/i386/amd_iommu.c @@ -807,7 +807,7 @@ static inline uint64_t amdvi_get_perms(uint64_t entry) AMDVI_DEV_PERM_SHIFT; } -/* a valid entry should have V = 1 and reserved bits honoured */ +/* validate that reserved bits are honoured */ static bool amdvi_validate_dte(AMDVIState *s, uint16_t devid, uint64_t *dte) { @@ -820,7 +820,7 @@ static bool amdvi_validate_dte(AMDVIState *s, uint16_t devid, return false; } - return dte[0] & AMDVI_DEV_VALID; + return true; } /* get a device table entry given the devid */ @@ -966,8 +966,12 @@ static void amdvi_do_translate(AMDVIAddressSpace *as, hwaddr addr, return; } - /* devices with V = 0 are not translated */ if (!amdvi_get_dte(s, devid, entry)) { + return; + } + + /* devices with V = 0 are not translated */ + if (!(entry[0] & AMDVI_DEV_VALID)) { goto out; } |