diff options
| -rw-r--r-- | target/ppc/mmu-radix64.c | 28 |
1 files changed, 24 insertions, 4 deletions
diff --git a/target/ppc/mmu-radix64.c b/target/ppc/mmu-radix64.c index 705bff76be..00f2e9fa2e 100644 --- a/target/ppc/mmu-radix64.c +++ b/target/ppc/mmu-radix64.c @@ -265,7 +265,7 @@ static int ppc_radix64_next_level(AddressSpace *as, vaddr eaddr, uint64_t *pte_addr, uint64_t *nls, int *psize, uint64_t *pte, int *fault_cause) { - uint64_t index, pde; + uint64_t index, mask, nlb, pde; /* Read page <directory/table> entry from guest address space */ pde = ldq_phys(as, *pte_addr); @@ -280,7 +280,17 @@ static int ppc_radix64_next_level(AddressSpace *as, vaddr eaddr, *nls = pde & R_PDE_NLS; index = eaddr >> (*psize - *nls); /* Shift */ index &= ((1UL << *nls) - 1); /* Mask */ - *pte_addr = (pde & R_PDE_NLB) + (index * sizeof(pde)); + nlb = pde & R_PDE_NLB; + mask = MAKE_64BIT_MASK(0, *nls + 3); + + if (nlb & mask) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: misaligned page dir/table base: 0x"TARGET_FMT_lx + " page dir size: 0x"TARGET_FMT_lx"\n", + __func__, nlb, mask + 1); + nlb &= ~mask; + } + *pte_addr = nlb + index * sizeof(pde); } return 0; } @@ -294,8 +304,18 @@ static int ppc_radix64_walk_tree(AddressSpace *as, vaddr eaddr, int level = 0; index = eaddr >> (*psize - nls); /* Shift */ - index &= ((1UL << nls) - 1); /* Mask */ - *pte_addr = base_addr + (index * sizeof(pde)); + index &= ((1UL << nls) - 1); /* Mask */ + mask = MAKE_64BIT_MASK(0, nls + 3); + + if (base_addr & mask) { + qemu_log_mask(LOG_GUEST_ERROR, + "%s: misaligned page dir base: 0x"TARGET_FMT_lx + " page dir size: 0x"TARGET_FMT_lx"\n", + __func__, base_addr, mask + 1); + base_addr &= ~mask; + } + *pte_addr = base_addr + index * sizeof(pde); + do { int ret; |