diff options
Diffstat (limited to 'arch/x86/xen/mmu_pv.c')
| -rw-r--r-- | arch/x86/xen/mmu_pv.c | 24 |
1 files changed, 17 insertions, 7 deletions
diff --git a/arch/x86/xen/mmu_pv.c b/arch/x86/xen/mmu_pv.c index a0e2b8c6e5c7..d85076223a69 100644 --- a/arch/x86/xen/mmu_pv.c +++ b/arch/x86/xen/mmu_pv.c @@ -315,7 +315,7 @@ void xen_ptep_modify_prot_commit(struct mm_struct *mm, unsigned long addr, static pteval_t pte_mfn_to_pfn(pteval_t val) { if (val & _PAGE_PRESENT) { - unsigned long mfn = (val & PTE_PFN_MASK) >> PAGE_SHIFT; + unsigned long mfn = (val & XEN_PTE_MFN_MASK) >> PAGE_SHIFT; unsigned long pfn = mfn_to_pfn(mfn); pteval_t flags = val & PTE_FLAGS_MASK; @@ -1325,20 +1325,18 @@ static void xen_flush_tlb_others(const struct cpumask *cpus, { struct { struct mmuext_op op; -#ifdef CONFIG_SMP - DECLARE_BITMAP(mask, num_processors); -#else DECLARE_BITMAP(mask, NR_CPUS); -#endif } *args; struct multicall_space mcs; + const size_t mc_entry_size = sizeof(args->op) + + sizeof(args->mask[0]) * BITS_TO_LONGS(num_possible_cpus()); trace_xen_mmu_flush_tlb_others(cpus, info->mm, info->start, info->end); if (cpumask_empty(cpus)) return; /* nothing to do */ - mcs = xen_mc_entry(sizeof(*args)); + mcs = xen_mc_entry(mc_entry_size); args = mcs.args; args->op.arg2.vcpumask = to_cpumask(args->mask); @@ -1721,7 +1719,7 @@ static unsigned long __init m2p(phys_addr_t maddr) { phys_addr_t paddr; - maddr &= PTE_PFN_MASK; + maddr &= XEN_PTE_MFN_MASK; paddr = mfn_to_pfn(maddr >> PAGE_SHIFT) << PAGE_SHIFT; return paddr; @@ -1902,6 +1900,18 @@ void __init xen_setup_kernel_pagetable(pgd_t *pgd, unsigned long max_pfn) /* Graft it onto L4[511][510] */ copy_page(level2_kernel_pgt, l2); + /* + * Zap execute permission from the ident map. Due to the sharing of + * L1 entries we need to do this in the L2. + */ + if (__supported_pte_mask & _PAGE_NX) { + for (i = 0; i < PTRS_PER_PMD; ++i) { + if (pmd_none(level2_ident_pgt[i])) + continue; + level2_ident_pgt[i] = pmd_set_flags(level2_ident_pgt[i], _PAGE_NX); + } + } + /* Copy the initial P->M table mappings if necessary. */ i = pgd_index(xen_start_info->mfn_list); if (i && i < pgd_index(__START_KERNEL_map)) |