diff options
| author | David Vrabel <david.vrabel@citrix.com> | 2014-01-08 18:00:01 +0400 |
|---|---|---|
| committer | David Vrabel <david.vrabel@citrix.com> | 2014-05-15 19:16:40 +0400 |
| commit | f59c5145dc6a079b14b349c388d44362eb813cdf (patch) | |
| tree | ff2b459c8fe1b90a38ee6e86f69aa3dc49db8651 /arch | |
| parent | 25b884a83d487fd62c3de7ac1ab5549979188482 (diff) | |
| download | linux-f59c5145dc6a079b14b349c388d44362eb813cdf.tar.xz | |
x86/xen: do not use _PAGE_IOMAP in xen_remap_domain_mfn_range()
_PAGE_IOMAP is used in xen_remap_domain_mfn_range() to prevent the
pfn_pte() call in remap_area_mfn_pte_fn() from using the p2m to translate
the MFN. If mfn_pte() is used instead, the p2m look up is avoided and
the use of _PAGE_IOMAP is no longer needed.
Signed-off-by: David Vrabel <david.vrabel@citrix.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Tested-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/xen/mmu.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/x86/xen/mmu.c b/arch/x86/xen/mmu.c index 86e02eabb640..d91602424b39 100644 --- a/arch/x86/xen/mmu.c +++ b/arch/x86/xen/mmu.c @@ -2522,7 +2522,7 @@ static int remap_area_mfn_pte_fn(pte_t *ptep, pgtable_t token, unsigned long addr, void *data) { struct remap_data *rmd = data; - pte_t pte = pte_mkspecial(pfn_pte(rmd->mfn++, rmd->prot)); + pte_t pte = pte_mkspecial(mfn_pte(rmd->mfn++, rmd->prot)); rmd->mmu_update->ptr = virt_to_machine(ptep).maddr; rmd->mmu_update->val = pte_val_ma(pte); @@ -2547,8 +2547,6 @@ int xen_remap_domain_mfn_range(struct vm_area_struct *vma, if (xen_feature(XENFEAT_auto_translated_physmap)) return -EINVAL; - prot = __pgprot(pgprot_val(prot) | _PAGE_IOMAP); - BUG_ON(!((vma->vm_flags & (VM_PFNMAP | VM_IO)) == (VM_PFNMAP | VM_IO))); rmd.mfn = mfn; |