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| author | Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-02-04 23:46:34 +0100 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2010-06-07 20:32:33 +0200 |
| commit | c0011dbfce69467b23b08fb4a64c39a409a935fb (patch) | |
| tree | 47ecf9ee630f58d49edd2fd18fdc0159eb486392 /arch/x86/include/asm/xen | |
| parent | Linus 2.6.34 (diff) | |
| download | linux-c0011dbfce69467b23b08fb4a64c39a409a935fb.tar.xz linux-c0011dbfce69467b23b08fb4a64c39a409a935fb.zip | |
xen: use _PAGE_IOMAP in ioremap to do machine mappings
In a Xen domain, ioremap operates on machine addresses, not
pseudo-physical addresses. We use _PAGE_IOMAP to determine whether a
mapping is intended for machine addresses.
[ Impact: allow Xen domain to map real hardware ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/include/asm/xen')
| -rw-r--r-- | arch/x86/include/asm/xen/page.h | 8 |
1 files changed, 2 insertions, 6 deletions
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h index 018a0a400799..bf5f7d32bd08 100644 --- a/arch/x86/include/asm/xen/page.h +++ b/arch/x86/include/asm/xen/page.h @@ -112,13 +112,9 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine) */ static inline unsigned long mfn_to_local_pfn(unsigned long mfn) { - extern unsigned long max_mapnr; unsigned long pfn = mfn_to_pfn(mfn); - if ((pfn < max_mapnr) - && !xen_feature(XENFEAT_auto_translated_physmap) - && (get_phys_to_machine(pfn) != mfn)) - return max_mapnr; /* force !pfn_valid() */ - /* XXX fixme; not true with sparsemem */ + if (get_phys_to_machine(pfn) != mfn) + return -1; /* force !pfn_valid() */ return pfn; } |