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| author | Mukesh Rathor <mukesh.rathor@oracle.com> | 2013-12-13 12:09:28 -0500 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2014-01-06 10:43:56 -0500 |
| commit | fc590efe667338f7da250cf2d2eb6fdd486e1b97 (patch) | |
| tree | 98b2188816d12912c94442d8ecbd6ea4f258efd4 /arch | |
| parent | 1fe565517b57676884349dccfd6ce853ec338636 (diff) | |
| download | linux-fc590efe667338f7da250cf2d2eb6fdd486e1b97.tar.gz linux-fc590efe667338f7da250cf2d2eb6fdd486e1b97.tar.bz2 linux-fc590efe667338f7da250cf2d2eb6fdd486e1b97.zip | |
xen/p2m: Check for auto-xlat when doing mfn_to_local_pfn.
Most of the functions in page.h are prefaced with
if (xen_feature(XENFEAT_auto_translated_physmap))
return mfn;
Except the mfn_to_local_pfn. At a first sight, the function
should work without this patch - as the 'mfn_to_mfn' has
a similar check. But there are no such check in the
'get_phys_to_machine' function - so we would crash in there.
This fixes it by following the convention of having the
check for auto-xlat in these static functions.
Signed-off-by: Mukesh Rathor <mukesh.rathor@oracle.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/x86/include/asm/xen/page.h | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h index b913915e8e63..4a092ccdd147 100644 --- a/arch/x86/include/asm/xen/page.h +++ b/arch/x86/include/asm/xen/page.h @@ -167,7 +167,12 @@ static inline xpaddr_t machine_to_phys(xmaddr_t machine) */ static inline unsigned long mfn_to_local_pfn(unsigned long mfn) { - unsigned long pfn = mfn_to_pfn(mfn); + unsigned long pfn; + + if (xen_feature(XENFEAT_auto_translated_physmap)) + return mfn; + + pfn = mfn_to_pfn(mfn); if (get_phys_to_machine(pfn) != mfn) return -1; /* force !pfn_valid() */ return pfn; |