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| author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-11-11 16:50:30 +0400 |
|---|---|---|
| committer | Konrad Rzeszutek Wilk <konrad.wilk@oracle.com> | 2013-11-11 21:48:58 +0400 |
| commit | 18c51e1a3fabb455ff1f5cd610097d89f577b8f7 (patch) | |
| tree | 5489d46bea7ecd8fc8713d8c59cde17372d96068 /arch/arm | |
| parent | ffc555be09bd2603abdbc6f8b64c6a7477facc48 (diff) | |
| download | linux-18c51e1a3fabb455ff1f5cd610097d89f577b8f7.tar.xz | |
xen/arm: pfn_to_mfn and mfn_to_pfn return the argument if nothing is in the p2m
Some common Xen drivers, like balloon.c, call pfn_to_mfn and mfn_to_pfn
even for autotranslate guests, expecting the argument back.
The following commit broke these drivers by changing the behavior of
pfn_to_mfn and mfn_to_pfn:
commit 4a19138c6505e224d9f4cc2fe9ada9188d7100ea
Author: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Date: Thu Oct 17 16:22:27 2013 +0000
arm/xen,arm64/xen: introduce p2m
They now return INVALID_P2M_ENTRY if Linux doesn't actually know what is
the mfn backing a pfn or what is the pfn corresponding to an mfn.
Fix the regression by switching to the old behavior.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Tested-by: Ian Campbell <ian.campbell@citrix.com>
Diffstat (limited to 'arch/arm')
| -rw-r--r-- | arch/arm/include/asm/xen/page.h | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/arch/arm/include/asm/xen/page.h b/arch/arm/include/asm/xen/page.h index 71bb779f2761..75579a9d6f76 100644 --- a/arch/arm/include/asm/xen/page.h +++ b/arch/arm/include/asm/xen/page.h @@ -46,10 +46,7 @@ static inline unsigned long pfn_to_mfn(unsigned long pfn) return mfn; } - if (xen_initial_domain()) - return pfn; - else - return INVALID_P2M_ENTRY; + return pfn; } static inline unsigned long mfn_to_pfn(unsigned long mfn) @@ -62,10 +59,7 @@ static inline unsigned long mfn_to_pfn(unsigned long mfn) return pfn; } - if (xen_initial_domain()) - return mfn; - else - return INVALID_P2M_ENTRY; + return mfn; } #define mfn_to_local_pfn(mfn) mfn_to_pfn(mfn) |