diff options
| author |   Ian Campbell <ian.campbell@citrix.com> | 2010-09-30 12:37:26 +0100 |
|---|---|---|
| committer |   Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com> | 2010-11-12 15:00:06 -0800 |
| commit | 7e77506a5918d82cafa2ffa783ab57c23f9e9817 (patch) | |
| tree | dc922c1127c8859cda50f5cbed654c5681a89480 /arch/x86/include/asm/xen/page.h | |
| parent | xen: do not release any memory under 1M in domain 0 (diff) | |
| download | linux-dev-7e77506a5918d82cafa2ffa783ab57c23f9e9817.tar.xz linux-dev-7e77506a5918d82cafa2ffa783ab57c23f9e9817.zip | |
xen: implement XENMEM_machphys_mapping
This hypercall allows Xen to specify a non-default location for the
machine to physical mapping. This capability is used when running a 32
bit domain 0 on a 64 bit hypervisor to shrink the hypervisor hole to
exactly the size required.
[ Impact: add Xen hypercall definitions ]
Signed-off-by: Ian Campbell <ian.campbell@citrix.com>
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Diffstat (limited to 'arch/x86/include/asm/xen/page.h')
| -rw-r--r-- | arch/x86/include/asm/xen/page.h | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/arch/x86/include/asm/xen/page.h b/arch/x86/include/asm/xen/page.h index dd8c1414b3d5..8760cc60a21c 100644 --- a/arch/x86/include/asm/xen/page.h +++ b/arch/x86/include/asm/xen/page.h @@ -5,6 +5,7 @@ #include <linux/types.h> #include <linux/spinlock.h> #include <linux/pfn.h> +#include <linux/mm.h> #include <asm/uaccess.h> #include <asm/page.h> @@ -35,6 +36,8 @@ typedef struct xpaddr { #define MAX_DOMAIN_PAGES \ ((unsigned long)((u64)CONFIG_XEN_MAX_DOMAIN_MEMORY * 1024 * 1024 * 1024 / PAGE_SIZE)) +extern unsigned long *machine_to_phys_mapping; +extern unsigned int machine_to_phys_order; extern unsigned long get_phys_to_machine(unsigned long pfn); extern bool set_phys_to_machine(unsigned long pfn, unsigned long mfn); @@ -69,10 +72,8 @@ static inline unsigned long mfn_to_pfn(unsigned long mfn) if (xen_feature(XENFEAT_auto_translated_physmap)) return mfn; -#if 0 if (unlikely((mfn >> machine_to_phys_order) != 0)) - return max_mapnr; -#endif + return ~0; pfn = 0; /* |