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| 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/interface_32.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/interface_32.h')
| -rw-r--r-- | arch/x86/include/asm/xen/interface_32.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/xen/interface_32.h b/arch/x86/include/asm/xen/interface_32.h index 42a7e004ae5c..8413688b2571 100644 --- a/arch/x86/include/asm/xen/interface_32.h +++ b/arch/x86/include/asm/xen/interface_32.h @@ -32,6 +32,11 @@ /* And the trap vector is... */ #define TRAP_INSTR "int $0x82" +#define __MACH2PHYS_VIRT_START 0xF5800000 +#define __MACH2PHYS_VIRT_END 0xF6800000 + +#define __MACH2PHYS_SHIFT 2 + /* * Virtual addresses beyond this are not modifiable by guest OSes. The * machine->physical mapping table starts at this address, read-only. |