| Date | Thu, 01 Mar 2007 15:24:49 -0800 | From | Jeremy Fitzhardinge <> | Subject | [patch 06/26] Xen-paravirt_ops: paravirt_ops: allocate a fixmap slot |
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Allocate a fixmap slot for use by a paravirt_ops implementation. This is intended for early-boot bootstrap mappings. Once the zones and allocator have been set up, it would be better to use get_vm_area() to allocate some virtual space.
Xen uses this to map the hypervisor's shared info page, which doesn't have a pseudo-physical page number, and therefore can't be mapped ordinarily. It is needed early because it contains the vcpu state, including the interrupt mask.
Signed-off-by: Jeremy Fitzhardinge <jeremy@xensource.com>
--- include/asm-i386/fixmap.h | 3 +++ 1 file changed, 3 insertions(+)
=================================================================== --- a/include/asm-i386/fixmap.h +++ b/include/asm-i386/fixmap.h @@ -86,6 +86,9 @@ enum fixed_addresses { #ifdef CONFIG_PCI_MMCONFIG FIX_PCIE_MCFG, #endif +#ifdef CONFIG_PARAVIRT + FIX_PARAVIRT_BOOTMAP, +#endif __end_of_permanent_fixed_addresses, /* temporary boot-time mappings, used before ioremap() is functional */ #define NR_FIX_BTMAPS 16 --
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