[Xen-devel] [patch 05/20] XEN-paravirt: paravirt: reserve fixmap slot

[Jeremy Fitzhardinge <jeremy@xxxxxxxx>]

Reserve a new fixmap slot for paravirt backends.  Xen uses this for
mapping the hypervisor shared-info page, which doesn't really exist in
the guest address space.

Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Cc: Chris Wright <chris@xxxxxxxxxxxx>
Cc: Zachary Amsden <zach@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxx>
Cc: Rusty Russell <rusty@xxxxxxxxxxxxxxx>

===================================================================
--- 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,
+#endif
        __end_of_permanent_fixed_addresses,
        /* temporary boot-time mappings, used before ioremap() is functional */
 #define NR_FIX_BTMAPS  16

-- 


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