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xen: restore vcpu_info mapping

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If we're using vcpu_info mapping, then make sure its restored on all
processors before relasing them from stop_machine.

The only complication is that if this fails, we can't continue because
we've already made assumptions that the mapping is available (baked in
calls to the _direct versions of the functions, for example).

Fortunately this can only happen with a 32-bit hypervisor, which may
possibly run out of mapping space.  On a 64-bit hypervisor, this is a
non-issue.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Jeremy Fitzhardinge
2008-05-31 01:33:02 +01:00
committed by Ingo Molnar
parent e2426cf85f
commit 9c7a794209
3 changed files with 33 additions and 2 deletions
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arch/x86/xen/xen-ops.h
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@ -26,6 +26,7 @@ char * __init xen_memory_setup(void);
void __init xen_arch_setup(void);
void __init xen_init_IRQ(void);
void xen_enable_sysenter(void);
void xen_vcpu_restore(void);
void __init xen_build_dynamic_phys_to_machine(void);