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powerpc/kvm: Sync guest visible MMU state

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Currently userspace has no chance to find out which virtual address space we're
in and resolve addresses. While that is a big problem for migration, it's also
unpleasent when debugging, as gdb and the monitor don't work on virtual
addresses.

This patch exports enough of the MMU segment state to userspace to make
debugging work and thus also includes the groundwork for migration.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Alexander Graf
2009-11-30 03:02:02 +00:00
committed by Benjamin Herrenschmidt
parent c0cefebc0b
commit e15a113700
8 changed files with 101 additions and 16 deletions
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arch/powerpc/include/asm/kvm_asm.h
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@@ -87,6 +87,7 @@
#define BOOK3S_IRQPRIO_MAX 16
#define BOOK3S_HFLAG_DCBZ32 0x1
#define BOOK3S_HFLAG_SLB 0x2
#define RESUME_FLAG_NV (1<<0) /* Reload guest nonvolatile state? */
#define RESUME_FLAG_HOST (1<<1) /* Resume host? */