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KVM: PPC: Convert SRR0 and SRR1 to shared page

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The SRR0 and SRR1 registers contain cached values of the PC and MSR
respectively. They get written to by the hypervisor when an interrupt
occurs or directly by the kernel. They are also used to tell the rfi(d)
instruction where to jump to.

Because it only gets touched on defined events that, it's very simple to
share with the guest. Hypervisor and guest both have full r/w access.

This patch converts all users of the current field to the shared page.

Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Alexander Graf 2010-07-29 14:47:46 +02:00 • committed by Avi Kivity
parent 5e030186df
commit de7906c36c
7 changed files with 28 additions and 23 deletions
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2
arch/powerpc/include/asm/kvm_para.h
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@ -23,6 +23,8 @@
#include <linux/types.h>
struct kvm_vcpu_arch_shared {
__u64 srr0;
__u64 srr1;
__u64 dar;
__u64 msr;
__u32 dsisr;