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author | Scott Wood <scottwood@freescale.com> | 2011-12-20 15:34:43 +0000 |
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committer | Avi Kivity <avi@redhat.com> | 2012-04-08 12:51:19 +0300 |
commit | d30f6e480055e5be12e7a03fd11ea912a451daa5 (patch) | |
tree | e6c367e6f1da4da67b3a395a1a735a09e52067c0 /arch/powerpc/include/asm/kvm_ppc.h | |
parent | cfac57847a67c4903f34a77e971521531bbc7c77 (diff) | |
download | op-kernel-dev-d30f6e480055e5be12e7a03fd11ea912a451daa5.zip op-kernel-dev-d30f6e480055e5be12e7a03fd11ea912a451daa5.tar.gz |
KVM: PPC: booke: category E.HV (GS-mode) support
Chips such as e500mc that implement category E.HV in Power ISA 2.06
provide hardware virtualization features, including a new MSR mode for
guest state. The guest OS can perform many operations without trapping
into the hypervisor, including transitions to and from guest userspace.
Since we can use SRR1[GS] to reliably tell whether an exception came from
guest state, instead of messing around with IVPR, we use DO_KVM similarly
to book3s.
Current issues include:
- Machine checks from guest state are not routed to the host handler.
- The guest can cause a host oops by executing an emulated instruction
in a page that lacks read permission. Existing e500/4xx support has
the same problem.
Includes work by Ashish Kalra <Ashish.Kalra@freescale.com>,
Varun Sethi <Varun.Sethi@freescale.com>, and
Liu Yu <yu.liu@freescale.com>.
Signed-off-by: Scott Wood <scottwood@freescale.com>
[agraf: remove pt_regs usage]
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'arch/powerpc/include/asm/kvm_ppc.h')
-rw-r--r-- | arch/powerpc/include/asm/kvm_ppc.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/kvm_ppc.h b/arch/powerpc/include/asm/kvm_ppc.h index 731e920..e709975 100644 --- a/arch/powerpc/include/asm/kvm_ppc.h +++ b/arch/powerpc/include/asm/kvm_ppc.h @@ -139,6 +139,9 @@ extern int kvmppc_core_prepare_memory_region(struct kvm *kvm, extern void kvmppc_core_commit_memory_region(struct kvm *kvm, struct kvm_userspace_memory_region *mem); +extern int kvmppc_bookehv_init(void); +extern void kvmppc_bookehv_exit(void); + /* * Cuts out inst bits with ordering according to spec. * That means the leftmost bit is zero. All given bits are included. |