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>

1 files changed, 13 insertions, 2 deletions

diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index 34b8afe94a50..bbede5882c5b 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -116,6 +116,9 @@ int main(void)
 #ifdef CONFIG_KVM_BOOK3S_32_HANDLER
         DEFINE(THREAD_KVM_SVCPU, offsetof(struct thread_struct, kvm_shadow_vcpu));
 #endif
+#ifdef CONFIG_KVM_BOOKE_HV
+        DEFINE(THREAD_KVM_VCPU, offsetof(struct thread_struct, kvm_vcpu));
+#endif
 
         DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
         DEFINE(TI_LOCAL_FLAGS, offsetof(struct thread_info, local_flags));
@@ -387,6 +390,7 @@ int main(void)
 #ifdef CONFIG_KVM
         DEFINE(VCPU_HOST_STACK, offsetof(struct kvm_vcpu, arch.host_stack));
         DEFINE(VCPU_HOST_PID, offsetof(struct kvm_vcpu, arch.host_pid));
+        DEFINE(VCPU_GUEST_PID, offsetof(struct kvm_vcpu, arch.pid));
         DEFINE(VCPU_GPRS, offsetof(struct kvm_vcpu, arch.gpr));
         DEFINE(VCPU_VRSAVE, offsetof(struct kvm_vcpu, arch.vrsave));
         DEFINE(VCPU_FPRS, offsetof(struct kvm_vcpu, arch.fpr));
@@ -429,9 +433,11 @@ int main(void)
         DEFINE(VCPU_SHARED_MAS4, offsetof(struct kvm_vcpu_arch_shared, mas4));
         DEFINE(VCPU_SHARED_MAS6, offsetof(struct kvm_vcpu_arch_shared, mas6));
 
+        DEFINE(VCPU_KVM, offsetof(struct kvm_vcpu, kvm));
+        DEFINE(KVM_LPID, offsetof(struct kvm, arch.lpid));
+
         /* book3s */
 #ifdef CONFIG_KVM_BOOK3S_64_HV
-        DEFINE(KVM_LPID, offsetof(struct kvm, arch.lpid));
         DEFINE(KVM_SDR1, offsetof(struct kvm, arch.sdr1));
         DEFINE(KVM_HOST_LPID, offsetof(struct kvm, arch.host_lpid));
         DEFINE(KVM_HOST_LPCR, offsetof(struct kvm, arch.host_lpcr));
@@ -446,7 +452,6 @@ int main(void)
         DEFINE(VCPU_DAR, offsetof(struct kvm_vcpu, arch.shregs.dar));
 #endif
 #ifdef CONFIG_PPC_BOOK3S
-        DEFINE(VCPU_KVM, offsetof(struct kvm_vcpu, kvm));
         DEFINE(VCPU_VCPUID, offsetof(struct kvm_vcpu, vcpu_id));
         DEFINE(VCPU_PURR, offsetof(struct kvm_vcpu, arch.purr));
         DEFINE(VCPU_SPURR, offsetof(struct kvm_vcpu, arch.spurr));
@@ -597,6 +602,12 @@ int main(void)
         DEFINE(VCPU_HOST_SPEFSCR, offsetof(struct kvm_vcpu, arch.host_spefscr));
 #endif
 
+#ifdef CONFIG_KVM_BOOKE_HV
+        DEFINE(VCPU_HOST_MAS4, offsetof(struct kvm_vcpu, arch.host_mas4));
+        DEFINE(VCPU_HOST_MAS6, offsetof(struct kvm_vcpu, arch.host_mas6));
+        DEFINE(VCPU_EPLC, offsetof(struct kvm_vcpu, arch.eplc));
+#endif
+
 #ifdef CONFIG_KVM_EXIT_TIMING
         DEFINE(VCPU_TIMING_EXIT_TBU, offsetof(struct kvm_vcpu,
                                                 arch.timing_exit.tv32.tbu));