KVM: PPC: Book3S PR: Handle Facility interrupt and FSCR

POWER8 introduced a new interrupt type called "Facility unavailable interrupt"
which contains its status message in a new register called FSCR.

Handle these exits and try to emulate instructions for unhandled facilities.
Follow-on patches enable KVM to expose specific facilities into the guest.

Signed-off-by: Alexander Graf <agraf@suse.de>

3 files changed, 13 insertions, 8 deletions

diff --git a/arch/powerpc/include/asm/kvm_asm.h b/arch/powerpc/include/asm/kvm_asm.h
index 19eb74a95b59..9601741080e5 100644
--- a/arch/powerpc/include/asm/kvm_asm.h
+++ b/arch/powerpc/include/asm/kvm_asm.h
@@ -102,6 +102,7 @@
 #define BOOK3S_INTERRUPT_PERFMON        0xf00
 #define BOOK3S_INTERRUPT_ALTIVEC        0xf20
 #define BOOK3S_INTERRUPT_VSX            0xf40
+#define BOOK3S_INTERRUPT_FAC_UNAVAIL    0xf60
 #define BOOK3S_INTERRUPT_H_FAC_UNAVAIL  0xf80
 
 #define BOOK3S_IRQPRIO_SYSTEM_RESET             0
@@ -114,14 +115,15 @@
 #define BOOK3S_IRQPRIO_FP_UNAVAIL               7
 #define BOOK3S_IRQPRIO_ALTIVEC                  8
 #define BOOK3S_IRQPRIO_VSX                      9
-#define BOOK3S_IRQPRIO_SYSCALL                  10
-#define BOOK3S_IRQPRIO_MACHINE_CHECK            11
-#define BOOK3S_IRQPRIO_DEBUG                    12
-#define BOOK3S_IRQPRIO_EXTERNAL                 13
-#define BOOK3S_IRQPRIO_DECREMENTER              14
-#define BOOK3S_IRQPRIO_PERFORMANCE_MONITOR      15
-#define BOOK3S_IRQPRIO_EXTERNAL_LEVEL           16
-#define BOOK3S_IRQPRIO_MAX                      17
+#define BOOK3S_IRQPRIO_FAC_UNAVAIL              10
+#define BOOK3S_IRQPRIO_SYSCALL                  11
+#define BOOK3S_IRQPRIO_MACHINE_CHECK            12
+#define BOOK3S_IRQPRIO_DEBUG                    13
+#define BOOK3S_IRQPRIO_EXTERNAL                 14
+#define BOOK3S_IRQPRIO_DECREMENTER              15
+#define BOOK3S_IRQPRIO_PERFORMANCE_MONITOR      16
+#define BOOK3S_IRQPRIO_EXTERNAL_LEVEL           17
+#define BOOK3S_IRQPRIO_MAX                      18
 
 #define BOOK3S_HFLAG_DCBZ32                     0x1
 #define BOOK3S_HFLAG_SLB                        0x2
diff --git a/arch/powerpc/include/asm/kvm_book3s_asm.h b/arch/powerpc/include/asm/kvm_book3s_asm.h
index 821725c1bf46..5bdfb5dd3400 100644
--- a/arch/powerpc/include/asm/kvm_book3s_asm.h
+++ b/arch/powerpc/include/asm/kvm_book3s_asm.h
@@ -104,6 +104,7 @@ struct kvmppc_host_state {
 #ifdef CONFIG_PPC_BOOK3S_64
         u64 cfar;
         u64 ppr;
+        u64 host_fscr;
 #endif
 };
 
@@ -133,6 +134,7 @@ struct kvmppc_book3s_shadow_vcpu {
                 u64     esid;
                 u64     vsid;
         } slb[64];                      /* guest SLB */
+        u64 shadow_fscr;
 #endif
 };
 
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index 15f19d3cc584..232ec5f0b886 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -475,6 +475,7 @@ struct kvm_vcpu_arch {
         ulong ppr;
         ulong pspb;
         ulong fscr;
+        ulong shadow_fscr;
         ulong ebbhr;
         ulong ebbrr;
         ulong bescr;