KVM: PPC: Paravirtualize SPRG4-7, ESR, PIR, MASn

This allows additional registers to be accessed by the guest
in PR-mode KVM without trapping.

SPRG4-7 are readable from userspace.  On booke, KVM will sync
these registers when it enters the guest, so that accesses from
guest userspace will work.  The guest kernel, OTOH, must consistently
use either the real registers or the shared area between exits.  This
also applies to the already-paravirted SPRG3.

On non-booke, it's not clear to what extent SPRG4-7 are supported
(they're not architected for book3s, but exist on at least some classic
chips).  They are copied in the get/set regs ioctls, but I do not see any
non-booke emulation.  I also do not see any syncing with real registers
(in PR-mode) including the user-readable SPRG3.  This patch should not
make that situation any worse.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 0 insertions, 6 deletions

diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index bf8af5d..bfd0c99 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -318,10 +318,6 @@ struct kvm_vcpu_arch {
 	u32 vrsave; /* also USPRG0 */
 	u32 mmucr;
 	ulong shadow_msr;
-	ulong sprg4;
-	ulong sprg5;
-	ulong sprg6;
-	ulong sprg7;
 	ulong csrr0;
 	ulong csrr1;
 	ulong dsrr0;
@@ -329,7 +325,6 @@ struct kvm_vcpu_arch {
 	ulong mcsrr0;
 	ulong mcsrr1;
 	ulong mcsr;
-	ulong esr;
 	u32 dec;
 	u32 decar;
 	u32 tbl;
@@ -338,7 +333,6 @@ struct kvm_vcpu_arch {
 	u32 tsr;
 	u32 ivor[64];
 	ulong ivpr;
-	u32 pir;
 	u32 pvr;
 
 	u32 shadow_pid;