KVM: PPC: Introduce shared page
For transparent variable sharing between the hypervisor and guest, I introduce
a shared page. This shared page will contain all the registers the guest can
read and write safely without exiting guest context.
This patch only implements the stubs required for the basic structure of the
shared page. The actual register moving follows.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/powerpc/include/asm/kvm_host.h b/arch/powerpc/include/asm/kvm_host.h
index b0b23c0..53edacd 100644
--- a/arch/powerpc/include/asm/kvm_host.h
+++ b/arch/powerpc/include/asm/kvm_host.h
@@ -25,6 +25,7 @@
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/kvm_types.h>
+#include <linux/kvm_para.h>
#include <asm/kvm_asm.h>
#define KVM_MAX_VCPUS 1
@@ -290,6 +291,7 @@
struct tasklet_struct tasklet;
u64 dec_jiffies;
unsigned long pending_exceptions;
+ struct kvm_vcpu_arch_shared *shared;
#ifdef CONFIG_PPC_BOOK3S
struct hlist_head hpte_hash_pte[HPTEG_HASH_NUM_PTE];