KVM: Add coalesced MMIO support (ia64 part)

This patch enables coalesced MMIO for ia64 architecture.
It defines KVM_MMIO_PAGE_OFFSET and KVM_CAP_COALESCED_MMIO.
It enables the compilation of coalesced_mmio.c.

[akpm: fix compile error on ia64]

Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Avi Kivity <avi@qumranet.com>

3 files changed, 6 insertions, 1 deletions

diff --git a/arch/ia64/kvm/Makefile b/arch/ia64/kvm/Makefile
index 112791dd2542..bf22fb9e6dcf 100644
--- a/arch/ia64/kvm/Makefile
+++ b/arch/ia64/kvm/Makefile
@@ -43,7 +43,8 @@ $(obj)/$(offsets-file): arch/ia64/kvm/asm-offsets.s
 EXTRA_CFLAGS += -Ivirt/kvm -Iarch/ia64/kvm/
 EXTRA_AFLAGS += -Ivirt/kvm -Iarch/ia64/kvm/
 
-common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o)
+common-objs = $(addprefix ../../../virt/kvm/, kvm_main.o ioapic.o \
+                coalesced_mmio.o)
 
 kvm-objs := $(common-objs) kvm-ia64.o kvm_fw.o
 obj-$(CONFIG_KVM) += kvm.o
diff --git a/arch/ia64/kvm/kvm-ia64.c b/arch/ia64/kvm/kvm-ia64.c
index bb58df7cc418..9408b30576d6 100644
--- a/arch/ia64/kvm/kvm-ia64.c
+++ b/arch/ia64/kvm/kvm-ia64.c
@@ -187,6 +187,9 @@ int kvm_dev_ioctl_check_extension(long ext)
 
                 r = 1;
                 break;
+        case KVM_CAP_COALESCED_MMIO:
+                r = KVM_COALESCED_MMIO_PAGE_OFFSET;
+                break;
         default:
                 r = 0;
         }
diff --git a/include/asm-ia64/kvm_host.h b/include/asm-ia64/kvm_host.h
index 5c958b0c46b1..1efe513a9941 100644
--- a/include/asm-ia64/kvm_host.h
+++ b/include/asm-ia64/kvm_host.h
@@ -38,6 +38,7 @@
 /* memory slots that does not exposed to userspace */
 #define KVM_PRIVATE_MEM_SLOTS 4
 
+#define KVM_COALESCED_MMIO_PAGE_OFFSET 1
 
 /* define exit reasons from vmm to kvm*/
 #define EXIT_REASON_VM_PANIC            0