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authorAvi Kivity <avi@redhat.com>2010-01-20 13:01:20 +0300
committerAvi Kivity <avi@redhat.com>2011-05-11 15:56:58 +0400
commitcef4dea07f6720b36cc93e18a2e68be4bdb71a92 (patch)
treef6c67df1a54a2770d23086446807ca62f964c2e1 /include/linux/kvm_host.h
parent5287f194bf0d7062d6d99b725366202556f03e28 (diff)
downloadlinux-cef4dea07f6720b36cc93e18a2e68be4bdb71a92.tar.xz
KVM: 16-byte mmio support
Since sse instructions can issue 16-byte mmios, we need to support them. We can't increase the kvm_run mmio buffer size to 16 bytes without breaking compatibility, so instead we break the large mmios into two smaller 8-byte ones. Since the bus is 64-bit we aren't breaking any atomicity guarantees. Signed-off-by: Avi Kivity <avi@redhat.com>
Diffstat (limited to 'include/linux/kvm_host.h')
-rw-r--r--include/linux/kvm_host.h7
1 files changed, 6 insertions, 1 deletions
diff --git a/include/linux/kvm_host.h b/include/linux/kvm_host.h
index 7ca831e55186..d1f507567068 100644
--- a/include/linux/kvm_host.h
+++ b/include/linux/kvm_host.h
@@ -27,6 +27,10 @@
#include <asm/kvm_host.h>
+#ifndef KVM_MMIO_SIZE
+#define KVM_MMIO_SIZE 8
+#endif
+
/*
* vcpu->requests bit members
*/
@@ -132,7 +136,8 @@ struct kvm_vcpu {
int mmio_read_completed;
int mmio_is_write;
int mmio_size;
- unsigned char mmio_data[8];
+ int mmio_index;
+ unsigned char mmio_data[KVM_MMIO_SIZE];
gpa_t mmio_phys_addr;
#endif