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| author | Avi Kivity <avi@redhat.com> | 2010-01-20 12:01:20 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-05-11 07:56:58 -0400 |
| commit | cef4dea07f6720b36cc93e18a2e68be4bdb71a92 (patch) | |
| tree | f6c67df1a54a2770d23086446807ca62f964c2e1 /include/linux/kvm_host.h | |
| parent | 5287f194bf0d7062d6d99b725366202556f03e28 (diff) | |
| download | lwn-cef4dea07f6720b36cc93e18a2e68be4bdb71a92.tar.gz lwn-cef4dea07f6720b36cc93e18a2e68be4bdb71a92.zip | |
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.h | 7 |
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 |