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authorEric Auger <eric.auger@redhat.com>2017-04-13 10:06:20 +0300
committerChristoffer Dall <cdall@linaro.org>2017-05-08 15:35:04 +0300
commit71afe470e20db133b30730cfa856e5d6854312e9 (patch)
treeed474996951d6e6be477c076768f32ecf29780ce /include/kvm
parent0979bfa69421279459b4516542503f1d577d2ec5 (diff)
downloadlinux-71afe470e20db133b30730cfa856e5d6854312e9.tar.xz
KVM: arm64: vgic-its: Introduce migration ABI infrastructure
We plan to support different migration ABIs, ie. characterizing the ITS table layout format in guest RAM. For example, a new ABI will be needed if vLPIs get supported for nested use case. So let's introduce an array of supported ABIs (at the moment a single ABI is supported though). The following characteristics are foreseen to vary with the ABI: size of table entries, save/restore operation, the way abi settings are applied. By default the MAX_ABI_REV is applied on its creation. In subsequent patches we will introduce a way for the userspace to change the ABI in use. The entry sizes now are set according to the ABI version and not hardcoded anymore. Signed-off-by: Eric Auger <eric.auger@redhat.com> Reviewed-by: Christoffer Dall <cdall@linaro.org>
Diffstat (limited to 'include/kvm')
-rw-r--r--include/kvm/arm_vgic.h3
1 files changed, 3 insertions, 0 deletions
diff --git a/include/kvm/arm_vgic.h b/include/kvm/arm_vgic.h
index 26ed4fb896bb..fabcc649e2ce 100644
--- a/include/kvm/arm_vgic.h
+++ b/include/kvm/arm_vgic.h
@@ -162,6 +162,9 @@ struct vgic_its {
u32 creadr;
u32 cwriter;
+ /* migration ABI revision in use */
+ u32 abi_rev;
+
/* Protects the device and collection lists */
struct mutex its_lock;
struct list_head device_list;