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| author |   Christian Borntraeger <borntraeger@de.ibm.com> | 2018-01-17 14:44:34 +0100 |
|---|---|---|
| committer |   Radim Krčmář <rkrcmar@redhat.com> | 2018-01-20 17:30:47 +0100 |
| commit | 35b3fde6203b932b2b1a5b53b3d8808abc9c4f60 (patch) | |
| tree | 872a70372b05ddf324c5cc943efedf0ddd722b96 /arch/s390/include/uapi/asm | |
| parent | Merge tag 'kvm-ppc-cve-4.15-2' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc (diff) | |
| download | linux-dev-35b3fde6203b932b2b1a5b53b3d8808abc9c4f60.tar.xz linux-dev-35b3fde6203b932b2b1a5b53b3d8808abc9c4f60.zip | |
KVM: s390: wire up bpb feature
The new firmware interfaces for branch prediction behaviour changes
are transparently available for the guest. Nevertheless, there is
new state attached that should be migrated and properly resetted.
Provide a mechanism for handling reset, migration and VSIE.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
[Changed capability number to 152. - Radim]
Signed-off-by: Radim Krčmář <rkrcmar@redhat.com>
Diffstat (limited to 'arch/s390/include/uapi/asm')
| -rw-r--r-- | arch/s390/include/uapi/asm/kvm.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/arch/s390/include/uapi/asm/kvm.h b/arch/s390/include/uapi/asm/kvm.h index 38535a57fef8..4cdaa55fabfe 100644 --- a/arch/s390/include/uapi/asm/kvm.h +++ b/arch/s390/include/uapi/asm/kvm.h @@ -224,6 +224,7 @@ struct kvm_guest_debug_arch { #define KVM_SYNC_RICCB (1UL << 7) #define KVM_SYNC_FPRS (1UL << 8) #define KVM_SYNC_GSCB (1UL << 9) +#define KVM_SYNC_BPBC (1UL << 10) /* length and alignment of the sdnx as a power of two */ #define SDNXC 8 #define SDNXL (1UL << SDNXC) @@ -247,7 +248,9 @@ struct kvm_sync_regs { }; __u8 reserved[512]; /* for future vector expansion */ __u32 fpc; /* valid on KVM_SYNC_VRS or KVM_SYNC_FPRS */ - __u8 padding1[52]; /* riccb needs to be 64byte aligned */ + __u8 bpbc : 1; /* bp mode */ + __u8 reserved2 : 7; + __u8 padding1[51]; /* riccb needs to be 64byte aligned */ __u8 riccb[64]; /* runtime instrumentation controls block */ __u8 padding2[192]; /* sdnx needs to be 256byte aligned */ union { |