Messages in this thread Patch in this message | | | From | Avi Kivity <> | Subject | [PATCH 21/31] KVM: ppc: Add DCR access information to struct kvm_run | Date | Mon, 21 Apr 2008 13:29:47 +0300 |
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From: Hollis Blanchard <hollisb@us.ibm.com>
Device Control Registers are essentially another address space found on PowerPC 4xx processors, analogous to PIO on x86. DCRs are always 32 bits, and can be identified by a 32-bit number. We forward most DCR accesses to userspace for emulation (with the exception of CPR0 registers, which can be read directly for simplicity in timebase frequency determination).
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com> --- include/linux/kvm.h | 7 +++++++ 1 files changed, 7 insertions(+), 0 deletions(-)
diff --git a/include/linux/kvm.h b/include/linux/kvm.h index f8e211d..a281afe 100644 --- a/include/linux/kvm.h +++ b/include/linux/kvm.h @@ -82,6 +82,7 @@ struct kvm_irqchip { #define KVM_EXIT_TPR_ACCESS 12 #define KVM_EXIT_S390_SIEIC 13 #define KVM_EXIT_S390_RESET 14 +#define KVM_EXIT_DCR 15 /* for KVM_RUN, returned by mmap(vcpu_fd, offset=0) */ struct kvm_run { @@ -161,6 +162,12 @@ struct kvm_run { #define KVM_S390_RESET_CPU_INIT 8 #define KVM_S390_RESET_IPL 16 __u64 s390_reset_flags; + /* KVM_EXIT_DCR */ + struct { + __u32 dcrn; + __u32 data; + __u8 is_write; + } dcr; /* Fix the size of the union. */ char padding[256]; }; -- 1.5.5
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