From b2312f059c893833de58876c74290511846cd208 Mon Sep 17 00:00:00 2001 From: Hollis Blanchard Date: Wed, 16 Apr 2008 23:28:07 -0500 Subject: [PATCH] KVM: ppc: Add DCR access information to struct kvm_run 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 Signed-off-by: Avi Kivity --- include/linux/kvm.h | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/include/linux/kvm.h b/include/linux/kvm.h index f8e211d8ce..a281afeddf 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]; }; -- 2.39.5