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authorHollis Blanchard <hollisb@us.ibm.com>2008-04-16 23:28:07 -0500
committerAvi Kivity <avi@qumranet.com>2008-04-27 18:21:37 +0300
commitb2312f059c893833de58876c74290511846cd208 (patch)
tree6164572aeaf0761412af0ce860b031e126cebcba
parent4baacfb0de53b05428c87d377fc8a3def4dc10e7 (diff)
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 <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
-rw-r--r--include/linux/kvm.h7
1 files changed, 7 insertions, 0 deletions
diff --git a/include/linux/kvm.h b/include/linux/kvm.h
index f8e211d8ce8..a281afeddfb 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];
};