Techwizz/kernel-fxtec-pro1x
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity

KVM: ppc: Add DCR access information to struct kvm_run

Browse source 
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>
This commit is contained in:
Hollis Blanchard 2008-04-16 23:28:07 -05:00 committed by Avi Kivity
parent 4baacfb0de
commit b2312f059c
1 changed files with 7 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

7
include/linux/kvm.h
View file

@ -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];
};