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authorAlexander Graf <agraf@suse.de>2011-08-08 16:11:36 +0200
committerAvi Kivity <avi@redhat.com>2011-09-25 19:52:22 +0300
commit77e675ad825d1106f973afd353e8af84cd8d3960 (patch)
tree38aafd0e46d019c32149587f10fcd02e88f93a4c /arch/powerpc/kvm
parent04fcc11bb5653c421f11f109d8b79ea5eb9fedb4 (diff)
downloadlinux-77e675ad825d1106f973afd353e8af84cd8d3960.tar.bz2
KVM: PPC: Read out syscall instruction on trap
We have a few traps where we cache the instruction that cause the trap for analysis later on. Since we now need to be able to distinguish between SC 0 and SC 1 system calls and the only way to find out which is which is by looking at the instruction, we also read out the instruction causing the system call. Signed-off-by: Alexander Graf <agraf@suse.de>
Diffstat (limited to 'arch/powerpc/kvm')
-rw-r--r--arch/powerpc/kvm/book3s_segment.S5
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/powerpc/kvm/book3s_segment.S b/arch/powerpc/kvm/book3s_segment.S
index aed32e517212..678b6be31693 100644
--- a/arch/powerpc/kvm/book3s_segment.S
+++ b/arch/powerpc/kvm/book3s_segment.S
@@ -213,11 +213,16 @@ END_FTR_SECTION_IFSET(CPU_FTR_HVMODE)
beq ld_last_inst
cmpwi r12, BOOK3S_INTERRUPT_PROGRAM
beq ld_last_inst
+ cmpwi r12, BOOK3S_INTERRUPT_SYSCALL
+ beq ld_last_prev_inst
cmpwi r12, BOOK3S_INTERRUPT_ALIGNMENT
beq- ld_last_inst
b no_ld_last_inst
+ld_last_prev_inst:
+ addi r3, r3, -4
+
ld_last_inst:
/* Save off the guest instruction we're at */