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| author | Alexander Graf <agraf@suse.de> | 2011-08-08 16:11:36 +0200 |
|---|---|---|
| committer | Avi Kivity <avi@redhat.com> | 2011-09-25 19:52:22 +0300 |
| commit | 77e675ad825d1106f973afd353e8af84cd8d3960 (patch) | |
| tree | 38aafd0e46d019c32149587f10fcd02e88f93a4c | |
| parent | 04fcc11bb5653c421f11f109d8b79ea5eb9fedb4 (diff) | |
| download | lwn-77e675ad825d1106f973afd353e8af84cd8d3960.tar.gz lwn-77e675ad825d1106f973afd353e8af84cd8d3960.zip | |
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>
| -rw-r--r-- | arch/powerpc/kvm/book3s_segment.S | 5 |
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 */ |