Re: [Qemu-devel] [PATCH] target-s390x: Mask the SIGP order_code to 8bit.

[Philipp Kern]

Hi,

On Wed, Aug 26, 2015 at 11:18:42AM +0200, Alexander Graf wrote:
> On 20.08.15 19:16, Thomas Huth wrote:
> > On 18/08/15 04:50, Philipp Kern wrote:
> >> According to "CPU Signaling and Response", "Signal-Processor Orders",
> >> the order field is bit position 56-63. Without this, the Linux
> >> guest kernel is sometimes unable to stop emulation and enters
> >> an infinite loop of "XXX unknown sigp: 0xffffffff00000005".
> >>
> >> Signed-off-by: Philipp Kern <address@hidden>
> >> ---
> >>  target-s390x/misc_helper.c | 2 +-
> >>  1 file changed, 1 insertion(+), 1 deletion(-)
> >>
> >> diff --git a/target-s390x/misc_helper.c b/target-s390x/misc_helper.c
> >> index 8eac0e1..0f0907c 100644
> >> --- a/target-s390x/misc_helper.c
> >> +++ b/target-s390x/misc_helper.c
> >> @@ -500,7 +500,7 @@ uint32_t HELPER(sigp)(CPUS390XState *env, uint64_t 
> >> order_code, uint32_t r1,
> >>      /* Remember: Use "R1 or R1 + 1, whichever is the odd-numbered 
> >> register"
> >>         as parameter (input). Status (output) is always R1. */
> >>  
> >> -    switch (order_code) {
> >> +    switch (order_code & 0xff) {
> >>      case SIGP_SET_ARCH:
> >>          /* switch arch */
> >>          break;
> > 
> > Reviewed-by: Thomas Huth <address@hidden>
> Thanks, applied to s390-next.

it looks like this patch never made it to qemu master. Could someone apply it
please?

(It also seems to be the only pending patch in agraf's s390-next[1].)

Kind regards and thanks
Philipp Kern

[1] https://github.com/agraf/qemu/tree/s390-next

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