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s390x/kvm: Simplified the calculation of the SIGP order code 

We've already got a helper function for calculating the
base/displacement of RS formatted instructions, so we can
get rid of the manual calculation of the SIGP order code.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Jens Freimann <jfrei@linux.vnet.ibm.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Thomas Huth 2013-12-17 14:22:08 +01:00 committed by Alexander Graf
parent b20a461fcd
commit b8031adba7
1 changed files with 3 additions and 5 deletions
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8
target-s390x/kvm.c
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@ -626,6 +626,8 @@ static int s390_cpu_initial_reset(S390CPU *cpu)
return 0;
}
#define SIGP_ORDER_MASK 0x000000ff
static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
{
CPUS390XState *env = &cpu->env;
@ -637,11 +639,7 @@ static int handle_sigp(S390CPU *cpu, struct kvm_run *run, uint8_t ipa1)
cpu_synchronize_state(CPU(cpu));
/* get order code */
order_code = run->s390_sieic.ipb >> 28;
if (order_code > 0) {
order_code = env->regs[order_code];
}
order_code += (run->s390_sieic.ipb & 0x0fff0000) >> 16;
order_code = decode_basedisp_rs(env, run->s390_sieic.ipb) & SIGP_ORDER_MASK;
cpu_addr = env->regs[ipa1 & 0x0f];
target_cpu = s390_cpu_addr2state(cpu_addr);