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s390/kvm: basic implementation of diagnose 308 subcode 6

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Linux uses a check for subcode 6 to decide if other subcodes are
available. Provide a minimal implementation for subcode 6, as well
as for subcode 5.

Signed-off-by: Eugene (jno) Dvurechenski <jno@linux.vnet.ibm.com>
Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
[Move code from kvm.c into misc_helper.c]
This commit is contained in:
Eugene (jno) Dvurechenski 2013-06-19 17:27:15 +02:00 • committed by Christian Borntraeger
parent 39fbc5c62c
commit 268846ba93
3 changed files with 57 additions and 0 deletions
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14
target-s390x/kvm.c
View file

@ -72,6 +72,7 @@
#define PRIV_XSCH 0x76
#define PRIV_SQBS 0x8a
#define PRIV_EQBS 0x9c
#define DIAG_IPL 0x308
#define DIAG_KVM_HYPERCALL 0x500
#define DIAG_KVM_BREAKPOINT 0x501
@ -578,11 +579,24 @@ static int handle_hypercall(S390CPU *cpu, struct kvm_run *run)
return 0;
}
static void kvm_handle_diag_308(S390CPU *cpu, struct kvm_run *run)
{
uint64_t r1, r3;
cpu_synchronize_state(CPU(cpu));
r1 = (run->s390_sieic.ipa & 0x00f0) >> 8;
r3 = run->s390_sieic.ipa & 0x000f;
handle_diag_308(&cpu->env, r1, r3);
}
static int handle_diag(S390CPU *cpu, struct kvm_run *run, int ipb_code)
{
int r = 0;
switch (ipb_code) {
case DIAG_IPL:
kvm_handle_diag_308(cpu, run);
break;
case DIAG_KVM_HYPERCALL:
r = handle_hypercall(cpu, run);
break;