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xics: Implement H_IPOLL 

This adds support for the H_IPOLL hypercall which the guest
uses to poll for a pending interrupt. This hypercall is
mandatory for PAPR+ and there is no way for the guest to
detect whether it is supported or not so just add it.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Acked-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Benjamin Herrenschmidt 2013-09-26 16:18:45 +10:00 committed by Alexander Graf
parent 11ad93f681
commit 075edbe3ba
1 changed files with 13 additions and 0 deletions
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13
hw/intc/xics.c
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@ -689,6 +689,18 @@ static target_ulong h_eoi(PowerPCCPU *cpu, sPAPREnvironment *spapr,
return H_SUCCESS; return H_SUCCESS;
} }
static target_ulong h_ipoll(PowerPCCPU *cpu, sPAPREnvironment *spapr,
target_ulong opcode, target_ulong *args)
{
CPUState *cs = CPU(cpu);
ICPState *ss = &spapr->icp->ss[cs->cpu_index];
args[0] = ss->xirr;
args[1] = ss->mfrr;
return H_SUCCESS;
}
static void rtas_set_xive(PowerPCCPU *cpu, sPAPREnvironment *spapr, static void rtas_set_xive(PowerPCCPU *cpu, sPAPREnvironment *spapr,
uint32_t token, uint32_t token,
uint32_t nargs, target_ulong args, uint32_t nargs, target_ulong args,
@ -842,6 +854,7 @@ static void xics_realize(DeviceState *dev, Error **errp)
spapr_register_hypercall(H_IPI, h_ipi); spapr_register_hypercall(H_IPI, h_ipi);
spapr_register_hypercall(H_XIRR, h_xirr); spapr_register_hypercall(H_XIRR, h_xirr);
spapr_register_hypercall(H_EOI, h_eoi); spapr_register_hypercall(H_EOI, h_eoi);
spapr_register_hypercall(H_IPOLL, h_ipoll);
object_property_set_bool(OBJECT(icp->ics), true, "realized", &error); object_property_set_bool(OBJECT(icp->ics), true, "realized", &error);
if (error) { if (error) {