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KVM: PPC: Book3S HV: Use XICS hypercalls when running as a nested hypervisor

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This adds code to call the H_IPI and H_EOI hypercalls when we are
running as a nested hypervisor (i.e. without the CPU_FTR_HVMODE cpu
feature) and we would otherwise access the XICS interrupt controller
directly or via an OPAL call.

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@ozlabs.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
This commit is contained in:
Paul Mackerras
2018-10-08 16:31:05 +11:00
committed by Michael Ellerman
parent 360cae3137
commit f3c18e9342
3 changed files with 50 additions and 9 deletions
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7
arch/powerpc/kvm/book3s_hv.c
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@@ -173,6 +173,10 @@ static bool kvmppc_ipi_thread(int cpu)
{
unsigned long msg = PPC_DBELL_TYPE(PPC_DBELL_SERVER);
/* If we're a nested hypervisor, fall back to ordinary IPIs for now */
if (kvmhv_on_pseries())
return false;
/* On POWER9 we can use msgsnd to IPI any cpu */
if (cpu_has_feature(CPU_FTR_ARCH_300)) {
msg |= get_hard_smp_processor_id(cpu);
@@ -5177,7 +5181,8 @@ static int kvmppc_book3s_init_hv(void)
* indirectly, via OPAL.
*/
#ifdef CONFIG_SMP
if (!xive_enabled() && !local_paca->kvm_hstate.xics_phys) {
if (!xive_enabled() && !kvmhv_on_pseries() &&
!local_paca->kvm_hstate.xics_phys) {
struct device_node *np;
np = of_find_compatible_node(NULL, NULL, "ibm,opal-intc");