Handle KVM_EXIT_ESN exit by issuing subvention notification
interrupt to the guest. Guests supporting async-pf feature
will need this interrupt to wake up tasks that are waiting
for the expropriated pages to be available.
Note: Updates to linux-headers/linux/kvm.h are temporary
pending headers update.
Signed-off-by: Bharata B Rao <bhar...@linux.ibm.com>
---
linux-headers/linux/kvm.h | 1 +
target/ppc/kvm.c | 16 ++++++++++++++++
2 files changed, 17 insertions(+)
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index a76945fcbc..105c8b069a 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -269,6 +269,7 @@ struct kvm_xen_exit {
#define KVM_EXIT_AP_RESET_HOLD 32
#define KVM_EXIT_X86_BUS_LOCK 33
#define KVM_EXIT_XEN 34
+#define KVM_EXIT_ESN 35
/* For KVM_EXIT_INTERNAL_ERROR */
/* Emulate instruction failed. */
diff --git a/target/ppc/kvm.c b/target/ppc/kvm.c
index 330985c8a0..6bf3f06b88 100644
--- a/target/ppc/kvm.c
+++ b/target/ppc/kvm.c
@@ -38,6 +38,7 @@
#include "hw/ppc/spapr_cpu_core.h"
#include "hw/hw.h"
#include "hw/ppc/ppc.h"
+#include "hw/irq.h"
#include "migration/qemu-file-types.h"
#include "sysemu/watchdog.h"
#include "trace.h"
@@ -1657,6 +1658,16 @@ static int kvm_handle_debug(PowerPCCPU *cpu, struct
kvm_run *run)
return DEBUG_RETURN_GUEST;
}
+#if defined(TARGET_PPC64)
+static void kvmppc_handle_esn(PowerPCCPU *cpu)
+{
+ SpaprMachineState *spapr = SPAPR_MACHINE(qdev_get_machine());
+
+ fprintf(stderr, "%s: ESN exit\n", __func__);
+ qemu_irq_pulse(spapr_qirq(spapr, SPAPR_IRQ_SNS));
+}
+#endif
+
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
{
PowerPCCPU *cpu = POWERPC_CPU(cs);
@@ -1687,6 +1698,11 @@ int kvm_arch_handle_exit(CPUState *cs, struct kvm_run
*run)
run->papr_hcall.args);
ret = 0;
break;
+
+ case KVM_EXIT_ESN:
+ kvmppc_handle_esn(cpu);
+ ret = 0;
+ break;
#endif
case KVM_EXIT_EPR:
trace_kvm_handle_epr();
--
2.31.1
