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[Qemu-devel] [PATCH v2 1/2] kvm-all.c: add qemu_irq/gsi hash table and u
From: |
Eric Auger |
Subject: |
[Qemu-devel] [PATCH v2 1/2] kvm-all.c: add qemu_irq/gsi hash table and utility routines |
Date: |
Thu, 23 Apr 2015 16:08:35 +0100 |
VFIO platform device needs to setup irqfd but it does not know the
gsi corresponding to the device qemu_irq. This series proposes to
store a hash table in kvm_state using the qemu_irq as key and the gsi
as a value.
kvm_irqchip_set_qemuirq_gsi allows to insert such a pair. The interrupt
controller is supposed to use it.
kvm_irqchip_[add, remove]_qemuirq_irqfd_notifier allows to setup/tear down
irqfd directly from the qemu_irq.
Signed-off-by: Eric Auger <address@hidden>
---
include/sysemu/kvm.h | 6 ++++++
kvm-all.c | 35 +++++++++++++++++++++++++++++++++++
2 files changed, 41 insertions(+)
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 197e6c0..911aaa8 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -18,6 +18,7 @@
#include "config-host.h"
#include "qemu/queue.h"
#include "qom/cpu.h"
+#include "hw/irq.h"
#ifdef CONFIG_KVM
#include <linux/kvm.h>
@@ -416,6 +417,11 @@ int kvm_irqchip_add_adapter_route(KVMState *s, AdapterInfo
*adapter);
int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,
EventNotifier *rn, int virq);
int kvm_irqchip_remove_irqfd_notifier(KVMState *s, EventNotifier *n, int virq);
+int kvm_irqchip_add_qemuirq_irqfd_notifier(KVMState *s, EventNotifier *n,
+ EventNotifier *rn, qemu_irq irq);
+int kvm_irqchip_remove_qemuirq_irqfd_notifier(KVMState *s, EventNotifier *n,
+ qemu_irq irq);
+void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi);
void kvm_pc_gsi_handler(void *opaque, int n, int level);
void kvm_pc_setup_irq_routing(bool pci_enabled);
void kvm_init_irq_routing(KVMState *s);
diff --git a/kvm-all.c b/kvm-all.c
index dd44f8c..ec9f4ac 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -37,6 +37,7 @@
#include "exec/address-spaces.h"
#include "qemu/event_notifier.h"
#include "trace.h"
+#include "hw/irq.h"
#include "hw/boards.h"
@@ -99,6 +100,7 @@ struct KVMState
* unsigned, and treating them as signed here can break things */
unsigned irq_set_ioctl;
unsigned int sigmask_len;
+ GHashTable *gsimap;
#ifdef KVM_CAP_IRQ_ROUTING
struct kvm_irq_routing *irq_routes;
int nr_allocated_irq_routes;
@@ -1381,6 +1383,37 @@ int kvm_irqchip_remove_irqfd_notifier(KVMState *s,
EventNotifier *n, int virq)
false);
}
+int kvm_irqchip_add_qemuirq_irqfd_notifier(KVMState *s, EventNotifier *n,
+ EventNotifier *rn, qemu_irq irq)
+{
+ gpointer key, gsi;
+ gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
+
+ if (!found) {
+ return -ENXIO;
+ } else {
+ return kvm_irqchip_add_irqfd_notifier(s, n, rn, GPOINTER_TO_UINT(gsi));
+ }
+}
+
+int kvm_irqchip_remove_qemuirq_irqfd_notifier(KVMState *s, EventNotifier *n,
+ qemu_irq irq)
+{
+ gpointer key, gsi;
+ gboolean found = g_hash_table_lookup_extended(s->gsimap, irq, &key, &gsi);
+
+ if (!found) {
+ return -ENXIO;
+ } else {
+ return kvm_irqchip_remove_irqfd_notifier(s, n, GPOINTER_TO_INT(gsi));
+ }
+}
+
+void kvm_irqchip_set_qemuirq_gsi(KVMState *s, qemu_irq irq, int gsi)
+{
+ g_hash_table_insert(s->gsimap, irq, GINT_TO_POINTER(gsi));
+}
+
static int kvm_irqchip_create(MachineState *machine, KVMState *s)
{
int ret;
@@ -1413,6 +1446,8 @@ static int kvm_irqchip_create(MachineState *machine,
KVMState *s)
kvm_init_irq_routing(s);
+ s->gsimap = g_hash_table_new(g_direct_hash, g_direct_equal);
+
return 0;
}
--
1.8.3.2