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-rw-r--r--include/sysemu/kvm.h9
-rw-r--r--kvm-all.c13
-rw-r--r--kvm-stub.c1
3 files changed, 23 insertions, 0 deletions
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 3b0ef46509..73c1ec5c40 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -46,6 +46,7 @@ extern bool kvm_halt_in_kernel_allowed;
extern bool kvm_irqfds_allowed;
extern bool kvm_msi_via_irqfd_allowed;
extern bool kvm_gsi_routing_allowed;
+extern bool kvm_gsi_direct_mapping;
extern bool kvm_readonly_mem_allowed;
#if defined CONFIG_KVM || !defined NEED_CPU_H
@@ -108,6 +109,13 @@ extern bool kvm_readonly_mem_allowed;
#define kvm_gsi_routing_enabled() (kvm_gsi_routing_allowed)
/**
+ * kvm_gsi_direct_mapping:
+ *
+ * Returns: true if GSI direct mapping is enabled.
+ */
+#define kvm_gsi_direct_mapping() (kvm_gsi_direct_mapping)
+
+/**
* kvm_readonly_mem_enabled:
*
* Returns: true if KVM readonly memory is enabled (ie the kernel
@@ -123,6 +131,7 @@ extern bool kvm_readonly_mem_allowed;
#define kvm_irqfds_enabled() (false)
#define kvm_msi_via_irqfd_enabled() (false)
#define kvm_gsi_routing_allowed() (false)
+#define kvm_gsi_direct_mapping() (false)
#define kvm_readonly_mem_enabled() (false)
#endif
diff --git a/kvm-all.c b/kvm-all.c
index d55c21ffc2..7630a7d6e3 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -111,6 +111,7 @@ bool kvm_halt_in_kernel_allowed;
bool kvm_irqfds_allowed;
bool kvm_msi_via_irqfd_allowed;
bool kvm_gsi_routing_allowed;
+bool kvm_gsi_direct_mapping;
bool kvm_allowed;
bool kvm_readonly_mem_allowed;
@@ -1069,6 +1070,10 @@ void kvm_irqchip_release_virq(KVMState *s, int virq)
struct kvm_irq_routing_entry *e;
int i;
+ if (kvm_gsi_direct_mapping()) {
+ return;
+ }
+
for (i = 0; i < s->irq_routes->nr; i++) {
e = &s->irq_routes->entries[i];
if (e->gsi == virq) {
@@ -1190,6 +1195,10 @@ int kvm_irqchip_add_msi_route(KVMState *s, MSIMessage msg)
struct kvm_irq_routing_entry kroute = {};
int virq;
+ if (kvm_gsi_direct_mapping()) {
+ return msg.data & 0xffff;
+ }
+
if (!kvm_gsi_routing_enabled()) {
return -ENOSYS;
}
@@ -1216,6 +1225,10 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
{
struct kvm_irq_routing_entry kroute = {};
+ if (kvm_gsi_direct_mapping()) {
+ return 0;
+ }
+
if (!kvm_irqchip_in_kernel()) {
return -ENOSYS;
}
diff --git a/kvm-stub.c b/kvm-stub.c
index 548f471c17..e979f76d07 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -25,6 +25,7 @@ bool kvm_async_interrupts_allowed;
bool kvm_irqfds_allowed;
bool kvm_msi_via_irqfd_allowed;
bool kvm_gsi_routing_allowed;
+bool kvm_gsi_direct_mapping;
bool kvm_allowed;
bool kvm_readonly_mem_allowed;