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authorAlexey Kardashevskiy <aik@ozlabs.ru>2013-09-03 18:08:25 +1000
committerPaolo Bonzini <pbonzini@redhat.com>2013-09-20 12:37:52 +0200
commit76fe21dedafb0319306bc993f23e7646b139cfe4 (patch)
tree7ea4f6972d46939ec16090496ad7b7201f6946dc /include
parent0e5035776df31380a44a1a851850d110b551ecb6 (diff)
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kvm irqfd: support direct msimessage to irq translation
On PPC64 systems MSI Messages are translated to system IRQ in a PCI host bridge. This is already supported for emulated MSI/MSIX but not for irqfd where the current QEMU allocates IRQ numbers from irqchip and maps MSIMessages to IRQ in the host kernel. This adds a new direct mapping flag which tells the kvm_irqchip_add_msi_route() function that a new VIRQ should not be allocated, instead the value from MSIMessage::data should be used. It is up to the platform code to make sure that this contains a valid IRQ number as sPAPR does in spapr_pci.c. Signed-off-by: Alexey Kardashevskiy <aik@ozlabs.ru> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'include')
-rw-r--r--include/sysemu/kvm.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 3b0ef46..73c1ec5 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