[Qemu-devel] [RFC v5 4/7] target-arm/kvm: Pass requester ID to MSI routing functions

[Eric Auger <eric.auger@redhat.com>]

From: Pavel Fedin <p.fedin@samsung.com>

Introduce global kvm_arm_msi_use_devid flag and pass device IDs in
kvm_arch_fixup_msi_route(). Device IDs are required by the ITS.

Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
Signed-off-by: Eric Auger <eric.auger@redhat.com>

---

v3 -> v4:
- OR route->flags with KVM_MSI_VALID_DEVID
---
 target-arm/kvm.c     | 6 ++++++
 target-arm/kvm_arm.h | 3 +++
 2 files changed, 9 insertions(+)

diff --git a/target-arm/kvm.c b/target-arm/kvm.c
index dbe393c..4675aa3 100644
--- a/target-arm/kvm.c
+++ b/target-arm/kvm.c
@@ -22,6 +22,7 @@
 #include "cpu.h"
 #include "internals.h"
 #include "hw/arm/arm.h"
+#include "hw/pci/pci.h"
 #include "exec/memattrs.h"
 #include "hw/boards.h"
 #include "qemu/log.h"
@@ -31,6 +32,7 @@ const KVMCapabilityInfo kvm_arch_required_capabilities[] = {
 };
 
 static bool cap_has_mp_state;
+bool kvm_arm_msi_use_devid;
 
 int kvm_arm_vcpu_init(CPUState *cs)
 {
@@ -619,6 +621,10 @@ int kvm_arm_vgic_probe(void)
 int kvm_arch_fixup_msi_route(struct kvm_irq_routing_entry *route,
                              uint64_t address, uint32_t data, PCIDevice *dev)
 {
+    if (kvm_arm_msi_use_devid) {
+        route->flags |= KVM_MSI_VALID_DEVID;
+        route->u.msi.devid = pci_requester_id(dev);
+    }
     return 0;
 }
 
diff --git a/target-arm/kvm_arm.h b/target-arm/kvm_arm.h
index 633d088..befcfd1 100644
--- a/target-arm/kvm_arm.h
+++ b/target-arm/kvm_arm.h
@@ -121,6 +121,9 @@ bool write_kvmstate_to_list(ARMCPU *cpu);
 void kvm_arm_reset_vcpu(ARMCPU *cpu);
 
 #ifdef CONFIG_KVM
+
+extern bool kvm_arm_msi_use_devid;
+
 /**
  * kvm_arm_create_scratch_host_vcpu:
  * @cpus_to_try: array of QEMU_KVM_ARM_TARGET_* values (terminated with
-- 
2.5.5