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[Qemu-arm] [PATCH v7 4/8] kvm-all: Pass requester ID to MSI routing func
From: |
Eric Auger |
Subject: |
[Qemu-arm] [PATCH v7 4/8] kvm-all: Pass requester ID to MSI routing functions |
Date: |
Fri, 23 Sep 2016 09:43:33 +0200 |
From: Pavel Fedin <address@hidden>
Introduce global kvm_msi_use_devid flag plus associated
kvm_msi_devid_required() macro. Passes the device ID,
if needed, while building the MSI route entry. Device IDs are
required by the ARM GICv3 ITS (IRQ remapping function is based on
this information).
Signed-off-by: Pavel Fedin <address@hidden>
Signed-off-by: Eric Auger <address@hidden>
---
v6 -> v7:
- add/use kvm_msi_devid_required() macro
v5 -> v6:
- move the flag in include/sysemu/kvm.h and populate the devid
information in kvm-all.c
v3 -> v4:
- OR route->flags with KVM_MSI_VALID_DEVID
---
include/sysemu/kvm.h | 9 +++++++++
kvm-all.c | 9 +++++++++
kvm-stub.c | 1 +
3 files changed, 19 insertions(+)
diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
index 3e17ba7..df67cc0 100644
--- a/include/sysemu/kvm.h
+++ b/include/sysemu/kvm.h
@@ -53,6 +53,7 @@ extern bool kvm_gsi_direct_mapping;
extern bool kvm_readonly_mem_allowed;
extern bool kvm_direct_msi_allowed;
extern bool kvm_ioeventfd_any_length_allowed;
+extern bool kvm_msi_use_devid;
#if defined CONFIG_KVM || !defined NEED_CPU_H
#define kvm_enabled() (kvm_allowed)
@@ -169,6 +170,13 @@ extern bool kvm_ioeventfd_any_length_allowed;
*/
#define kvm_ioeventfd_any_length_enabled() (kvm_ioeventfd_any_length_allowed)
+/**
+ * kvm_msi_devid_required:
+ * Returns: true if KVM requires a device id to be provided while
+ * defining an MSI routing entry.
+ */
+#define kvm_msi_devid_required() (kvm_msi_use_devid)
+
#else
#define kvm_enabled() (0)
#define kvm_irqchip_in_kernel() (false)
@@ -184,6 +192,7 @@ extern bool kvm_ioeventfd_any_length_allowed;
#define kvm_readonly_mem_enabled() (false)
#define kvm_direct_msi_enabled() (false)
#define kvm_ioeventfd_any_length_enabled() (false)
+#define kvm_msi_devid_required() (false)
#endif
struct kvm_run;
diff --git a/kvm-all.c b/kvm-all.c
index 8a4382e..25e12c2 100644
--- a/kvm-all.c
+++ b/kvm-all.c
@@ -119,6 +119,7 @@ bool kvm_readonly_mem_allowed;
bool kvm_vm_attributes_allowed;
bool kvm_direct_msi_allowed;
bool kvm_ioeventfd_any_length_allowed;
+bool kvm_msi_use_devid;
static const KVMCapabilityInfo kvm_required_capabilites[] = {
KVM_CAP_INFO(USER_MEMORY),
@@ -1275,6 +1276,10 @@ int kvm_irqchip_add_msi_route(KVMState *s, int vector,
PCIDevice *dev)
kroute.u.msi.address_lo = (uint32_t)msg.address;
kroute.u.msi.address_hi = msg.address >> 32;
kroute.u.msi.data = le32_to_cpu(msg.data);
+ if (kvm_msi_devid_required()) {
+ kroute.flags = KVM_MSI_VALID_DEVID;
+ kroute.u.msi.devid = pci_requester_id(dev);
+ }
if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
kvm_irqchip_release_virq(s, virq);
return -EINVAL;
@@ -1308,6 +1313,10 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq,
MSIMessage msg,
kroute.u.msi.address_lo = (uint32_t)msg.address;
kroute.u.msi.address_hi = msg.address >> 32;
kroute.u.msi.data = le32_to_cpu(msg.data);
+ if (kvm_msi_devid_required()) {
+ kroute.flags = KVM_MSI_VALID_DEVID;
+ kroute.u.msi.devid = pci_requester_id(dev);
+ }
if (kvm_arch_fixup_msi_route(&kroute, msg.address, msg.data, dev)) {
return -EINVAL;
}
diff --git a/kvm-stub.c b/kvm-stub.c
index 3227127..b1b6b96 100644
--- a/kvm-stub.c
+++ b/kvm-stub.c
@@ -31,6 +31,7 @@ bool kvm_gsi_direct_mapping;
bool kvm_allowed;
bool kvm_readonly_mem_allowed;
bool kvm_ioeventfd_any_length_allowed;
+bool kvm_msi_use_devid;
int kvm_destroy_vcpu(CPUState *cpu)
{
--
2.5.5
- [Qemu-arm] [PATCH v7 0/8] vITS support, Eric Auger, 2016/09/23
- [Qemu-arm] [PATCH v7 1/8] hw/intc/arm_gic(v3)_kvm: Initialize gsi routing, Eric Auger, 2016/09/23
- [Qemu-arm] [PATCH v7 2/8] hw/intc/arm_gicv3_its: Implement ITS base class, Eric Auger, 2016/09/23
- [Qemu-arm] [PATCH v7 3/8] target-arm: move gicv3_class_name from machine to kvm_arm.h, Eric Auger, 2016/09/23
- [Qemu-arm] [PATCH v7 4/8] kvm-all: Pass requester ID to MSI routing functions,
Eric Auger <=
- [Qemu-arm] [PATCH v7 5/8] hw/intc/arm_gicv3_its: Implement support for in-kernel ITS emulation, Eric Auger, 2016/09/23
- [Qemu-arm] [PATCH v7 6/8] arm/virt: Add ITS to the virt board, Eric Auger, 2016/09/23
- [Qemu-arm] [PATCH v7 7/8] ACPI: Add GIC Interrupt Translation Service Structure definition, Eric Auger, 2016/09/23
- [Qemu-arm] [PATCH v7 8/8] ARM: Virt: ACPI: Add GIC ITS description in ACPI MADT table, Eric Auger, 2016/09/23
- Re: [Qemu-arm] [PATCH v7 0/8] vITS support, Peter Maydell, 2016/09/29