qemu-devel
[Top][All Lists]
Advanced

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

[Qemu-devel] [PATCH V4 17/19] virtio-pci: increase the maximum number of


From: Jason Wang
Subject: [Qemu-devel] [PATCH V4 17/19] virtio-pci: increase the maximum number of virtqueues to 513
Date: Wed, 18 Mar 2015 17:35:07 +0800

This patch increases the maximum number of virtqueues for pci from 64
to 513. This will allow booting a virtio-net-pci device with 256 queue
pairs.

To keep migration compatibility, 64 was kept for legacy machine
types. This is because qemu in fact allows guest to probe the limit of
virtqueues through trying to set queue_sel. So for legacy machine
type, we should make sure setting queue_sel to more than 63 won't
make effect.

Cc: Paolo Bonzini <address@hidden>
Cc: Richard Henderson <address@hidden>
Cc: Michael S. Tsirkin <address@hidden>
Cc: Alexander Graf <address@hidden>
Cc: address@hidden
Signed-off-by: Jason Wang <address@hidden>
---
 hw/i386/pc_piix.c      | 5 +++++
 hw/i386/pc_q35.c       | 5 +++++
 hw/ppc/spapr.c         | 5 +++++
 hw/virtio/virtio-pci.c | 2 +-
 4 files changed, 16 insertions(+), 1 deletion(-)

diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 175e582..0796719 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -49,6 +49,7 @@
 #include "hw/acpi/acpi.h"
 #include "cpu.h"
 #include "qemu/error-report.h"
+#include "hw/virtio/virtio-bus.h"
 #ifdef CONFIG_XEN
 #  include <xen/hvm/hvm_info_table.h>
 #endif
@@ -312,6 +313,10 @@ static void pc_init_pci(MachineState *machine)
 
 static void pc_compat_2_3(MachineState *machine)
 {
+    ObjectClass *klass = object_class_by_name("virtio-pci-bus");
+    VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+
+    k->queue_max = 64;
 }
 
 static void pc_compat_2_2(MachineState *machine)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index df44d25..a8a34a4 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -45,6 +45,7 @@
 #include "hw/usb.h"
 #include "hw/cpu/icc_bus.h"
 #include "qemu/error-report.h"
+#include "include/hw/virtio/virtio-bus.h"
 
 /* ICH9 AHCI has 6 ports */
 #define MAX_SATA_PORTS     6
@@ -291,6 +292,10 @@ static void pc_q35_init(MachineState *machine)
 
 static void pc_compat_2_3(MachineState *machine)
 {
+    ObjectClass *klass = object_class_by_name("virtio-pci-bus");
+    VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+
+    k->queue_max = 64;
 }
 
 static void pc_compat_2_2(MachineState *machine)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 22f4ae4..5f25dd3 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -50,6 +50,7 @@
 #include "hw/pci/pci.h"
 #include "hw/scsi/scsi.h"
 #include "hw/virtio/virtio-scsi.h"
+#include "hw/virtio/virtio-bus.h"
 
 #include "exec/address-spaces.h"
 #include "hw/usb.h"
@@ -1805,6 +1806,10 @@ static const TypeInfo spapr_machine_info = {
 
 static void spapr_compat_2_3(Object *obj)
 {
+    ObjectClass *klass = object_class_by_name("virtio-pci-bus");
+    VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+
+    k->queue_max = 64;
 }
 
 static void spapr_compat_2_2(Object *obj)
diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
index 9a5242a..02e3ce8 100644
--- a/hw/virtio/virtio-pci.c
+++ b/hw/virtio/virtio-pci.c
@@ -42,7 +42,7 @@
  * configuration space */
 #define VIRTIO_PCI_CONFIG_SIZE(dev)     
VIRTIO_PCI_CONFIG_OFF(msix_enabled(dev))
 
-#define VIRTIO_PCI_QUEUE_MAX 64
+#define VIRTIO_PCI_QUEUE_MAX 513
 
 static void virtio_pci_bus_new(VirtioBusState *bus, size_t bus_size,
                                VirtIOPCIProxy *dev);
-- 
2.1.0




reply via email to

[Prev in Thread] Current Thread [Next in Thread]