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[Qemu-devel] [PATCH V2 09/11] virtio-pci: increase the maximum number of
From: |
Jason Wang |
Subject: |
[Qemu-devel] [PATCH V2 09/11] virtio-pci: increase the maximum number of virtqueues to 513 |
Date: |
Thu, 26 Feb 2015 15:04:44 +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.
Cc: Paolo Bonzini <address@hidden>
Cc: Richard Henderson <address@hidden>
Cc: Anthony Liguori <address@hidden>
Cc: Michael S. Tsirkin <address@hidden>
Signed-off-by: Jason Wang <address@hidden>
---
hw/i386/pc_piix.c | 6 ++++++
hw/i386/pc_q35.c | 5 +++++
include/hw/virtio/virtio.h | 2 +-
3 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 38b42b0..821d44c 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 "include/hw/virtio/virtio-bus.h"
#ifdef CONFIG_XEN
# include <xen/hvm/hvm_info_table.h>
#endif
@@ -310,6 +311,11 @@ static void pc_init_pci(MachineState *machine)
static void pc_compat_2_2(MachineState *machine)
{
+ ObjectClass *klass = object_class_by_name("virtio-pci-bus");
+ VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+
+ k->queue_max = 64;
+
x86_cpu_compat_set_features("kvm64", FEAT_1_EDX, 0, CPUID_VME);
x86_cpu_compat_set_features("kvm32", FEAT_1_EDX, 0, CPUID_VME);
x86_cpu_compat_set_features("Conroe", FEAT_1_EDX, 0, CPUID_VME);
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 63027ee..dc5ada4 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
@@ -289,6 +290,10 @@ static void pc_q35_init(MachineState *machine)
static void pc_compat_2_2(MachineState *machine)
{
+ ObjectClass *klass = object_class_by_name("virtio-pci-bus");
+ VirtioBusClass *k = VIRTIO_BUS_CLASS(klass);
+
+ k->queue_max = 64;
x86_cpu_compat_set_features("kvm64", FEAT_1_EDX, 0, CPUID_VME);
x86_cpu_compat_set_features("kvm32", FEAT_1_EDX, 0, CPUID_VME);
x86_cpu_compat_set_features("Conroe", FEAT_1_EDX, 0, CPUID_VME);
diff --git a/include/hw/virtio/virtio.h b/include/hw/virtio/virtio.h
index e538f5a..c653ad1 100644
--- a/include/hw/virtio/virtio.h
+++ b/include/hw/virtio/virtio.h
@@ -92,7 +92,7 @@ typedef struct VirtQueueElement
struct iovec out_sg[VIRTQUEUE_MAX_SIZE];
} VirtQueueElement;
-#define VIRTIO_PCI_QUEUE_MAX 64
+#define VIRTIO_PCI_QUEUE_MAX 513
#define VIRTIO_CCW_QUEUE_MAX 64
#define VIRTIO_S390_QUEUE_MAX 64
#define VIRTIO_MMIO_QUEUE_MAX 64
--
1.9.1
- Re: [Qemu-devel] [PATCH V2 04/11] virtio-ccw: introduce ccw specific queue limit, (continued)
[Qemu-devel] [PATCH V2 07/11] virtio-mmio: switch to bus specific queue limit, Jason Wang, 2015/02/26
[Qemu-devel] [PATCH V2 06/11] virtio-s390: switch to bus specific queue limit, Jason Wang, 2015/02/26
[Qemu-devel] [PATCH V2 09/11] virtio-pci: increase the maximum number of virtqueues to 513,
Jason Wang <=
[Qemu-devel] [PATCH V2 08/11] virtio-pci: switch to use bus specific queue limit, Jason Wang, 2015/02/26
[Qemu-devel] [PATCH V2 10/11] pci: remove hard-coded bar size in msix_init_exclusive_bar(), Jason Wang, 2015/02/26
[Qemu-devel] [PATCH V2 11/11] virtio-pci: introduce auto_msix_bar_size property, Jason Wang, 2015/02/26