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Message-Id: <1337754751-9018-5-git-send-email-kernelfans@gmail.com>
Date: Wed, 23 May 2012 14:32:31 +0800
From: Liu Ping Fan <kernelfans@...il.com>
To: kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
qemu-devel@...gnu.org
Cc: Ingo Molnar <mingo@...hat.com>,
Peter Zijlstra <peterz@...radead.org>,
Avi Kivity <avi@...hat.com>,
Anthony Liguori <anthony@...emonkey.ws>
Subject: [PATCH] Qemu: add virt sched domain device
From: Liu Ping Fan <pingfank@...ux.vnet.ibm.com>
The device will demand the collection of vcpus' numa info, and
trigger the guest to rebuild the sched domain.
Signed-off-by: Liu Ping Fan <pingfank@...ux.vnet.ibm.com>
---
Makefile.target | 1 +
hmp-commands.hx | 16 +++++
hw/qdev.h | 1 +
hw/virt_sd.c | 155 +++++++++++++++++++++++++++++++++++++++++++++
linux-headers/linux/kvm.h | 8 ++-
5 files changed, 180 insertions(+), 1 deletions(-)
create mode 100644 hw/virt_sd.c
diff --git a/Makefile.target b/Makefile.target
index 4fbbabf..fded330 100644
--- a/Makefile.target
+++ b/Makefile.target
@@ -265,6 +265,7 @@ obj-i386-y += pci-hotplug.o smbios.o wdt_ib700.o
obj-i386-y += debugcon.o multiboot.o
obj-i386-y += pc_piix.o
obj-i386-y += pc_sysfw.o
+obj-i386-y += virt_sd.o
obj-i386-$(CONFIG_KVM) += kvm/clock.o kvm/apic.o kvm/i8259.o kvm/ioapic.o kvm/i8254.o
obj-i386-$(CONFIG_SPICE) += qxl.o qxl-logger.o qxl-render.o
diff --git a/hmp-commands.hx b/hmp-commands.hx
index 461fa59..47b826c 100644
--- a/hmp-commands.hx
+++ b/hmp-commands.hx
@@ -1254,6 +1254,22 @@ Change I/O throttle limits for a block drive to @var{bps} @var{bps_rd} @var{bps_
ETEXI
{
+ .name = "guest_numa_notify",
+ .args_type = "",
+ .params = "",
+ .help = "force guest to update numa info based on host",
+ .user_print = monitor_user_noop,
+ .mhandler.cmd_new = do_guest_numa_notify,
+ },
+
+STEXI
+@...m device_add @var{config}
+@...dex device_add
+
+Add device.
+ETEXI
+
+ {
.name = "block_set_io_throttle",
.args_type = "device:B,bps:l,bps_rd:l,bps_wr:l,iops:l,iops_rd:l,iops_wr:l",
.params = "device bps bps_rd bps_wr iops iops_rd iops_wr",
diff --git a/hw/qdev.h b/hw/qdev.h
index 4e90119..6902474 100644
--- a/hw/qdev.h
+++ b/hw/qdev.h
@@ -203,6 +203,7 @@ void do_info_qtree(Monitor *mon);
void do_info_qdm(Monitor *mon);
int do_device_add(Monitor *mon, const QDict *qdict, QObject **ret_data);
int do_device_del(Monitor *mon, const QDict *qdict, QObject **ret_data);
+int do_guest_numa_notify(Monitor *mon, const QDict *qdict, QObject **ret_data);
/*** qdev-properties.c ***/
diff --git a/hw/virt_sd.c b/hw/virt_sd.c
new file mode 100644
index 0000000..c3aece4
--- /dev/null
+++ b/hw/virt_sd.c
@@ -0,0 +1,155 @@
+/*
+ * Virt sched domain Support
+ *
+ * Copyright IBM, Corp. 2012
+ *
+ * Authors:
+ * Liu Ping Fan <pingfanl@...ux.vnet.ibm.com>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2. See
+ * the COPYING file in the top-level directory.
+ *
+*/
+#include "hw.h"
+#include "pci.h"
+#include "kvm.h"
+#include <linux/kvm.h>
+
+/* #define DEBUG_VSD */
+#ifdef DEBUG_VSD
+#define dprintf(fmt, ...) \
+ do { fprintf(stderr, fmt, ## __VA_ARGS__); } while (0)
+#else
+#define dprintf(fmt, ...) \
+ do { } while (0)
+#endif
+
+#define PCI_DEVICE_ID_CPUSTATE 0x1010
+
+typedef struct VirtSdState VirtSdState;
+typedef struct Regs Regs;
+
+#define VSD_REGS_SIZE 0x1000
+struct Regs {
+ unsigned int gpa_apic_node;
+ unsigned int size;
+};
+
+struct VirtSdState {
+ PCIDevice dev;
+ MemoryRegion mmio;
+ Regs regs;
+};
+
+static const VMStateDescription vmstate_vsd = {
+ .name = "vsd",
+ .version_id = 1,
+ .minimum_version_id = 0,
+ .fields = (VMStateField[]) {
+ VMSTATE_END_OF_LIST()
+ },
+};
+
+static VirtSdState *vsd_dev;
+
+static int update_guest_numa(void)
+{
+ int ret = 0;
+ target_phys_addr_t sz;
+ struct kvm_virt_sd vsd;
+ sz = vsd.sz = vsd_dev->regs.size;
+ vsd.vapic_map = cpu_physical_memory_map(vsd_dev->regs.gpa_apic_node,
+ &sz, 1);
+ ret = kvm_ioctl(kvm_state, KVM_SET_GUEST_NUMA, &vsd);
+ if (ret < 0) {
+ return -1;
+ } else {
+ qemu_set_irq(vsd_dev->dev.irq[0], 1);
+ qemu_set_irq(vsd_dev->dev.irq[0], 0);
+ }
+ return 0;
+}
+
+int do_guest_numa_notify(Monitor *mon, const QDict *qdict, QObject **ret_data)
+{
+ return update_guest_numa();
+}
+
+static void
+vsd_mmio_write(void *opaque, target_phys_addr_t addr, uint64_t val,
+ unsigned size)
+{
+ VirtSdState *vsd = opaque;
+ dprintf("vsd_mmio_write,addr=0x%lx, val=0x%lx\n", addr, val);
+ switch (addr) {
+ case 0:
+ vsd->regs.gpa_apic_node = val;
+ break;
+ case 4:
+ vsd->regs.size = val;
+ break;
+ default:
+ fprintf(stderr, "reg unimplemented\n");
+ break;
+ }
+}
+
+static uint64_t
+vsd_mmio_read(void *opaque, target_phys_addr_t addr, unsigned size)
+{
+ return 0;
+}
+
+static const MemoryRegionOps vsd_ops = {
+ .read = vsd_mmio_read,
+ .write = vsd_mmio_write,
+ .endianness = DEVICE_LITTLE_ENDIAN,
+};
+
+static int pci_vsd_init(PCIDevice *dev)
+{
+ uint8_t *pci_cfg = dev->config;
+ VirtSdState *s = DO_UPCAST(VirtSdState, dev, dev);
+ memory_region_init_io(&s->mmio, &vsd_ops, s, "vsd", VSD_REGS_SIZE);
+ vsd_dev = s;
+ pci_cfg[PCI_INTERRUPT_PIN] = 1;
+ pci_cfg[PCI_CAPABILITY_LIST] = 0xdc;
+ pci_register_bar(&s->dev, 0, PCI_BASE_ADDRESS_SPACE_MEMORY, &s->mmio);
+ return 0;
+}
+
+static int pci_vsd_exit(PCIDevice *dev)
+{
+ return 0;
+}
+
+static Property vsd_properties[] = {
+ DEFINE_PROP_END_OF_LIST(),
+};
+
+static void vsd_class_init(ObjectClass *klass, void *data)
+{
+ DeviceClass *dc = DEVICE_CLASS(klass);
+ PCIDeviceClass *k = PCI_DEVICE_CLASS(klass);
+
+ k->init = pci_vsd_init;
+ k->exit = pci_vsd_exit;
+ k->vendor_id = PCI_VENDOR_ID_IBM;
+ k->device_id = PCI_DEVICE_ID_CPUSTATE;
+ k->revision = 0x10;
+ k->class_id = PCI_CLASS_MEMORY_RAM;
+ dc->props = vsd_properties;
+}
+
+static TypeInfo vsd_info = {
+ .name = "vsd",
+ .parent = TYPE_PCI_DEVICE,
+ .instance_size = sizeof(VirtSdState),
+ .class_init = vsd_class_init,
+};
+
+static void vsd_register_types(void)
+{
+ type_register_static(&vsd_info);
+}
+type_init(vsd_register_types)
diff --git a/linux-headers/linux/kvm.h b/linux-headers/linux/kvm.h
index ee7bd9c..aa5aec3 100644
--- a/linux-headers/linux/kvm.h
+++ b/linux-headers/linux/kvm.h
@@ -448,7 +448,6 @@ struct kvm_ppc_pvinfo {
__u32 hcall[4];
__u8 pad[108];
};
-
#define KVMIO 0xAE
/* machine type bits, to be used as argument to KVM_CREATE_VM */
@@ -478,6 +477,7 @@ struct kvm_ppc_pvinfo {
#define KVM_TRACE_PAUSE __KVM_DEPRECATED_MAIN_0x07
#define KVM_TRACE_DISABLE __KVM_DEPRECATED_MAIN_0x08
+
/*
* Extension capability list.
*/
@@ -733,6 +733,7 @@ struct kvm_one_reg {
struct kvm_userspace_memory_region)
#define KVM_SET_TSS_ADDR _IO(KVMIO, 0x47)
#define KVM_SET_IDENTITY_MAP_ADDR _IOW(KVMIO, 0x48, __u64)
+#define KVM_SET_GUEST_NUMA _IOW(KVMIO, 0x49, struct kvm_virt_sd)
/* enable ucontrol for s390 */
struct kvm_s390_ucas_mapping {
@@ -913,4 +914,9 @@ struct kvm_assigned_msix_entry {
__u16 padding[3];
};
+struct kvm_virt_sd {
+ __u64 *vapic_map;
+ __u64 sz;
+};
+
#endif /* __LINUX_KVM_H */
--
1.7.4.4
--
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