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OpenCloudOS-Kernel
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Drivers: hv: vmbus: Use the new infrastructure for delivering VMBUS interrupts 

Use the infrastructure for delivering VMBUS interrupts using a
special vector. With this patch, we can now properly handle
the VMBUS interrupts that can be delivered on any CPU. Also,
turn on interrupt load balancing as well.

This patch requires the infrastructure that was implemented in the patch:
X86: Handle Hyper-V vmbus interrupts as special hypervisor interrupts

Signed-off-by: K. Y. Srinivasan <kys@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
K. Y. Srinivasan 2013-02-17 11:30:44 -08:00 committed by Greg Kroah-Hartman
parent 0988496433
commit 302a3c0f27
3 changed files with 10 additions and 8 deletions
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2
drivers/hv/channel_mgmt.c
View File

@ -318,7 +318,7 @@ static u32 get_vp_index(uuid_le *type_guid)
return 0;
}
cur_cpu = (++next_vp % max_cpus);
return 0;
return cur_cpu;
}
/*

5
drivers/hv/hv.c
View File

@ -272,7 +272,7 @@ u16 hv_signal_event(void *con_id)
* retrieve the initialized message and event pages. Otherwise, we create and
* initialize the message and event pages.
*/
void hv_synic_init(void *irqarg)
void hv_synic_init(void *arg)
{
u64 version;
union hv_synic_simp simp;
@ -281,7 +281,6 @@ void hv_synic_init(void *irqarg)
union hv_synic_scontrol sctrl;
u64 vp_index;
u32 irq_vector = *((u32 *)(irqarg));
int cpu = smp_processor_id();
if (!hv_context.hypercall_page)
@ -335,7 +334,7 @@ void hv_synic_init(void *irqarg)
rdmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);
shared_sint.as_uint64 = 0;
shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */
shared_sint.vector = HYPERVISOR_CALLBACK_VECTOR;
shared_sint.masked = false;
shared_sint.auto_eoi = true;

11
drivers/hv/vmbus_drv.c
View File

@ -36,6 +36,7 @@
#include <linux/kernel_stat.h>
#include <asm/hyperv.h>
#include <asm/hypervisor.h>
#include <asm/mshyperv.h>
#include "hyperv_vmbus.h"
@ -528,7 +529,6 @@ static void vmbus_flow_handler(unsigned int irq, struct irq_desc *desc)
static int vmbus_bus_init(int irq)
{
int ret;
unsigned int vector;
/* Hypervisor initialization...setup hypercall page..etc */
ret = hv_init();
@ -558,13 +558,16 @@ static int vmbus_bus_init(int irq)
*/
irq_set_handler(irq, vmbus_flow_handler);
vector = IRQ0_VECTOR + irq;
/*
* Register our interrupt handler.
*/
hv_register_vmbus_handler(irq, vmbus_isr);
/*
* Notify the hypervisor of our irq and
* Initialize the per-cpu interrupt state and
* connect to the host.
*/
on_each_cpu(hv_synic_init, (void *)&vector, 1);
on_each_cpu(hv_synic_init, NULL, 1);
ret = vmbus_connect();
if (ret)
goto err_irq;