Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit b0209501 authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Drivers: hv: Handle vmbus interrupts concurrently on all cpus 



Vmbus interrupts are unique in that while the interrupt is delivered on a
given vector, these can be handled concurrently on different CPUs. Handle the
vmbus interrupts concurrently on all the CPUs.

Signed-off-by: default avatarK. Y. Srinivasan <kys@microsoft.com>
Reviewed-by: default avatarHaiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent db11f12a

drivers/hv/hv.c

+1 −1
Original line number Original line Diff line number Diff line
@@ -335,7 +335,7 @@ void hv_synic_init(void *irqarg) 
	shared_sint.as_uint64 = 0;

	shared_sint.as_uint64 = 0;

	shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */

	shared_sint.vector = irq_vector; /* HV_SHARED_SINT_IDT_VECTOR + 0x20; */

	shared_sint.masked = false;

	shared_sint.masked = false;

	shared_sint.auto_eoi = false;

	shared_sint.auto_eoi = true;





	wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);

	wrmsrl(HV_X64_MSR_SINT0 + VMBUS_MESSAGE_SINT, shared_sint.as_uint64);

drivers/hv/vmbus_drv.c

+21 −0
Original line number Original line Diff line number Diff line
@@ -33,6 +33,7 @@ 
#include <acpi/acpi_bus.h>

#include <acpi/acpi_bus.h>

#include <linux/completion.h>

#include <linux/completion.h>

#include <linux/hyperv.h>

#include <linux/hyperv.h>

#include <linux/kernel_stat.h>

#include <asm/hyperv.h>

#include <asm/hyperv.h>

#include <asm/hypervisor.h>

#include <asm/hypervisor.h>

#include "hyperv_vmbus.h"

#include "hyperv_vmbus.h"
@@ -500,6 +501,19 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id) 
		return IRQ_NONE;

		return IRQ_NONE;

}

}





/*

 * vmbus interrupt flow handler:

 * vmbus interrupts can concurrently occur on multiple CPUs and

 * can be handled concurrently.

 */



void vmbus_flow_handler(unsigned int irq, struct irq_desc *desc)

{

	kstat_incr_irqs_this_cpu(irq, desc);



	desc->action->handler(irq, desc->action->dev_id);

}



/*

/*

 * vmbus_bus_init -Main vmbus driver initialization routine.

 * vmbus_bus_init -Main vmbus driver initialization routine.

 *

 *
@@ -535,6 +549,13 @@ static int vmbus_bus_init(int irq) 
		goto err_unregister;

		goto err_unregister;

	}

	}





	/*

	 * Vmbus interrupts can be handled concurrently on

	 * different CPUs. Establish an appropriate interrupt flow

	 * handler that can support this model.

	 */

	irq_set_handler(irq, vmbus_flow_handler);



	vector = IRQ0_VECTOR + irq;

	vector = IRQ0_VECTOR + irq;





	/*

	/*