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

Commit db11f12a authored by K. Y. Srinivasan's avatar K. Y. Srinivasan Committed by Greg Kroah-Hartman
Browse files

Drivers: hv: Manage event tasklets on per-cpu basis 



Now that we can potentially take vmbus interrupts on any CPU, make the
tasklets per-CPU.

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 01986313

drivers/hv/hv.c

+12 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 
#include <linux/vmalloc.h>

#include <linux/hyperv.h>

#include <linux/version.h>

#include <linux/interrupt.h>

#include <asm/hyperv.h>

#include "hyperv_vmbus.h"
@@ -137,6 +138,8 @@ int hv_init(void) 
	       sizeof(void *) * NR_CPUS);

	memset(hv_context.vp_index, 0,

	       sizeof(int) * NR_CPUS);

	memset(hv_context.event_dpc, 0,

	       sizeof(void *) * NR_CPUS);



	max_leaf = query_hypervisor_info();
@@ -285,6 +288,15 @@ void hv_synic_init(void *irqarg) 
	/* Check the version */

	rdmsrl(HV_X64_MSR_SVERSION, version);



	hv_context.event_dpc[cpu] = (struct tasklet_struct *)

					kmalloc(sizeof(struct tasklet_struct),

						GFP_ATOMIC);

	if (hv_context.event_dpc[cpu] == NULL) {

		pr_err("Unable to allocate event dpc\n");

		goto cleanup;

	}

	tasklet_init(hv_context.event_dpc[cpu], vmbus_on_event, cpu);



	hv_context.synic_message_page[cpu] =

		(void *)get_zeroed_page(GFP_ATOMIC);

drivers/hv/hyperv_vmbus.h

+6 −0
Original line number Diff line number Diff line
@@ -504,6 +504,12 @@ struct hv_context { 
	 * Linux cpuid 'a'.

	 */

	u32 vp_index[NR_CPUS];

	/*

	 * Starting with win8, we can take channel interrupts on any CPU;

	 * we will manage the tasklet that handles events on a per CPU

	 * basis.

	 */

	struct tasklet_struct *event_dpc[NR_CPUS];

};



extern struct hv_context hv_context;

drivers/hv/vmbus_drv.c

+1 −3
Original line number Diff line number Diff line
@@ -41,7 +41,6 @@ 
static struct acpi_device  *hv_acpi_dev;



static struct tasklet_struct msg_dpc;

static struct tasklet_struct event_dpc;

static struct completion probe_event;

static int irq;
@@ -483,7 +482,7 @@ static irqreturn_t vmbus_isr(int irq, void *dev_id) 
	}



	if (handled)

		tasklet_schedule(&event_dpc);

		tasklet_schedule(hv_context.event_dpc[cpu]);





	page_addr = hv_context.synic_message_page[cpu];
@@ -523,7 +522,6 @@ static int vmbus_bus_init(int irq) 
	}



	tasklet_init(&msg_dpc, vmbus_on_msg_dpc, 0);

	tasklet_init(&event_dpc, vmbus_on_event, 0);



	ret = bus_register(&hv_bus);

	if (ret)