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Commit ca03258b authored by Sukadev Bhattiprolu's avatar Sukadev Bhattiprolu Committed by Michael Ellerman
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powerpc/vas: Create cpu to vas id mapping 



Create a cpu to vasid mapping so callers can specify -1 instead of
trying to find a VAS id.

Changelog[v2]
	[Michael Ellerman] Use per-cpu variables to simplify code.

Signed-off-by: default avatarSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 6fccac16

arch/powerpc/platforms/powernv/vas.c

+13 −1
Original line number Diff line number Diff line
@@ -18,15 +18,18 @@ 
#include <linux/of_platform.h>

#include <linux/of_address.h>

#include <linux/of.h>

#include <asm/prom.h>



#include "vas.h"



static DEFINE_MUTEX(vas_mutex);

static LIST_HEAD(vas_instances);



static DEFINE_PER_CPU(int, cpu_vas_id);



static int init_vas_instance(struct platform_device *pdev)

{

	int rc, vasid;

	int rc, cpu, vasid;

	struct resource *res;

	struct vas_instance *vinst;

	struct device_node *dn = pdev->dev.of_node;
@@ -74,6 +77,11 @@ static int init_vas_instance(struct platform_device *pdev) 
			"paste_win_id_shift 0x%llx\n", pdev->name, vasid,

			vinst->paste_base_addr, vinst->paste_win_id_shift);



	for_each_possible_cpu(cpu) {

		if (cpu_to_chip_id(cpu) == of_get_ibm_chip_id(dn))

			per_cpu(cpu_vas_id, cpu) = vasid;

	}



	mutex_lock(&vas_mutex);

	list_add(&vinst->node, &vas_instances);

	mutex_unlock(&vas_mutex);
@@ -98,6 +106,10 @@ struct vas_instance *find_vas_instance(int vasid) 
	struct vas_instance *vinst;



	mutex_lock(&vas_mutex);



	if (vasid == -1)

		vasid = per_cpu(cpu_vas_id, smp_processor_id());



	list_for_each(ent, &vas_instances) {

		vinst = list_entry(ent, struct vas_instance, node);

		if (vinst->vas_id == vasid) {