diff options
| author | Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com> | 2017-11-07 18:23:49 -0800 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2017-11-12 09:03:08 +1100 |
| commit | ca03258b6b338b392c778bed9c7dd56e6a513012 (patch) | |
| tree | 459dddb448e79195c0ec68c9a5788193ebe7772b /arch/powerpc/platforms | |
| parent | 6fccac16c578c699bf0714a6c930b0ceb81305a0 (diff) | |
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: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Diffstat (limited to 'arch/powerpc/platforms')
| -rw-r--r-- | arch/powerpc/platforms/powernv/vas.c | 14 |
1 files changed, 13 insertions, 1 deletions
diff --git a/arch/powerpc/platforms/powernv/vas.c b/arch/powerpc/platforms/powernv/vas.c index 565a4878fefa..abb7090a22b4 100644 --- a/arch/powerpc/platforms/powernv/vas.c +++ b/arch/powerpc/platforms/powernv/vas.c @@ -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) { |