shinys000114/linux
1
0
Fork 0
mirror of https://github.com/hardkernel/linux.git synced 2026-06-07 19:30:30 +09:00
Code Issues Packages Projects Releases Wiki Activity

UPSTREAM: arm64/sve: Make sysctl interface for SVE reusable by SME

Browse Source 
The vector length configuration for SME is very similar to that for SVE
so in order to allow reuse refactor the SVE configuration so that it takes
the vector type from the struct ctl_table. Since there's no dedicated space
for this we repurpose the extra1 field to store the vector type, this is
otherwise unused for integer sysctls.

Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20211210184133.320748-2-broonie@kernel.org
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
(cherry picked from commit 97bcbee404)
Signed-off-by: Will Deacon <willdeacon@google.com>
Bug: 233587962
Bug: 233588291
Change-Id: I5f29b5c91e812fb723b3fd84fc681ccb7bbd87ef
This commit is contained in:
Mark Brown
2021-12-10 18:40:57 +00:00
committed by Will Deacon
parent 6d05d0e9d2
commit 948ced36f9
1 changed files with 9 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

15
arch/arm64/kernel/fpsimd.c
View File

@@ -15,6 +15,7 @@
#include <linux/compiler.h>
#include <linux/cpu.h>
#include <linux/cpu_pm.h>
#include <linux/ctype.h>
#include <linux/kernel.h>
#include <linux/linkage.h>
#include <linux/irqflags.h>
@@ -416,12 +417,13 @@ static unsigned int find_supported_vector_length(enum vec_type type,
#if defined(CONFIG_ARM64_SVE) && defined(CONFIG_SYSCTL)
static int sve_proc_do_default_vl(struct ctl_table *table, int write,
static int vec_proc_do_default_vl(struct ctl_table *table, int write,
void *buffer, size_t *lenp, loff_t *ppos)
{
struct vl_info *info = &vl_info[ARM64_VEC_SVE];
struct vl_info *info = table->extra1;
enum vec_type type = info->type;
int ret;
int vl = get_sve_default_vl();
int vl = get_default_vl(type);
struct ctl_table tmp_table = {
.data = &vl,
.maxlen = sizeof(vl),
@@ -438,7 +440,7 @@ static int sve_proc_do_default_vl(struct ctl_table *table, int write,
if (!sve_vl_valid(vl))
return -EINVAL;
set_sve_default_vl(find_supported_vector_length(ARM64_VEC_SVE, vl));
set_default_vl(type, find_supported_vector_length(type, vl));
return 0;
}
@@ -446,7 +448,8 @@ static struct ctl_table sve_default_vl_table[] = {
{
.procname = "sve_default_vector_length",
.mode = 0644,
.proc_handler = sve_proc_do_default_vl,
.proc_handler = vec_proc_do_default_vl,
.extra1 = &vl_info[ARM64_VEC_SVE],
},
{ }
};
@@ -1117,7 +1120,7 @@ static void fpsimd_flush_thread_vl(enum vec_type type)
vl = get_default_vl(type);
if (WARN_ON(!sve_vl_valid(vl)))
vl = SVE_VL_MIN;
vl = vl_info[type].min_vl;
supported_vl = find_supported_vector_length(type, vl);
if (WARN_ON(supported_vl != vl))