Commit-ID: bfd202352970db873e5af98b1e2cbe5336648f88
Gitweb: https://git.kernel.org/tip/bfd202352970db873e5af98b1e2cbe5336648f88
Author: Reinette Chatre <reinette.chatre@xxxxxxxxx>
AuthorDate: Tue, 29 May 2018 05:57:36 -0700
Committer: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
CommitDate: Wed, 20 Jun 2018 00:56:30 +0200
x86/intel_rdt: Support flexible data to parsing callbacks
Each resource is associated with a configurable callback that should be
used to parse the information provided for the particular resource from
user space. In addition to the resource and domain pointers this callback
is provided with just the character buffer being parsed.
In support of flexible parsing the callback is modified to support a void
pointer as argument. This enables resources that need more data than just
the user provided data to pass its required data to the callback without
affecting the signatures for the callbacks of all the other resources.
Signed-off-by: Reinette Chatre <reinette.chatre@xxxxxxxxx>
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: fenghua.yu@xxxxxxxxx
Cc: tony.luck@xxxxxxxxx
Cc: vikas.shivappa@xxxxxxxxxxxxxxx
Cc: gavin.hindman@xxxxxxxxx
Cc: jithu.joseph@xxxxxxxxx
Cc: dave.hansen@xxxxxxxxx
Cc: hpa@xxxxxxxxx
Link: https://lkml.kernel.org/r/acc9cc5919df395755fc945dee4fcf1ed1484867.1527593970.git.reinette.chatre@xxxxxxxxx
---
arch/x86/kernel/cpu/intel_rdt.h | 6 +++---
arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c | 6 ++++--
2 files changed, 7 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/cpu/intel_rdt.h b/arch/x86/kernel/cpu/intel_rdt.h
index 399bb94e865b..c0c0ef817f11 100644
--- a/arch/x86/kernel/cpu/intel_rdt.h
+++ b/arch/x86/kernel/cpu/intel_rdt.h
@@ -371,7 +371,7 @@ struct rdt_resource {
struct rdt_cache cache;
struct rdt_membw membw;
const char *format_str;
- int (*parse_ctrlval) (char *buf, struct rdt_resource *r,
+ int (*parse_ctrlval) (void *data, struct rdt_resource *r,
struct rdt_domain *d);
struct list_head evt_list;
int num_rmid;
@@ -379,8 +379,8 @@ struct rdt_resource {
unsigned long fflags;
};
-int parse_cbm(char *buf, struct rdt_resource *r, struct rdt_domain *d);
-int parse_bw(char *buf, struct rdt_resource *r, struct rdt_domain *d);
+int parse_cbm(void *_data, struct rdt_resource *r, struct rdt_domain *d);
+int parse_bw(void *_buf, struct rdt_resource *r, struct rdt_domain *d);
extern struct mutex rdtgroup_mutex;
diff --git a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
index b3da5b981dd8..ab4bb8731825 100644
--- a/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
+++ b/arch/x86/kernel/cpu/intel_rdt_ctrlmondata.c
@@ -64,9 +64,10 @@ static bool bw_validate(char *buf, unsigned long *data, struct rdt_resource *r)
return true;
}
-int parse_bw(char *buf, struct rdt_resource *r, struct rdt_domain *d)
+int parse_bw(void *_buf, struct rdt_resource *r, struct rdt_domain *d)
{
unsigned long data;
+ char *buf = _buf;
if (d->have_new_ctrl) {
rdt_last_cmd_printf("duplicate domain %d\n", d->id);
@@ -126,8 +127,9 @@ static bool cbm_validate(char *buf, u32 *data, struct rdt_resource *r)
* Read one cache bit mask (hex). Check that it is valid for the current
* resource type.
*/
-int parse_cbm(char *buf, struct rdt_resource *r, struct rdt_domain *d)
+int parse_cbm(void *_data, struct rdt_resource *r, struct rdt_domain *d)
{
+ char *buf = _data;
u32 cbm_val;
if (d->have_new_ctrl) {
--
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