This patch implements get HW info flow for CDP including L3 CDP callback
function. The flow is almost same as L3 CAT.
With this patch, 'psr-hwinfo' can work for L3 CDP.
Signed-off-by: Yi Sun <yi.y....@linux.intel.com>
---
v10:
- update renamed macros used by psr_get_info.
(suggested by Jan Beulich)
- change 'psr_get_info' flow to cover CDP case to make codes in sysctl
more simple.
(suggested by Jan Beulich)
- remove sysctl redundant codes after applying above changes.
(suggested by Jan Beulich)
v9:
- modify commit message to explain flow more clearly.
- reuse 'cat_get_feat_info' for CDP to reduce redundant codes.
(suggested by Roger Pau)
- fix coding style issues.
(suggested by Wei Liu and Roger Pau)
- rename macros used by psr_get_info to make them meaningful.
(suggested by Jan Beulich)
v5:
- rename 'dat[]' to 'data[]'.
(suggested by Jan Beulich)
- remove type check in callback function.
(suggested by Jan Beulich)
v4:
- create this patch to make codes easier to understand.
(suggested by Jan Beulich)
---
xen/arch/x86/psr.c | 24 ++++++++++++++++++++++++
1 file changed, 24 insertions(+)
diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index 58970fa..f0611ad 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -237,6 +237,10 @@ static enum psr_feat_type psr_cbm_type_to_feat_type(enum
cbm_type type)
case PSR_CBM_TYPE_L3:
feat_type = PSR_SOCKET_L3_CAT;
break;
+ case PSR_CBM_TYPE_L3_DATA:
+ case PSR_CBM_TYPE_L3_CODE:
+ feat_type = PSR_SOCKET_L3_CDP;
+ break;
default:
ASSERT_UNREACHABLE();
}
@@ -386,8 +390,20 @@ static struct feat_props l3_cat_props = {
};
/* L3 CDP ops */
+static bool l3_cdp_get_feat_info(const struct feat_node *feat,
+ uint32_t data[], uint32_t array_len)
+{
+ if ( !cat_get_feat_info(feat, data, array_len) )
+ return false;
+
+ data[PSR_INFO_IDX_CAT_FLAG] |= XEN_SYSCTL_PSR_CAT_L3_CDP;
+
+ return true;
+}
+
static struct feat_props l3_cdp_props = {
.cos_num = 2,
+ .get_feat_info = l3_cdp_get_feat_info,
};
static void __init parse_psr_bool(char *s, char *value, char *feature,
@@ -641,6 +657,14 @@ int psr_get_info(unsigned int socket, enum cbm_type type,
if ( IS_ERR(feat) )
return PTR_ERR(feat);
+ /* If type is L3 CAT but we cannot find it in feature array, try CDP. */
+ if ( !feat && type == PSR_CBM_TYPE_L3 )
+ {
+ feat = psr_get_feat(socket, PSR_CBM_TYPE_L3_CODE);
+ if ( IS_ERR(feat) )
+ return PTR_ERR(feat);
+ }
+
if ( !feat )
return -ENOENT;
--
1.9.1
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