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>
Reviewed-by: Jan Beulich <jbeul...@suse.com>
---
v12:
- remove input parameter 'info' in 'psr_cbm_type_to_feat_type'. Use
'feat_props' array to check.
(suggested by Jan Beulich)
v11:
- modify 'psr_get_info' flow to make it simple to cover CDP case.
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 | 21 ++++++++++++++++++++-
1 file changed, 20 insertions(+), 1 deletion(-)
diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index 35b78f6..a9e1b56 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -222,7 +222,21 @@ static enum psr_feat_type psr_cbm_type_to_feat_type(enum
cbm_type type)
{
case PSR_CBM_TYPE_L3:
feat_type = FEAT_TYPE_L3_CAT;
+
+ /*
+ * If type is L3 CAT but we cannot find it in feat_props array,
+ * try CDP.
+ */
+ if ( !feat_props[feat_type] )
+ feat_type = FEAT_TYPE_L3_CDP;
+
+ break;
+
+ case PSR_CBM_TYPE_L3_DATA:
+ case PSR_CBM_TYPE_L3_CODE:
+ feat_type = FEAT_TYPE_L3_CDP;
break;
+
default:
ASSERT_UNREACHABLE();
}
@@ -350,7 +364,12 @@ static const struct feat_props l3_cat_props = {
static bool l3_cdp_get_feat_info(const struct feat_node *feat,
uint32_t data[], uint32_t array_len)
{
- return false;
+ 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 void l3_cdp_write_msr(unsigned int cos, uint32_t val, enum cbm_type
type)
--
1.9.1
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