[Xen-devel] [PATCH v4 15/24] x86: refactor psr: implement get value flow for CDP.

[Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>]

This patch implements L3 CDP get value callback function.

With this patch, 'psr-cat-show' can work for L3 CDP.

Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
---
 xen/arch/x86/psr.c | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index 99add7a..d0392ca 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -563,10 +563,29 @@ static bool l3_cdp_get_feat_info(const struct feat_node 
*feat,
     return true;
 }
 
+static bool l3_cdp_get_val(const struct feat_node *feat, unsigned int cos,
+                           enum cbm_type type, uint64_t *val)
+{
+    if ( type != PSR_CBM_TYPE_L3_DATA && type != PSR_CBM_TYPE_L3_CODE )
+        return false;
+
+    if ( cos > feat->info.l3_cdp_info.cos_max )
+        /* Use default value. */
+        cos = 0;
+
+    if ( type == PSR_CBM_TYPE_L3_DATA )
+        *val = get_cdp_data(feat, cos);
+    else
+        *val = get_cdp_code(feat, cos);
+
+    return true;
+}
+
 struct feat_ops l3_cdp_ops = {
     .init_feature = l3_cdp_init_feature,
     .get_max_cos_max = l3_cdp_get_max_cos_max,
     .get_feat_info = l3_cdp_get_feat_info,
+    .get_val = l3_cdp_get_val,
 };
 
 static void __init parse_psr_bool(char *s, char *value, char *feature,
-- 
1.9.1


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