[Xen-devel] [PATCH v3 14/15] x86: Add L2 CAT interfaces in sysctl.

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

This patch adds L2 CAT interface to get HW info in sysctl.

Signed-off-by: He Chen <he.chen@xxxxxxxxxxxxxxx>
Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
---
 xen/arch/x86/sysctl.c       | 13 +++++++++++++
 xen/include/public/sysctl.h |  6 ++++++
 2 files changed, 19 insertions(+)

diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index e82adec..a66f049 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -192,6 +192,19 @@ long arch_do_sysctl(
                 ret = -EFAULT;
             break;
         }
+        case XEN_SYSCTL_PSR_CAT_get_l2_info:
+        {
+            uint32_t dat[2];
+            ret = psr_get_info(sysctl->u.psr_cat_op.target,
+                               PSR_CBM_TYPE_L2,
+                               dat, 2);
+            sysctl->u.psr_cat_op.u.l2_info.cbm_len = dat[CBM_LEN];
+            sysctl->u.psr_cat_op.u.l2_info.cos_max = dat[COS_MAX];
+
+            if ( !ret && __copy_field_to_guest(u_sysctl, sysctl, u.psr_cat_op) 
)
+                ret = -EFAULT;
+            break;
+        }
         default:
             ret = -EOPNOTSUPP;
             break;
diff --git a/xen/include/public/sysctl.h b/xen/include/public/sysctl.h
index 418f4bb..0a0c9f7 100644
--- a/xen/include/public/sysctl.h
+++ b/xen/include/public/sysctl.h
@@ -745,6 +745,7 @@ typedef struct xen_sysctl_pcitopoinfo 
xen_sysctl_pcitopoinfo_t;
 DEFINE_XEN_GUEST_HANDLE(xen_sysctl_pcitopoinfo_t);
 
 #define XEN_SYSCTL_PSR_CAT_get_l3_info               0
+#define XEN_SYSCTL_PSR_CAT_get_l2_info               1
 struct xen_sysctl_psr_cat_op {
     uint32_t cmd;       /* IN: XEN_SYSCTL_PSR_CAT_* */
     uint32_t target;    /* IN */
@@ -755,6 +756,11 @@ struct xen_sysctl_psr_cat_op {
 #define XEN_SYSCTL_PSR_CAT_L3_CDP       (1u << 0)
             uint32_t flags;     /* OUT: CAT flags */
         } l3_info;
+
+        struct {
+            uint32_t cbm_len;   /* OUT: CBM length */
+            uint32_t cos_max;   /* OUT: Maximum COS */
+        } l2_info;
     } u;
 };
 typedef struct xen_sysctl_psr_cat_op xen_sysctl_psr_cat_op_t;
-- 
2.7.4


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