[v14,17/23] x86: L2 CAT: implement get hw info flow.

Commit Message

Yi Sun July 15, 2017, 12:31 a.m. UTC

This patch implements L2 CAT get HW info flow and interface in sysctl.

Signed-off-by: Yi Sun <[e-mail]>
Reviewed-by: Jan Beulich <[e-mail]>
---
v10:
    - modify macro name according to previous patch change.
      (suggested by Jan Beulich)
    - modify commit message.
v9:
    - reuse 'cat_get_feat_info' for L2 CAT to reduce redundant codes.
      (suggested by Roger Pau)
    - modify sysctl implementation of L2 CAT to input data[3] to use
      'cat_get_feat_info'.
      (suggested by Roger Pau)
    - modify macros names to newly defined ones.
      (suggested by Jan Beulich)
    - remove 'l2_info' to reuse 'l3_info'.
      (suggested by Jan Beulich)
    - modify macro name according to previous patch change.
      (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 because of codes architecture change.
      (suggested by Jan Beulich)
---
 xen/arch/x86/psr.c          |  4 ++++
 xen/arch/x86/sysctl.c       | 23 +++++++++++++++++++++--
 xen/include/public/sysctl.h |  1 +
 3 files changed, 26 insertions(+), 2 deletions(-)

Patch

diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index 320c2c7..1b1a36b 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -239,6 +239,10 @@  static enum psr_feat_type psr_cbm_type_to_feat_type(enum cbm_type type)
         feat_type = FEAT_TYPE_L3_CDP;
         break;
 
+    case PSR_CBM_TYPE_L2:
+        feat_type = FEAT_TYPE_L2_CAT;
+        break;
+
     default:
         ASSERT_UNREACHABLE();
     }
diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index c23270d..5e91755 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -174,10 +174,10 @@  long arch_do_sysctl(
     case XEN_SYSCTL_psr_cat_op:
         switch ( sysctl->u.psr_cat_op.cmd )
         {
-        case XEN_SYSCTL_PSR_CAT_get_l3_info:
-        {
             uint32_t data[PSR_INFO_ARRAY_SIZE];
 
+        case XEN_SYSCTL_PSR_CAT_get_l3_info:
+        {
             ret = psr_get_info(sysctl->u.psr_cat_op.target,
                                PSR_CBM_TYPE_L3, data, ARRAY_SIZE(data));
             if ( ret )
@@ -195,6 +195,25 @@  long arch_do_sysctl(
             break;
         }
 
+        case XEN_SYSCTL_PSR_CAT_get_l2_info:
+        {
+            ret = psr_get_info(sysctl->u.psr_cat_op.target,
+                               PSR_CBM_TYPE_L2, data, ARRAY_SIZE(data));
+            if ( ret )
+                break;
+
+            sysctl->u.psr_cat_op.u.l3_info.cos_max =
+                                      data[PSR_INFO_IDX_COS_MAX];
+            sysctl->u.psr_cat_op.u.l3_info.cbm_len =
+                                      data[PSR_INFO_IDX_CAT_CBM_LEN];
+            sysctl->u.psr_cat_op.u.l3_info.flags =
+                                      data[PSR_INFO_IDX_CAT_FLAG];
+
+            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 ee76a66..4c76d3a 100644
--- a/xen/include/public/sysctl.h
+++ b/xen/include/public/sysctl.h
@@ -744,6 +744,7 @@  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 */