[Xen-devel] [PATCH v2 2/5] tools: add routine to get CMT L3 event mask

[Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>]

This is the tools side wrapper for XEN_SYSCTL_PSR_CMT_get_l3_event_mask
of XEN_SYSCTL_psr_cmt_op.

Signed-off-by: Chao Peng <chao.p.peng@xxxxxxxxxxxxxxx>
---
 tools/libxc/include/xenctrl.h |    1 +
 tools/libxc/xc_psr.c          |   24 ++++++++++++++++++++++++
 tools/libxl/libxl.h           |    1 +
 tools/libxl/libxl_psr.c       |   18 ++++++++++++++++++
 4 files changed, 44 insertions(+)

diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 0ad8b8d..96b357c 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -2697,6 +2697,7 @@ int xc_psr_cmt_get_domain_rmid(xc_interface *xch, 
uint32_t domid,
 int xc_psr_cmt_get_total_rmid(xc_interface *xch, uint32_t *total_rmid);
 int xc_psr_cmt_get_l3_upscaling_factor(xc_interface *xch,
     uint32_t *upscaling_factor);
+int xc_psr_cmt_get_l3_event_mask(xc_interface *xch, uint32_t *event_mask);
 int xc_psr_cmt_get_l3_cache_size(xc_interface *xch, uint32_t cpu,
     uint32_t *l3_cache_size);
 int xc_psr_cmt_get_data(xc_interface *xch, uint32_t rmid,
diff --git a/tools/libxc/xc_psr.c b/tools/libxc/xc_psr.c
index 872e6dc..e76a0f9 100644
--- a/tools/libxc/xc_psr.c
+++ b/tools/libxc/xc_psr.c
@@ -112,6 +112,30 @@ int xc_psr_cmt_get_l3_upscaling_factor(xc_interface *xch,
     return rc;
 }
 
+int xc_psr_cmt_get_l3_event_mask(xc_interface *xch, uint32_t *event_mask)
+{
+    static int val = 0;
+    int rc;
+    DECLARE_SYSCTL;
+
+    if ( val )
+    {
+        *event_mask = val;
+        return 0;
+    }
+
+    sysctl.cmd = XEN_SYSCTL_psr_cmt_op;
+    sysctl.u.psr_cmt_op.cmd =
+        XEN_SYSCTL_PSR_CMT_get_l3_event_mask;
+    sysctl.u.psr_cmt_op.flags = 0;
+
+    rc = xc_sysctl(xch, &sysctl);
+    if ( !rc )
+        val = *event_mask = sysctl.u.psr_cmt_op.u.data;
+
+    return rc;
+}
+
 int xc_psr_cmt_get_l3_cache_size(xc_interface *xch, uint32_t cpu,
                                       uint32_t *l3_cache_size)
 {
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index 0a123f1..42ace76 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -1453,6 +1453,7 @@ int libxl_psr_cmt_attach(libxl_ctx *ctx, uint32_t domid);
 int libxl_psr_cmt_detach(libxl_ctx *ctx, uint32_t domid);
 int libxl_psr_cmt_domain_attached(libxl_ctx *ctx, uint32_t domid);
 int libxl_psr_cmt_enabled(libxl_ctx *ctx);
+int libxl_psr_cmt_type_supported(libxl_ctx *ctx, libxl_psr_cmt_type type);
 int libxl_psr_cmt_get_total_rmid(libxl_ctx *ctx, uint32_t *total_rmid);
 int libxl_psr_cmt_get_l3_cache_size(libxl_ctx *ctx, uint32_t socketid,
     uint32_t *l3_cache_size);
diff --git a/tools/libxl/libxl_psr.c b/tools/libxl/libxl_psr.c
index 0437465..3018a0d 100644
--- a/tools/libxl/libxl_psr.c
+++ b/tools/libxl/libxl_psr.c
@@ -120,6 +120,24 @@ int libxl_psr_cmt_enabled(libxl_ctx *ctx)
     return xc_psr_cmt_enabled(ctx->xch);
 }
 
+int libxl_psr_cmt_type_supported(libxl_ctx *ctx, libxl_psr_cmt_type type)
+{
+    GC_INIT(ctx);
+    uint32_t event_mask;
+    int ret;
+
+    ret = xc_psr_cmt_get_l3_event_mask(ctx->xch, &event_mask);
+    if (ret < 0) {
+        libxl__psr_cmt_log_err_msg(gc, errno);
+        ret = 0;
+    } else {
+        ret = event_mask & (1 << (type - 1));
+    }
+
+    GC_FREE;
+    return ret;
+}
+
 int libxl_psr_cmt_get_total_rmid(libxl_ctx *ctx, uint32_t *total_rmid)
 {
     GC_INIT(ctx);
-- 
1.7.9.5


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