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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v4 21/24] tools: L2 CAT: support get HW info for L2 CAT.
This patch implements xl/xc changes to support get HW info
for L2 CAT.
'xl psr-hwinfo' is updated to show both L3 CAT and L2 CAT
info.
Example(on machine which only supports L2 CAT):
Cache Monitoring Technology (CMT):
Enabled : 0
Cache Allocation Technology (CAT): L3
libxl: error: libxl_psr.c:100:libxl__psr_cat_log_err_msg: CAT is not enabled on
the socket: No such file or directory
Failed to get l3 cat info
Cache Allocation Technology (CAT): L2
Socket ID : 0
Maximum COS : 3
CBM length : 8
Default CBM : 0xff
Signed-off-by: He Chen <he.chen@xxxxxxxxxxxxxxx>
Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
---
tools/libxc/include/xenctrl.h | 6 +++---
tools/libxc/xc_psr.c | 40 +++++++++++++++++++++++-----------
tools/libxl/libxl.h | 11 ++++++++--
tools/libxl/libxl_psr.c | 8 +++----
tools/libxl/xl_cmdimpl.c | 50 +++++++++++++++++++++++++++++++++++--------
5 files changed, 85 insertions(+), 30 deletions(-)
diff --git a/tools/libxc/include/xenctrl.h b/tools/libxc/include/xenctrl.h
index 2c83544..5b7df22 100644
--- a/tools/libxc/include/xenctrl.h
+++ b/tools/libxc/include/xenctrl.h
@@ -2626,9 +2626,9 @@ int xc_psr_cat_set_domain_data(xc_interface *xch,
uint32_t domid,
int xc_psr_cat_get_domain_data(xc_interface *xch, uint32_t domid,
xc_psr_cat_type type, uint32_t target,
uint64_t *data);
-int xc_psr_cat_get_l3_info(xc_interface *xch, uint32_t socket,
- uint32_t *cos_max, uint32_t *cbm_len,
- bool *cdp_enabled);
+int xc_psr_cat_get_info(xc_interface *xch, uint32_t socket, unsigned int lvl,
+ uint32_t *cos_max, uint32_t *cbm_len,
+ bool *cdp_enabled);
int xc_get_cpu_levelling_caps(xc_interface *xch, uint32_t *caps);
int xc_get_cpu_featureset(xc_interface *xch, uint32_t index,
diff --git a/tools/libxc/xc_psr.c b/tools/libxc/xc_psr.c
index 43b3286..7af17d9 100644
--- a/tools/libxc/xc_psr.c
+++ b/tools/libxc/xc_psr.c
@@ -317,24 +317,40 @@ int xc_psr_cat_get_domain_data(xc_interface *xch,
uint32_t domid,
return rc;
}
-int xc_psr_cat_get_l3_info(xc_interface *xch, uint32_t socket,
- uint32_t *cos_max, uint32_t *cbm_len,
- bool *cdp_enabled)
+int xc_psr_cat_get_info(xc_interface *xch, uint32_t socket, unsigned int lvl,
+ uint32_t *cos_max, uint32_t *cbm_len, bool
*cdp_enabled)
{
- int rc;
+ int rc = -1;
DECLARE_SYSCTL;
sysctl.cmd = XEN_SYSCTL_psr_cat_op;
- sysctl.u.psr_cat_op.cmd = XEN_SYSCTL_PSR_CAT_get_l3_info;
sysctl.u.psr_cat_op.target = socket;
- rc = xc_sysctl(xch, &sysctl);
- if ( !rc )
- {
- *cos_max = sysctl.u.psr_cat_op.u.l3_info.cos_max;
- *cbm_len = sysctl.u.psr_cat_op.u.l3_info.cbm_len;
- *cdp_enabled = sysctl.u.psr_cat_op.u.l3_info.flags &
- XEN_SYSCTL_PSR_CAT_L3_CDP;
+ switch ( lvl ) {
+ case 2:
+ sysctl.u.psr_cat_op.cmd = XEN_SYSCTL_PSR_CAT_get_l2_info;
+ rc = xc_sysctl(xch, &sysctl);
+ if ( !rc )
+ {
+ *cos_max = sysctl.u.psr_cat_op.u.l2_info.cos_max;
+ *cbm_len = sysctl.u.psr_cat_op.u.l2_info.cbm_len;
+ *cdp_enabled = false;
+ }
+ break;
+ case 3:
+ sysctl.u.psr_cat_op.cmd = XEN_SYSCTL_PSR_CAT_get_l3_info;
+ rc = xc_sysctl(xch, &sysctl);
+ if ( !rc )
+ {
+ *cos_max = sysctl.u.psr_cat_op.u.l3_info.cos_max;
+ *cbm_len = sysctl.u.psr_cat_op.u.l3_info.cbm_len;
+ *cdp_enabled = sysctl.u.psr_cat_op.u.l3_info.flags &
+ XEN_SYSCTL_PSR_CAT_L3_CDP;
+ }
+ break;
+ default:
+ errno = EOPNOTSUPP;
+ return rc;
}
return rc;
diff --git a/tools/libxl/libxl.h b/tools/libxl/libxl.h
index acbf476..9233b0f 100644
--- a/tools/libxl/libxl.h
+++ b/tools/libxl/libxl.h
@@ -904,6 +904,13 @@ void libxl_mac_copy(libxl_ctx *ctx, libxl_mac *dst, const
libxl_mac *src);
* If this is defined, the Code and Data Prioritization feature is supported.
*/
#define LIBXL_HAVE_PSR_CDP 1
+
+/*
+ * LIBXL_HAVE_PSR_L2_CAT
+ *
+ * If this is defined, the L2 Cache Allocation Technology feature is supported.
+ */
+#define LIBXL_HAVE_PSR_L2_CAT 1
#endif
/*
@@ -2159,8 +2166,8 @@ int libxl_psr_cat_get_cbm(libxl_ctx *ctx, uint32_t domid,
* On success, the function returns an array of elements in 'info',
* and the length in 'nr'.
*/
-int libxl_psr_cat_get_l3_info(libxl_ctx *ctx, libxl_psr_cat_info **info,
- int *nr);
+int libxl_psr_cat_get_info(libxl_ctx *ctx, libxl_psr_cat_info **info,
+ int *nr, unsigned int lvl);
void libxl_psr_cat_info_list_free(libxl_psr_cat_info *list, int nr);
#endif
diff --git a/tools/libxl/libxl_psr.c b/tools/libxl/libxl_psr.c
index 786183c..f238f71 100644
--- a/tools/libxl/libxl_psr.c
+++ b/tools/libxl/libxl_psr.c
@@ -352,8 +352,8 @@ int libxl_psr_cat_get_cbm(libxl_ctx *ctx, uint32_t domid,
return rc;
}
-int libxl_psr_cat_get_l3_info(libxl_ctx *ctx, libxl_psr_cat_info **info,
- int *nr)
+int libxl_psr_cat_get_info(libxl_ctx *ctx, libxl_psr_cat_info **info,
+ int *nr, unsigned int lvl)
{
GC_INIT(ctx);
int rc;
@@ -380,8 +380,8 @@ int libxl_psr_cat_get_l3_info(libxl_ctx *ctx,
libxl_psr_cat_info **info,
libxl_for_each_set_bit(socketid, socketmap) {
ptr[i].id = socketid;
- if (xc_psr_cat_get_l3_info(ctx->xch, socketid, &ptr[i].cos_max,
- &ptr[i].cbm_len, &ptr[i].cdp_enabled)) {
+ if (xc_psr_cat_get_info(ctx->xch, socketid, lvl, &ptr[i].cos_max,
+ &ptr[i].cbm_len, &ptr[i].cdp_enabled)) {
libxl__psr_cat_log_err_msg(gc, errno);
rc = ERROR_FAIL;
free(ptr);
diff --git a/tools/libxl/xl_cmdimpl.c b/tools/libxl/xl_cmdimpl.c
index 7e8a8ae..c210b05 100644
--- a/tools/libxl/xl_cmdimpl.c
+++ b/tools/libxl/xl_cmdimpl.c
@@ -9331,19 +9331,19 @@ int main_psr_cmt_show(int argc, char **argv)
}
#endif
-#ifdef LIBXL_HAVE_PSR_CAT
-static int psr_cat_hwinfo(void)
+#if defined(LIBXL_HAVE_PSR_CAT) || defined(LIBXL_HAVE_PSR_L2_CAT)
+static int psr_l3_cat_hwinfo(void)
{
- int rc;
- int i, nr;
+ int rc, nr;
+ unsigned int i;
uint32_t l3_cache_size;
libxl_psr_cat_info *info;
- printf("Cache Allocation Technology (CAT):\n");
+ printf("Cache Allocation Technology (CAT): L3\n");
- rc = libxl_psr_cat_get_l3_info(ctx, &info, &nr);
+ rc = libxl_psr_cat_get_info(ctx, &info, &nr, 3);
if (rc) {
- fprintf(stderr, "Failed to get cat info\n");
+ fprintf(stderr, "Failed to get l3 cat info\n");
return rc;
}
@@ -9454,7 +9454,7 @@ static int psr_cat_show(uint32_t domid)
int rc;
libxl_psr_cat_info *info;
- rc = libxl_psr_cat_get_l3_info(ctx, &info, &nr);
+ rc = libxl_psr_cat_get_info(ctx, &info, &nr, 3);
if (rc) {
fprintf(stderr, "Failed to get cat info\n");
return rc;
@@ -9471,6 +9471,34 @@ out:
return rc;
}
+static int psr_l2_cat_hwinfo(void)
+{
+ int rc;
+ unsigned int i;
+ int nr;
+ libxl_psr_cat_info *info;
+
+ printf("Cache Allocation Technology (CAT): L2\n");
+
+ rc = libxl_psr_cat_get_info(ctx, &info, &nr, 2);
+ if (rc) {
+ fprintf(stderr, "Failed to get l2 cat info\n");
+ return rc;
+ }
+
+ for (i = 0; i < nr; i++) {
+ /* There is no CMT on L2 cache so far. */
+ printf("%-16s: %u\n", "Socket ID", info[i].id);
+ printf("%-16s: %u\n", "Maximum COS", info[i].cos_max);
+ printf("%-16s: %u\n", "CBM length", info[i].cbm_len);
+ printf("%-16s: %#llx\n", "Default CBM",
+ (1ull << info[i].cbm_len) - 1);
+ }
+
+ libxl_psr_cat_info_list_free(info, nr);
+ return rc;
+}
+
int main_psr_cat_cbm_set(int argc, char **argv)
{
uint32_t domid;
@@ -9588,7 +9616,11 @@ int main_psr_hwinfo(int argc, char **argv)
ret = psr_cmt_hwinfo();
if (!ret && (all || cat))
- ret = psr_cat_hwinfo();
+ ret = psr_l3_cat_hwinfo();
+
+ /* L2 CAT is independent of CMT and L3 CAT */
+ if (all || cat)
+ ret = psr_l2_cat_hwinfo();
return ret;
}
--
1.9.1
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