@@ -530,10 +530,101 @@ static void l3_cdp_get_val(const struct feat_node *feat, unsigned int cos,
*val = get_cdp_code(feat, cos);
}
+static void l3_cdp_get_old_val(uint32_t val[],
+ const struct feat_node *feat,
+ unsigned int old_cos)
+{
+ /* Data */
+ val[0] = get_cdp_data(feat, old_cos);
+ /* Code */
+ val[1] = get_cdp_code(feat, old_cos);
+}
+
+static int l3_cdp_set_new_val(uint32_t val[],
+ const struct feat_node *feat,
+ enum cbm_type type,
+ uint32_t new_val)
+{
+ if ( !psr_check_cbm(feat->info.cat_info.cbm_len, new_val) )
+ return -EINVAL;
+
+ if ( type == PSR_CBM_TYPE_L3_DATA )
+ val[0] = new_val;
+ else
+ val[1] = new_val;
+
+ return 0;
+}
+
+static int l3_cdp_compare_val(const uint32_t val[],
+ const struct feat_node *feat,
+ unsigned int cos)
+{
+ /*
+ * Different features' cos_max are different. If cos id of the feature
+ * being set exceeds other feature's cos_max, the val of other feature
+ * must be default value. HW supports such case.
+ */
+ if ( cos > feat->info.cat_info.cos_max )
+ {
+ if ( val[0] != get_cdp_data(feat, 0) ||
+ val[1] != get_cdp_code(feat, 0) )
+ return -EINVAL;
+
+ /* Find */
+ return 1;
+ }
+
+ if ( val[0] == get_cdp_data(feat, cos) &&
+ val[1] == get_cdp_code(feat, cos) )
+ /* Find */
+ return 1;
+
+ /* Not find */
+ return 0;
+}
+
+static bool l3_cdp_fits_cos_max(const uint32_t val[],
+ const struct feat_node *feat,
+ unsigned int cos)
+{
+ if ( cos > feat->info.cat_info.cos_max &&
+ (val[0] != get_cdp_data(feat, 0) || val[1] != get_cdp_code(feat, 0)) )
+ /*
+ * Exceed cos_max and value to set is not default,
+ * return error.
+ */
+ return false;
+
+ return true;
+}
+
+static void l3_cdp_write_msr(unsigned int cos, uint32_t val,
+ enum cbm_type type, struct feat_node *feat)
+{
+ /* Data */
+ if ( type == PSR_CBM_TYPE_L3_DATA && get_cdp_data(feat, cos) != val )
+ {
+ get_cdp_data(feat, cos) = val;
+ wrmsrl(MSR_IA32_PSR_L3_MASK_DATA(cos), (uint64_t)val);
+ }
+ /* Code */
+ if ( type == PSR_CBM_TYPE_L3_CODE && get_cdp_code(feat, cos) != val )
+ {
+ get_cdp_code(feat, cos) = val;
+ wrmsrl(MSR_IA32_PSR_L3_MASK_CODE(cos), (uint64_t)val);
+ }
+}
+
struct feat_ops l3_cdp_ops = {
.get_cos_max = cat_get_cos_max,
.get_feat_info = l3_cdp_get_feat_info,
.get_val = l3_cdp_get_val,
+ .get_old_val = l3_cdp_get_old_val,
+ .set_new_val = l3_cdp_set_new_val,
+ .compare_val = l3_cdp_compare_val,
+ .fits_cos_max = l3_cdp_fits_cos_max,
+ .write_msr = l3_cdp_write_msr,
};
static void __init parse_psr_bool(char *s, char *value, char *feature,
This patch implements L3 CDP set value related callback functions. With this patch, 'psr-cat-cbm-set' command can work for L3 CDP. Signed-off-by: Yi Sun <yi.y.sun@linux.intel.com> --- v9: - add comment to explain why CDP uses 2 COSs. (suggested by Wei Liu) - use 'cat_default_val'. (suggested by Wei Liu) - remove 'l3_cdp_get_cos_num' because we can directly get cos_num from feat_node now. (suggested by Jan Beulich) - remove cos checking because it has been moved to common function. (suggested by Jan Beulich) - l3_cdp_set_new_val parameter 'm' is changed to 'new_val'. (suggested by Jan Beulich) - directly use get_cdp_data(feat, 0) and get_cdp_code(feat, 0) to get default value. (suggested by Jan Beulich) - modify 'l3_cdp_write_msr' flow to write value into register according to input type. - changes about 'uint64_t' to 'uint32_t'. (suggested by Jan Beulich) v8: - modify 'l3_cdp_write_msr' type to 'void'. v5: - remove type check in callback function. (suggested by Jan Beulich) - modify return value of callback functions because we do not need them to return number of entries the feature uses. In caller, we call 'get_cos_num' to get the number of entries the feature uses. (suggested by Jan Beulich) - remove 'l3_cdp_get_cos_max_from_type'. - rename 'l3_cdp_exceeds_cos_max' to 'l3_cdp_fits_cos_max'. (suggested by Jan Beulich) v4: - create this patch to make codes easier to understand. (suggested by Jan Beulich) --- xen/arch/x86/psr.c | 91 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 91 insertions(+)