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....@linux.intel.com>
---
xen/arch/x86/psr.c | 118 +++++++++++++++++++++++++++++++++++++++++++++++++++++
1 file changed, 118 insertions(+)
diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index df83aa1..3cfa77d 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -557,10 +557,128 @@ static bool l3_cdp_get_val(const struct feat_node *feat,
unsigned int cos,
return true;
}
+static unsigned int l3_cdp_get_cos_num(const struct feat_node *feat)
+{
+ return 2;
+}
+
+static int l3_cdp_get_old_val(uint64_t val[],
+ const struct feat_node *feat,
+ unsigned int old_cos)
+{
+ if ( old_cos > feat->info.l3_cdp_info.cos_max )
+ /* Use default value. */
+ old_cos = 0;
+
+ /* Data */
+ val[0] = get_cdp_data(feat, old_cos);
+ /* Code */
+ val[1] = get_cdp_code(feat, old_cos);
+
+ return 0;
+}
+
+static int l3_cdp_set_new_val(uint64_t val[],
+ const struct feat_node *feat,
+ enum cbm_type type,
+ uint64_t m)
+{
+ if ( !psr_check_cbm(feat->info.l3_cdp_info.cbm_len, m) )
+ return -EINVAL;
+
+ if ( type == PSR_CBM_TYPE_L3_DATA )
+ val[0] = m;
+ else
+ val[1] = m;
+
+ return 0;
+}
+
+static int l3_cdp_compare_val(const uint64_t val[],
+ const struct feat_node *feat,
+ unsigned int cos, bool *found)
+{
+ uint64_t l3_def_cbm;
+
+ l3_def_cbm = (1ull << feat->info.l3_cdp_info.cbm_len) - 1;
+
+ /*
+ * 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.l3_cdp_info.cos_max )
+ {
+ if ( val[0] != l3_def_cbm ||
+ val[1] != l3_def_cbm )
+ {
+ *found = false;
+ return -ENOENT;
+ }
+ *found = true;
+ }
+ else
+ *found = (val[0] == get_cdp_data(feat, cos) &&
+ val[1] == get_cdp_code(feat, cos));
+
+ return 0;
+}
+
+static bool l3_cdp_fits_cos_max(const uint64_t val[],
+ const struct feat_node *feat,
+ unsigned int cos)
+{
+ uint64_t l3_def_cbm;
+
+ l3_def_cbm = (1ull << feat->info.l3_cdp_info.cbm_len) - 1;
+
+ if ( cos > feat->info.l3_cdp_info.cos_max &&
+ (val[0] != l3_def_cbm || val[1] != l3_def_cbm) )
+ /*
+ * Exceed cos_max and value to set is not default,
+ * return error.
+ */
+ return false;
+
+ return true;
+}
+
+static int l3_cdp_write_msr(unsigned int cos, const uint64_t val[],
+ struct feat_node *feat)
+{
+ /*
+ * If input cos is more than the cos_max of the feature, we should
+ * not set the value.
+ */
+ if ( cos > feat->info.l3_cdp_info.cos_max )
+ return -EINVAL;
+
+ /* Data */
+ if ( get_cdp_data(feat, cos) != val[0] )
+ {
+ get_cdp_data(feat, cos) = val[0];
+ wrmsrl(MSR_IA32_PSR_L3_MASK_DATA(cos), val[0]);
+ }
+ /* Code */
+ if ( get_cdp_code(feat, cos) != val[1] )
+ {
+ get_cdp_code(feat, cos) = val[1];
+ wrmsrl(MSR_IA32_PSR_L3_MASK_CODE(cos), val[1]);
+ }
+
+ return 0;
+}
+
struct feat_ops l3_cdp_ops = {
.get_cos_max = l3_cdp_get_cos_max,
.get_feat_info = l3_cdp_get_feat_info,
.get_val = l3_cdp_get_val,
+ .get_cos_num = l3_cdp_get_cos_num,
+ .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,
--
1.9.1
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