This patch implements get HW info flow for CDP including L3 CDP callback
function.
It also changes sysctl function to make it work for CDP.
With this patch, 'psr-hwinfo' can work for L3 CDP.
Signed-off-by: Yi Sun <yi.y....@linux.intel.com>
---
xen/arch/x86/psr.c | 16 ++++++++++++++++
xen/arch/x86/sysctl.c | 24 +++++++++++++++++++++---
2 files changed, 37 insertions(+), 3 deletions(-)
diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index 09da12c..99add7a 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -548,9 +548,25 @@ static unsigned int l3_cdp_get_max_cos_max(const struct
feat_node *feat)
return feat->info.l3_cdp_info.cos_max;
}
+static bool l3_cdp_get_feat_info(const struct feat_node *feat,
+ enum cbm_type type,
+ uint32_t dat[], uint32_t array_len)
+{
+ if ( !dat || 3 > array_len ||
+ ( type != PSR_CBM_TYPE_L3_DATA && type != PSR_CBM_TYPE_L3_CODE) )
+ return false;
+
+ dat[CBM_LEN] = feat->info.l3_cdp_info.cbm_len;
+ dat[COS_MAX] = feat->info.l3_cdp_info.cos_max;
+ dat[CDP_FLAG] |= XEN_SYSCTL_PSR_CAT_L3_CDP;
+
+ return true;
+}
+
struct feat_ops l3_cdp_ops = {
.init_feature = l3_cdp_init_feature,
.get_max_cos_max = l3_cdp_get_max_cos_max,
+ .get_feat_info = l3_cdp_get_feat_info,
};
static void __init parse_psr_bool(char *s, char *value, char *feature,
diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index 168ed45..846eeaf 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -181,9 +181,27 @@ long arch_do_sysctl(
ret = psr_get_info(sysctl->u.psr_cat_op.target,
PSR_CBM_TYPE_L3, dat, 3);
- sysctl->u.psr_cat_op.u.l3_info.cbm_len = dat[CBM_LEN];
- sysctl->u.psr_cat_op.u.l3_info.cos_max = dat[COS_MAX];
- sysctl->u.psr_cat_op.u.l3_info.flags = dat[CDP_FLAG];
+ if ( !ret )
+ {
+ sysctl->u.psr_cat_op.u.l3_info.cbm_len = dat[CBM_LEN];
+ sysctl->u.psr_cat_op.u.l3_info.cos_max = dat[COS_MAX];
+ sysctl->u.psr_cat_op.u.l3_info.flags = dat[CDP_FLAG];
+ } else {
+ /*
+ * Check if CDP is enabled.
+ *
+ * Per spec, L3 CAT and CDP cannot co-exist. So, we need
replace
+ * output values to CDP's if it is enabled.
+ */
+ ret = psr_get_info(sysctl->u.psr_cat_op.target,
+ PSR_CBM_TYPE_L3_CODE, dat, 3);
+ if ( !ret )
+ {
+ sysctl->u.psr_cat_op.u.l3_info.cbm_len = dat[CBM_LEN];
+ sysctl->u.psr_cat_op.u.l3_info.cos_max = dat[COS_MAX];
+ sysctl->u.psr_cat_op.u.l3_info.flags = dat[CDP_FLAG];
+ }
+ }
if ( !ret && __copy_field_to_guest(u_sysctl, sysctl, u.psr_cat_op)
)
ret = -EFAULT;
--
1.9.1
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