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[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [Xen-devel] [PATCH v6 06/24] x86: refactor psr: implement get hw info flow.
This patch implements get HW info flow including L3 CAT callback
function.
It also changes sysctl interface to make it more general.
With this patch, 'psr-hwinfo' can work for L3 CAT.
Signed-off-by: Yi Sun <yi.y.sun@xxxxxxxxxxxxxxx>
---
v6:
- adjust '{' position for switch.
- define 'PSR_SOCKET_UNKNOWN = 0xFFFF' in 'enum psr_feat_type'.
- use 'ERANGE' when socket id exceeds the range.
- adjust value postion of macros.
---
xen/arch/x86/psr.c | 75 +++++++++++++++++++++++++++++++++++++++++++++--
xen/arch/x86/sysctl.c | 14 +++++----
xen/include/asm-x86/psr.h | 19 +++++++-----
3 files changed, 93 insertions(+), 15 deletions(-)
diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index 89fbaaa..d4a9003 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -84,6 +84,7 @@ enum psr_feat_type {
PSR_SOCKET_L3_CAT = 0,
PSR_SOCKET_L3_CDP,
PSR_SOCKET_L2_CAT,
+ PSR_SOCKET_UNKNOWN = 0xFFFF,
};
/* CAT/CDP HW info data structure. */
@@ -112,6 +113,9 @@ struct feat_node;
struct feat_ops {
/* get_cos_max is used to get feature's cos_max. */
unsigned int (*get_cos_max)(const struct feat_node *feat);
+ /* get_feat_info is used to get feature HW info. */
+ bool (*get_feat_info)(const struct feat_node *feat,
+ uint32_t data[], unsigned int array_len);
};
/*
@@ -179,6 +183,24 @@ static void free_feature(struct psr_socket_info *info)
}
}
+static enum psr_feat_type psr_cbm_type_to_feat_type(enum cbm_type type)
+{
+ enum psr_feat_type feat_type;
+
+ /* Judge if feature is enabled. */
+ switch ( type )
+ {
+ case PSR_CBM_TYPE_L3:
+ feat_type = PSR_SOCKET_L3_CAT;
+ break;
+ default:
+ feat_type = PSR_SOCKET_UNKNOWN;
+ break;
+ }
+
+ return feat_type;
+}
+
/* L3 CAT functions implementation. */
static void l3_cat_init_feature(struct cpuid_leaf regs,
struct feat_node *feat,
@@ -222,8 +244,22 @@ static unsigned int l3_cat_get_cos_max(const struct
feat_node *feat)
return feat->info.l3_cat_info.cos_max;
}
+static bool l3_cat_get_feat_info(const struct feat_node *feat,
+ uint32_t data[], unsigned int array_len)
+{
+ if ( !data || 3 > array_len )
+ return false;
+
+ data[CBM_LEN] = feat->info.l3_cat_info.cbm_len;
+ data[COS_MAX] = feat->info.l3_cat_info.cos_max;
+ data[PSR_FLAG] = 0;
+
+ return true;
+}
+
static const struct feat_ops l3_cat_ops = {
.get_cos_max = l3_cat_get_cos_max,
+ .get_feat_info = l3_cat_get_feat_info,
};
static void __init parse_psr_bool(char *s, char *value, char *feature,
@@ -429,10 +465,43 @@ void psr_ctxt_switch_to(struct domain *d)
}
}
-int psr_get_cat_l3_info(unsigned int socket, uint32_t *cbm_len,
- uint32_t *cos_max, uint32_t *flags)
+static struct psr_socket_info *get_socket_info(unsigned int socket)
{
- return 0;
+ if ( !socket_info )
+ return ERR_PTR(-ENODEV);
+
+ if ( socket >= nr_sockets )
+ return ERR_PTR(-ERANGE);
+
+ if ( !socket_info[socket].feat_mask )
+ return ERR_PTR(-ENOENT);
+
+ return socket_info + socket;
+}
+
+int psr_get_info(unsigned int socket, enum cbm_type type,
+ uint32_t data[], unsigned int array_len)
+{
+ const struct psr_socket_info *info = get_socket_info(socket);
+ const struct feat_node *feat;
+ enum psr_feat_type feat_type;
+
+ if ( IS_ERR(info) )
+ return PTR_ERR(info);
+
+ feat_type = psr_cbm_type_to_feat_type(type);
+ list_for_each_entry(feat, &info->feat_list, list)
+ {
+ if ( feat->feature != feat_type )
+ continue;
+
+ if ( feat->ops.get_feat_info(feat, data, array_len) )
+ return 0;
+ else
+ return -EINVAL;
+ }
+
+ return -ENOENT;
}
int psr_get_l3_cbm(struct domain *d, unsigned int socket,
diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index b8c30d4..e340baa 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -176,15 +176,19 @@ long arch_do_sysctl(
switch ( sysctl->u.psr_cat_op.cmd )
{
case XEN_SYSCTL_PSR_CAT_get_l3_info:
- ret = psr_get_cat_l3_info(sysctl->u.psr_cat_op.target,
- &sysctl->u.psr_cat_op.u.l3_info.cbm_len,
- &sysctl->u.psr_cat_op.u.l3_info.cos_max,
- &sysctl->u.psr_cat_op.u.l3_info.flags);
+ {
+ uint32_t data[3];
+ ret = psr_get_info(sysctl->u.psr_cat_op.target,
+ PSR_CBM_TYPE_L3, data, 3);
+
+ sysctl->u.psr_cat_op.u.l3_info.cbm_len = data[CBM_LEN];
+ sysctl->u.psr_cat_op.u.l3_info.cos_max = data[COS_MAX];
+ sysctl->u.psr_cat_op.u.l3_info.flags = data[PSR_FLAG];
if ( !ret && __copy_field_to_guest(u_sysctl, sysctl, u.psr_cat_op)
)
ret = -EFAULT;
break;
-
+ }
default:
ret = -EOPNOTSUPP;
break;
diff --git a/xen/include/asm-x86/psr.h b/xen/include/asm-x86/psr.h
index 57f47e9..0342a80 100644
--- a/xen/include/asm-x86/psr.h
+++ b/xen/include/asm-x86/psr.h
@@ -19,19 +19,24 @@
#include <xen/types.h>
/* CAT cpuid level */
-#define PSR_CPUID_LEVEL_CAT 0x10
+#define PSR_CPUID_LEVEL_CAT 0x10
/* Resource Type Enumeration */
-#define PSR_RESOURCE_TYPE_L3 0x2
+#define PSR_RESOURCE_TYPE_L3 0x2
/* L3 Monitoring Features */
-#define PSR_CMT_L3_OCCUPANCY 0x1
+#define PSR_CMT_L3_OCCUPANCY 0x1
/* CDP Capability */
-#define PSR_CAT_CDP_CAPABILITY (1u << 2)
+#define PSR_CAT_CDP_CAPABILITY (1u << 2)
/* L3 CDP Enable bit*/
-#define PSR_L3_QOS_CDP_ENABLE_BIT 0x0
+#define PSR_L3_QOS_CDP_ENABLE_BIT 0x0
+
+/* Used by psr_get_info() */
+#define CBM_LEN 0
+#define COS_MAX 1
+#define PSR_FLAG 2
struct psr_cmt_l3 {
unsigned int features;
@@ -63,8 +68,8 @@ int psr_alloc_rmid(struct domain *d);
void psr_free_rmid(struct domain *d);
void psr_ctxt_switch_to(struct domain *d);
-int psr_get_cat_l3_info(unsigned int socket, uint32_t *cbm_len,
- uint32_t *cos_max, uint32_t *flags);
+int psr_get_info(unsigned int socket, enum cbm_type type,
+ uint32_t data[], unsigned int array_len);
int psr_get_l3_cbm(struct domain *d, unsigned int socket,
uint64_t *cbm, enum cbm_type type);
int psr_set_l3_cbm(struct domain *d, unsigned int socket,
--
1.9.1
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