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....@linux.intel.com>
Reviewed-by: Konrad Rzeszutek Wilk <konrad.w...@oracle.com>
Reviewed-by: Wei Liu <wei.l...@citrix.com>
---
v9:
- replace feature list handling to feature array handling.
(suggested by Roger Pau)
- define 'PSR_INFO_SIZE'.
(suggested by Roger Pau)
- fix coding style issue.
(suggested by Roger Pau and Jan Beulich)
- use 'ARRAY_SIZE'.
(suggested by Roger Pau)
- rename 'l3_cat_get_feat_info' to 'cat_get_feat_info' to make it a common
function for both L3/L2 CAT.
(suggested by Roger Pau)
- move constant to the right of comparison.
(suggested by Wei Liu)
- remove wrong comment.
(suggested by Jan Beulich)
- rename macros used by psr_get_info to make them meaningful.
(suggested by Jan Beulich)
- remove assignment for 'PSR_SOCKET_UNKNOWN'.
(suggested by Jan Beulich)
- retain blank line after 'case XEN_SYSCTL_PSR_CAT_get_l3_info'.
(suggested by Jan Beulich)
- modify patch title to indicate 'L3 CAT'.
(suggested by Jan Beulich)
- move common data check into common function.
(suggested by Jan Beulich)
v6:
- fix coding style issue.
(suggested by Konrad Rzeszutek Wilk)
- define 'PSR_SOCKET_UNKNOWN' in 'psr_feat_type'.
(suggested by Konrad Rzeszutek Wilk)
- change '-ENOTSOCK' to 'ERANGE'.
(suggested by Konrad Rzeszutek Wilk)
- modify position of macros to remove odd spacing in psr.h.
(suggested by Konrad Rzeszutek Wilk)
v5:
- change 'dat[]' to 'data[]'.
(suggested by Jan Beulich)
- modify parameter type to avoid fixed width type when there is no such
intention.
(suggested by Jan Beulich)
- use 'const' when it is possible.
(suggested by Jan Beulich)
- check feature type outside callback function.
(suggested by Jan Beulich)
- modify macros names to add prefix 'PSR_' and change 'CDP_FLAG' to
'PSR_FLAG'.
(suggested by Jan Beulich)
v4:
- create this patch to make codes easier to understand.
(suggested by Jan Beulich)
---
xen/arch/x86/psr.c | 74 +++++++++++++++++++++++++++++++++++++++++++++--
xen/arch/x86/sysctl.c | 14 ++++++---
xen/include/asm-x86/psr.h | 17 +++++++----
3 files changed, 93 insertions(+), 12 deletions(-)
diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index a6a8081..83358e3 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -60,6 +60,7 @@ enum psr_feat_type {
PSR_SOCKET_L3_CDP,
PSR_SOCKET_L2_CAT,
PSR_SOCKET_MAX_FEAT,
+ PSR_SOCKET_UNKNOWN,
};
/* CAT/CDP HW info data structure. */
@@ -92,6 +93,10 @@ 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);
} ops;
/* Encapsulate feature specific HW info here. */
@@ -185,6 +190,23 @@ 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;
+
+ switch ( type )
+ {
+ case PSR_CBM_TYPE_L3:
+ feat_type = PSR_SOCKET_L3_CAT;
+ break;
+ default:
+ feat_type = PSR_SOCKET_UNKNOWN;
+ break;
+ }
+
+ return feat_type;
+}
+
/* CAT common functions implementation. */
static void cat_init_feature(struct cpuid_leaf regs,
struct feat_node *feat,
@@ -240,9 +262,23 @@ static unsigned int cat_get_cos_max(const struct feat_node
*feat)
return feat->info.cat_info.cos_max;
}
+static bool cat_get_feat_info(const struct feat_node *feat,
+ uint32_t data[], unsigned int array_len)
+{
+ if ( array_len != PSR_INFO_CAT_SIZE )
+ return false;
+
+ data[PSR_INFO_IDX_CBM_LEN] = feat->info.cat_info.cbm_len;
+ data[PSR_INFO_IDX_COS_MAX] = feat->info.cat_info.cos_max;
+ data[PSR_INFO_IDX_FLAG] = 0;
+
+ return true;
+}
+
/* L3 CAT ops */
static const struct feat_ops l3_cat_ops = {
.get_cos_max = cat_get_cos_max,
+ .get_feat_info = cat_get_feat_info,
};
static void __init parse_psr_bool(char *s, char *value, char *feature,
@@ -454,10 +490,42 @@ 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);
+
+ if ( !data )
+ return -EINVAL;
+
+ feat_type = psr_cbm_type_to_feat_type(type);
+ feat = info->features[feat_type];
+ if ( !feat )
+ return -ENOENT;
+
+ if ( feat->ops.get_feat_info(feat, data, array_len) )
+ return 0;
+
+ return -EINVAL;
}
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 2f7056e..aab3d2d 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -175,14 +175,20 @@ 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[PSR_INFO_CAT_SIZE];
+
+ ret = psr_get_info(sysctl->u.psr_cat_op.target,
+ PSR_CBM_TYPE_L3, data, ARRAY_SIZE(data));
+
+ sysctl->u.psr_cat_op.u.l3_info.cbm_len =
data[PSR_INFO_IDX_CBM_LEN];
+ sysctl->u.psr_cat_op.u.l3_info.cos_max =
data[PSR_INFO_IDX_COS_MAX];
+ sysctl->u.psr_cat_op.u.l3_info.flags = data[PSR_INFO_IDX_FLAG];
if ( !ret && __copy_field_to_guest(u_sysctl, sysctl, u.psr_cat_op)
)
ret = -EFAULT;
break;
+ }
default:
ret = -EOPNOTSUPP;
diff --git a/xen/include/asm-x86/psr.h b/xen/include/asm-x86/psr.h
index 57f47e9..e27e685 100644
--- a/xen/include/asm-x86/psr.h
+++ b/xen/include/asm-x86/psr.h
@@ -19,20 +19,27 @@
#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
/* 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
+/* Used by psr_get_info() */
+#define PSR_INFO_IDX_CBM_LEN 0
+#define PSR_INFO_IDX_COS_MAX 1
+#define PSR_INFO_IDX_FLAG 2
+#define PSR_INFO_CAT_SIZE 3
+
+
struct psr_cmt_l3 {
unsigned int features;
unsigned int upscaling_factor;
@@ -63,8 +70,8 @@ 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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