This patch implements get HW info flow for MBA including its callback
function and sysctl interface.
Signed-off-by: Yi Sun
---
v2:
- use 'XEN_SYSCTL_PSR_MBA_LINEAR' to set MBA feature HW info.
(suggested by Chao Peng)
v1:
- sort 'PSR_INFO_IDX_' macros as feature.
(suggested by Chao Peng)
- rename 'PSR_INFO_IDX_MBA_LINEAR' to 'PSR_INFO_IDX_MBA_FLAG'.
- rename 'linear' in 'struct mba_info' to 'flags' for future extension.
(suggested by Chao Peng)
---
xen/arch/x86/psr.c | 17 -
xen/arch/x86/sysctl.c | 19 +++
xen/include/asm-x86/psr.h | 2 ++
xen/include/public/sysctl.h | 8
4 files changed, 45 insertions(+), 1 deletion(-)
diff --git a/xen/arch/x86/psr.c b/xen/arch/x86/psr.c
index f5e99ce..4a0c982 100644
--- a/xen/arch/x86/psr.c
+++ b/xen/arch/x86/psr.c
@@ -264,6 +264,10 @@ static enum psr_feat_type psr_val_type_to_feat_type(enum
psr_val_type type)
feat_type = FEAT_TYPE_L2_CAT;
break;
+case PSR_VAL_TYPE_MBA:
+feat_type = FEAT_TYPE_MBA;
+break;
+
default:
ASSERT_UNREACHABLE();
}
@@ -493,7 +497,18 @@ static const struct feat_props l2_cat_props = {
static bool mba_get_feat_info(const struct feat_node *feat,
uint32_t data[], unsigned int array_len)
{
-return false;
+if ( array_len != PSR_INFO_ARRAY_SIZE )
+return false;
+
+data[PSR_INFO_IDX_COS_MAX] = feat->cos_max;
+data[PSR_INFO_IDX_MBA_THRTL_MAX] = feat->mba_info.thrtl_max;
+
+if ( feat->mba_info.linear )
+data[PSR_INFO_IDX_MBA_FLAG] |= XEN_SYSCTL_PSR_MBA_LINEAR;
+else
+data[PSR_INFO_IDX_MBA_FLAG] &= ~XEN_SYSCTL_PSR_MBA_LINEAR;
+
+return true;
}
static void mba_write_msr(unsigned int cos, uint32_t val,
diff --git a/xen/arch/x86/sysctl.c b/xen/arch/x86/sysctl.c
index df54d38..cbab85a 100644
--- a/xen/arch/x86/sysctl.c
+++ b/xen/arch/x86/sysctl.c
@@ -214,6 +214,25 @@ long arch_do_sysctl(
break;
}
+case XEN_SYSCTL_PSR_MBA_get_info:
+{
+ret = psr_get_info(sysctl->u.psr_alloc_op.target,
+ PSR_VAL_TYPE_MBA, data, ARRAY_SIZE(data));
+if ( ret )
+break;
+
+sysctl->u.psr_alloc_op.u.mba_info.cos_max =
+ data[PSR_INFO_IDX_COS_MAX];
+sysctl->u.psr_alloc_op.u.mba_info.thrtl_max =
+ data[PSR_INFO_IDX_MBA_THRTL_MAX];
+sysctl->u.psr_alloc_op.u.mba_info.flags =
+ data[PSR_INFO_IDX_MBA_FLAG];
+
+if ( !ret && __copy_field_to_guest(u_sysctl, sysctl,
u.psr_alloc_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 10043ac..a7fb625 100644
--- a/xen/include/asm-x86/psr.h
+++ b/xen/include/asm-x86/psr.h
@@ -39,6 +39,8 @@
#define PSR_INFO_IDX_COS_MAX0
#define PSR_INFO_IDX_CAT_CBM_LEN1
#define PSR_INFO_IDX_CAT_FLAG 2
+#define PSR_INFO_IDX_MBA_THRTL_MAX 1
+#define PSR_INFO_IDX_MBA_FLAG 2
#define PSR_INFO_ARRAY_SIZE 3
struct psr_cmt_l3 {
diff --git a/xen/include/public/sysctl.h b/xen/include/public/sysctl.h
index fcebab1..169e7e6 100644
--- a/xen/include/public/sysctl.h
+++ b/xen/include/public/sysctl.h
@@ -745,6 +745,7 @@ DEFINE_XEN_GUEST_HANDLE(xen_sysctl_pcitopoinfo_t);
#define XEN_SYSCTL_PSR_CAT_get_l3_info 0
#define XEN_SYSCTL_PSR_CAT_get_l2_info 1
+#define XEN_SYSCTL_PSR_MBA_get_info 2
struct xen_sysctl_psr_alloc_op {
uint32_t cmd; /* IN: XEN_SYSCTL_PSR_CAT_* */
uint32_t target;/* IN */
@@ -755,6 +756,13 @@ struct xen_sysctl_psr_alloc_op {
#define XEN_SYSCTL_PSR_CAT_L3_CDP (1u << 0)
uint32_t flags; /* OUT: CAT flags */
} cat_info;
+
+struct {
+uint32_t thrtl_max; /* OUT: Maximum throttle */
+uint32_t cos_max; /* OUT: Maximum COS */
+#define XEN_SYSCTL_PSR_MBA_LINEAR (1u << 0)
+uint32_t flags; /* OUT: MBA flags */
+} mba_info;
} u;
};
typedef struct xen_sysctl_psr_alloc_op xen_sysctl_psr_alloc_op_t;
--
1.9.1
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