[PATCH v6 5/7] mshv: Update hv_stats_page definitions

[Nuno Das Neves <nunodasneves@linux.microsoft.com>]

hv_stats_page belongs in hvhdk.h, move it there.

It does not require a union to access the data for different counters,
just use a single u64 array for simplicity and to match the Windows
definitions.

While at it, correct the ARM64 value for VpRootDispatchThreadBlocked.

Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
---
 drivers/hv/mshv_root_main.c | 27 ++++++++-------------------
 include/hyperv/hvhdk.h      |  7 +++++++
 2 files changed, 15 insertions(+), 19 deletions(-)

diff --git a/drivers/hv/mshv_root_main.c b/drivers/hv/mshv_root_main.c
index fbfc9e7d9fa4..414d9cee5252 100644
--- a/drivers/hv/mshv_root_main.c
+++ b/drivers/hv/mshv_root_main.c
@@ -39,22 +39,12 @@ MODULE_AUTHOR("Microsoft");
 MODULE_LICENSE("GPL");
 MODULE_DESCRIPTION("Microsoft Hyper-V root partition VMM interface /dev/mshv");
 
-/* TODO move this to another file when debugfs code is added */
-enum hv_stats_vp_counters {			/* HV_THREAD_COUNTER */
-#if defined(CONFIG_X86)
-	VpRootDispatchThreadBlocked			= 202,
+/* HV_THREAD_COUNTER */
+#if defined(CONFIG_X86_64)
+#define HV_VP_COUNTER_ROOT_DISPATCH_THREAD_BLOCKED 202
 #elif defined(CONFIG_ARM64)
-	VpRootDispatchThreadBlocked			= 94,
+#define HV_VP_COUNTER_ROOT_DISPATCH_THREAD_BLOCKED 95
 #endif
-	VpStatsMaxCounter
-};
-
-struct hv_stats_page {
-	union {
-		u64 vp_cntrs[VpStatsMaxCounter];		/* VP counters */
-		u8 data[HV_HYP_PAGE_SIZE];
-	};
-} __packed;
 
 struct mshv_root mshv_root;
 
@@ -485,12 +475,11 @@ static u64 mshv_vp_interrupt_pending(struct mshv_vp *vp)
 static bool mshv_vp_dispatch_thread_blocked(struct mshv_vp *vp)
 {
 	struct hv_stats_page **stats = vp->vp_stats_pages;
-	u64 *self_vp_cntrs = stats[HV_STATS_AREA_SELF]->vp_cntrs;
-	u64 *parent_vp_cntrs = stats[HV_STATS_AREA_PARENT]->vp_cntrs;
+	u64 *self_vp_cntrs = stats[HV_STATS_AREA_SELF]->data;
+	u64 *parent_vp_cntrs = stats[HV_STATS_AREA_PARENT]->data;
 
-	if (self_vp_cntrs[VpRootDispatchThreadBlocked])
-		return self_vp_cntrs[VpRootDispatchThreadBlocked];
-	return parent_vp_cntrs[VpRootDispatchThreadBlocked];
+	return parent_vp_cntrs[HV_VP_COUNTER_ROOT_DISPATCH_THREAD_BLOCKED] ||
+	       self_vp_cntrs[HV_VP_COUNTER_ROOT_DISPATCH_THREAD_BLOCKED];
 }
 
 static int
diff --git a/include/hyperv/hvhdk.h b/include/hyperv/hvhdk.h
index 469186df7826..d87cfdb7d360 100644
--- a/include/hyperv/hvhdk.h
+++ b/include/hyperv/hvhdk.h
@@ -10,6 +10,13 @@
 #include "hvhdk_mini.h"
 #include "hvgdk.h"
 
+/*
+ * Hypervisor statistics page format
+ */
+struct hv_stats_page {
+	u64 data[HV_HYP_PAGE_SIZE / sizeof(u64)];
+} __packed;
+
 /* Bits for dirty mask of hv_vp_register_page */
 #define HV_X64_REGISTER_CLASS_GENERAL	0
 #define HV_X64_REGISTER_CLASS_IP	1
-- 
2.34.1