KVM: Don't pre-reserve xarray entries when storing empty/NULL attributesgrafted

Skip the xarray reservation loop when clearing all memory attributes, as
storing NULL only erases the entry and never needs to allocate, so no
reservation (and no cleanup of a failed one) is required in that case.

Suggested-by: Sean Christopherson <seanjc@google.com>
Cc: David Ballesteros <davimaba.v@proton.me>
Signed-off-by: Zeng Chi <zengchi@kylinos.cn>
Link: https://patch.msgid.link/20260921102442.1232375-1-zeng_chi911@163.com
[sean: split to separate patch]
Signed-off-by: Sean Christopherson <seanjc@google.com>

1 files changed, 269 insertions, 0 deletions

diff --git a/include/trace/events/host1x.h b/include/trace/events/host1x.h
new file mode 100644
index 000000000..1b6aeb7b1
--- /dev/null
+++ b/include/trace/events/host1x.h
@@ -0,0 +1,269 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * include/trace/events/host1x.h
+ *
+ * host1x event logging to ftrace.
+ *
+ * Copyright (c) 2010-2013, NVIDIA Corporation.
+ */
+
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM host1x
+
+#if !defined(_TRACE_HOST1X_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_HOST1X_H
+
+#include <linux/ktime.h>
+#include <linux/tracepoint.h>
+
+struct host1x_bo;
+
+DECLARE_EVENT_CLASS(host1x,
+	TP_PROTO(const char *name),
+	TP_ARGS(name),
+	TP_STRUCT__entry(__string(name, name)),
+	TP_fast_assign(
+		__assign_str(name);
+	),
+	TP_printk("name=%s", __get_str(name))
+);
+
+DEFINE_EVENT(host1x, host1x_channel_open,
+	TP_PROTO(const char *name),
+	TP_ARGS(name)
+);
+
+DEFINE_EVENT(host1x, host1x_channel_release,
+	TP_PROTO(const char *name),
+	TP_ARGS(name)
+);
+
+DEFINE_EVENT(host1x, host1x_cdma_begin,
+	TP_PROTO(const char *name),
+	TP_ARGS(name)
+);
+
+DEFINE_EVENT(host1x, host1x_cdma_end,
+	TP_PROTO(const char *name),
+	TP_ARGS(name)
+);
+
+TRACE_EVENT(host1x_cdma_push,
+	TP_PROTO(const char *name, u32 op1, u32 op2),
+
+	TP_ARGS(name, op1, op2),
+
+	TP_STRUCT__entry(
+		__string(name, name)
+		__field(u32, op1)
+		__field(u32, op2)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->op1 = op1;
+		__entry->op2 = op2;
+	),
+
+	TP_printk("name=%s, op1=%08x, op2=%08x",
+		__get_str(name), __entry->op1, __entry->op2)
+);
+
+TRACE_EVENT(host1x_cdma_push_wide,
+	TP_PROTO(const char *name, u32 op1, u32 op2, u32 op3, u32 op4),
+
+	TP_ARGS(name, op1, op2, op3, op4),
+
+	TP_STRUCT__entry(
+		__string(name, name)
+		__field(u32, op1)
+		__field(u32, op2)
+		__field(u32, op3)
+		__field(u32, op4)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->op1 = op1;
+		__entry->op2 = op2;
+		__entry->op3 = op3;
+		__entry->op4 = op4;
+	),
+
+	TP_printk("name=%s, op1=%08x, op2=%08x, op3=%08x op4=%08x",
+		__get_str(name), __entry->op1, __entry->op2, __entry->op3,
+		__entry->op4)
+);
+
+TRACE_EVENT(host1x_cdma_push_gather,
+	TP_PROTO(const char *name, struct host1x_bo *bo,
+			u32 words, u32 offset, void *cmdbuf),
+
+	TP_ARGS(name, bo, words, offset, cmdbuf),
+
+	TP_STRUCT__entry(
+		__string(name, name)
+		__field(struct host1x_bo *, bo)
+		__field(u32, words)
+		__field(u32, offset)
+		__field(bool, cmdbuf)
+		__dynamic_array(u32, cmdbuf, words)
+	),
+
+	TP_fast_assign(
+		if (cmdbuf) {
+			memcpy(__get_dynamic_array(cmdbuf), cmdbuf+offset,
+					words * sizeof(u32));
+		}
+		__entry->cmdbuf = cmdbuf;
+		__assign_str(name);
+		__entry->bo = bo;
+		__entry->words = words;
+		__entry->offset = offset;
+	),
+
+	TP_printk("name=%s, bo=%p, words=%u, offset=%d, contents=[%s]",
+	  __get_str(name), __entry->bo,
+	  __entry->words, __entry->offset,
+	  __print_hex(__get_dynamic_array(cmdbuf),
+		  __entry->cmdbuf ? __entry->words * 4 : 0))
+);
+
+TRACE_EVENT(host1x_channel_submit,
+	TP_PROTO(const char *name, u32 cmdbufs, u32 relocs, u32 syncpt_id,
+		 u32 syncpt_incrs),
+
+	TP_ARGS(name, cmdbufs, relocs, syncpt_id, syncpt_incrs),
+
+	TP_STRUCT__entry(
+		__string(name, name)
+		__field(u32, cmdbufs)
+		__field(u32, relocs)
+		__field(u32, syncpt_id)
+		__field(u32, syncpt_incrs)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->cmdbufs = cmdbufs;
+		__entry->relocs = relocs;
+		__entry->syncpt_id = syncpt_id;
+		__entry->syncpt_incrs = syncpt_incrs;
+	),
+
+	TP_printk("name=%s, cmdbufs=%u, relocs=%u, syncpt_id=%u, "
+		  "syncpt_incrs=%u",
+		  __get_str(name), __entry->cmdbufs, __entry->relocs,
+		  __entry->syncpt_id, __entry->syncpt_incrs)
+);
+
+TRACE_EVENT(host1x_channel_submitted,
+	TP_PROTO(const char *name, u32 syncpt_base, u32 syncpt_max),
+
+	TP_ARGS(name, syncpt_base, syncpt_max),
+
+	TP_STRUCT__entry(
+		__string(name, name)
+		__field(u32, syncpt_base)
+		__field(u32, syncpt_max)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->syncpt_base = syncpt_base;
+		__entry->syncpt_max = syncpt_max;
+	),
+
+	TP_printk("name=%s, syncpt_base=%d, syncpt_max=%d",
+		__get_str(name), __entry->syncpt_base, __entry->syncpt_max)
+);
+
+TRACE_EVENT(host1x_channel_submit_complete,
+	TP_PROTO(const char *name, int count, u32 thresh),
+
+	TP_ARGS(name, count, thresh),
+
+	TP_STRUCT__entry(
+		__string(name, name)
+		__field(int, count)
+		__field(u32, thresh)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->count = count;
+		__entry->thresh = thresh;
+	),
+
+	TP_printk("name=%s, count=%d, thresh=%d",
+		__get_str(name), __entry->count, __entry->thresh)
+);
+
+TRACE_EVENT(host1x_wait_cdma,
+	TP_PROTO(const char *name, u32 eventid),
+
+	TP_ARGS(name, eventid),
+
+	TP_STRUCT__entry(
+		__string(name, name)
+		__field(u32, eventid)
+	),
+
+	TP_fast_assign(
+		__assign_str(name);
+		__entry->eventid = eventid;
+	),
+
+	TP_printk("name=%s, event=%d", __get_str(name), __entry->eventid)
+);
+
+TRACE_EVENT(host1x_syncpt_load_min,
+	TP_PROTO(u32 id, u32 val),
+
+	TP_ARGS(id, val),
+
+	TP_STRUCT__entry(
+		__field(u32, id)
+		__field(u32, val)
+	),
+
+	TP_fast_assign(
+		__entry->id = id;
+		__entry->val = val;
+	),
+
+	TP_printk("id=%d, val=%d", __entry->id, __entry->val)
+);
+
+TRACE_EVENT(host1x_syncpt_wait_check,
+	TP_PROTO(struct host1x_bo *bo, u32 offset, u32 syncpt_id, u32 thresh,
+		 u32 min),
+
+	TP_ARGS(bo, offset, syncpt_id, thresh, min),
+
+	TP_STRUCT__entry(
+		__field(struct host1x_bo *, bo)
+		__field(u32, offset)
+		__field(u32, syncpt_id)
+		__field(u32, thresh)
+		__field(u32, min)
+	),
+
+	TP_fast_assign(
+		__entry->bo = bo;
+		__entry->offset = offset;
+		__entry->syncpt_id = syncpt_id;
+		__entry->thresh = thresh;
+		__entry->min = min;
+	),
+
+	TP_printk("bo=%p, offset=%05x, id=%d, thresh=%d, current=%d",
+		__entry->bo, __entry->offset,
+		__entry->syncpt_id, __entry->thresh,
+		__entry->min)
+);
+
+#endif /*  _TRACE_HOST1X_H */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>