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>

46 files changed, 190 insertions, 0 deletions

diff --git a/tools/bootconfig/samples/bad-array-after-comment.bconf b/tools/bootconfig/samples/bad-array-after-comment.bconf
new file mode 100644
index 000000000..fdb6d4e04
--- /dev/null
+++ b/tools/bootconfig/samples/bad-array-after-comment.bconf
@@ -0,0 +1,4 @@
+# the first array value must be on the same line as the key
+key = # comment
+ value1,
+ value2
diff --git a/tools/bootconfig/samples/bad-array-in-next-line.bconf b/tools/bootconfig/samples/bad-array-in-next-line.bconf
new file mode 100644
index 000000000..95a99a3bd
--- /dev/null
+++ b/tools/bootconfig/samples/bad-array-in-next-line.bconf
@@ -0,0 +1,4 @@
+# the first array value must be on the same line as the key
+key =
+  value1,
+  value2
diff --git a/tools/bootconfig/samples/bad-array-space-comment.bconf b/tools/bootconfig/samples/bad-array-space-comment.bconf
new file mode 100644
index 000000000..fda19e47d
--- /dev/null
+++ b/tools/bootconfig/samples/bad-array-space-comment.bconf
@@ -0,0 +1,5 @@
+key =	# comment
+	"value1",	  # comment1
+	"value2" 	  # comment2
+,
+	"value3"
diff --git a/tools/bootconfig/samples/bad-array.bconf b/tools/bootconfig/samples/bad-array.bconf
new file mode 100644
index 000000000..0174af019
--- /dev/null
+++ b/tools/bootconfig/samples/bad-array.bconf
@@ -0,0 +1,2 @@
+# Array must be comma separated.
+key = "value1" "value2"
diff --git a/tools/bootconfig/samples/bad-dotword.bconf b/tools/bootconfig/samples/bad-dotword.bconf
new file mode 100644
index 000000000..ba5557b2b
--- /dev/null
+++ b/tools/bootconfig/samples/bad-dotword.bconf
@@ -0,0 +1,4 @@
+# do not start keyword with .
+key {
+  .word = 1
+}
diff --git a/tools/bootconfig/samples/bad-empty.bconf b/tools/bootconfig/samples/bad-empty.bconf
new file mode 100644
index 000000000..2ba3f6cc6
--- /dev/null
+++ b/tools/bootconfig/samples/bad-empty.bconf
@@ -0,0 +1 @@
+# Wrong boot config: comment only
diff --git a/tools/bootconfig/samples/bad-keyerror.bconf b/tools/bootconfig/samples/bad-keyerror.bconf
new file mode 100644
index 000000000..b6e247a09
--- /dev/null
+++ b/tools/bootconfig/samples/bad-keyerror.bconf
@@ -0,0 +1,2 @@
+# key word can not contain ","
+key,word
diff --git a/tools/bootconfig/samples/bad-longkey.bconf b/tools/bootconfig/samples/bad-longkey.bconf
new file mode 100644
index 000000000..eb97369f9
--- /dev/null
+++ b/tools/bootconfig/samples/bad-longkey.bconf
@@ -0,0 +1 @@
+key_word_is_too_long01234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345
diff --git a/tools/bootconfig/samples/bad-manywords.bconf b/tools/bootconfig/samples/bad-manywords.bconf
new file mode 100644
index 000000000..8db81967c
--- /dev/null
+++ b/tools/bootconfig/samples/bad-manywords.bconf
@@ -0,0 +1 @@
+key1.is2.too3.long4.5.6.7.8.9.10.11.12.13.14.15.16.17
diff --git a/tools/bootconfig/samples/bad-no-keyword.bconf b/tools/bootconfig/samples/bad-no-keyword.bconf
new file mode 100644
index 000000000..eff268085
--- /dev/null
+++ b/tools/bootconfig/samples/bad-no-keyword.bconf
@@ -0,0 +1,2 @@
+# No keyword
+{}
diff --git a/tools/bootconfig/samples/bad-non-closed-brace.bconf b/tools/bootconfig/samples/bad-non-closed-brace.bconf
new file mode 100644
index 000000000..6ed9f3363
--- /dev/null
+++ b/tools/bootconfig/samples/bad-non-closed-brace.bconf
@@ -0,0 +1,4 @@
+foo {
+ bar {
+   buz
+ }
diff --git a/tools/bootconfig/samples/bad-nonprintable.bconf b/tools/bootconfig/samples/bad-nonprintable.bconf
new file mode 100644
index 000000000..3bb1a2864
--- /dev/null
+++ b/tools/bootconfig/samples/bad-nonprintable.bconf
@@ -0,0 +1,2 @@
+# Non printable
+key = ""
diff --git a/tools/bootconfig/samples/bad-over-max-brace.bconf b/tools/bootconfig/samples/bad-over-max-brace.bconf
new file mode 100644
index 000000000..74b5dc9e2
--- /dev/null
+++ b/tools/bootconfig/samples/bad-over-max-brace.bconf
@@ -0,0 +1,19 @@
+key1 {
+key2 {
+key3 {
+key4 {
+key5 {
+key6 {
+key7 {
+key8 {
+key9 {
+key10 {
+key11 {
+key12 {
+key13 {
+key14 {
+key15 {
+key16 {
+key17 {
+}}}}}}}}}}}}}}}}}
+
diff --git a/tools/bootconfig/samples/bad-samekey.bconf b/tools/bootconfig/samples/bad-samekey.bconf
new file mode 100644
index 000000000..e8d983a45
--- /dev/null
+++ b/tools/bootconfig/samples/bad-samekey.bconf
@@ -0,0 +1,6 @@
+# Same key value is not allowed
+key {
+	foo = value
+	bar = value2
+}
+key.foo = value
diff --git a/tools/bootconfig/samples/bad-spaceword.bconf b/tools/bootconfig/samples/bad-spaceword.bconf
new file mode 100644
index 000000000..90c703d32
--- /dev/null
+++ b/tools/bootconfig/samples/bad-spaceword.bconf
@@ -0,0 +1,2 @@
+# No space between words
+key . word
diff --git a/tools/bootconfig/samples/bad-tree.bconf b/tools/bootconfig/samples/bad-tree.bconf
new file mode 100644
index 000000000..5a6038edc
--- /dev/null
+++ b/tools/bootconfig/samples/bad-tree.bconf
@@ -0,0 +1,5 @@
+# brace is not closing
+tree {
+  node {
+    value = 1
+}
diff --git a/tools/bootconfig/samples/bad-value.bconf b/tools/bootconfig/samples/bad-value.bconf
new file mode 100644
index 000000000..a1217fed8
--- /dev/null
+++ b/tools/bootconfig/samples/bad-value.bconf
@@ -0,0 +1,3 @@
+# Quotes error
+value = "data
+
diff --git a/tools/bootconfig/samples/escaped.bconf b/tools/bootconfig/samples/escaped.bconf
new file mode 100644
index 000000000..9f72043b3
--- /dev/null
+++ b/tools/bootconfig/samples/escaped.bconf
@@ -0,0 +1,3 @@
+key1 = "A\B\C"
+key2 = '\'\''
+key3 = "\\"
diff --git a/tools/bootconfig/samples/exp-good-array-space-comment.bconf b/tools/bootconfig/samples/exp-good-array-space-comment.bconf
new file mode 100644
index 000000000..8d3278fa6
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-array-space-comment.bconf
@@ -0,0 +1 @@
+key = "value1", "value2", "value3";
diff --git a/tools/bootconfig/samples/exp-good-comment-after-value.bconf b/tools/bootconfig/samples/exp-good-comment-after-value.bconf
new file mode 100644
index 000000000..a8e8450db
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-comment-after-value.bconf
@@ -0,0 +1 @@
+key = "value";
diff --git a/tools/bootconfig/samples/exp-good-mixed-append.bconf b/tools/bootconfig/samples/exp-good-mixed-append.bconf
new file mode 100644
index 000000000..c2b407901
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-mixed-append.bconf
@@ -0,0 +1,2 @@
+key = "foo", "bar";
+keyx.subkey = "value";
diff --git a/tools/bootconfig/samples/exp-good-mixed-kv1.bconf b/tools/bootconfig/samples/exp-good-mixed-kv1.bconf
new file mode 100644
index 000000000..8346287d9
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-mixed-kv1.bconf
@@ -0,0 +1,2 @@
+key = "value";
+key.subkey = "another-value";
diff --git a/tools/bootconfig/samples/exp-good-mixed-kv2.bconf b/tools/bootconfig/samples/exp-good-mixed-kv2.bconf
new file mode 100644
index 000000000..40c6232c7
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-mixed-kv2.bconf
@@ -0,0 +1,2 @@
+key = "another-value";
+key.subkey = "value";
diff --git a/tools/bootconfig/samples/exp-good-mixed-kv3.bconf b/tools/bootconfig/samples/exp-good-mixed-kv3.bconf
new file mode 100644
index 000000000..8368a7bef
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-mixed-kv3.bconf
@@ -0,0 +1,5 @@
+key = "value";
+key {
+	subkey1;
+	subkey2 = "foo";
+}
diff --git a/tools/bootconfig/samples/exp-good-mixed-override.bconf b/tools/bootconfig/samples/exp-good-mixed-override.bconf
new file mode 100644
index 000000000..58757712c
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-mixed-override.bconf
@@ -0,0 +1,2 @@
+key = "value2";
+key.foo = "bar";
diff --git a/tools/bootconfig/samples/exp-good-nested-brace.bconf b/tools/bootconfig/samples/exp-good-nested-brace.bconf
new file mode 100644
index 000000000..19e0f51b4
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-nested-brace.bconf
@@ -0,0 +1 @@
+key1.key2.key3.key4.key5.key6.key7.key8.key9.key10.key11.key12.key13.key14.key15.key16;
diff --git a/tools/bootconfig/samples/exp-good-override.bconf b/tools/bootconfig/samples/exp-good-override.bconf
new file mode 100644
index 000000000..00bbd30e9
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-override.bconf
@@ -0,0 +1,4 @@
+key {
+	word = "2", "3";
+	new.word = "new";
+}
diff --git a/tools/bootconfig/samples/exp-good-printables.bconf b/tools/bootconfig/samples/exp-good-printables.bconf
new file mode 100644
index 000000000..5981d304e
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-printables.bconf
@@ -0,0 +1,2 @@
+key = "	
+ !#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~";
diff --git a/tools/bootconfig/samples/exp-good-simple.bconf b/tools/bootconfig/samples/exp-good-simple.bconf
new file mode 100644
index 000000000..d17f39421
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-simple.bconf
@@ -0,0 +1,8 @@
+key {
+	word1 = "1";
+	word2 = "2";
+	word3 = "3";
+	word4 = "4";
+	word5 = "5";
+	word6 = "6";
+}
diff --git a/tools/bootconfig/samples/exp-good-single.bconf b/tools/bootconfig/samples/exp-good-single.bconf
new file mode 100644
index 000000000..01196910d
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-single.bconf
@@ -0,0 +1,3 @@
+key = "1";
+key2 = "2";
+key3 = "alpha", "beta";
diff --git a/tools/bootconfig/samples/exp-good-space-after-value.bconf b/tools/bootconfig/samples/exp-good-space-after-value.bconf
new file mode 100644
index 000000000..a8e8450db
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-space-after-value.bconf
@@ -0,0 +1 @@
+key = "value";
diff --git a/tools/bootconfig/samples/exp-good-tree.bconf b/tools/bootconfig/samples/exp-good-tree.bconf
new file mode 100644
index 000000000..b711d38d8
--- /dev/null
+++ b/tools/bootconfig/samples/exp-good-tree.bconf
@@ -0,0 +1,8 @@
+key {
+	word.tree.value = "0";
+	word2.tree.value = "1", "2";
+}
+other.tree {
+	value = "2";
+	value2 = "3";
+}
diff --git a/tools/bootconfig/samples/good-array-space-comment.bconf b/tools/bootconfig/samples/good-array-space-comment.bconf
new file mode 100644
index 000000000..416fa2ed4
--- /dev/null
+++ b/tools/bootconfig/samples/good-array-space-comment.bconf
@@ -0,0 +1,3 @@
+key = "value1",	  # comment1
+	"value2"	 , # comment2
+	"value3"
diff --git a/tools/bootconfig/samples/good-comment-after-value.bconf b/tools/bootconfig/samples/good-comment-after-value.bconf
new file mode 100644
index 000000000..0d92a853d
--- /dev/null
+++ b/tools/bootconfig/samples/good-comment-after-value.bconf
@@ -0,0 +1 @@
+key = "value"  # comment
diff --git a/tools/bootconfig/samples/good-mixed-append.bconf b/tools/bootconfig/samples/good-mixed-append.bconf
new file mode 100644
index 000000000..b99a089a0
--- /dev/null
+++ b/tools/bootconfig/samples/good-mixed-append.bconf
@@ -0,0 +1,4 @@
+key = foo
+keyx.subkey = value
+key += bar
+
diff --git a/tools/bootconfig/samples/good-mixed-kv1.bconf b/tools/bootconfig/samples/good-mixed-kv1.bconf
new file mode 100644
index 000000000..1761547dd
--- /dev/null
+++ b/tools/bootconfig/samples/good-mixed-kv1.bconf
@@ -0,0 +1,3 @@
+# value -> subkey pattern
+key = value
+key.subkey = another-value
diff --git a/tools/bootconfig/samples/good-mixed-kv2.bconf b/tools/bootconfig/samples/good-mixed-kv2.bconf
new file mode 100644
index 000000000..6b32e0c38
--- /dev/null
+++ b/tools/bootconfig/samples/good-mixed-kv2.bconf
@@ -0,0 +1,3 @@
+# subkey -> value pattern
+key.subkey = value
+key = another-value
diff --git a/tools/bootconfig/samples/good-mixed-kv3.bconf b/tools/bootconfig/samples/good-mixed-kv3.bconf
new file mode 100644
index 000000000..2ce2b0222
--- /dev/null
+++ b/tools/bootconfig/samples/good-mixed-kv3.bconf
@@ -0,0 +1,6 @@
+# mixed key and subkeys with braces
+key = value
+key {
+	subkey1
+	subkey2 = foo
+}
diff --git a/tools/bootconfig/samples/good-mixed-override.bconf b/tools/bootconfig/samples/good-mixed-override.bconf
new file mode 100644
index 000000000..18195b287
--- /dev/null
+++ b/tools/bootconfig/samples/good-mixed-override.bconf
@@ -0,0 +1,4 @@
+key.foo = bar
+key = value
+# mixed key value can be overridden
+key := value2
diff --git a/tools/bootconfig/samples/good-nested-brace.bconf b/tools/bootconfig/samples/good-nested-brace.bconf
new file mode 100644
index 000000000..980d094f2
--- /dev/null
+++ b/tools/bootconfig/samples/good-nested-brace.bconf
@@ -0,0 +1,18 @@
+key1 {
+key2 {
+key3 {
+key4 {
+key5 {
+key6 {
+key7 {
+key8 {
+key9 {
+key10 {
+key11 {
+key12 {
+key13 {
+key14 {
+key15 {
+key16 {
+}}}}}}}}}}}}}}}}
+
diff --git a/tools/bootconfig/samples/good-override.bconf b/tools/bootconfig/samples/good-override.bconf
new file mode 100644
index 000000000..7d31d5f8f
--- /dev/null
+++ b/tools/bootconfig/samples/good-override.bconf
@@ -0,0 +1,6 @@
+# Override the value
+key.word = 1,2,4
+key.word := 2,3
+
+# No pre-defined key
+key.new.word := "new"
diff --git a/tools/bootconfig/samples/good-printables.bconf b/tools/bootconfig/samples/good-printables.bconf
new file mode 100644
index 000000000..ebb985a66
--- /dev/null
+++ b/tools/bootconfig/samples/good-printables.bconf
@@ -0,0 +1,2 @@
+key = "	
+ !#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz{|}~"
diff --git a/tools/bootconfig/samples/good-simple.bconf b/tools/bootconfig/samples/good-simple.bconf
new file mode 100644
index 000000000..37dd6d21c
--- /dev/null
+++ b/tools/bootconfig/samples/good-simple.bconf
@@ -0,0 +1,11 @@
+# A good simple bootconfig
+
+key.word1 = 1
+key.word2=2
+key.word3 = 3;
+
+key {
+word4 = 4 }
+
+key { word5 = 5; word6 = 6 }
+
diff --git a/tools/bootconfig/samples/good-single.bconf b/tools/bootconfig/samples/good-single.bconf
new file mode 100644
index 000000000..98e55ad8b
--- /dev/null
+++ b/tools/bootconfig/samples/good-single.bconf
@@ -0,0 +1,4 @@
+# single key style
+key = 1
+key2 = 2
+key3 = "alpha", "beta"
diff --git a/tools/bootconfig/samples/good-space-after-value.bconf b/tools/bootconfig/samples/good-space-after-value.bconf
new file mode 100644
index 000000000..56c15cbc5
--- /dev/null
+++ b/tools/bootconfig/samples/good-space-after-value.bconf
@@ -0,0 +1 @@
+key = "value"   
diff --git a/tools/bootconfig/samples/good-tree.bconf b/tools/bootconfig/samples/good-tree.bconf
new file mode 100644
index 000000000..f2ddefc8b
--- /dev/null
+++ b/tools/bootconfig/samples/good-tree.bconf
@@ -0,0 +1,12 @@
+key {
+  word {
+    tree {
+      value = "0"}
+  }
+  word2 {
+    tree {
+      value = 1,2 }
+  }
+}
+other.tree {
+  value = 2; value2 = 3;}