[RFC 09/10] target/i386: Deprecate cpuid-0xb property

[Zhao Liu <zhao1.liu@intel.com>]

"cpuid-0xb" was previously disabled only on PC-Q35-2.6 and
PC-I440FX-2.6 machines, but PC v2.6 machines have been removed.

Considerring it may have external use, so deprecate it before removal.

Signed-off-by: Zhao Liu <zhao1.liu@intel.com>
---
 docs/about/deprecated.rst | 10 ++++++++++
 target/i386/cpu.c         |  2 +-
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index c60924b4f313..741c1a71728b 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -495,6 +495,16 @@ The ``fill-mtrr-mask=true`` fill the bits between 51..number-of-physical-address
 false only on PC-Q35-2.6 and PC-I440FX-2.6 machines, but PC v2.6 machines have
 been removed. Deprecate this property to stop external use.
 
+``cpuid-0xb`` on x86 (since 11.0)
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+The ``cpuid-0xb`` is used to control whether to encode CPUID 0xB leaf or not.
+Only legacy x86 CPUs didn't have 0xB leaf, and the ```level``` property can
+control whether CPUID exposes the 0xB leaf and emulate legacy CPUs. This
+property was previously set to false only on PC-Q35-2.6 and PC-I440FX-2.6
+machines, but PC v2.6 machines have been removed. Deprecate this property to
+stop external use.
+
 ``pmu-num=n`` on RISC-V CPUs (since 8.2)
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
 
diff --git a/target/i386/cpu.c b/target/i386/cpu.c
index 1f0a8cb6cec1..ef1ffc4d3d4f 100644
--- a/target/i386/cpu.c
+++ b/target/i386/cpu.c
@@ -10009,7 +10009,7 @@ static const Property x86_cpu_properties[] = {
     DEFINE_PROP_UINT8("avx10-version", X86CPU, env.avx10_version, 0),
     DEFINE_PROP_UINT64("ucode-rev", X86CPU, ucode_rev, 0),
     DEFINE_PROP_STRING("hv-vendor-id", X86CPU, hyperv_vendor),
-    DEFINE_PROP_BOOL("cpuid-0xb", X86CPU, enable_cpuid_0xb, true),
+    DEFINE_PROP_BOOL_DEPRECATED("cpuid-0xb", X86CPU, enable_cpuid_0xb, true),
     DEFINE_PROP_BOOL("x-vendor-cpuid-only", X86CPU, vendor_cpuid_only, true),
     DEFINE_PROP_BOOL("x-vendor-cpuid-only-v2", X86CPU, vendor_cpuid_only_v2, true),
     DEFINE_PROP_BOOL("x-amd-topoext-features-only", X86CPU, amd_topoext_features_only, true),
-- 
2.34.1