[Patch] FDF Spec: Per PI 1.6 to support FV extended header contain FV used size

[Yonghong Zhu <yonghong.zhu@intel.com>]

Cc: Liming Gao <liming.gao@intel.com>
Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Kevin W Shaw <kevin.w.shaw@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Yonghong Zhu <yonghong.zhu@intel.com>
---
 2_fdf_design_discussion/25_[fv]_sections.md  | 2 +-
 3_edk_ii_fdf_file_format/36_[fv]_sections.md | 2 ++
 README.md                                    | 1 +
 3 files changed, 4 insertions(+), 1 deletion(-)

diff --git a/2_fdf_design_discussion/25_[fv]_sections.md b/2_fdf_design_discussion/25_[fv]_sections.md
index 82755dd..7b50017 100644
--- a/2_fdf_design_discussion/25_[fv]_sections.md
+++ b/2_fdf_design_discussion/25_[fv]_sections.md
@@ -57,11 +57,11 @@ previously defined sections within another FV section. This eliminates the need
 to re-specify components or modules in multiple places. When the `FvNameString`
 entry is present and set to TRUE in an `[FV]` section, the tools will generate
 an `FvNameString` entry in FV EXT header using the `UiFvName`.
 
 This section also specifies how to define content for PI FV Extensions which
-provides a mapping between a GUID and an OEM file type. The size of
+provides a mapping for a GUID, an OEM file type and FV used size. The size of
 `EFI_FIRMWARE_VOLUME_EXT_HEADER` and `EFI_FIRMWARE_VOLUME_EXT_ENTRY` sizes will
 be calculated based on content, while the `EFI_FIRMWARE_VOLUME_EXT_ENTRY` type
 must be defined by the platform integrator based on the PI specification,
 volume 3 The content is limited to the contents of a binary file specified by a
 FILE statement or a data array specified by a `DATA` statement.
diff --git a/3_edk_ii_fdf_file_format/36_[fv]_sections.md b/3_edk_ii_fdf_file_format/36_[fv]_sections.md
index f2d34cf..b4f292a 100644
--- a/3_edk_ii_fdf_file_format/36_[fv]_sections.md
+++ b/3_edk_ii_fdf_file_format/36_[fv]_sections.md
@@ -74,10 +74,11 @@ Conditional statements may be used anywhere within this section.
 <FvStatements>      ::= [<BlockStatements>]
                         [<FvAlignment>]
                         [<FvAttributes>]
                         [<FileSystemGuid>]
                         [<FvNameGuid>]
+                        [<FvUsedSize>]
                         [<FvNameString>]
                         [<PeiAprioriSection>]
                         [<DxeAprioriSection>]
                         <InfStatements>*
                         <FileStatements>*
@@ -108,10 +109,11 @@ Conditional statements may be used anywhere within this section.
                         [<TS> "READ_DISABLED_CAP" <Eq> <TrueFalse> <EOL>]
                         [<TS> "READ_STATUS" <Eq> <TrueFalse> <EOL>]
                         [<TS> "ERASE_POLARITY" <Eq> {"0"} {"1"} <EOL>]
 <FileSystemGuid>    ::= <TS> "FileSystemGuid" <Eq> <NamedGuid> <EOL>
 <FvNameGuid>        ::= <TS> "FvNameGuid" <Eq> <NamedGuid> <EOL>
+<FvUsedSize>        ::= <TS> "FvUsedSizeEnable" <Eq> <TrueFalse> <EOL>
 <FvNameString>      ::= <TS> "FvNameString" <Eq> <TrueFalse> <EOL>
 <PeiAprioriSection> ::= <TS> "APRIORI" <MTS> "PEI" <MTS>
                         "{" <EOL>
                         <MacroDefinition>*
                         <InfStatements>*
diff --git a/README.md b/README.md
index 71c92fc..4e15a73 100644
--- a/README.md
+++ b/README.md
@@ -207,5 +207,6 @@ Copyright (c) 2006-2017, Intel Corporation. All rights reserved.
 |            | [#478](https://bugzilla.tianocore.org/show_bug.cgi?id=478) FDF spec: extend the <FmpFileData> to support <FvStatements> and <FdStatenents>                                 |               |
 |            | [#353](https://bugzilla.tianocore.org/show_bug.cgi?id=353) Build spec: Allow nested includes in DSC and FDF files                                                          |               |
 |            | [#520](https://bugzilla.tianocore.org/show_bug.cgi?id=520) FDF spec: Update Precedence of PCD Values                                                                       |               |
 |            | [#585](https://bugzilla.tianocore.org/show_bug.cgi?id=585) FDF Spec: Update the FDF_SPECIFICATION version to 0x0001001B or 1.27                                            |               |
 |            | Per PI 1.6 to extend FFS alignment to 16M                                                                                                                                  |               |
+|            | Per PI 1.6 to support FV extended header entry contain the used size of FV                                                                                                 |               |
-- 
2.6.1.windows.1