diff options
| author | Laszlo Ersek <lersek@redhat.com> | 2016-07-12 16:48:47 +0200 |
|---|---|---|
| committer | Laszlo Ersek <lersek@redhat.com> | 2016-07-13 01:03:57 +0200 |
| commit | 16f26de663967b5a64140b6abba2c145ea50194c (patch) | |
| tree | 4d3222a41acd640fe889ea0490329aa76c605b7c /OvmfPkg | |
| parent | a78b518b6eddef545fa440822bec315b31e4e987 (diff) | |
| download | edk2-platforms-16f26de663967b5a64140b6abba2c145ea50194c.tar.xz | |
OvmfPkg: add a Name GUID to each Firmware Volume
The FDF spec mentions the FvNameGuid statement for [FV.xxxx] sections, but
the detailed description can be found in Volume 3 of the Platform Init
spec (which is at 1.4a currently).
Adding an FvNameGuid statement to [FV.xxx] has the following effects
(implemented by "BaseTools/Source/C/GenFv/GenFvInternalLib.c"):
- The EFI_FIRMWARE_VOLUME_HEADER.ExtHeaderOffset field is set to a nonzero
value, pointing after EFI_FIRMWARE_VOLUME_HEADER itself (although not
directly, see below).
- An EFI_FIRMWARE_VOLUME_EXT_HEADER object is created at the pointed-to
address. This object is not followed by any
EFI_FIRMWARE_VOLUME_EXT_ENTRY (= extension) entries, so it only
specifies the Name GUID for the firmware volume.
The EFI_FIRMWARE_VOLUME_EXT_HEADER for each firmware volume can be found
in the Build directory as a separate file (20 bytes in size):
Build/Ovmf*/*_GCC*/FV/*.ext
- The new data consume 48 bytes in the following volumes: SECFV,
FVMAIN_COMPACT, DXEFV. They comprise:
- 16 padding bytes,
- EFI_FFS_FILE_HEADER2 (8 bytes in total: no Name and ExtendedSize
fields, and Type=EFI_FV_FILETYPE_FFS_PAD),
- EFI_FIRMWARE_VOLUME_EXT_HEADER (20 bytes, see above),
- 4 padding bytes.
(The initial 16 padding bytes and the EFI_FFS_FILE_HEADER2 structure are
the reason why EFI_FIRMWARE_VOLUME_HEADER.ExtHeaderOffset does not point
immediately past EFI_FIRMWARE_VOLUME_HEADER.)
The sizes of the firmware volumes don't change, only their internal
usages grow by 48 bytes. I verified that the statements and calculations
in "OvmfPkg/DecomprScratchEnd.fdf.inc" are unaffected and remain valid.
- The new data consume 0 bytes in PEIFV. This is because PEIFV has enough
internal padding at the moment to accomodate the above structures
without a growth in usage.
In the future, firmware volumes can be identified by Name GUID (Fv(...)
device path nodes), rather than memory location (MemoryMapped(...) device
path nodes). This is supposed to improve stability for persistent device
paths that refer to FFS files; for example, UEFI boot options.
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Ruiyu Ni <ruiyu.ni@intel.com>
Suggested-by: Ruiyu Ni <ruiyu.ni@intel.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Jordan Justen <jordan.l.justen@intel.com>
Diffstat (limited to 'OvmfPkg')
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32.fdf | 4 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgIa32X64.fdf | 4 | ||||
| -rw-r--r-- | OvmfPkg/OvmfPkgX64.fdf | 4 |
3 files changed, 12 insertions, 0 deletions
diff --git a/OvmfPkg/OvmfPkgIa32.fdf b/OvmfPkg/OvmfPkgIa32.fdf index 59a4024ff0..664a035f18 100644 --- a/OvmfPkg/OvmfPkgIa32.fdf +++ b/OvmfPkg/OvmfPkgIa32.fdf @@ -98,6 +98,7 @@ FV = DXEFV ################################################################################
[FV.SECFV]
+FvNameGuid = 763BED0D-DE9F-48F5-81F1-3E90E1B1A015
BlockSize = 0x1000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -128,6 +129,7 @@ INF RuleOverride=RESET_VECTOR OvmfPkg/ResetVector/ResetVector.inf ################################################################################
[FV.PEIFV]
+FvNameGuid = 6938079B-B503-4E3D-9D24-B28337A25806
BlockSize = 0x10000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -166,6 +168,7 @@ INF OvmfPkg/SmmAccess/SmmAccessPei.inf ################################################################################
[FV.DXEFV]
+FvNameGuid = 7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1
BlockSize = 0x10000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -379,6 +382,7 @@ INF MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf ################################################################################
[FV.FVMAIN_COMPACT]
+FvNameGuid = 48DB5E17-707C-472D-91CD-1613E7EF51B0
FvAlignment = 16
ERASE_POLARITY = 1
MEMORY_MAPPED = TRUE
diff --git a/OvmfPkg/OvmfPkgIa32X64.fdf b/OvmfPkg/OvmfPkgIa32X64.fdf index c6167a4176..0f5fe51d7b 100644 --- a/OvmfPkg/OvmfPkgIa32X64.fdf +++ b/OvmfPkg/OvmfPkgIa32X64.fdf @@ -98,6 +98,7 @@ FV = DXEFV ################################################################################
[FV.SECFV]
+FvNameGuid = 763BED0D-DE9F-48F5-81F1-3E90E1B1A015
BlockSize = 0x1000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -128,6 +129,7 @@ INF RuleOverride=RESET_VECTOR OvmfPkg/ResetVector/ResetVector.inf ################################################################################
[FV.PEIFV]
+FvNameGuid = 6938079B-B503-4E3D-9D24-B28337A25806
BlockSize = 0x10000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -166,6 +168,7 @@ INF OvmfPkg/SmmAccess/SmmAccessPei.inf ################################################################################
[FV.DXEFV]
+FvNameGuid = 7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1
BlockSize = 0x10000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -379,6 +382,7 @@ INF MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf ################################################################################
[FV.FVMAIN_COMPACT]
+FvNameGuid = 48DB5E17-707C-472D-91CD-1613E7EF51B0
FvAlignment = 16
ERASE_POLARITY = 1
MEMORY_MAPPED = TRUE
diff --git a/OvmfPkg/OvmfPkgX64.fdf b/OvmfPkg/OvmfPkgX64.fdf index 30b0c2ba3f..6e468a8ab0 100644 --- a/OvmfPkg/OvmfPkgX64.fdf +++ b/OvmfPkg/OvmfPkgX64.fdf @@ -98,6 +98,7 @@ FV = DXEFV ################################################################################
[FV.SECFV]
+FvNameGuid = 763BED0D-DE9F-48F5-81F1-3E90E1B1A015
BlockSize = 0x1000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -128,6 +129,7 @@ INF RuleOverride=RESET_VECTOR OvmfPkg/ResetVector/ResetVector.inf ################################################################################
[FV.PEIFV]
+FvNameGuid = 6938079B-B503-4E3D-9D24-B28337A25806
BlockSize = 0x10000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -166,6 +168,7 @@ INF OvmfPkg/SmmAccess/SmmAccessPei.inf ################################################################################
[FV.DXEFV]
+FvNameGuid = 7CB8BDC9-F8EB-4F34-AAEA-3EE4AF6516A1
BlockSize = 0x10000
FvAlignment = 16
ERASE_POLARITY = 1
@@ -379,6 +382,7 @@ INF MdeModulePkg/Universal/Variable/RuntimeDxe/VariableRuntimeDxe.inf ################################################################################
[FV.FVMAIN_COMPACT]
+FvNameGuid = 48DB5E17-707C-472D-91CD-1613E7EF51B0
FvAlignment = 16
ERASE_POLARITY = 1
MEMORY_MAPPED = TRUE
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