OvmfPkg: introduce 4MB flash image (mainly) for Windows HCK

The "Confirm64KilobytesOfUnauthenticatedVariableStorage" test case of the
Secure Boot Logo Test ("Microsoft.UefiSecureBootLogo.Tests") suite in the
Microsoft Hardware Certification Kit expects to be able to populate the
variable store up to roughly 64 KB, with a series of 1 KB sized,
unauthenticated variables. OVMF's current live varstore area is too small
for this: 56 KB.

Introduce the FD_SIZE_4MB build macro (equivalently, FD_SIZE_IN_KB=4096),
which

- enlarges the full flash image to 4MB -- QEMU supports up to 8MB, see
  FLASH_MAP_BASE_MIN in "hw/i386/pc_sysfw.c" --,

- inside that, grows the varstore area / pflash chip to 528 KB, and within
  it, the live area from 56 KB to 256 KB.

Importantly, a firmware binary built with -D FD_SIZE_4MB will *not* be
compatible with a variable store that originates from a variable store
template built *without* -D FD_SIZE_4MB. This is the reason for the large
increase, as every such change breaks compatibility between a new firmware
binary and old varstore files.

Enlarging the varstore does not impact the performance of normal
operations, as we keep the varstore block size 4KB. The performance of
reclaim is affected, but that is expected (since reclaim has to rework the
full live area). And, reclaim occurs proportionally less frequently.

While at it, the FVMAIN_COMPACT volume (with the compressed FFS file in
it) is also enlarged significantly, so that we have plenty of room for
future DXEFV (and perhaps PEIFV) increments -- DXEFV has been growing
steadily, and that increase shows through compression too. Right now the
PEIFV and DXEFV volumes need no resizing.

Here's a summary:

  Description                Compression type                Size [KB]
  -------------------------  -----------------  ----------------------
  Non-volatile data storage  open-coded binary    128 ->   528 ( +400)
                               data
    Variable store                                 56 ->   256 ( +200)
    Event log                                       4 ->     4 (   +0)
    Working block                                   4 ->     4 (   +0)
    Spare area                                     64 ->   264 ( +200)

  FVMAIN_COMPACT             uncompressed        1712 ->  3360 (+1648)
    FV FFS file              LZMA compressed
      PEIFV                  uncompressed         896 ->   896 (   +0)
        individual PEI       uncompressed
          modules
      DXEFV                  uncompressed       10240 -> 10240 (   +0)
        individual DXE       uncompressed
          modules

  SECFV                      uncompressed         208 ->   208 (   +0)
    SEC driver
    reset vector code

For now, the 2MB flash image remains the default.

Cc: Gary Ching-Pang Lin <glin@suse.com>
Cc: Jordan Justen <jordan.l.justen@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>

1 files changed, 28 insertions, 0 deletions

diff --git a/OvmfPkg/OvmfPkg.fdf.inc b/OvmfPkg/OvmfPkg.fdf.inc
index 4e72e35678..b3e0c472a1 100644
--- a/OvmfPkg/OvmfPkg.fdf.inc
+++ b/OvmfPkg/OvmfPkg.fdf.inc
@@ -16,10 +16,21 @@
 ##

 

 DEFINE BLOCK_SIZE        = 0x1000

+

+#

+# A firmware binary built with FD_SIZE_IN_KB=1024, and a firmware binary built

+# with FD_SIZE_IN_KB=2048, use the same variable store layout.

+#

+# Setting FD_SIZE_IN_KB to 4096 results in a different (much larger) variable

+# store structure that is incompatible with both of the above-mentioned

+# firmware binaries.

+#

+!if ($(FD_SIZE_IN_KB) == 1024) || ($(FD_SIZE_IN_KB) == 2048)

 DEFINE VARS_SIZE         = 0x20000

 DEFINE VARS_BLOCKS       = 0x20

 DEFINE VARS_LIVE_SIZE    = 0xE000

 DEFINE VARS_SPARE_SIZE   = 0x10000

+!endif

 

 !if $(FD_SIZE_IN_KB) == 1024

 DEFINE FW_BASE_ADDRESS   = 0xFFF00000

@@ -45,6 +56,23 @@ DEFINE SECFV_OFFSET      = 0x001CC000
 DEFINE SECFV_SIZE        = 0x34000

 !endif

 

+!if $(FD_SIZE_IN_KB) == 4096

+DEFINE VARS_SIZE         = 0x84000

+DEFINE VARS_BLOCKS       = 0x84

+DEFINE VARS_LIVE_SIZE    = 0x40000

+DEFINE VARS_SPARE_SIZE   = 0x42000

+

+DEFINE FW_BASE_ADDRESS   = 0xFFC00000

+DEFINE FW_SIZE           = 0x00400000

+DEFINE FW_BLOCKS         = 0x400

+DEFINE CODE_BASE_ADDRESS = 0xFFC84000

+DEFINE CODE_SIZE         = 0x0037C000

+DEFINE CODE_BLOCKS       = 0x37C

+DEFINE FVMAIN_SIZE       = 0x00348000

+DEFINE SECFV_OFFSET      = 0x003CC000

+DEFINE SECFV_SIZE        = 0x34000

+!endif

+

 SET gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFdBaseAddress     = $(FW_BASE_ADDRESS)

 SET gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFirmwareFdSize    = $(FW_SIZE)

 SET gUefiOvmfPkgTokenSpaceGuid.PcdOvmfFirmwareBlockSize = $(BLOCK_SIZE)