Hi Chen,

The UEFI Specification 2.8ErrataB (page 575) states that " It is the intention of the EraseBlocks() operation to be at least as performant as writing zeroes to each of the specified LBA locations while ensuring the equivalent security."

So while not explicitly saying that Erase should "erase to 0", it implies that at least is the intention. Do we know that erasing to "1" is a valid behavior?



> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Chen,
> ArvinX via groups.io
> Sent: Monday, November 2, 2020 5:00 AM
> To: devel@edk2.groups.io
> Cc: G Edhaya Chandran <Edhaya.Chandran@arm.com>; Eric Jin
> <eric.jin@intel.com>
> Subject: [edk2-devel] [PATCH 2/2] uefi-sct/SctPkg: Correct
> BBTestEraseBlocks behavior (EFI_BLOCK_IO_PROTOCOL)
>
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3022
>
>
>
> The storage device erase behavior may have two possibilities:
>
>  1.Write all data into "0"
>
>  2.Write all data into "1"
>
> but now tool behavior can only check case 1 (Write all data into "0"),
>
> so we need add the other case into SCT tool to correct the test behavior.
>
>
>
> Cc: G Edhaya Chandran <Edhaya.Chandran@arm.com>
>
> Cc: Eric Jin <eric.jin@intel.com>
>
> Signed-off-by: ArvinX Chen <arvinx.chen@intel.com>
>
> ---
>
>  .../BlackBoxTest/EraseBlockBBTestFunction.c   | 55 +++++++++++++++----
>
>  1 file changed, 43 insertions(+), 12 deletions(-)
>
>
>
> diff --git a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/Protocol/EraseBlock/BlackBoxTest/EraseBlock
> BBTestFunction.c b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/Protocol/EraseBlock/BlackBoxTest/EraseBlock
> BBTestFunction.c
>
> index cbf43e1d..dbbb70c6 100644
>
> --- a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/Protocol/EraseBlock/BlackBoxTest/EraseBlock
> BBTestFunction.c
>
> +++ b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/Protocol/EraseBlock/BlackBoxTest/EraseBlock
> BBTestFunction.c
>
> @@ -71,6 +71,7 @@ BBTestEraseBlocksFunctionTest (
>
>    UINT64                                Index;
>
>    UINTN                                 Index1;
>
>    UINTN                                 Remainder;
>
> +  UINT64                                EraseCounter;
>
>
>
>    EFI_ERASE_BLOCK_TOKEN                 Token;
>
>    EFI_BLOCK_IO2_TOKEN                   BlockIo2Token;
>
> @@ -223,26 +224,41 @@ BBTestEraseBlocksFunctionTest (
>
>          // Read the data with 0, the first/last block should not be erased
>
>          ReadStatus = BlockIo->ReadBlocks (BlockIo, MediaId, Lba, BufferSize,
> (VOID*)Buffer2);
>
>          if (ReadStatus == EFI_SUCCESS) {
>
> -          for (Index1 = 0; Index1 < BlockSize; Index1++) {
>
> -            if (Buffer2[Index1] != 0) {
>
> +          for (Index1 = 0, EraseCounter = 0; Index1 < BlockSize; Index1++) {
>
> +            if (Buffer2[Index1] != 0x00 && Buffer2[Index1] != 0xFF) {
>
>                IsZero1 = FALSE;
>
>                break;
>
> +            } else if (Buffer2[Index1] == 0x00) {
>
> +              EraseCounter++;
>
>              }
>
>            }
>
> +          if (EraseCounter!=0 && EraseCounter!=BlockSize) {
>
> +            IsZero1 = FALSE;
>
> +          }
>
>
>
> -          for (Index1 = BlockSize; Index1 < BufferSize - BlockSize; Index1++) {
>
> -            if (Buffer2[Index1] != 0) {
>
> +          for (Index1 = BlockSize, EraseCounter = 0; Index1 < BufferSize -
> BlockSize; Index1++) {
>
> +            if (Buffer2[Index1] != 0x00 && Buffer2[Index1] != 0xFF) {
>
>                IsZero2 = FALSE;
>
>                break;
>
> +            } else if (Buffer2[Index1] == 0x00) {
>
> +              EraseCounter++;
>
>              }
>
>            }
>
> +          if (EraseCounter!=0 && EraseCounter!=(BufferSize - (BlockSize*2))) {
>
> +            IsZero2 = FALSE;
>
> +          }
>
>
>
> -          for (Index1 = BufferSize - BlockSize; Index1 < BufferSize; Index1++) {
>
> -            if (Buffer2[Index1] != 0) {
>
> +          for (Index1 = BufferSize - BlockSize, EraseCounter = 0; Index1 <
> BufferSize; Index1++) {
>
> +            if (Buffer2[Index1] != 0x00 && Buffer2[Index1] != 0xFF) {
>
>                IsZero3 = FALSE;
>
>                break;
>
> +            } else if (Buffer2[Index1] == 0x00) {
>
> +              EraseCounter++;
>
>              }
>
>            }
>
> +          if (EraseCounter!=0 && EraseCounter!=BlockSize) {
>
> +            IsZero3 = FALSE;
>
> +          }
>
>
>
>            if ((EraseStatus == EFI_SUCCESS) && (IsZero1 == FALSE) && (IsZero2 ==
> TRUE) && ((IsZero3 == FALSE)))
>
>              AssertionType = EFI_TEST_ASSERTION_PASSED;
>
> @@ -492,26 +508,41 @@ BlockIo2:
>
>          // Read the data with 0, the first/last block should not be erased
>
>          ReadStatus = BlockIo2->ReadBlocksEx (BlockIo2, MediaId, Lba,
> &BlockIo2Token, BufferSize, (VOID*)Buffer2);
>
>          if (ReadStatus == EFI_SUCCESS) {
>
> -          for (Index1 = 0; Index1 < BlockSize; Index1++) {
>
> -            if (Buffer2[Index1] != 0) {
>
> +          for (Index1 = 0, EraseCounter = 0; Index1 < BlockSize; Index1++) {
>
> +            if (Buffer2[Index1] != 0x00 && Buffer2[Index1] != 0xFF) {
>
>                IsZero1 = FALSE;
>
>                break;
>
> +            } else if (Buffer2[Index1] == 0x00) {
>
> +              EraseCounter++;
>
>              }
>
>            }
>
> +          if (EraseCounter!=0 && EraseCounter!=BlockSize) {
>
> +            IsZero1 = FALSE;
>
> +          }
>
>
>
> -          for (Index1 = BlockSize; Index1 < BufferSize - BlockSize; Index1++) {
>
> -            if (Buffer2[Index1] != 0) {
>
> +          for (Index1 = BlockSize, EraseCounter = 0; Index1 < BufferSize -
> BlockSize; Index1++) {
>
> +            if (Buffer2[Index1] != 0x00 && Buffer2[Index1] != 0xFF) {
>
>                IsZero2 = FALSE;
>
>                break;
>
> +            } else if (Buffer2[Index1] == 0x00) {
>
> +              EraseCounter++;
>
>              }
>
>            }
>
> +          if (EraseCounter!=0 && EraseCounter!=(BufferSize - (BlockSize*2))) {
>
> +            IsZero2 = FALSE;
>
> +          }
>
>
>
> -          for (Index1 = BufferSize - BlockSize; Index1 < BufferSize; Index1++) {
>
> -            if (Buffer2[Index1] != 0) {
>
> +          for (Index1 = BufferSize - BlockSize, EraseCounter = 0; Index1 <
> BufferSize; Index1++) {
>
> +            if (Buffer2[Index1] != 0x00 && Buffer2[Index1] != 0xFF) {
>
>                IsZero3 = FALSE;
>
>                break;
>
> +            } else if (Buffer2[Index1] == 0x00) {
>
> +              EraseCounter++;
>
>              }
>
>            }
>
> +          if (EraseCounter!=0 && EraseCounter!=BlockSize) {
>
> +            IsZero3 = FALSE;
>
> +          }
>
>
>
>            if ((EraseStatus == EFI_SUCCESS) && (IsZero1 == FALSE) && (IsZero2 ==
> TRUE) && ((IsZero3 == FALSE)))
>
>              AssertionType = EFI_TEST_ASSERTION_PASSED;
>
> --
>
> 2.26.2.windows.1
>
>
>
>
>
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