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HI Samer,

    Sorry for the slow reply, In EMMC's case, it allowed storage = firmware erase to "1" to be a valid behavior (please reference th= e spec of emmc JESD84-B51/6.6.9), so once verification team use kind of thi= s device, the test case will always failed. To avoid this problem, I think this change is required.

Thanks!!
Arvin

=B1H=A5=F3=AA=CC: Samer E= l-Haj-Mahmoud <Samer.El-Haj-Mahmoud@arm.com>
=B1H=A5=F3=A4=E9=B4=C1: 2020=A6~11=A4=EB12=A4=E9 =A4W=A4=C8 04:56 =A6=AC=A5=F3=AA=CC: devel@edk2.groups.io <devel@edk2.groups.io>= ;; Chen, ArvinX <arvinx.chen@intel.com>
=B0=C6=A5=BB: G Edhaya Chandran <Edhaya.Chandran@arm.com>; Jin= , Eric <eric.jin@intel.com>; Samer El-Haj-Mahmoud <Samer.El-Haj-Ma= hmoud@arm.com>; gaoliming@byosoft.com.cn <gaoliming@byosoft.com.cn>= ;
=A5D=A6=AE: RE: [edk2-devel] [PATCH 2/2] uefi-sct/SctPkg: Correct BB= TestEraseBlocks behavior (EFI_BLOCK_IO_PROTOCOL)
 
Hi Chen,

The UEFI Specification 2.8ErrataB (page 575) states that " It is the i= ntention of the EraseBlocks() operation to be at least as performant as wri= ting zeroes to each of the specified LBA locations while ensuring the equiv= alent 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 C= hen,
> 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=3D3022
>
>
>
> 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 behavi= or.
>
>
>
> 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/EraseBlo= ck
> BBTestFunction.c b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/Protocol/EraseBlock/BlackBoxTest/EraseBlo= ck
> BBTestFunction.c
>
> index cbf43e1d..dbbb70c6 100644
>
> --- a/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/Protocol/EraseBlock/BlackBoxTest/EraseBlo= ck
> BBTestFunction.c
>
> +++ b/uefi-
> sct/SctPkg/TestCase/UEFI/EFI/Protocol/EraseBlock/BlackBoxTest/EraseBlo= ck
> BBTestFunction.c
>
> @@ -71,6 +71,7 @@ BBTestEraseBlocksFunctionTest (
>
>    UINT64       &nbs= p;            &= nbsp;           Index; >
>    UINTN        = ;            &n= bsp;            Inde= x1;
>
>    UINTN        = ;            &n= bsp;            Rema= inder;
>
> +  UINT64         &n= bsp;            = ;          EraseCounter;
>
>
>
>    EFI_ERASE_BLOCK_TOKEN     &= nbsp;           Token; >
>    EFI_BLOCK_IO2_TOKEN     &nb= sp;            = BlockIo2Token;
>
> @@ -223,26 +224,41 @@ BBTestEraseBlocksFunctionTest (
>
>          // Read the data= with 0, the first/last block should not be erased
>
>          ReadStatus =3D B= lockIo->ReadBlocks (BlockIo, MediaId, Lba, BufferSize,
> (VOID*)Buffer2);
>
>          if (ReadStatus = =3D=3D EFI_SUCCESS) {
>
> -          for (Index1 = =3D 0; Index1 < BlockSize; Index1++) {
>
> -            if= (Buffer2[Index1] !=3D 0) {
>
> +          for (Index1 = =3D 0, EraseCounter =3D 0; Index1 < BlockSize; Index1++) {
>
> +            if= (Buffer2[Index1] !=3D 0x00 && Buffer2[Index1] !=3D 0xFF) {
>
>            = ;    IsZero1 =3D FALSE;
>
>            = ;    break;
>
> +            } = else if (Buffer2[Index1] =3D=3D 0x00) {
>
> +           &nb= sp;  EraseCounter++;
>
>            = ;  }
>
>            } >
> +          if (EraseCount= er!=3D0 && EraseCounter!=3DBlockSize) {
>
> +            Is= Zero1 =3D FALSE;
>
> +          }
>
>
>
> -          for (Index1 = =3D BlockSize; Index1 < BufferSize - BlockSize; Index1++) {
>
> -            if= (Buffer2[Index1] !=3D 0) {
>
> +          for (Index1 = =3D BlockSize, EraseCounter =3D 0; Index1 < BufferSize -
> BlockSize; Index1++) {
>
> +            if= (Buffer2[Index1] !=3D 0x00 && Buffer2[Index1] !=3D 0xFF) {
>
>            = ;    IsZero2 =3D FALSE;
>
>            = ;    break;
>
> +            } = else if (Buffer2[Index1] =3D=3D 0x00) {
>
> +           &nb= sp;  EraseCounter++;
>
>            = ;  }
>
>            } >
> +          if (EraseCount= er!=3D0 && EraseCounter!=3D(BufferSize - (BlockSize*2))) {
>
> +            Is= Zero2 =3D FALSE;
>
> +          }
>
>
>
> -          for (Index1 = =3D BufferSize - BlockSize; Index1 < BufferSize; Index1++) {
>
> -            if= (Buffer2[Index1] !=3D 0) {
>
> +          for (Index1 = =3D BufferSize - BlockSize, EraseCounter =3D 0; Index1 <
> BufferSize; Index1++) {
>
> +            if= (Buffer2[Index1] !=3D 0x00 && Buffer2[Index1] !=3D 0xFF) {
>
>            = ;    IsZero3 =3D FALSE;
>
>            = ;    break;
>
> +            } = else if (Buffer2[Index1] =3D=3D 0x00) {
>
> +           &nb= sp;  EraseCounter++;
>
>            = ;  }
>
>            } >
> +          if (EraseCount= er!=3D0 && EraseCounter!=3DBlockSize) {
>
> +            Is= Zero3 =3D FALSE;
>
> +          }
>
>
>
>            if (= (EraseStatus =3D=3D EFI_SUCCESS) && (IsZero1 =3D=3D FALSE) &&am= p; (IsZero2 =3D=3D
> TRUE) && ((IsZero3 =3D=3D FALSE)))
>
>            = ;  AssertionType =3D EFI_TEST_ASSERTION_PASSED;
>
> @@ -492,26 +508,41 @@ BlockIo2:
>
>          // Read the data= with 0, the first/last block should not be erased
>
>          ReadStatus =3D B= lockIo2->ReadBlocksEx (BlockIo2, MediaId, Lba,
> &BlockIo2Token, BufferSize, (VOID*)Buffer2);
>
>          if (ReadStatus = =3D=3D EFI_SUCCESS) {
>
> -          for (Index1 = =3D 0; Index1 < BlockSize; Index1++) {
>
> -            if= (Buffer2[Index1] !=3D 0) {
>
> +          for (Index1 = =3D 0, EraseCounter =3D 0; Index1 < BlockSize; Index1++) {
>
> +            if= (Buffer2[Index1] !=3D 0x00 && Buffer2[Index1] !=3D 0xFF) {
>
>            = ;    IsZero1 =3D FALSE;
>
>            = ;    break;
>
> +            } = else if (Buffer2[Index1] =3D=3D 0x00) {
>
> +           &nb= sp;  EraseCounter++;
>
>            = ;  }
>
>            } >
> +          if (EraseCount= er!=3D0 && EraseCounter!=3DBlockSize) {
>
> +            Is= Zero1 =3D FALSE;
>
> +          }
>
>
>
> -          for (Index1 = =3D BlockSize; Index1 < BufferSize - BlockSize; Index1++) {
>
> -            if= (Buffer2[Index1] !=3D 0) {
>
> +          for (Index1 = =3D BlockSize, EraseCounter =3D 0; Index1 < BufferSize -
> BlockSize; Index1++) {
>
> +            if= (Buffer2[Index1] !=3D 0x00 && Buffer2[Index1] !=3D 0xFF) {
>
>            = ;    IsZero2 =3D FALSE;
>
>            = ;    break;
>
> +            } = else if (Buffer2[Index1] =3D=3D 0x00) {
>
> +           &nb= sp;  EraseCounter++;
>
>            = ;  }
>
>            } >
> +          if (EraseCount= er!=3D0 && EraseCounter!=3D(BufferSize - (BlockSize*2))) {
>
> +            Is= Zero2 =3D FALSE;
>
> +          }
>
>
>
> -          for (Index1 = =3D BufferSize - BlockSize; Index1 < BufferSize; Index1++) {
>
> -            if= (Buffer2[Index1] !=3D 0) {
>
> +          for (Index1 = =3D BufferSize - BlockSize, EraseCounter =3D 0; Index1 <
> BufferSize; Index1++) {
>
> +            if= (Buffer2[Index1] !=3D 0x00 && Buffer2[Index1] !=3D 0xFF) {
>
>            = ;    IsZero3 =3D FALSE;
>
>            = ;    break;
>
> +            } = else if (Buffer2[Index1] =3D=3D 0x00) {
>
> +           &nb= sp;  EraseCounter++;
>
>            = ;  }
>
>            } >
> +          if (EraseCount= er!=3D0 && EraseCounter!=3DBlockSize) {
>
> +            Is= Zero3 =3D FALSE;
>
> +          }
>
>
>
>            if (= (EraseStatus =3D=3D EFI_SUCCESS) && (IsZero1 =3D=3D FALSE) &&am= p; (IsZero2 =3D=3D
> TRUE) && ((IsZero3 =3D=3D FALSE)))
>
>            = ;  AssertionType =3D EFI_TEST_ASSERTION_PASSED;
>
> --
>
> 2.26.2.windows.1
>
>
>
>
>
> -=3D-=3D-=3D-=3D-=3D-=3D
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> mahmoud@arm.com]
> -=3D-=3D-=3D-=3D-=3D-=3D
>

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