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[Qemu-devel] [Bug 1806824] Re: SIE-200 (TrustZone) MPC: BLK_MAX returns

From: Alex Bennée
Subject: [Qemu-devel] [Bug 1806824] Re: SIE-200 (TrustZone) MPC: BLK_MAX returns an incorrect value
Date: Wed, 05 Dec 2018 11:05:02 -0000

As per https://www.qemu.org/contribute/report-a-bug/ could you please

  - the command line you are using
  - details about the guest you are running (or test case)

** Tags added: arm

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  SIE-200 (TrustZone) MPC: BLK_MAX returns an incorrect value

Status in QEMU:

Bug description:
  $ qemu-system-arm --version
  QEMU emulator version 3.0.92 (v3.1.0-rc2-31-gd522fba244)

  Arm SIE-200 Technical Reference Manual describes that BLK_MAX
  indicates the maximum value of "block based index register" (BLK_IDX).
  For example, the value 1 would indicate that BLK_IDX can be 0 or 1.
  According to my experiments, the AN505 FPGA image apparently follows
  this behavior.

  In the current implementation of QEMU, it appears to indicate the
  number of possible values for BLK_IDX, i.e., one plus the value it's
  supposed to return.

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