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Re: [Qemu-devel] [v5 PATCH] target-mips: implement UserLocal Register
From: |
Aurelien Jarno |
Subject: |
Re: [Qemu-devel] [v5 PATCH] target-mips: implement UserLocal Register |
Date: |
Wed, 18 Jun 2014 20:24:43 +0200 |
User-agent: |
Mutt/1.5.21 (2010-09-15) |
On Wed, Jun 18, 2014 at 05:48:20PM +0200, Petar Jovanovic wrote:
> From: Petar Jovanovic <address@hidden>
>
> From MIPS documentation (Volume III):
>
> UserLocal Register (CP0 Register 4, Select 2)
> Compliance Level: Recommended.
>
> The UserLocal register is a read-write register that is not interpreted by
> the hardware and conditionally readable via the RDHWR instruction.
>
> This register only exists if the Config3-ULRI register field is set.
>
> Privileged software may write this register with arbitrary information and
> make it accessible to unprivileged software via register 29 (ULR) of the
> RDHWR instruction. To do so, bit 29 of the HWREna register must be set to a
> 1 to enable unprivileged access to the register.
>
> Signed-off-by: Petar Jovanovic <address@hidden>
Thanks for this new version, I just applied it.
--
Aurelien Jarno GPG: 4096R/1DDD8C9B
address@hidden http://www.aurel32.net