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Re: [RFC PATCH] target/arm: add RAZ/WI handling for DBGDTR[TX|RX]


From: Richard Henderson
Subject: Re: [RFC PATCH] target/arm: add RAZ/WI handling for DBGDTR[TX|RX]
Date: Tue, 16 May 2023 13:15:22 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.10.0

On 5/16/23 03:44, Alex Bennée wrote:
The commit b3aa2f2128 (target/arm: provide stubs for more external
debug registers) was added to handle HyperV's unconditional usage of
Debug Communications Channel. It turns out that Linux will similarly
break if you enable CONFIG_HVC_DCC "ARM JTAG DCC console".

Extend the registers we RAZ/WI set to avoid this.

Cc: Anders Roxell<anders.roxell@linaro.org>
Cc: Evgeny Iakovlev<eiakovlev@linux.microsoft.com>
Signed-off-by: Alex Bennée<alex.bennee@linaro.org>
---
  target/arm/debug_helper.c | 11 +++++++++--
  1 file changed, 9 insertions(+), 2 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~



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