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From: Peter Maydell <peter.maydell@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: qemu-devel@nongnu.org, qemu-arm@nongnu.org,
	 Anders Roxell <anders.roxell@linaro.org>,
	Evgeny Iakovlev <eiakovlev@linux.microsoft.com>
Subject: Re: [RFC PATCH] target/arm: add RAZ/WI handling for DBGDTR[TX|RX]
Date: Thu, 18 May 2023 11:10:50 +0100	[thread overview]
Message-ID: <CAFEAcA8fu-+YUeuhVw8mpgYXO=ueXrCecC-LkhFwoubUkMvg4Q@mail.gmail.com> (raw)
In-Reply-To: <20230516104420.407912-1-alex.bennee@linaro.org>

On Tue, 16 May 2023 at 11:44, Alex Bennée <alex.bennee@linaro.org> 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.

Applied to target-arm.next, thanks.

(In theory we could implement the DCC and wire it up to a
chardev, which might be a cute way of getting early debug.)

-- PMM


  parent reply	other threads:[~2023-05-18 10:11 UTC|newest]

Thread overview: 5+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-05-16 10:44 [RFC PATCH] target/arm: add RAZ/WI handling for DBGDTR[TX|RX] Alex Bennée
2023-05-16 20:15 ` Richard Henderson
2023-05-18 10:10 ` Peter Maydell [this message]
2023-05-18 11:09   ` Alex Bennée
2023-05-18 11:43     ` Peter Maydell

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