From: Richard Henderson <richard.henderson@linaro.org>
To: Helge Deller <deller@gmx.de>, qemu-devel@nongnu.org
Cc: Richard Henderson <rth@twiddle.net>
Subject: Re: [PATCH 4/7] hw/hppa: Inform SeaBIOS about fw_cfg port address
Date: Wed, 2 Sep 2020 09:46:24 -0700 [thread overview]
Message-ID: <853e1911-81c3-709b-6a9c-b1f7ffd8f826@linaro.org> (raw)
In-Reply-To: <a56b96b3-9afc-0708-27bf-97d8095bde07@gmx.de>
On 9/2/20 4:24 AM, Helge Deller wrote:
> On 01.09.20 23:39, Richard Henderson wrote:
>> On 9/1/20 11:34 AM, Helge Deller wrote:
>>> -/* QEMU fw_cfg interface port */
>>> -#define QEMU_FW_CFG_IO_BASE (MEMORY_HPA + 0x80)
>>> +#define FW_CFG_IO_BASE 0xfffa0000
>>
>> Why is this value changing?
>
> Devices on hppa occupy at least 4k starting at the HPA,
> so MEMORY_HPA+4k is blocked (by Linux) for the memory module.
> I noticed this when testing the new Linux kernel patch to
> let the fw_cfg entries show up in Linux under /proc:
> https://patchwork.kernel.org/patch/11715133/
> The Linux kernel driver could not allocate the region for fw_cfg.
> This new base address seems to not conflict.
Then that information should be in a patch description, and the change should
be a completely separate patch.
r~
next prev parent reply other threads:[~2020-09-02 16:47 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-01 18:34 [PATCH 0/7] hppa power button support, graphics updates and firmware fixes Helge Deller
2020-09-01 18:34 ` [PATCH 1/7] seabios-hppa: Update SeaBIOS to hppa-qemu-5.2-2 tag Helge Deller
2020-09-01 18:34 ` [PATCH 2/7] hw/hppa: Make number of TLB and BTLB entries configurable Helge Deller
2020-09-01 21:36 ` Richard Henderson
2020-09-02 11:16 ` Helge Deller
2020-09-02 16:52 ` Richard Henderson
2020-09-02 19:36 ` Helge Deller
2020-09-01 18:34 ` [PATCH 3/7] hw/hppa: Store boot device in fw_cfg section Helge Deller
2020-09-01 21:37 ` Richard Henderson
2020-09-01 18:34 ` [PATCH 4/7] hw/hppa: Inform SeaBIOS about fw_cfg port address Helge Deller
2020-09-01 21:39 ` Richard Henderson
2020-09-02 11:24 ` Helge Deller
2020-09-02 16:46 ` Richard Henderson [this message]
2020-09-02 19:37 ` Helge Deller
2020-09-01 18:34 ` [PATCH 5/7] hw/hppa: Add power button emulation Helge Deller
2020-09-01 21:42 ` Richard Henderson
2020-09-01 18:34 ` [PATCH 6/7] hw/display/artist: Fix artist screen resolution Helge Deller
2020-09-01 21:49 ` Richard Henderson
2020-09-02 21:48 ` Helge Deller
2020-09-02 22:09 ` Richard Henderson
2020-09-03 6:07 ` Helge Deller
2020-09-03 6:08 ` Helge Deller
2020-09-03 6:09 ` Helge Deller
2020-09-03 15:09 ` Richard Henderson
2020-09-01 18:34 ` [PATCH 7/7] target/hppa: Fix boot with old Linux installation CDs Helge Deller
2020-09-01 19:37 ` [PATCH 0/7] hppa power button support, graphics updates and firmware fixes Philippe Mathieu-Daudé
2020-09-01 19:49 ` Helge Deller
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