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From: Phil Elwell <phil@raspberrypi.com>
To: Greg KH <gregkh@linuxfoundation.org>
Cc: "Jason A. Donenfeld" <Jason@zx2c4.com>,
	Russell King - ARM Linux <linux@armlinux.org.uk>,
	Russell King <rmk+kernel@armlinux.org.uk>,
	linux-arm-kernel <linux-arm-kernel@lists.infradead.org>,
	LKML <linux-kernel@vger.kernel.org>,
	Catalin Marinas <catalin.marinas@arm.com>,
	Stephen Boyd <swboyd@chromium.org>,
	Ard Biesheuvel <ardb@kernel.org>, stable <stable@vger.kernel.org>
Subject: Re: [PATCH v2] ARM: initialize jump labels before setup_machine_fdt()
Date: Tue, 7 Jun 2022 12:04:13 +0100	[thread overview]
Message-ID: <c47c42e3-1d56-5859-a6ad-976a1a3381c6@raspberrypi.com> (raw)
In-Reply-To: <Yp8WBaqr+sLInNnc@kroah.com>

Hi Greg,

On 07/06/2022 10:10, Greg KH wrote:
> On Tue, Jun 07, 2022 at 09:47:30AM +0100, Phil Elwell wrote:
>> Hi Jason,
>>
>> On 07/06/2022 09:30, Jason A. Donenfeld wrote:
>>> Hi Phil,
>>>
>>> Thanks for testing this. Can you let me know if v1 of this works?
>>>
>>> https://lore.kernel.org/lkml/20220602212234.344394-1-Jason@zx2c4.com/
>>>
>>> (I'll also fashion a revert for this part of stable.)
>>>
>>> Jason
>>
>> Thanks for the quick response, but that doesn't work for me either. Let me
>> say again that I'm on a downstream kernel (rpi-5.15.y) so this may not be a
>> universal problem, but merging either of these fixing patches would be fatal
>> for us.
> 
> I have reports of a "clean" 5.15.45 working just fine on a rpi.
> Anything special in your tree that isn't upstream yet that might be
> conflicting with this?  Any chance you can try a kernel.org release
> instead?

A clean 5.15.45 boots cleanly, whereas a downstream kernel shows the static key 
warning (but it does go on to boot). The significant difference is that our 
defconfigs set CONFIG_RANDOM_TRUST_BOOTLOADER=y - defining that on top of 
multi_v7_defconfig demonstrates the issue on a clean 5.15.45. Conversely, not 
setting that option in a downstream kernel build avoids the warning, presumably 
because it takes much longer to accumulate the required entropy.

Phil

  reply	other threads:[~2022-06-07 11:08 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-06-07  8:29 Phil Elwell
2022-06-07  8:30 ` Jason A. Donenfeld
2022-06-07  8:47   ` Phil Elwell
2022-06-07  8:51     ` Jason A. Donenfeld
2022-06-07 10:06       ` Catalin Marinas
2022-06-07 10:11         ` Jason A. Donenfeld
2022-06-08  8:20         ` Jason A. Donenfeld
2022-06-08  9:16           ` Catalin Marinas
2022-06-07  9:10     ` Greg KH
2022-06-07 11:04       ` Phil Elwell [this message]
2022-06-07 11:09         ` Jason A. Donenfeld
2022-06-07  9:14   ` Russell King (Oracle)
2022-06-07  9:16     ` Jason A. Donenfeld
2022-06-07  8:43 ` Jason A. Donenfeld
2022-06-07  9:15   ` Phil Elwell
2022-06-07 15:14     ` Jason A. Donenfeld
2022-06-07 15:35       ` Phil Elwell
2022-06-07 15:44         ` Jason A. Donenfeld
2022-06-07 15:51           ` Phil Elwell
2022-06-07 19:30           ` [PATCH v3] " Jason A. Donenfeld
2022-06-08  8:18             ` Jason A. Donenfeld
  -- strict thread matches above, loose matches on Subject: below --
2022-06-03 12:15 [PATCH v2] " Jason A. Donenfeld

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