From: Shawn Guo <shawn.guo@linaro.org>
To: Ard Biesheuvel <ardb@kernel.org>
Cc: linux-efi@vger.kernel.org, Jeffrey Hugo <jhugo@codeaurora.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
Rob Clark <robdclark@gmail.com>,
Leif Lindholm <leif@nuviainc.com>,
linux-arm-msm@vger.kernel.org
Subject: Re: [PATCH] efi: stub: override RT_PROP table supported mask based on EFI variable
Date: Sun, 7 Mar 2021 19:02:29 +0800 [thread overview]
Message-ID: <20210307110228.GP17424@dragon> (raw)
In-Reply-To: <20210306113519.294287-1-ardb@kernel.org>
On Sat, Mar 06, 2021 at 12:35:19PM +0100, Ard Biesheuvel wrote:
> Allow EFI systems to override the set of supported runtime services
> declared via the RT_PROP table, by checking for the existence of a
> 'OverrideSupported' EFI variable of the appropriate size under the
> RT_PROP table GUID, and if it does, combine the supported mask using
> logical AND. (This means the override can only remove support, not
> add it back).
>
> Cc: Jeffrey Hugo <jhugo@codeaurora.org>,
> Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
> Cc: Shawn Guo <shawn.guo@linaro.org>
> Cc: Rob Clark <robdclark@gmail.com>
> Cc: Leif Lindholm <leif@nuviainc.com>
> Cc: linux-arm-msm@vger.kernel.org
>
> Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Awesome, Ard! On both Lenovo Yoga C630 and Flex 5G latops:
Tested-by: Shawn Guo <shawn.guo@linaro.org>
With 'OverrideSupported' EFI variable added from UEFI Shell, we can drop
'efi=novamap' kernel cmdline and get around the broken poweroff runtime
services nicely. Thanks!
Shawn
next prev parent reply other threads:[~2021-03-07 11:03 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-06 11:35 [PATCH] efi: stub: override RT_PROP table supported mask based on EFI variable Ard Biesheuvel
2021-03-07 11:02 ` Shawn Guo [this message]
2021-03-08 13:34 ` Ard Biesheuvel
2021-03-09 3:22 ` Shawn Guo
2021-03-09 8:51 ` Ard Biesheuvel
2021-03-09 18:13 ` Rob Clark
2021-03-09 18:47 ` Ard Biesheuvel
2021-03-09 21:19 ` Rob Clark
2021-03-15 3:11 ` Shawn Guo
2021-03-15 13:07 ` Ard Biesheuvel
2021-03-16 7:42 ` Heinrich Schuchardt
2021-03-16 7:52 ` Ard Biesheuvel
2021-03-16 8:04 ` Ilias Apalodimas
2021-03-16 8:14 ` Ard Biesheuvel
2021-03-16 8:27 ` Ilias Apalodimas
2021-03-16 7:52 ` Shawn Guo
2021-03-16 7:57 ` Ard Biesheuvel
2021-03-16 9:06 ` Shawn Guo
2021-03-16 9:33 ` Ard Biesheuvel
2021-03-17 6:36 ` Shawn Guo
2021-03-17 6:58 ` Ard Biesheuvel
2021-03-16 9:33 ` Ilias Apalodimas
2021-03-16 13:25 ` Heinrich Schuchardt
2021-03-16 14:06 ` Ard Biesheuvel
2021-03-16 14:45 ` Heinrich Schuchardt
2021-03-16 14:55 ` Ard Biesheuvel
2021-03-16 16:06 ` Heinrich Schuchardt
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