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From: Wesley Zhao <zhaowei1102@thundersoft.com>
To: akpm@linux-foundation.org
Cc: andriy.shevchenko@linux.intel.com, keescook@chromium.org,
	tglx@linutronix.de, kerneldev@karsmulder.nl,
	nivedita@alum.mit.edu, joe@perches.com, gpiccoli@canonical.com,
	aquini@redhat.com, gustavoars@kernel.org,
	zhaowei1102@thundersoft.com, ojeda@kernel.org,
	ndesaulniers@gooogle.com, linux-kernel@vger.kernel.org,
	david@redhat.com, dan.j.williams@intel.com, guohanjun@huawei.com,
	mchehab+huawei@kernel.org
Subject: [PATCH v3 0/2] Make it possible to reserve memory on 64bit platform
Date: Fri, 22 Jan 2021 07:55:35 -0800	[thread overview]
Message-ID: <1611330937-22654-1-git-send-email-zhaowei1102@thundersoft.com> (raw)

I was trying to reserve some memory to save logs incase that Android panic or hang and then
I can read the logs from QNX side from the memory reserved before on the Qualcomm 8155 hypervisor platform,
and I find the "reserve=" parameter only support 32bit,so I made some change and send these patches.

I run the cmdline_kunit.c and got these:
[    1.663048] 1..1
[    1.663107]     # Subtest: cmdline
[    1.663145]     1..3
[    1.663795]     ok 1 - cmdline_test_noint
[    1.664139]     ok 2 - cmdline_test_lead_int
[    1.664553]     ok 3 - cmdline_test_tail_int
[    1.664788] ok 1 - cmdline

Additionaly:
	I test on the qemu with some cmdline like[qemu-system-x86_64 -kernel linux-next/arch/x86_64/boot/bzImage
	-hda ubuntu-system.ext4 -append "root=/dev/sda init=/bin/bash console=ttyS0 reserve=0x180000000,0x123456"
	-nographic] and check the /proc/iomem with 180000000-180123455 : reserved.
	And some other tests with the get_option with the parameter(-12345678) and so on


Wesley Zhao (2):
  lib/cmdline: add new function get_option_ull()
  resource: Make it possible to reserve memory on 64bit platform

 include/linux/kernel.h |  2 ++
 kernel/resource.c      |  6 ++--
 lib/cmdline.c          | 94 ++++++++++++++++++++++++++++++++++++++++++--------
 3 files changed, 85 insertions(+), 17 deletions(-)

-- 
2.7.4


             reply	other threads:[~2021-01-22 15:59 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-22 15:55 Wesley Zhao [this message]
2021-01-22 15:55 ` [PATCH v3 1/2] lib/cmdline: add new function get_option_ull() Wesley Zhao
2021-01-22 16:27   ` Andy Shevchenko
2021-01-22 15:55 ` [PATCH v3 2/2] resource: Make it possible to reserve memory on 64bit platform Wesley Zhao
2021-01-22 16:31   ` Andy Shevchenko
2021-01-22 16:26 ` [PATCH v3 0/2] " Andy Shevchenko

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