linux-kernel - [PATCH v3 0/2] Make it possible to reserve memory on 64bit platform

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Message-Id: <1611330937-22654-1-git-send-email-zhaowei1102@thundersoft.com>
Date:   Fri, 22 Jan 2021 07:55:35 -0800
From:   Wesley Zhao <zhaowei1102@...ndersoft.com>
To:     akpm@...ux-foundation.org
Cc:     andriy.shevchenko@...ux.intel.com, keescook@...omium.org,
        tglx@...utronix.de, kerneldev@...smulder.nl, nivedita@...m.mit.edu,
        joe@...ches.com, gpiccoli@...onical.com, aquini@...hat.com,
        gustavoars@...nel.org, zhaowei1102@...ndersoft.com,
        ojeda@...nel.org, ndesaulniers@...ogle.com,
        linux-kernel@...r.kernel.org, david@...hat.com,
        dan.j.williams@...el.com, guohanjun@...wei.com,
        mchehab+huawei@...nel.org
Subject: [PATCH v3 0/2] Make it possible to reserve memory on 64bit platform

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