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List:       openembedded-core
Subject:    Re: [OE-core] [PATCH 1/2] scripts/runqemu: qemumips support up to 2GiB RAM
From:       Hongxu Jia <hongxu.jia () windriver ! com>
Date:       2018-01-31 9:16:39
Message-ID: 96f645e6-47cf-ef37-8071-fd490017ba4e () windriver ! com
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On 2017年12月20日 09:53, Hongxu Jia wrote:
> Ping Ross
> 

Ping

//Hongxu

> //Hongxu
> 
> On 2017年12月06日 10:46, Hongxu Jia wrote:
> > OE uses qemumips to simulate a Malta board by default.
> > 
> > As upstream qemu introduced:
> > https://git.qemu.org/?p=qemu.git;a=commit;h=94c2b6aff43cdfcfdfb552773a6b6b973a72ef0b \
> >  
> > 
> > The Malta board can support up to 2GiB of RAM which should
> > be able to boot a Linux kernel built with CONFIG_HIGHMEM
> > enabled and passing "-m 2048" to QEMU and appending the
> > following kernel parameters:
> > ...
> > mem=256M@0x0 mem=256M@0x90000000 mem=1536M@0x20000000
> > ...
> > 
> > But the following commit in kernel broke above mem=X@Y setting
> > which added the memory as reserved memory area.
> > https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=73fbc1eba7ffa3bf0ad12486232a8a1edb4e4411 \
> >  
> > ...
> > commit 73fbc1eba7ffa3bf0ad12486232a8a1edb4e4411
> > Author: Marcin Nowakowski <marcin.nowakowski@imgtec.com>
> > Date:   Wed Nov 23 14:43:49 2016 +0100
> > 
> > MIPS: fix mem=X@Y commandline processing
> > ...
> > 
> > So remove `mem=*' to disable user-defined physical RAM map
> > which let kernel itself caculates memory ranges.
> > 
> > Signed-off-by: Hongxu Jia <hongxu.jia@windriver.com>
> > ---
> > scripts/runqemu | 5 ++++-
> > 1 file changed, 4 insertions(+), 1 deletion(-)
> > 
> > diff --git a/scripts/runqemu b/scripts/runqemu
> > index f2b4b3c..0ae2f85 100755
> > --- a/scripts/runqemu
> > +++ b/scripts/runqemu
> > @@ -658,7 +658,10 @@ class BaseConfig(object):
> > logger.info('QB_MEM is not set, use 512M by default')
> > self.set('QB_MEM', '-m 512')
> > -        self.kernel_cmdline_script += ' mem=%s' % 
> > self.get('QB_MEM').replace('-m','').strip() + 'M'
> > +        mach = self.get('MACHINE')
> > +        if mach != 'qemumips':
> > +            self.kernel_cmdline_script += ' mem=%s' % 
> > self.get('QB_MEM').replace('-m','').strip() + 'M'
> > +
> > self.qemu_opt_script += ' %s' % self.get('QB_MEM')
> > def check_tcpserial(self):
> 
> 

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