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:
Hi Ross,
I have sent another fix to linux-yocto to enable CONFIG_HIGHMEM
for qemumips (mti-malta32).
//Hongxu
...
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.nowakow...@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....@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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