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.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> Signed-off-by: He Zhe <zhe...@windriver.com> --- scripts/runqemu | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/scripts/runqemu b/scripts/runqemu index de42d0f323..597e7e9a79 100755 --- a/scripts/runqemu +++ b/scripts/runqemu @@ -668,7 +668,10 @@ 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): -- 2.11.0 -- _______________________________________________ Openembedded-core mailing list Openembedded-core@lists.openembedded.org http://lists.openembedded.org/mailman/listinfo/openembedded-core
