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From: Scott Wood <oss@buserror.net>
To: Jason Yan <yanaijie@huawei.com>,
	mpe@ellerman.id.au,  linuxppc-dev@lists.ozlabs.org,
	diana.craciun@nxp.com, christophe.leroy@c-s.fr,
	 benh@kernel.crashing.org, paulus@samba.org, npiggin@gmail.com,
	 keescook@chromium.org, kernel-hardening@lists.openwall.com
Cc: wangkefeng.wang@huawei.com, linux-kernel@vger.kernel.org,
	 jingxiangfeng@huawei.com, zhaohongjiang@huawei.com,
	thunder.leizhen@huawei.com,  yebin10@huawei.com
Subject: Re: [PATCH v7 00/12] implement KASLR for powerpc/fsl_booke/32
Date: Wed, 09 Oct 2019 13:46:38 -0500
Message-ID: <34ef1980887c8a6d635c20bdaf748bb0548e51b5.camel@buserror.net> (raw)
In-Reply-To: <90bb659a-bde4-3b8e-8f01-bf22d7534f44@huawei.com>

On Wed, 2019-10-09 at 16:41 +0800, Jason Yan wrote:
> Hi Scott,
> 
> On 2019/10/9 15:13, Scott Wood wrote:
> > On Wed, 2019-10-09 at 14:10 +0800, Jason Yan wrote:
> > > Hi Scott,
> > > 
> > > Would you please take sometime to test this?
> > > 
> > > Thank you so much.
> > > 
> > > On 2019/9/24 13:52, Jason Yan wrote:
> > > > Hi Scott,
> > > > 
> > > > Can you test v7 to see if it works to load a kernel at a non-zero
> > > > address?
> > > > 
> > > > Thanks,
> > 
> > Sorry for the delay.  Here's the output:
> > 
> 
> Thanks for the test.
> 
> > ## Booting kernel from Legacy Image at 10000000 ...
> >     Image Name:   Linux-5.4.0-rc2-00050-g8ac2cf5b4
> >     Image Type:   PowerPC Linux Kernel Image (gzip compressed)
> >     Data Size:    7521134 Bytes = 7.2 MiB
> >     Load Address: 04000000
> >     Entry Point:  04000000
> >     Verifying Checksum ... OK
> > ## Flattened Device Tree blob at 1fc00000
> >     Booting using the fdt blob at 0x1fc00000
> >     Uncompressing Kernel Image ... OK
> >     Loading Device Tree to 07fe0000, end 07fff65c ... OK
> > KASLR: No safe seed for randomizing the kernel base.
> > OF: reserved mem: initialized node qman-fqd, compatible id fsl,qman-fqd
> > OF: reserved mem: initialized node qman-pfdr, compatible id fsl,qman-pfdr
> > OF: reserved mem: initialized node bman-fbpr, compatible id fsl,bman-fbpr
> > Memory CAM mapping: 64/64/64 Mb, residual: 12032Mb
> 
> When boot from 04000000, the max CAM value is 64M. And
> you have a board with 12G memory, CONFIG_LOWMEM_CAM_NUM=3 means only
> 192M memory is mapped and when kernel is randomized at the middle of 
> this 192M memory, we will not have enough continuous memory for node map.
> 
> Can you set CONFIG_LOWMEM_CAM_NUM=8 and see if it works?

OK, that worked.

-Scott



  reply index

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-09-20  9:45 Jason Yan
2019-09-20  9:45 ` [PATCH v7 01/12] powerpc: unify definition of M_IF_NEEDED Jason Yan
2019-09-20  9:45 ` [PATCH v7 02/12] powerpc: move memstart_addr and kernstart_addr to init-common.c Jason Yan
2019-09-20  9:45 ` [PATCH v7 03/12] powerpc: introduce kernstart_virt_addr to store the kernel base Jason Yan
2019-09-20  9:45 ` [PATCH v7 04/12] powerpc/fsl_booke/32: introduce create_kaslr_tlb_entry() helper Jason Yan
2019-09-20  9:45 ` [PATCH v7 05/12] powerpc/fsl_booke/32: introduce reloc_kernel_entry() helper Jason Yan
2019-09-20  9:45 ` [PATCH v7 06/12] powerpc/fsl_booke/32: implement KASLR infrastructure Jason Yan
2019-09-20  9:45 ` [PATCH v7 07/12] powerpc/fsl_booke/32: randomize the kernel image offset Jason Yan
2019-09-20  9:45 ` [PATCH v7 08/12] powerpc/fsl_booke/kaslr: clear the original kernel if randomized Jason Yan
2019-09-20  9:45 ` [PATCH v7 09/12] powerpc/fsl_booke/kaslr: support nokaslr cmdline parameter Jason Yan
2019-09-20  9:45 ` [PATCH v7 10/12] powerpc/fsl_booke/kaslr: dump out kernel offset information on panic Jason Yan
2019-09-20  9:45 ` [PATCH v7 11/12] powerpc/fsl_booke/kaslr: export offset in VMCOREINFO ELF notes Jason Yan
2019-09-20  9:45 ` [PATCH v7 12/12] powerpc/fsl_booke/32: Document KASLR implementation Jason Yan
2019-09-24  5:52 ` [PATCH v7 00/12] implement KASLR for powerpc/fsl_booke/32 Jason Yan
2019-10-09  6:10   ` Jason Yan
2019-10-09  7:13     ` Scott Wood
2019-10-09  8:41       ` Jason Yan
2019-10-09 18:46         ` Scott Wood [this message]
2019-10-21  3:34           ` Jason Yan
2019-10-22 23:22             ` Scott Wood

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