Hi Will,
On Tue, Aug 13, 2019 at 3:10 PM Will Deacon <will@xxxxxxxxxx> wrote:
> On Tue, Aug 13, 2019 at 02:43:23PM +0200, Geert Uytterhoeven wrote:
> > On Fri, Aug 9, 2019 at 6:47 PM Will Deacon <will@xxxxxxxxxx> wrote:
> > > On Wed, Aug 07, 2019 at 04:55:12PM +0100, Steve Capper wrote:
> > > > This patch series adds support for 52-bit kernel VAs using some of the
> > > > machinery already introduced by the 52-bit userspace VA code in 5.0.
> > >
> > > Cheers, I've pushed this out on a for-next/52-bit-kva branch with one
> > > small patch on top and Catalin's tags added.
> >
> > As of commit 14c127c957c1c607 ("arm64: mm: Flip kernel VA space"), the
> > kernel log is spammed with
> >
> > virt_to_phys used for non-linear address: (____ptrval____)
> > (__func__.6603+0x14d681/0x17fb3d)
> > WARNING: CPU: 0 PID: 264 at arch/arm64/mm/physaddr.c:15
> > __virt_to_phys+0x28/0x58
> > Modules linked in:
> > CPU: 0 PID: 264 Comm: mdev Not tainted
> > 5.3.0-rc3-rcar3-initrd-00002-g14c127c957c1c607 #38
> > Hardware name: Renesas Ebisu-4D board based on r8a77990 (DT)
> > pstate: 60000005 (nZCv daif -PAN -UAO)
> > pc : __virt_to_phys+0x28/0x58
> > lr : __virt_to_phys+0x28/0x58
> > sp : ffffffc011953c80
> > x29: ffffffc011953c80 x28: ffffff8078790140
> > x27: 0000000000000000 x26: 0000000000000000
> > x25: ffffffc010a539b9 x24: ffffffc010a86000
> > x23: ffffffc010a539ba x22: 0000000000000001
> > x21: 0000000000202038 x20: 0000000000000001
> > x19: ffffffc010a539b9 x18: 000000000000000a
> > x17: 0000000000000000 x16: 0000000000000000
> > x15: 00000000000ca51d x14: 0720072007200720
> > x13: 0720072007200720 x12: 0720072007200720
> > x11: 0720072007200720 x10: 0720072007200720
> > x9 : 0720072007200720 x8 : 0000000000000001
> > x7 : 0000000000000007 x6 : ffffff8079824f00
> > x5 : 0000000000000140 x4 : 0000000000000000
> > x3 : 0000000000000000 x2 : 00000000ffffffff
> > x1 : 0713abbc9281cf00 x0 : 0000000000000000
> > Call trace:
> > __virt_to_phys+0x28/0x58
> > __check_object_size+0xd0/0x1e0
> > filldir64+0x1d8/0x2b0
> > kernfs_fop_readdir+0x64/0x200
> > iterate_dir+0x68/0x144
> > ksys_getdents64+0x88/0x154
> > __arm64_sys_getdents64+0x18/0x24
> > el0_svc_common.constprop.0+0x84/0xe8
> > el0_svc_compat_handler+0x18/0x20
> > el0_svc_compat+0x8/0x10
> > ---[ end trace 6980a45f636e18be ]---
> >
> > as soon as userspace starts.
>
> Can you try the hack I posted here, please?
>
> https://lkml.org/lkml/2019/8/13/555
Thanks, that seems to do the trick!
Tested-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
> Also, what .config are you using?
Attached.
Probably CONFIG_DEBUG_VIRTUAL=y is what you're missing.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
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ebisu-config.gz
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