Hi Will, Steve,
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.
As this commit cannot be reverted easily, I had to revert the full branch with
"git revert -m 1 6ce0dc725177e9856c9a67f2e2cabb3f7a3d90d7".
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
