On Mon, Mar 29, 2021 at 03:05:25PM +0530, Naresh Kamboju wrote: > On Mon, 29 Mar 2021 at 14:10, Greg Kroah-Hartman > <gregkh@xxxxxxxxxxxxxxxxxxx> wrote: > > > > From: Anshuman Khandual <anshuman.khandual@xxxxxxx> > > > > [ Upstream commit 03aaf83fba6e5af08b5dd174c72edee9b7d9ed9b ] > > > > This overrides arch_get_mappable_range() on arm64 platform which will be > > used with recently added generic framework. It drops > > inside_linear_region() and subsequent check in arch_add_memory() which are > > no longer required. It also adds a VM_BUG_ON() check that would ensure > > that mhp_range_allowed() has already been called. > > > > Link: https://lkml.kernel.org/r/1612149902-7867-3-git-send-email-anshuman.khandual@xxxxxxx > > Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx> > > Reviewed-by: David Hildenbrand <david@xxxxxxxxxx> > > Reviewed-by: Catalin Marinas <catalin.marinas@xxxxxxx> > > Cc: Will Deacon <will@xxxxxxxxxx> > > Cc: Ard Biesheuvel <ardb@xxxxxxxxxx> > > Cc: Mark Rutland <mark.rutland@xxxxxxx> > > Cc: Heiko Carstens <hca@xxxxxxxxxxxxx> > > Cc: Jason Wang <jasowang@xxxxxxxxxx> > > Cc: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx> > > Cc: "Michael S. Tsirkin" <mst@xxxxxxxxxx> > > Cc: Michal Hocko <mhocko@xxxxxxxxxx> > > Cc: Oscar Salvador <osalvador@xxxxxxx> > > Cc: Pankaj Gupta <pankaj.gupta@xxxxxxxxxxxxxxx> > > Cc: Pankaj Gupta <pankaj.gupta.linux@xxxxxxxxx> > > Cc: teawater <teawaterz@xxxxxxxxxxxxxxxxx> > > Cc: Vasily Gorbik <gor@xxxxxxxxxxxxx> > > Cc: Wei Yang <richard.weiyang@xxxxxxxxxxxxxxxxx> > > Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> > > Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> > > Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> > > --- > > arch/arm64/mm/mmu.c | 15 +++++++-------- > > 1 file changed, 7 insertions(+), 8 deletions(-) > > > > diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c > > index 6f0648777d34..92b3be127796 100644 > > --- a/arch/arm64/mm/mmu.c > > +++ b/arch/arm64/mm/mmu.c > > @@ -1443,16 +1443,19 @@ static void __remove_pgd_mapping(pgd_t *pgdir, unsigned long start, u64 size) > > free_empty_tables(start, end, PAGE_OFFSET, PAGE_END); > > } > > > > -static bool inside_linear_region(u64 start, u64 size) > > +struct range arch_get_mappable_range(void) > > { > > + struct range mhp_range; > > + > > /* > > * Linear mapping region is the range [PAGE_OFFSET..(PAGE_END - 1)] > > * accommodating both its ends but excluding PAGE_END. Max physical > > * range which can be mapped inside this linear mapping range, must > > * also be derived from its end points. > > */ > > - return start >= __pa(_PAGE_OFFSET(vabits_actual)) && > > - (start + size - 1) <= __pa(PAGE_END - 1); > > + mhp_range.start = __pa(_PAGE_OFFSET(vabits_actual)); > > + mhp_range.end = __pa(PAGE_END - 1); > > + return mhp_range; > > } > > > > int arch_add_memory(int nid, u64 start, u64 size, > > @@ -1460,11 +1463,7 @@ int arch_add_memory(int nid, u64 start, u64 size, > > { > > int ret, flags = 0; > > > > - if (!inside_linear_region(start, size)) { > > - pr_err("[%llx %llx] is outside linear mapping region\n", start, start + size); > > - return -EINVAL; > > - } > > - > > + VM_BUG_ON(!mhp_range_allowed(start, size, true)); > > if (rodata_full || debug_pagealloc_enabled()) > > flags = NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS; > > The stable rc 5.10 and 5.11 builds failed for arm64 architecture > due to below warnings / errors, > > > Anshuman Khandual <anshuman.khandual@xxxxxxx> > > arm64/mm: define arch_get_mappable_range() > > > arch/arm64/mm/mmu.c: In function 'arch_add_memory': > arch/arm64/mm/mmu.c:1483:13: error: implicit declaration of function > 'mhp_range_allowed'; did you mean 'cpu_map_prog_allowed'? > [-Werror=implicit-function-declaration] > VM_BUG_ON(!mhp_range_allowed(start, size, true)); > ^ > include/linux/build_bug.h:30:63: note: in definition of macro > 'BUILD_BUG_ON_INVALID' > #define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e)))) > ^ > arch/arm64/mm/mmu.c:1483:2: note: in expansion of macro 'VM_BUG_ON' > VM_BUG_ON(!mhp_range_allowed(start, size, true)); > ^~~~~~~~~ > > Build link, > https://ci.linaro.org/view/lkft/job/openembedded-lkft-linux-stable-rc-5.11/DISTRO=lkft,MACHINE=juno,label=docker-buster-lkft/41/consoleText > https://ci.linaro.org/view/lkft/job/openembedded-lkft-linux-stable-rc-5.10/DISTRO=lkft,MACHINE=dragonboard-410c,label=docker-buster-lkft/120/consoleFull thanks, will go drop this, and the patch that was after it in the series, from both trees and will push out a -rc2. Note, I used tuxbuild before doing this release, and it does not show this error in the arm64 defconfigs. What config did you use to trigger this? thanks, greg k-h
