On 01/28/2020 06:57 AM, Anshuman Khandual wrote: > This adds tests which will validate architecture page table helpers and > other accessors in their compliance with expected generic MM semantics. > This will help various architectures in validating changes to existing > page table helpers or addition of new ones. > > This test covers basic page table entry transformations including but not > limited to old, young, dirty, clean, write, write protect etc at various > level along with populating intermediate entries with next page table page > and validating them. > > Test page table pages are allocated from system memory with required size > and alignments. The mapped pfns at page table levels are derived from a > real pfn representing a valid kernel text symbol. This test gets called > right after page_alloc_init_late(). > > This gets build and run when CONFIG_DEBUG_VM_PGTABLE is selected along with > CONFIG_VM_DEBUG. Architectures willing to subscribe this test also need to > select CONFIG_ARCH_HAS_DEBUG_VM_PGTABLE which for now is limited to x86 and > arm64. Going forward, other architectures too can enable this after fixing > build or runtime problems (if any) with their page table helpers. > > Folks interested in making sure that a given platform's page table helpers > conform to expected generic MM semantics should enable the above config > which will just trigger this test during boot. Any non conformity here will > be reported as an warning which would need to be fixed. This test will help > catch any changes to the agreed upon semantics expected from generic MM and > enable platforms to accommodate it thereafter. > > Cc: Andrew Morton <[email protected]> > Cc: Vlastimil Babka <[email protected]> > Cc: Greg Kroah-Hartman <[email protected]> > Cc: Thomas Gleixner <[email protected]> > Cc: Mike Rapoport <[email protected]> > Cc: Jason Gunthorpe <[email protected]> > Cc: Dan Williams <[email protected]> > Cc: Peter Zijlstra <[email protected]> > Cc: Michal Hocko <[email protected]> > Cc: Mark Rutland <[email protected]> > Cc: Mark Brown <[email protected]> > Cc: Steven Price <[email protected]> > Cc: Ard Biesheuvel <[email protected]> > Cc: Masahiro Yamada <[email protected]> > Cc: Kees Cook <[email protected]> > Cc: Tetsuo Handa <[email protected]> > Cc: Matthew Wilcox <[email protected]> > Cc: Sri Krishna chowdary <[email protected]> > Cc: Dave Hansen <[email protected]> > Cc: Russell King - ARM Linux <[email protected]> > Cc: Michael Ellerman <[email protected]> > Cc: Paul Mackerras <[email protected]> > Cc: Martin Schwidefsky <[email protected]> > Cc: Heiko Carstens <[email protected]> > Cc: "David S. Miller" <[email protected]> > Cc: Vineet Gupta <[email protected]> > Cc: James Hogan <[email protected]> > Cc: Paul Burton <[email protected]> > Cc: Ralf Baechle <[email protected]> > Cc: Kirill A. Shutemov <[email protected]> > Cc: Gerald Schaefer <[email protected]> > Cc: Christophe Leroy <[email protected]> > Cc: Ingo Molnar <[email protected]> > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected] > Cc: [email protected]
I should have included mailing lists for all missing platforms here. Will add them in the patch next time around but for now just adding them here explicitly so that hopefully in case some of them can build and run the test successfully on respective platforms. ALPHA: + [email protected] + Richard Henderson <[email protected]> + Ivan Kokshaysky <[email protected]> + Matt Turner <[email protected]> C6X: + [email protected] + Mark Salter <[email protected]> + Aurelien Jacquiot <[email protected]> H8300: + [email protected] + Yoshinori Sato <[email protected]> HEXAGON: + [email protected] + Brian Cain <[email protected]> M68K: + [email protected] + Geert Uytterhoeven <[email protected]> MICROBLAZE: + Michal Simek <[email protected]> RISCV: + [email protected] + Paul Walmsley <[email protected]> + Palmer Dabbelt <[email protected]> UNICORE32: + Guan Xuetao <[email protected]> XTENSA: + [email protected] + Chris Zankel <[email protected]> + Max Filippov <[email protected]> Please feel free to add others if I have missed. _______________________________________________ linux-snps-arc mailing list [email protected] http://lists.infradead.org/mailman/listinfo/linux-snps-arc
