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| author | Kirill A. Shutemov <kirill.shutemov@linux.intel.com> | 2018-02-14 21:25:40 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-02-16 10:48:48 +0100 |
| commit | 98219dda2ab56ce2a967fdebf81e838d676d9ddc (patch) | |
| tree | a8c3e987dfd3ad335dd24231e3752801bca92173 /arch/x86/include/asm/paravirt.h | |
| parent | 6f9dd329717f696f578347c0781a0247db957596 (diff) | |
| download | linux-0-day-98219dda2ab56ce2a967fdebf81e838d676d9ddc.tar.gz linux-0-day-98219dda2ab56ce2a967fdebf81e838d676d9ddc.tar.xz | |
x86/mm: Fold p4d page table layer at runtime
Change page table helpers to fold p4d at runtime.
The logic is the same as in <asm-generic/pgtable-nop4d.h>.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Borislav Petkov <bp@suse.de>
Cc: Dan Williams <dan.j.williams@intel.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mm@kvack.org
Link: http://lkml.kernel.org/r/20180214182542.69302-8-kirill.shutemov@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include/asm/paravirt.h')
| -rw-r--r-- | arch/x86/include/asm/paravirt.h | 10 |
1 files changed, 6 insertions, 4 deletions
diff --git a/arch/x86/include/asm/paravirt.h b/arch/x86/include/asm/paravirt.h index 892df375b6155..3fbaad238a946 100644 --- a/arch/x86/include/asm/paravirt.h +++ b/arch/x86/include/asm/paravirt.h @@ -569,14 +569,16 @@ static inline p4dval_t p4d_val(p4d_t p4d) static inline void set_pgd(pgd_t *pgdp, pgd_t pgd) { - pgdval_t val = native_pgd_val(pgd); - - PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp, val); + if (pgtable_l5_enabled) + PVOP_VCALL2(pv_mmu_ops.set_pgd, pgdp, native_pgd_val(pgd)); + else + set_p4d((p4d_t *)(pgdp), (p4d_t) { pgd.pgd }); } static inline void pgd_clear(pgd_t *pgdp) { - set_pgd(pgdp, __pgd(0)); + if (pgtable_l5_enabled) + set_pgd(pgdp, __pgd(0)); } #endif /* CONFIG_PGTABLE_LEVELS == 5 */ |