| Message ID | 20241202043553.29592-1-anshuman.khandual@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | arm64/mm: Drop INIT_MM_CONTEXT() | expand |
On Mon, 2 Dec 2024 at 05:36, Anshuman Khandual <anshuman.khandual@arm.com> wrote: > > Platform override for INIT_MM_CONTEXT() is redundant because swapper_pg_dir > always gets assigned as the pgd during init_mm initialization. So just drop > this override on arm64. > > Originally this override was added via the 'commit 2b5548b68199 ("arm64/mm: > Separate boot-time page tables from swapper_pg_dir")' because non standard > init_pg_dir was assigned as the pgd. Subsequently it was changed as default > swapper_pg_dir by the 'commit ba5b0333a847 ("arm64: mm: omit redundant > remap of kernel image")', which might have also just dropped this override. > > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will@kernel.org> > Cc: Ard Biesheuvel <ardb@kernel.org> > Cc: Ryan Roberts <ryan.roberts@arm.com> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Acked-by: Ard Biesheuvel <ardb@kernel.org> > --- > This patch applies on v6.13-rc1 > > arch/arm64/include/asm/mmu.h | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h > index 2ec96d91acc6..662471cfc536 100644 > --- a/arch/arm64/include/asm/mmu.h > +++ b/arch/arm64/include/asm/mmu.h > @@ -109,8 +109,5 @@ static inline bool kaslr_requires_kpti(void) > return true; > } > > -#define INIT_MM_CONTEXT(name) \ > - .pgd = swapper_pg_dir, > - > #endif /* !__ASSEMBLY__ */ > #endif > -- > 2.30.2 >
On 02/12/2024 04:35, Anshuman Khandual wrote: > Platform override for INIT_MM_CONTEXT() is redundant because swapper_pg_dir > always gets assigned as the pgd during init_mm initialization. So just drop > this override on arm64. > > Originally this override was added via the 'commit 2b5548b68199 ("arm64/mm: > Separate boot-time page tables from swapper_pg_dir")' because non standard > init_pg_dir was assigned as the pgd. Subsequently it was changed as default > swapper_pg_dir by the 'commit ba5b0333a847 ("arm64: mm: omit redundant > remap of kernel image")', which might have also just dropped this override. > > Cc: Catalin Marinas <catalin.marinas@arm.com> > Cc: Will Deacon <will@kernel.org> > Cc: Ard Biesheuvel <ardb@kernel.org> > Cc: Ryan Roberts <ryan.roberts@arm.com> > Cc: Mark Rutland <mark.rutland@arm.com> > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-kernel@vger.kernel.org > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> Reviewed-by: Ryan Roberts <ryan.roberts@arm.com> > --- > This patch applies on v6.13-rc1 > > arch/arm64/include/asm/mmu.h | 3 --- > 1 file changed, 3 deletions(-) > > diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h > index 2ec96d91acc6..662471cfc536 100644 > --- a/arch/arm64/include/asm/mmu.h > +++ b/arch/arm64/include/asm/mmu.h > @@ -109,8 +109,5 @@ static inline bool kaslr_requires_kpti(void) > return true; > } > > -#define INIT_MM_CONTEXT(name) \ > - .pgd = swapper_pg_dir, > - > #endif /* !__ASSEMBLY__ */ > #endif
diff --git a/arch/arm64/include/asm/mmu.h b/arch/arm64/include/asm/mmu.h index 2ec96d91acc6..662471cfc536 100644 --- a/arch/arm64/include/asm/mmu.h +++ b/arch/arm64/include/asm/mmu.h @@ -109,8 +109,5 @@ static inline bool kaslr_requires_kpti(void) return true; } -#define INIT_MM_CONTEXT(name) \ - .pgd = swapper_pg_dir, - #endif /* !__ASSEMBLY__ */ #endif
Platform override for INIT_MM_CONTEXT() is redundant because swapper_pg_dir always gets assigned as the pgd during init_mm initialization. So just drop this override on arm64. Originally this override was added via the 'commit 2b5548b68199 ("arm64/mm: Separate boot-time page tables from swapper_pg_dir")' because non standard init_pg_dir was assigned as the pgd. Subsequently it was changed as default swapper_pg_dir by the 'commit ba5b0333a847 ("arm64: mm: omit redundant remap of kernel image")', which might have also just dropped this override. Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Will Deacon <will@kernel.org> Cc: Ard Biesheuvel <ardb@kernel.org> Cc: Ryan Roberts <ryan.roberts@arm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: linux-arm-kernel@lists.infradead.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- This patch applies on v6.13-rc1 arch/arm64/include/asm/mmu.h | 3 --- 1 file changed, 3 deletions(-)