> -----Original Message----- > From: Linuxppc-dev [mailto:linuxppc-dev- > bounces+bharat.bhushan=freescale....@lists.ozlabs.org] On Behalf Of Tiejun > Chen > Sent: Tuesday, July 09, 2013 1:33 PM > To: b...@kernel.crashing.org > Cc: linuxppc-...@lists.ozlabs.org; linux-kernel@vger.kernel.org > Subject: [v3][PATCH 7/8] book3e/kexec/kdump: redefine VIRT_PHYS_OFFSET > > Book3e is always aligned 1GB to create TLB so we should > use (KERNELBASE - MEMORY_START) as VIRT_PHYS_OFFSET to > get __pa/__va properly while boot kdump. > > Signed-off-by: Tiejun Chen <tiejun.c...@windriver.com> > --- > arch/powerpc/include/asm/page.h | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/arch/powerpc/include/asm/page.h b/arch/powerpc/include/asm/page.h > index 988c812..5b00081 100644 > --- a/arch/powerpc/include/asm/page.h > +++ b/arch/powerpc/include/asm/page.h > @@ -112,6 +112,8 @@ extern long long virt_phys_offset; > /* See Description below for VIRT_PHYS_OFFSET */ > #ifdef CONFIG_RELOCATABLE_PPC32 > #define VIRT_PHYS_OFFSET virt_phys_offset > +#elif defined(CONFIG_PPC_BOOK3E_64) > +#define VIRT_PHYS_OFFSET (KERNELBASE - MEMORY_START)
Can you please explain this code a bit more. I am not understanding this part:) -Bharat > #else > #define VIRT_PHYS_OFFSET (KERNELBASE - PHYSICAL_START) > #endif > -- > 1.7.9.5 > > _______________________________________________ > Linuxppc-dev mailing list > linuxppc-...@lists.ozlabs.org > https://lists.ozlabs.org/listinfo/linuxppc-dev -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
