| Message ID | 1513184845-8711-8-git-send-email-kristina.martsenko@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 13/12/17 17:07, Kristina Martsenko wrote: > PHYS_MASK_SHIFT represents the highest possible physical address > supported by the kernel, and is used in a number of places. In order to > support 52-bit physical memory, increase PHYS_MASK_SHIFT to 52 when > 52-bit physical memory is configured, and retain 48 if it is not, to > e.g. keep IDMAP_PGTABLE_LEVELS accurate. (The kconfig option to set > ARM64_PA_BITS to 52 will be added in a later patch.) > > Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> > --- > arch/arm64/include/asm/pgtable-hwdef.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h > index 60e0432df559..03fe82057bd1 100644 > --- a/arch/arm64/include/asm/pgtable-hwdef.h > +++ b/arch/arm64/include/asm/pgtable-hwdef.h > @@ -206,7 +206,7 @@ > /* > * Highest possible physical address supported. > */ > -#define PHYS_MASK_SHIFT (48) > +#define PHYS_MASK_SHIFT (CONFIG_ARM64_PA_BITS) > #define PHYS_MASK ((UL(1) << PHYS_MASK_SHIFT) - 1) > > /* > Kristina, The changes look good to me. I believe this patch and the next one could be merged to patch 1 in the series. Eitherway, Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com> Cheers Suzuki
diff --git a/arch/arm64/include/asm/pgtable-hwdef.h b/arch/arm64/include/asm/pgtable-hwdef.h index 60e0432df559..03fe82057bd1 100644 --- a/arch/arm64/include/asm/pgtable-hwdef.h +++ b/arch/arm64/include/asm/pgtable-hwdef.h @@ -206,7 +206,7 @@ /* * Highest possible physical address supported. */ -#define PHYS_MASK_SHIFT (48) +#define PHYS_MASK_SHIFT (CONFIG_ARM64_PA_BITS) #define PHYS_MASK ((UL(1) << PHYS_MASK_SHIFT) - 1) /*
PHYS_MASK_SHIFT represents the highest possible physical address supported by the kernel, and is used in a number of places. In order to support 52-bit physical memory, increase PHYS_MASK_SHIFT to 52 when 52-bit physical memory is configured, and retain 48 if it is not, to e.g. keep IDMAP_PGTABLE_LEVELS accurate. (The kconfig option to set ARM64_PA_BITS to 52 will be added in a later patch.) Signed-off-by: Kristina Martsenko <kristina.martsenko@arm.com> --- arch/arm64/include/asm/pgtable-hwdef.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)