| Message ID | 1627281445-12445-11-git-send-email-anshuman.khandual@arm.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | arm64/mm: Enable FEAT_LPA2 (52 bits PA support on 4K|16K pages) | expand |
On Mon, Jul 26, 2021 at 12:07:25PM +0530, Anshuman Khandual wrote: > All required FEAT_LPA2 components for 52 bit PA range are already in place. > Just enable CONFIG_ARM64_PA_BITS_52 on 4K and 16K pages which would select > CONFIG_ARM64_PA_BITS_52_LPA2 activating 52 bit PA range via FEAT_LPA2. > > Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> > --- > arch/arm64/Kconfig | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig > index 1999ac6..ce139415 100644 > --- a/arch/arm64/Kconfig > +++ b/arch/arm64/Kconfig > @@ -952,9 +952,9 @@ config ARM64_PA_BITS_48 > > config ARM64_PA_BITS_52 > bool "52-bit (ARMv8.2)" > - depends on ARM64_64K_PAGES > depends on ARM64_PAN || !ARM64_SW_TTBR0_PAN > select ARM64_PA_BITS_52_LPA if ARM64_64K_PAGES > + select ARM64_PA_BITS_52_LPA2 if (ARM64_4K_PAGES || ARM64_16K_PAGES) > help > Enable support for a 52-bit physical address space, introduced as > part of the ARMv8.2-LPA extension. If you do it this way, the text here needs updating and the 8.2 architecture version removed.
On 8/5/21 10:53 PM, Catalin Marinas wrote: > On Mon, Jul 26, 2021 at 12:07:25PM +0530, Anshuman Khandual wrote: >> All required FEAT_LPA2 components for 52 bit PA range are already in place. >> Just enable CONFIG_ARM64_PA_BITS_52 on 4K and 16K pages which would select >> CONFIG_ARM64_PA_BITS_52_LPA2 activating 52 bit PA range via FEAT_LPA2. >> >> Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> >> --- >> arch/arm64/Kconfig | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig >> index 1999ac6..ce139415 100644 >> --- a/arch/arm64/Kconfig >> +++ b/arch/arm64/Kconfig >> @@ -952,9 +952,9 @@ config ARM64_PA_BITS_48 >> >> config ARM64_PA_BITS_52 >> bool "52-bit (ARMv8.2)" >> - depends on ARM64_64K_PAGES >> depends on ARM64_PAN || !ARM64_SW_TTBR0_PAN >> select ARM64_PA_BITS_52_LPA if ARM64_64K_PAGES >> + select ARM64_PA_BITS_52_LPA2 if (ARM64_4K_PAGES || ARM64_16K_PAGES) >> help >> Enable support for a 52-bit physical address space, introduced as >> part of the ARMv8.2-LPA extension. > > If you do it this way, the text here needs updating and the 8.2 > architecture version removed. Sure, will update as required.
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1999ac6..ce139415 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -952,9 +952,9 @@ config ARM64_PA_BITS_48 config ARM64_PA_BITS_52 bool "52-bit (ARMv8.2)" - depends on ARM64_64K_PAGES depends on ARM64_PAN || !ARM64_SW_TTBR0_PAN select ARM64_PA_BITS_52_LPA if ARM64_64K_PAGES + select ARM64_PA_BITS_52_LPA2 if (ARM64_4K_PAGES || ARM64_16K_PAGES) help Enable support for a 52-bit physical address space, introduced as part of the ARMv8.2-LPA extension.
All required FEAT_LPA2 components for 52 bit PA range are already in place. Just enable CONFIG_ARM64_PA_BITS_52 on 4K and 16K pages which would select CONFIG_ARM64_PA_BITS_52_LPA2 activating 52 bit PA range via FEAT_LPA2. Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com> --- arch/arm64/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)