[PATCH v2 02/12] arm64/mm: Add FEAT_LPA2 specific ID_AA64MMFR0.TGRAN[2]

[Catalin Marinas]

On Thu, Apr 13, 2023 at 09:16:03AM +0100, Ryan Roberts wrote:
> On 12/04/2023 17:27, Catalin Marinas wrote:
> > On Mon, Mar 06, 2023 at 07:54:28PM +0000, Ryan Roberts wrote:
> >> diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
> >> index 9e3ecba3c4e6..7f708eecc3ad 100644
> >> --- a/arch/arm64/include/asm/sysreg.h
> >> +++ b/arch/arm64/include/asm/sysreg.h
> >> @@ -609,10 +609,12 @@
> >>  
> >>  /* id_aa64mmfr0 */
> >>  #define ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED_MIN	0x0
> >> +#define ID_AA64MMFR0_EL1_TGRAN4_LPA2		ID_AA64MMFR0_EL1_TGRAN4_52_BIT
> >>  #define ID_AA64MMFR0_EL1_TGRAN4_SUPPORTED_MAX	0x7
> >>  #define ID_AA64MMFR0_EL1_TGRAN64_SUPPORTED_MIN	0x0
> >>  #define ID_AA64MMFR0_EL1_TGRAN64_SUPPORTED_MAX	0x7
> >>  #define ID_AA64MMFR0_EL1_TGRAN16_SUPPORTED_MIN	0x1
> >> +#define ID_AA64MMFR0_EL1_TGRAN16_LPA2		ID_AA64MMFR0_EL1_TGRAN16_52_BIT
> >>  #define ID_AA64MMFR0_EL1_TGRAN16_SUPPORTED_MAX	0xf
> > 
> > This patch evolved a bit since I first acked it in Anshuman's series. I
> > can't find any trace of ID_AA64MMFR0_EL1_TGRAN4_52_BIT in the kernel. Is
> > it introduced in a later patch?
> 
> It's autogenerated as part of the sysreg magic. Ends up in
> arch/arm64/include/generated/asm/sysreg-defs.h.

Ah, I keep forgetting this (I usually build the kernel in a different
directory, so grep doesn't encounter it).

-- 
Catalin