On Sat, 2016-09-04 at 06:14:03 UTC, "Aneesh Kumar K.V" wrote:
> With P9 Radix we need to do
>
> * set UPRT = 1
> * set different TLB set count
>
> In this patch we delay the UPRT=1 to early mmu init. This help us to
> keep the cpu table setup and restore cpu callback the same across
> different MMU model.
>
> This also implies that a cpu_restore cur_cpu_spec callback won't set
> UPRT=1. We currently use that for secondary cpu init and on primary
> after we did an opal reinit for endian switch. In both the case
> we call early_mmu_init after the above operations. This set UPRT
> to correct value.
This probably needs a new subject and updated change log as it is mainly adding
the setup code.
> diff --git a/arch/powerpc/kernel/cputable.c b/arch/powerpc/kernel/cputable.c
> index 6c662b8de90d..e009722d5914 100644
> --- a/arch/powerpc/kernel/cputable.c
> +++ b/arch/powerpc/kernel/cputable.c
> @@ -514,7 +514,7 @@ static struct cpu_spec __initdata cpu_specs[] = {
> .cpu_features = CPU_FTRS_POWER9,
> .cpu_user_features = COMMON_USER_POWER9,
> .cpu_user_features2 = COMMON_USER2_POWER9,
> - .mmu_features = MMU_FTRS_POWER9,
> + .mmu_features = MMU_FTRS_POWER9 | MMU_FTR_RADIX,
I think we discussed this before, but I want to drop this.
That will mean the only way MMU_FTR_RADIX is enabled is via ibm,pa-features (in
the next patch).
cheers
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