Re: [PATCH v2 2/6] MIPS: tlb-r4k: If there are wired entries, don't use TLBINVF

From: Ralf Baechle
Date: Thu Sep 22 2016 - 08:11:58 EST

On Tue, Sep 20, 2016 at 09:47:25AM +0100, Matt Redfearn wrote:

> When adding a wired entry to the TLB via add_wired_entry, the tlb is
> flushed with local_flush_tlb_all, which on CPUs with TLBINV results in
> the new wired entry being flushed again.
> Behavior of the TLBINV instruction applies to all applicable TLB entries
> and is unaffected by the setting of the Wired register. Therefore if
> the TLB has any wired entries, fall back to iterating over the entries
> rather than blasting them all using TLBINVF.
> Signed-off-by: Matt Redfearn <matt.redfearn@xxxxxxxxxx>

Queued for 4.9..