From: Rik van Riel <riel@surriel.com>
To: Borislav Petkov <bp@alien8.de>
Cc: x86@kernel.org, linux-kernel@vger.kernel.org,
peterz@infradead.org, dave.hansen@linux.intel.com,
zhengqi.arch@bytedance.com, nadav.amit@gmail.com,
thomas.lendacky@amd.com, kernel-team@meta.com,
linux-mm@kvack.org, akpm@linux-foundation.org,
jackmanb@google.com, jannh@google.com, mhklinux@outlook.com,
andrew.cooper3@citrix.com, Manali.Shukla@amd.com,
Dave Hansen <dave.hansen@intel.com>
Subject: Re: [PATCH v12 04/16] x86/mm: get INVLPGB count max from CPUID
Date: Thu, 20 Feb 2025 21:25:15 -0500 [thread overview]
Message-ID: <ef1792cc40b5812975008a9646a9ba8f3b432a62.camel@surriel.com> (raw)
In-Reply-To: <20250221015801.GHZ7fdqaGFEvsG6qW1@fat_crate.local>
On Fri, 2025-02-21 at 02:58 +0100, Borislav Petkov wrote:
> On Thu, Feb 20, 2025 at 07:53:03PM -0500, Rik van Riel wrote:
> > diff --git a/arch/x86/Kconfig.cpu b/arch/x86/Kconfig.cpu
> > index 2a7279d80460..bb6943c21b7f 100644
> > --- a/arch/x86/Kconfig.cpu
> > +++ b/arch/x86/Kconfig.cpu
> > @@ -401,6 +401,10 @@ menuconfig PROCESSOR_SELECT
> > This lets you choose what x86 vendor support code your
> > kernel
> > will include.
> >
> > +config X86_BROADCAST_TLB_FLUSH
> > + def_bool y
> > + depends on CPU_SUP_AMD && 64BIT
> > +
> > config CPU_SUP_INTEL
> > default y
> > bool "Support Intel processors" if PROCESSOR_SELECT
> > @@ -431,6 +435,7 @@ config CPU_SUP_CYRIX_32
> > config CPU_SUP_AMD
> > default y
> > bool "Support AMD processors" if PROCESSOR_SELECT
> > + select X86_BROADCAST_TLB_FLUSH
> > help
> > This enables detection, tunings and quirks for AMD
> > processors
>
> You missed my comment again. How about you read review feedback more
> carefully
> please?
>
I try, but most of my brainpower the last round was
spent trying to figure out what to do where you and
Dave both wanted something different :)
> CPU_SUP_AMD selects X86_BROADCAST_TLB_FLUSH which depends on
> CPU_SUP_AMD which
> selects X86_BROADCAST_TLB_FLUSH which depends on CPU_SUP_AMD...
I'll fix that to have it depend only on 64BIT.
--
All Rights Reversed.
next prev parent reply other threads:[~2025-02-21 2:26 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-02-21 0:52 [PATCH v12 00/16] AMD broadcast TLB invalidation Rik van Riel
2025-02-21 0:53 ` [PATCH v12 01/16] x86/mm: make MMU_GATHER_RCU_TABLE_FREE unconditional Rik van Riel
2025-02-21 0:53 ` [PATCH v12 02/16] x86/mm: remove pv_ops.mmu.tlb_remove_table call Rik van Riel
2025-02-21 0:53 ` [PATCH v12 03/16] x86/mm: consolidate full flush threshold decision Rik van Riel
2025-02-21 0:53 ` [PATCH v12 04/16] x86/mm: get INVLPGB count max from CPUID Rik van Riel
2025-02-21 1:58 ` Borislav Petkov
2025-02-21 2:25 ` Rik van Riel [this message]
2025-02-21 18:03 ` [PATCH v12.1 " Rik van Riel
2025-02-21 18:41 ` Tom Lendacky
2025-02-22 3:35 ` [PATCH v12.2 " Rik van Riel
2025-02-21 0:53 ` [PATCH v12 05/16] x86/mm: add INVLPGB support code Rik van Riel
2025-02-21 0:53 ` [PATCH v12 06/16] x86/mm: use INVLPGB for kernel TLB flushes Rik van Riel
2025-02-21 0:53 ` [PATCH v12 07/16] x86/mm: use INVLPGB in flush_tlb_all Rik van Riel
2025-02-21 0:53 ` [PATCH v12 08/16] x86/mm: use broadcast TLB flushing for page reclaim TLB flushing Rik van Riel
2025-02-21 0:53 ` [PATCH v12 09/16] x86/mm: global ASID allocation helper functions Rik van Riel
2025-02-21 0:53 ` [PATCH v12 10/16] x86/mm: global ASID context switch & TLB flush handling Rik van Riel
2025-02-21 0:53 ` [PATCH v12 11/16] x86/mm: global ASID process exit helpers Rik van Riel
2025-02-21 0:53 ` [PATCH v12 12/16] x86/mm: enable broadcast TLB invalidation for multi-threaded processes Rik van Riel
2025-02-21 0:53 ` [PATCH v12 13/16] x86/mm: do targeted broadcast flushing from tlbbatch code Rik van Riel
2025-02-21 0:53 ` [PATCH v12 14/16] x86/mm: enable AMD translation cache extensions Rik van Riel
2025-02-21 0:53 ` [PATCH v12 15/16] x86/mm: only invalidate final translations with INVLPGB Rik van Riel
2025-02-21 0:53 ` [PATCH v12 16/16] x86/mm: add noinvlpgb commandline option Rik van Riel
2025-02-22 11:29 ` [PATCH v12 00/16] AMD broadcast TLB invalidation Oleksandr Natalenko
2025-02-22 11:36 ` Oleksandr Natalenko
2025-02-22 16:05 ` Rik van Riel
2025-02-22 16:19 ` Borislav Petkov
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