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From:
Mike Larkin <mlarkin@nested.page>
Subject:
Re: amd64: zero direct map page tables in pmap_bootstrap
To:
Amit Kulkarni <amitkulz@gmail.com>
Cc:
Chris Cunningham <chris@abditory.io>, "tech@openbsd.org" <tech@openbsd.org>
Date:
Sun, 5 Apr 2026 12:09:15 -0700

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  • Mike Larkin:

    amd64: zero direct map page tables in pmap_bootstrap

  • On Sun, Apr 05, 2026 at 11:23:44AM -0500, Amit Kulkarni wrote:
    > >
    > > > cpu62 at mainbus0: apid 124 (application processor)
    > > > cpu62: AMD Ryzen Threadripper PRO 9995WX 96-Cores, 2497.12 MHz,
    > > 1a-08-01, patch 0b008112
    > > > cpu62: cpuid 8000001F edx=-ca00446+121a0100
    > > > cpu62: smt 0, core 62, package 0
    > > > cpu63 at mainbus0: apid 126 (application processor)
    > > > cpu63: AMD Ryzen Threadripper PRO 9995WX 96-Cores, 2497.12 MHz,
    > > 1a-08-01, patch 0b008112
    > > > cpu63: cpuid 8000001F edx=-1100900+4c446453
    > > > cpu63: smt 0, core 63, package 0
    > >
    > >
    > Is it also capped at 64 CPUs? It should show 96.
    
    indeed. I added support for that a few months back. Maybe the tree is
    downlevel in this build?
    
    Also i think cpu0-191 should show up here.
    
    
  • Mike Larkin:

    amd64: zero direct map page tables in pmap_bootstrap