Date: Wed, 22 Aug 2018 18:46:03 +0300 From: Konstantin Belousov <kostikbel@gmail.com> To: Michael Gmelin <freebsd@grem.de> Cc: John Baldwin <jhb@FreeBSD.org>, "freebsd-current@freebsd.org" <freebsd-current@freebsd.org>, Matthias Apitz <guru@unixarea.de> Subject: Re: Fatal trap 12: page fault on Acer Chromebook 720 (peppy) Message-ID: <20180822154603.GW2340@kib.kiev.ua> In-Reply-To: <57B6DC4C-16EE-4B7B-B691-CB79D8C40289@grem.de> References: <20180815135531.GA2340@kib.kiev.ua> <FAEA5B0A-5302-4A48-B322-21CB0D97C8CC@grem.de> <e82ed552-83b0-5331-3117-6750b8c205f7@FreeBSD.org> <07E28AC5-EBE6-4893-810A-6C03F07925C8@grem.de> <8726bc32-6023-bfe1-7600-5b2c706236f8@FreeBSD.org> <20180819165951.274d61b0@bsd64.grem.de> <20180819161642.GP2340@kib.kiev.ua> <20180820004512.5171fa75@bsd64.grem.de> <20180820150904.GS2340@kib.kiev.ua> <57B6DC4C-16EE-4B7B-B691-CB79D8C40289@grem.de>
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On Tue, Aug 21, 2018 at 12:14:35AM +0200, Michael Gmelin wrote: > > > > On 20. Aug 2018, at 17:09, Konstantin Belousov <kostikbel@gmail.com> wrote: > > > >> On Mon, Aug 20, 2018 at 12:45:12AM +0200, Michael Gmelin wrote: > >> > >> See here for a screenshot (also including the output of "show pte > >> 0xfffff80001000000"): > >> > >> https://gist.github.com/grembo/78d0f2a100dd4f16775b85a118769658#file-ddb1-png > > It is too early for ddb routines to register. > > Ok can you try the following debugging patch, to verify my guess ? > > > > diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c > > index 18777d23f09..cd05fdb763f 100644 > > --- a/sys/amd64/amd64/pmap.c > > +++ b/sys/amd64/amd64/pmap.c > > @@ -1052,8 +1052,7 @@ create_pagetables(vm_paddr_t *firstaddr) > > pd_p = (pd_entry_t *)DMPDkernphys; > > for (i = 0; i < (NPDEPG * nkdmpde); i++) > > pd_p[i] = (i << PDRSHIFT) | X86_PG_V | PG_PS | pg_g | > > - X86_PG_M | X86_PG_A | pg_nx | > > - bootaddr_rwx(i << PDRSHIFT); > > + X86_PG_M | X86_PG_A | pg_nx | X86_PG_RW; > > for (i = 0; i < nkdmpde; i++) > > pdp_p[i] = (DMPDkernphys + ptoa(i)) | X86_PG_RW | > > X86_PG_V; > > With this change it boots okay (mptramp_pagetables is 0x1000000, as expected). Can you apply the following on top of the previous debugging patch and show me the line printed ? diff --git a/sys/amd64/amd64/pmap.c b/sys/amd64/amd64/pmap.c index 3d70532b7fd..613fa9f2165 100644 --- a/sys/amd64/amd64/pmap.c +++ b/sys/amd64/amd64/pmap.c @@ -2662,6 +2662,7 @@ pmap_pinit0(pmap_t pmap) pmap->pm_pcids[i].pm_gen = 1; } pmap_activate_boot(pmap); +printf("bootaddr addr %#lx rwx %#lx btext %#lx _end %#lx brwsection %#lx etext %#lx KERNBASE %#lx\n", 0x1000000UL, bootaddr_rwx(0x1000000UL), (uintptr_t)btext, (uintptr_t)_end, (uintptr_t)brwsection, (uintptr_t)etext, (uintptr_t)KERNBASE); } void
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