Date: Sat, 9 Apr 2022 00:31:09 -0500 From: Kyle Evans <kevans@freebsd.org> To: Andrew Turner <andrew@freebsd.org> Cc: src-committers <src-committers@freebsd.org>, "<dev-commits-src-all@freebsd.org>" <dev-commits-src-all@freebsd.org>, dev-commits-src-main@freebsd.org Subject: Re: git: bcd763b642ab - main - Move the arm64 DMAP creation to C Message-ID: <CACNAnaHJ4A=ynv5xt7sEh-wAWog6XtU26d2yyoMPGfdxxNUGYQ@mail.gmail.com> In-Reply-To: <202204061324.236DO0pe071404@gitrepo.freebsd.org> References: <202204061324.236DO0pe071404@gitrepo.freebsd.org>
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On Wed, Apr 6, 2022 at 8:24 AM Andrew Turner <andrew@freebsd.org> wrote: > > The branch main has been updated by andrew: > > URL: https://cgit.FreeBSD.org/src/commit/?id=bcd763b642abb4b236902e84184c579225265fb7 > > commit bcd763b642abb4b236902e84184c579225265fb7 > Author: Andrew Turner <andrew@FreeBSD.org> > AuthorDate: 2022-03-15 17:05:48 +0000 > Commit: Andrew Turner <andrew@FreeBSD.org> > CommitDate: 2022-04-06 13:09:49 +0000 > > Move the arm64 DMAP creation to C > > To simplify the creation of the direct map (DMAP) region on arm64 move > it from the pre-C code into pmap. This simplifies the DMAP creation > as we can use the notmal index macros, and should reduce the number > of pages needed to hold the level 1 tables to just those needed. > > Reviewed by: alc, dch > Tested by: dch, kevans > Sponsored by: The FreeBSD Foundation > Differential Revision: https://reviews.freebsd.org/D34568 Our Ampere boxes were fine with this, but this seems to tickle something on this M1 mini that I have. Specifically, we end up dying while probing UEFI stuff, here: https://cgit.freebsd.org/src/tree/sys/dev/efidev/efirt.c#n183 efi_systbl_phys == 0x9e0979f30, efi_systbl == 0xffffa001e0979f30 Fatal data abort: ... sp: ffff000000fb79b0 lr: ffff000000157ae0 (efirt_modevents + 94) elr: ffff000000157ae8 (efirt_modevents + 9c) spsr: 604000c5 far: ffffa001e0979f30 esr: 96000007 panic: vm_fault failed: ffff000000157ae8 error 1 cpuid = 0 time = 1 KDB: stack backtrace: db_trace_self() at db_trace_self db_trace_self_wrapper() at db_trace_self_wrapper+0x30 vpanic() at vpanic+0x174 panic() at panic+0x44 data_abort() at data_abort+0x2f0 handle_el1h_sync() at handle_el1h_sync+0x10 --- exception, esr 0x96000007 efirt_modevents() at efirt_modevents+0x9c module_register_init() at module_register_init+0xc4 mi_startup() at mi_startup+0x284 virtdone() at virtdone+0x7c
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