Date: Wed, 29 Apr 2026 09:20:44 -0400 From: Mark Johnston <markj@freebsd.org> To: Andrew Turner <andrew@fubar.geek.nz> Cc: src-committers@freebsd.org, dev-commits-src-all@freebsd.org, dev-commits-src-main@freebsd.org, Harry Moulton <harry.moulton@arm.com> Subject: Re: git: 58de79153622 - main - arm64: mte: configure initial state for system registers Message-ID: <afIFrEPdpSpOqznT@nuc> In-Reply-To: <A04F2193-0FC7-418B-A5E6-DBB7767146E3@fubar.geek.nz> References: <69dcfc89.464ef.4e312925@gitrepo.freebsd.org> <afF1eUqL51aCjV-P@nuc> <A04F2193-0FC7-418B-A5E6-DBB7767146E3@fubar.geek.nz>
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On Wed, Apr 29, 2026 at 02:06:28PM +0100, Andrew Turner wrote: > > > > On 29 Apr 2026, at 04:05, Mark Johnston <markj@freebsd.org> wrote: > > > > On Mon, Apr 13, 2026 at 02:24:09PM +0000, Andrew Turner wrote: > >> The branch main has been updated by andrew: > >> > >> URL: https://cgit.FreeBSD.org/src/commit/?id=58de79153622145cb6fc57bc92c4de678876992f > >> > >> commit 58de79153622145cb6fc57bc92c4de678876992f > >> Author: Harry Moulton <harry.moulton@arm.com> > >> AuthorDate: 2026-04-13 11:54:38 +0000 > >> Commit: Andrew Turner <andrew@FreeBSD.org> > >> CommitDate: 2026-04-13 14:23:05 +0000 > >> > >> arm64: mte: configure initial state for system registers > >> > >> The fields in SCTLR_EL1 and HCR_EL2 for enabling MTE are set, and if the > >> ID_AA64PFR1_EL1 register shows MTE is present, the GCR_EL1 register is > >> also configured, and the two TFSR registers which hold pending tag check > >> faults are cleared. > >> > >> Reviewed by: andrew > >> Sponsored by: Arm Ltd > >> Signed-off-by: Harry Moulton <harry.moulton@arm.com> > >> Differential Revision: https://reviews.freebsd.org/D55946 > > > > After this commit I can't boot a FreeBSD aarch64 VM in qemu using "-cpu > > max": boot hangs shortly after the loader handoff. If I revert just > > this commit on the latest main, I'm able to boot. > > I guess only FEAT_MTE is enabled so the system registers aren’t supported. I’ve fixed it to check for FEAT_MTE2 in 2783fb7e7321. That fixes the problem for me, thank you.home | help
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