From: Peter Maydell <peter.maydell@linaro.org>
To: Gerd Hoffmann <kraxel@redhat.com>
Cc: "Thomas Huth" <thuth@redhat.com>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"Markus Armbruster" <armbru@redhat.com>,
qemu-devel@nongnu.org, qemu-arm <qemu-arm@nongnu.org>,
"Richard Henderson" <richard.henderson@linaro.org>,
"Mark Cave-Ayland" <mark.cave-ayland@ilande.co.uk>,
"Fabiano Rosas" <farosas@linux.ibm.com>,
muriloo@linux.ibm.com, "Paolo Bonzini" <pbonzini@redhat.com>,
"Philippe Mathieu-Daudé" <f4bug@amsat.org>,
"Daniel Henrique Barboza" <danielhb413@gmail.com>,
mopsfelder@gmail.com, qemu-ppc@nongnu.org,
"Cédric Le Goater" <clg@kaod.org>,
qemu-RISC-V <qemu-riscv@nongnu.org>
Subject: Re: QEMU 32-bit vs. 64-bit binaries
Date: Tue, 10 May 2022 13:25:21 +0100 [thread overview]
Message-ID: <CAFEAcA9FLSZzmMuvuUikq+2tPTQJhbqHzL125One2_DVpCjUvA@mail.gmail.com> (raw)
In-Reply-To: <20220510122056.l6deselsfipofnct@sirius.home.kraxel.org>
On Tue, 10 May 2022 at 13:21, Gerd Hoffmann <kraxel@redhat.com> wrote:
>
> Hi,
>
> > I'm not very familiar with KVM on ARM - but is it possible to use KVM there
> > with an arbitrary machine? If that's the case, a user might want to use KVM
> > on their 64-bit host to run a 32-bit guest machine, and then you need to
> > keep the 32-bit machines in the -aarch64 binary.
>
> 32-bit guest is 'qemu-system-aarch64 -machine virt -cpu host,aarch64=off'
> (and a aarch64 CPU which actually supports the armv7 instructions).
It's still armv8 even when it's 32-bit :-) The requirement is AArch32
support at EL1. (Some hardware has AArch32 support at EL0 only,
ie userspace but not kernel, which obviously isn't enough for 32-bit
KVM guests.)
-- PMM
next prev parent reply other threads:[~2022-05-10 12:27 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-04-29 23:31 [PATCH] mos6522: fix linking error when CONFIG_MOS6522 is not set Murilo Opsfelder Araujo
2022-05-02 9:43 ` Mark Cave-Ayland
2022-05-02 13:36 ` Murilo Opsfelder Araújo
2022-05-03 14:06 ` Fabiano Rosas
2022-05-04 7:16 ` Mark Cave-Ayland
2022-05-04 14:26 ` Fabiano Rosas
2022-05-04 14:48 ` Mark Cave-Ayland
2022-05-10 8:03 ` QEMU 32-bit vs. 64-bit binaries (was: [PATCH] mos6522: fix linking error when CONFIG_MOS6522 is not set) Thomas Huth
2022-05-10 8:26 ` Alistair Francis
2022-05-10 8:54 ` QEMU 32-bit vs. 64-bit binaries Markus Armbruster
2022-05-10 9:01 ` Thomas Huth
2022-05-10 9:14 ` Peter Maydell
2022-05-10 9:22 ` Dr. David Alan Gilbert
2022-05-10 9:31 ` Thomas Huth
2022-05-10 9:47 ` Peter Maydell
2022-05-10 10:14 ` BALATON Zoltan
2022-05-10 12:20 ` Gerd Hoffmann
2022-05-10 12:25 ` Peter Maydell [this message]
2022-05-04 7:10 ` [PATCH] mos6522: fix linking error when CONFIG_MOS6522 is not set Mark Cave-Ayland
2022-05-04 13:16 ` Murilo Opsfelder Araújo
2022-05-04 14:32 ` Mark Cave-Ayland
2022-05-05 1:24 ` Murilo Opsfelder Araújo
2022-05-05 8:19 ` Mark Cave-Ayland
2022-05-10 8:40 ` QEMU with reduced amount of machines in the config (was: [PATCH] mos6522: fix linking error when CONFIG_MOS6522 is not set) Thomas Huth
2022-05-06 23:44 ` [PATCH] mos6522: fix linking error when CONFIG_MOS6522 is not set Murilo Opsfelder Araújo
2022-05-08 9:30 ` Mark Cave-Ayland
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