On Mon, Feb 06, 2023 at 12:19:40PM +0000, Richard W.M. Jones wrote:
> RHEL >= 9 and compatible distros like Rocky >= 9 will not boot using
> the default qemu CPU. You will see an error at boot:
>
> Fatal glibc error: CPU does not support x86-64-v2
>
> Instead you need to use -cpu host.
>
> In commit f28757c6d1 ("convert_linux: set "gcaps_default_cpu = false"
> for x86_64 RHEL-9.0+ guests") we fixed this specifically for RHEL >= 9.
>
> This commit extends the same fix to all RHEL family distros.
If v2v is going to use host CPU for a bunch of distros, why not use
it for all distros ? What's the downside in -cpu host, instead of
the default qemu64 CPU ?
Even if the distro doesn't require x86_64-v2 ABI, they'll pretty much
all benefit from NOT using the default QEMU CPU model, if only for
the fact that they gain the 'aesni' feature which increases crypto
performance massively.
>
> Updates: commit f28757c6d100060c65212ea55cfa59d308dcb850
> Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=2166619
> Reported-by: Ming Xie
> Thanks: Laszlo Ersek
> ---
> convert/convert_linux.ml | 4 ++--
> 1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/convert/convert_linux.ml b/convert/convert_linux.ml
> index e20cafa551..460cbff0ed 100644
> --- a/convert/convert_linux.ml
> +++ b/convert/convert_linux.ml
> @@ -201,9 +201,9 @@ let convert (g : G.guestfs) source inspect i_firmware
> keep_serial_console _ =
>
> (* RHEL >= 9.0 on x86_64 requires the processor to support the
> "x86-64-v2"
> * microarchitecture level, which the default QEMU VCPU model does not
> - * satisfy. Refer to RHBZ#2076013.
> + * satisfy. Refer to RHBZ#2076013 RHBZ#2166619.
> *)
> - let default_cpu_suffices = inspect.i_distro <> "rhel" ||
> + let default_cpu_suffices = family <> `RHEL_family ||
> inspect.i_arch <> "x86_64" ||
> inspect.i_major_version < 9 in
>
> --
> 2.39.0
>
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>
With regards,
Daniel
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