From: Boris Ostrovsky <boris.ostrovsky@oracle.com>
To: Juergen Gross <jgross@suse.com>,
linux-kernel@vger.kernel.org, x86@kernel.org
Cc: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
Dave Hansen <dave.hansen@linux.intel.com>,
"H. Peter Anvin" <hpa@zytor.com>,
xen-devel@lists.xenproject.org
Subject: Re: [PATCH] x86/xen: fix secondary processor fpu initialization
Date: Mon, 3 Jul 2023 13:51:57 -0400 [thread overview]
Message-ID: <573ce7fa-d64f-7351-b64d-01692fc87512@oracle.com> (raw)
In-Reply-To: <20230703130032.22916-1-jgross@suse.com>
On 7/3/23 9:00 AM, Juergen Gross wrote:
> Moving the call of fpu__init_cpu() from cpu_init() to start_secondary()
> broke Xen PV guests, as those don't call start_secondary() for APs.
>
> Fix that by adding the call of fpu__init_cpu() to cpu_bringup(), which
> is the Xen PV replacement of start_secondary().
>
> Fixes: b81fac906a8f ("x86/fpu: Move FPU initialization into arch_cpu_finalize_init()")
> Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
next prev parent reply other threads:[~2023-07-03 17:52 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-07-03 13:00 Juergen Gross
2023-07-03 17:51 ` Boris Ostrovsky [this message]
2023-07-04 5:42 ` Juergen Gross
2023-07-05 10:40 ` [tip: x86/urgent] x86/xen: Fix secondary processors' FPU initialization tip-bot2 for Juergen Gross
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