From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To: linux-kernel@vger.kernel.org
Cc: Juergen Gross <jgross@suse.com>,
One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>,
Henrique de Moraes Holschuh <hmh@hmh.eng.br>,
Peter Zijlstra <peterz@infradead.org>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
stable@vger.kernel.org, Matthew Whitehead <tedheadster@gmail.com>,
Andrew Cooper <andrew.cooper3@citrix.com>,
Borislav Petkov <bp@alien8.de>, Andy Lutomirski <luto@kernel.org>,
Brian Gerst <brgerst@gmail.com>,
Boris Ostrovsky <boris.ostrovsky@oracle.com>,
xen-devel <Xen-devel@lists.xen.org>,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 3.18 20/52] x86/asm/32: Make sync_core() handle missing CPUID on all 32-bit kernels
Date: Mon, 29 Jan 2018 13:56:38 +0100 [thread overview]
Message-ID: <20180129123629.080490214@linuxfoundation.org> (raw)
In-Reply-To: <20180129123628.168904217@linuxfoundation.org>
3.18-stable review patch. If anyone has any objections, please let me know.
------------------
From: Andy Lutomirski <luto@kernel.org>
commit 1c52d859cb2d417e7216d3e56bb7fea88444cec9 upstream.
We support various non-Intel CPUs that don't have the CPUID
instruction, so the M486 test was wrong. For now, fix it with a big
hammer: handle missing CPUID on all 32-bit CPUs.
Reported-by: One Thousand Gnomes <gnomes@lxorguk.ukuu.org.uk>
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Matthew Whitehead <tedheadster@gmail.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Henrique de Moraes Holschuh <hmh@hmh.eng.br>
Cc: Andrew Cooper <andrew.cooper3@citrix.com>
Cc: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Cc: xen-devel <Xen-devel@lists.xen.org>
Link: http://lkml.kernel.org/r/685bd083a7c036f7769510b6846315b17d6ba71f.1481307769.git.luto@kernel.org
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/x86/include/asm/processor.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/x86/include/asm/processor.h
+++ b/arch/x86/include/asm/processor.h
@@ -669,7 +669,7 @@ static inline void sync_core(void)
{
int tmp;
-#ifdef CONFIG_M486
+#ifdef CONFIG_X86_32
/*
* Do a CPUID if available, otherwise do a jump. The jump
* can conveniently enough be the jump around CPUID.
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parent reply other threads:[~2018-01-29 12:56 UTC|newest]
Thread overview: expand[flat|nested] mbox.gz Atom feed
[parent not found: <20180129123628.168904217@linuxfoundation.org>]
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