From: <gregkh@linuxfoundation.org>
To: james.hogan@imgtec.com, gregkh@linuxfoundation.org, ralf@linux-mips.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "MIPS: Fix KVM guest fixmap address" has been added to the 4.1-stable tree
Date: Wed, 08 Jul 2015 00:24:21 -0700 [thread overview]
Message-ID: <143634026115059@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
MIPS: Fix KVM guest fixmap address
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
mips-fix-kvm-guest-fixmap-address.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From 8e748c8d09a9314eedb5c6367d9acfaacddcdc88 Mon Sep 17 00:00:00 2001
From: James Hogan <james.hogan@imgtec.com>
Date: Mon, 27 Apr 2015 15:07:16 +0100
Subject: MIPS: Fix KVM guest fixmap address
From: James Hogan <james.hogan@imgtec.com>
commit 8e748c8d09a9314eedb5c6367d9acfaacddcdc88 upstream.
KVM guest kernels for trap & emulate run in user mode, with a modified
set of kernel memory segments. However the fixmap address is still in
the normal KSeg3 region at 0xfffe0000 regardless, causing problems when
cache alias handling makes use of them when handling copy on write.
Therefore define FIXADDR_TOP as 0x7ffe0000 in the guest kernel mapped
region when CONFIG_KVM_GUEST is defined.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/9887/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
arch/mips/include/asm/mach-generic/spaces.h | 4 ++++
1 file changed, 4 insertions(+)
--- a/arch/mips/include/asm/mach-generic/spaces.h
+++ b/arch/mips/include/asm/mach-generic/spaces.h
@@ -94,7 +94,11 @@
#endif
#ifndef FIXADDR_TOP
+#ifdef CONFIG_KVM_GUEST
+#define FIXADDR_TOP ((unsigned long)(long)(int)0x7ffe0000)
+#else
#define FIXADDR_TOP ((unsigned long)(long)(int)0xfffe0000)
#endif
+#endif
#endif /* __ASM_MACH_GENERIC_SPACES_H */
Patches currently in stable-queue which might be from james.hogan@imgtec.com are
queue-4.1/mips-fix-kvm-guest-fixmap-address.patch
queue-4.1/kvm-mips-use-id_to_memslot-correctly.patch
reply other threads:[~2015-07-08 7:24 UTC|newest]
Thread overview: [no followups] expand[flat|nested] mbox.gz Atom feed
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=143634026115059@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=james.hogan@imgtec.com \
--cc=ralf@linux-mips.org \
--cc=stable-commits@vger.kernel.org \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).