This is a note to let you know that I've just added the patch titled
MIPS: Export MSA functions used by lose_fpu(1) for KVM
to the 3.19-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-export-msa-functions-used-by-lose_fpu-1-for-kvm.patch
and it can be found in the queue-3.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From ca5d25642e212f73492d332d95dc90ef46a0e8dc Mon Sep 17 00:00:00 2001
From: James Hogan <james.hogan@xxxxxxxxxx>
Date: Tue, 10 Feb 2015 10:03:00 +0000
Subject: MIPS: Export MSA functions used by lose_fpu(1) for KVM
From: James Hogan <james.hogan@xxxxxxxxxx>
commit ca5d25642e212f73492d332d95dc90ef46a0e8dc upstream.
Export the _save_msa asm function used by the lose_fpu(1) macro to GPL
modules so that KVM can make use of it when it is built as a module.
This fixes the following build error when CONFIG_KVM=m and
CONFIG_CPU_HAS_MSA=y due to commit f798217dfd03 ("KVM: MIPS: Don't leak
FPU/DSP to guest"):
ERROR: "_save_msa" [arch/mips/kvm/kvm.ko] undefined!
Fixes: f798217dfd03 (KVM: MIPS: Don't leak FPU/DSP to guest)
Signed-off-by: James Hogan <james.hogan@xxxxxxxxxx>
Cc: Paolo Bonzini <pbonzini@xxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Paul Burton <paul.burton@xxxxxxxxxx>
Cc: Gleb Natapov <gleb@xxxxxxxxxx>
Cc: kvm@xxxxxxxxxxxxxxx
Cc: linux-mips@xxxxxxxxxxxxxx
Patchwork: https://patchwork.linux-mips.org/patch/9261/
Signed-off-by: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
arch/mips/kernel/mips_ksyms.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/arch/mips/kernel/mips_ksyms.c
+++ b/arch/mips/kernel/mips_ksyms.c
@@ -15,6 +15,7 @@
#include <asm/uaccess.h>
#include <asm/ftrace.h>
#include <asm/fpu.h>
+#include <asm/msa.h>
extern void *__bzero(void *__s, size_t __count);
extern long __strncpy_from_kernel_nocheck_asm(char *__to,
@@ -36,6 +37,9 @@ extern long __strnlen_user_asm(const cha
* Core architecture code
*/
EXPORT_SYMBOL_GPL(_save_fp);
+#ifdef CONFIG_CPU_HAS_MSA
+EXPORT_SYMBOL_GPL(_save_msa);
+#endif
/*
* String functions
Patches currently in stable-queue which might be from james.hogan@xxxxxxxxxx are
queue-3.19/kvm-mips-disable-htw-while-in-guest.patch
queue-3.19/kvm-mips-don-t-leak-fpu-dsp-to-guest.patch
queue-3.19/mips-export-msa-functions-used-by-lose_fpu-1-for-kvm.patch
queue-3.19/mm-hugetlb-pmd_huge-returns-true-for-non-present-hugepage.patch
queue-3.19/mips-export-fp-functions-used-by-lose_fpu-1-for-kvm.patch
queue-3.19/rc-main-re-apply-filter-for-no-op-protocol-change.patch
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