Commit ca5d2564 authored Feb 10, 2015 by James Hogan Committed by Ralf Baechle Feb 19, 2015

MIPS: Export MSA functions used by lose_fpu(1) for KVM



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 f798217d ("KVM: MIPS: Don't leak
FPU/DSP to guest"):

ERROR: "_save_msa" [arch/mips/kvm/kvm.ko] undefined!

Fixes: f798217d (KVM: MIPS: Don't leak FPU/DSP to guest)
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: <stable@vger.kernel.org> # 3.15+
Patchwork: https://patchwork.linux-mips.org/patch/9261/


Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

parent 3ce465e0

arch/mips/kernel/mips_ksyms.c

+4 −0

Original line number	Original line	Diff line number	Diff line
	@@ -15,6 +15,7 @@
	#include <asm/uaccess.h>		#include <asm/uaccess.h>
	#include <asm/ftrace.h>		#include <asm/ftrace.h>
	#include <asm/fpu.h>		#include <asm/fpu.h>
			#include <asm/msa.h>

	extern void __bzero(void __s, size_t __count);		extern void __bzero(void __s, size_t __count);
	extern long __strncpy_from_kernel_nocheck_asm(char *__to,		extern long __strncpy_from_kernel_nocheck_asm(char *__to,
	@@ -36,6 +37,9 @@ extern long __strnlen_user_asm(const char *s);
	* Core architecture code		* Core architecture code
	*/		*/
	EXPORT_SYMBOL_GPL(_save_fp);		EXPORT_SYMBOL_GPL(_save_fp);
			#ifdef CONFIG_CPU_HAS_MSA
			EXPORT_SYMBOL_GPL(_save_msa);
			#endif

	/*		/*
	* String functions		* String functions