Removed old xen patchset

[people/pmueller/ipfire-2.x.git] / src / patches / suse-2.6.27.25 / patches.arch / ppc-altivec-VSX-ctxswitch

diff --git a/src/patches/suse-2.6.27.25/patches.arch/ppc-altivec-VSX-ctxswitch b/src/patches/suse-2.6.27.25/patches.arch/ppc-altivec-VSX-ctxswitch
deleted file mode 100644 (file)
index 982c098..0000000
--- a/src/patches/suse-2.6.27.25/patches.arch/ppc-altivec-VSX-ctxswitch
+++ /dev/null
@@ -1,68 +0,0 @@
-From: Michael Neuling <mikey@neuling.org>
-Subject: change giveup_fpu/altivec to disable VSX for current
-Patch-mainline: 2.6.30
-References: bnc#492324
-
-[PATCH] powerpc: change giveup_fpu/altivec to disable VSX for current
-
-When we call giveup_fpu, we need to need to turn off VSX in current.
-If we don't, on return to current it may execute a VSX instruction
-(before the next FP), and not have it's register state refreshed
-correctly from the thread_struct.  Ditto for altivec.
-
-This caused a bug where an unaligned lfs or stfs (which calls
-giveup_fpu so it can use the FPRs) to return to userspace with FP off
-but VSX on.  Then if a VSX instruction is executed, before another FP
-instruction, it will proceed without another exception and hence have
-the incorrect register state for VSX registers 0-31.
-
-   lfs unaligned   <- alignment exception turns FP off but leaves VSX on
-
-   VSX instruction <- no exception since VSX on, hence we get the
-                      wrong VSX register values for VSX registers 0-31
-                      (overlapping the FPRs)
-
-Signed-off-by: Michael Neuling <mikey@neuling.org>
-Acked-by: duwe@suse.de
-
----
- arch/powerpc/kernel/fpu.S     |    5 +++++
- arch/powerpc/kernel/misc_64.S |    8 ++++++++
- 2 files changed, 13 insertions(+)
-
-Index: clone3/arch/powerpc/kernel/fpu.S
-===================================================================
---- clone3.orig/arch/powerpc/kernel/fpu.S
-+++ clone3/arch/powerpc/kernel/fpu.S
-@@ -145,6 +145,11 @@ END_FTR_SECTION_IFSET(CPU_FTR_VSX)
-       beq     1f
-       PPC_LL  r4,_MSR-STACK_FRAME_OVERHEAD(r5)
-       li      r3,MSR_FP|MSR_FE0|MSR_FE1
-+#ifdef CONFIG_VSX
-+BEGIN_FTR_SECTION
-+      oris    r3,r3,MSR_VSX@h
-+END_FTR_SECTION_IFSET(CPU_FTR_VSX)
-+#endif
-       andc    r4,r4,r3                /* disable FP for previous task */
-       PPC_STL r4,_MSR-STACK_FRAME_OVERHEAD(r5)
- 1:
-Index: clone3/arch/powerpc/kernel/misc_64.S
-===================================================================
---- clone3.orig/arch/powerpc/kernel/misc_64.S
-+++ clone3/arch/powerpc/kernel/misc_64.S
-@@ -493,7 +493,15 @@ _GLOBAL(giveup_altivec)
-       stvx    vr0,r4,r3
-       beq     1f
-       ld      r4,_MSR-STACK_FRAME_OVERHEAD(r5)
-+#ifdef CONFIG_VSX
-+BEGIN_FTR_SECTION
-+      lis     r3,(MSR_VEC|MSR_VSX)@h
-+FTR_SECTION_ELSE
-+      lis     r3,MSR_VEC@h
-+ALT_FTR_SECTION_END_IFSET(CPU_FTR_VSX)
-+#else
-       lis     r3,MSR_VEC@h
-+#endif
-       andc    r4,r4,r3                /* disable FP for previous task */
-       std     r4,_MSR-STACK_FRAME_OVERHEAD(r5)
- 1: