VSX bit is enabled by default for Power7 and Power8 CPU models,
so we need to disable them in order to avoid instruction exceptions.
Kernel will activate it when necessary.
* grub-core/kern/powerpc/ieee1275/startup.S: Disable VSX.
Also-By: Adhemerval Zanella <azane...@linux.vnet.ibm.com>
---
ChangeLog | 10 ++++++++++
grub-core/kern/powerpc/ieee1275/startup.S | 10 ++++++++++
2 files changed, 20 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index 192e8bc..c1b0637 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,13 @@
+2014-09-25 Paulo Flabiano Smroigo <pfsmor...@linux.vnet.ibm.com>
+
+ Disable VSX instruction
+
+ VSX bit is enabled by default for Power7 and Power8 CPU models, so we
+ need to disable them in order to avoid instruction exceptions. Kernel
+ will activate it when necessary.
+
+ * grub-core/kern/powerpc/ieee1275/startup.S: Disable VSX.
+
2014-09-25 Colin Watson <cjwat...@ubuntu.com>
Fix in-tree --platform=none
diff --git a/grub-core/kern/powerpc/ieee1275/startup.S
b/grub-core/kern/powerpc/ieee1275/startup.S
index 21c884b..c4621a6 100644
--- a/grub-core/kern/powerpc/ieee1275/startup.S
+++ b/grub-core/kern/powerpc/ieee1275/startup.S
@@ -20,6 +20,8 @@
#include <grub/symbol.h>
#include <grub/offsets.h>
+#define MSR_VSX 0x80
+
.extern __bss_start
.extern _end
@@ -28,6 +30,14 @@
.globl start, _start
start:
_start:
+ _start:
+
+ /* Disable VSX instruction */
+ mfmsr 0
+ oris 0,0,MSR_VSX
+ mtmsrd 0
+ isync
+
li 2, 0
li 13, 0
--
1.8.1.4
--
Paulo Flabiano Smorigo
IBM Linux Technology Center
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