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authorJordan Niethe <jniethe5@gmail.com>2020-05-06 06:40:31 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2020-05-18 17:10:37 +0300
commit94afd069d937d84fb4f696eb9a78db4084e43d21 (patch)
tree88f3f2fef60d56cd3b155762c378ac1fc05a5bd2 /arch/powerpc/include/asm/uprobes.h
parent217862d9b98bf08958d57fd7b31b9de0f1a9477d (diff)
downloadlinux-94afd069d937d84fb4f696eb9a78db4084e43d21.tar.xz
powerpc: Use a datatype for instructions
Currently unsigned ints are used to represent instructions on powerpc. This has worked well as instructions have always been 4 byte words. However, ISA v3.1 introduces some changes to instructions that mean this scheme will no longer work as well. This change is Prefixed Instructions. A prefixed instruction is made up of a word prefix followed by a word suffix to make an 8 byte double word instruction. No matter the endianness of the system the prefix always comes first. Prefixed instructions are only planned for powerpc64. Introduce a ppc_inst type to represent both prefixed and word instructions on powerpc64 while keeping it possible to exclusively have word instructions on powerpc32. Signed-off-by: Jordan Niethe <jniethe5@gmail.com> [mpe: Fix compile error in emulate_spe()] Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/20200506034050.24806-12-jniethe5@gmail.com
Diffstat (limited to 'arch/powerpc/include/asm/uprobes.h')
-rw-r--r--arch/powerpc/include/asm/uprobes.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/uprobes.h b/arch/powerpc/include/asm/uprobes.h
index 2bbdf27d09b5..7e3b329ba2d3 100644
--- a/arch/powerpc/include/asm/uprobes.h
+++ b/arch/powerpc/include/asm/uprobes.h
@@ -11,6 +11,7 @@
#include <linux/notifier.h>
#include <asm/probes.h>
+#include <asm/inst.h>
typedef ppc_opcode_t uprobe_opcode_t;
@@ -23,8 +24,8 @@ typedef ppc_opcode_t uprobe_opcode_t;
struct arch_uprobe {
union {
- u32 insn;
- u32 ixol;
+ struct ppc_inst insn;
+ struct ppc_inst ixol;
};
};