There are multiple decodings for the "dcbt" mnemonic, so the assembler
has to pick one.
That requires passing -many to the assembler, which is not recommended.
Without -many the clang 14 / binutils 2.38 build fails with:
arch/powerpc/kernel/exceptions-64s.S:2976: Error: junk at end of line:
`0b01010'
clang: error: assembler command failed with exit code 1 (use -v to see
invocation)
Fix it by adding .machine directives around the use of dcbt to specify
which encoding is desired.
Signed-off-by: Michael Ellerman <m...@ellerman.id.au>
---
arch/powerpc/include/asm/ppc_asm.h | 10 ++++++++--
1 file changed, 8 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/include/asm/ppc_asm.h
b/arch/powerpc/include/asm/ppc_asm.h
index 78c7548eac1e..1d1018c1e482 100644
--- a/arch/powerpc/include/asm/ppc_asm.h
+++ b/arch/powerpc/include/asm/ppc_asm.h
@@ -508,11 +508,16 @@ END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG,
CPU_FTR_CELL_TB_BUG, 96)
*/
#define DCBT_BOOK3S_STOP_ALL_STREAM_IDS(scratch) \
lis scratch,0x60000000@h; \
- dcbt 0,scratch,0b01010
+ .machine push; \
+ .machine power4; \
+ dcbt 0,scratch,0b01010; \
+ .machine pop;
#define DCBT_SETUP_STREAMS(from, from_parms, to, to_parms, scratch) \
lis scratch,0x8000; /* GO=1 */ \
clrldi scratch,scratch,32; \
+ .machine push; \
+ .machine power4; \
/* setup read stream 0 */ \
dcbt 0,from,0b01000; /* addr from */ \
dcbt 0,from_parms,0b01010; /* length and depth from */ \
@@ -520,7 +525,8 @@ END_FTR_SECTION_NESTED(CPU_FTR_CELL_TB_BUG,
CPU_FTR_CELL_TB_BUG, 96)
dcbtst 0,to,0b01000; /* addr to */ \
dcbtst 0,to_parms,0b01010; /* length and depth to */ \
eieio; \
- dcbt 0,scratch,0b01010; /* all streams GO */
+ dcbt 0,scratch,0b01010; /* all streams GO */ \
+ .machine pop;
/*
* toreal/fromreal/tophys/tovirt macros. 32-bit BookE makes them
--
2.43.2
