diff mbox series

[kvm-unit-tests,v3,1/2] riscv: Add RV_INSN_LEN to processor.h

Message ID 20250605161806.1206850-1-jesse@rivosinc.com
State New
Headers show
Series [kvm-unit-tests,v3,1/2] riscv: Add RV_INSN_LEN to processor.h | expand

Commit Message

Jesse Taube June 5, 2025, 4:18 p.m. UTC 
When handeling traps and faults it is offten necessary to know the size
of the instruction at epc. Add RV_INSN_LEN to calculate the
instruction size.

Signed-off-by: Jesse Taube <jesse@rivosinc.com>
---
 lib/riscv/asm/processor.h | 2 ++
 1 file changed, 2 insertions(+)
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Patch

diff --git a/lib/riscv/asm/processor.h b/lib/riscv/asm/processor.h
index 40104272..631ce226 100644
--- a/lib/riscv/asm/processor.h
+++ b/lib/riscv/asm/processor.h
@@ -7,6 +7,8 @@ 
 #define EXCEPTION_CAUSE_MAX	24
 #define INTERRUPT_CAUSE_MAX	16
 
+#define RV_INSN_LEN(insn)		((((insn) & 0x3) < 0x3) ? 2 : 4)
+
 typedef void (*exception_fn)(struct pt_regs *);
 
 struct thread_info {