[kvm-unit-tests PATCH v7 3/6] riscv: Use asm-offsets to generate SBI_EXT_HSM values

[Clément Léger]

Replace hardcoded values with generated ones using sbi-asm-offset. This
allows to directly use ASM_SBI_EXT_HSM and ASM_SBI_EXT_HSM_STOP in
assembly.

Signed-off-by: Clément Léger <cleger at rivosinc.com>
Reviewed-by: Andrew Jones <andrew.jones at linux.dev>
---
 riscv/Makefile          |  2 +-
 riscv/sbi-asm.S         |  6 ++++--
 riscv/sbi-asm-offsets.c | 11 +++++++++++
 riscv/.gitignore        |  1 +
 4 files changed, 17 insertions(+), 3 deletions(-)
 create mode 100644 riscv/sbi-asm-offsets.c
 create mode 100644 riscv/.gitignore

diff --git a/riscv/Makefile b/riscv/Makefile
index ae9cf02a..02d2ac39 100644
--- a/riscv/Makefile
+++ b/riscv/Makefile
@@ -87,7 +87,7 @@ CFLAGS += -ffreestanding
 CFLAGS += -O2
 CFLAGS += -I $(SRCDIR)/lib -I $(SRCDIR)/lib/libfdt -I lib -I $(SRCDIR)/riscv
 
-asm-offsets = lib/riscv/asm-offsets.h
+asm-offsets = lib/riscv/asm-offsets.h riscv/sbi-asm-offsets.h
 include $(SRCDIR)/scripts/asm-offsets.mak
 
 .PRECIOUS: %.aux.o
diff --git a/riscv/sbi-asm.S b/riscv/sbi-asm.S
index 923c2cec..b9c2696f 100644
--- a/riscv/sbi-asm.S
+++ b/riscv/sbi-asm.S
@@ -7,6 +7,8 @@
 #define __ASSEMBLY__
 #include <asm/asm.h>
 #include <asm/csr.h>
+#include <asm/asm-offsets.h>
+#include <generated/sbi-asm-offsets.h>
 
 #include "sbi-tests.h"
 
@@ -58,8 +60,8 @@ sbi_hsm_check:
 7:	lb	t0, 0(t1)
 	pause
 	beqz	t0, 7b
-	li	a7, 0x48534d	/* SBI_EXT_HSM */
-	li	a6, 1		/* SBI_EXT_HSM_HART_STOP */
+	li	a7, ASM_SBI_EXT_HSM
+	li	a6, ASM_SBI_EXT_HSM_HART_STOP
 	ecall
 8:	pause
 	j	8b
diff --git a/riscv/sbi-asm-offsets.c b/riscv/sbi-asm-offsets.c
new file mode 100644
index 00000000..bd37b6a2
--- /dev/null
+++ b/riscv/sbi-asm-offsets.c
@@ -0,0 +1,11 @@
+// SPDX-License-Identifier: GPL-2.0-only
+#include <kbuild.h>
+#include <asm/sbi.h>
+
+int main(void)
+{
+	DEFINE(ASM_SBI_EXT_HSM, SBI_EXT_HSM);
+	DEFINE(ASM_SBI_EXT_HSM_HART_STOP, SBI_EXT_HSM_HART_STOP);
+
+	return 0;
+}
diff --git a/riscv/.gitignore b/riscv/.gitignore
new file mode 100644
index 00000000..0a8c5a36
--- /dev/null
+++ b/riscv/.gitignore
@@ -0,0 +1 @@
+/*-asm-offsets.[hs]
-- 
2.47.2