linux-kernel - [PATCH v5 3/5] LoongArch: Add la

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Date:   Fri, 17 Feb 2023 15:26:27 +0800
From:   Youling Tang <tangyouling@...ngson.cn>
To:     Huacai Chen <chenhuacai@...nel.org>,
        Xi Ruoyao <xry111@...111.site>,
        Jinyang He <hejinyang@...ngson.cn>
Cc:     Xuerui Wang <kernel@...0n.name>, loongarch@...ts.linux.dev,
        linux-kernel@...r.kernel.org
Subject: [PATCH v5 3/5] LoongArch: Add la_abs macro implementation

Use the "la_abs macro" instead of the "la.abs pseudo instruction" to prepare
for the subsequent PIE kernel. When PIE is not enabled, la_abs is equivalent
to la.abs.

Signed-off-by: Youling Tang <tangyouling@...ngson.cn>
---
 arch/loongarch/include/asm/asmmacro.h   |  4 ++++
 arch/loongarch/include/asm/stackframe.h |  2 +-
 arch/loongarch/kernel/genex.S           |  8 ++++----
 arch/loongarch/mm/tlbex.S               | 14 +++++++-------
 4 files changed, 16 insertions(+), 12 deletions(-)

diff --git a/arch/loongarch/include/asm/asmmacro.h b/arch/loongarch/include/asm/asmmacro.h
index 328bb956f241..adc92464afa6 100644
--- a/arch/loongarch/include/asm/asmmacro.h
+++ b/arch/loongarch/include/asm/asmmacro.h
@@ -667,4 +667,8 @@
 	nor	\dst, \src, zero
 .endm
 
+.macro la_abs reg, sym
+	la.abs \reg, \sym
+.endm
+
 #endif /* _ASM_ASMMACRO_H */
diff --git a/arch/loongarch/include/asm/stackframe.h b/arch/loongarch/include/asm/stackframe.h
index 855c9d9e3210..3e1cf97f56e6 100644
--- a/arch/loongarch/include/asm/stackframe.h
+++ b/arch/loongarch/include/asm/stackframe.h
@@ -78,7 +78,7 @@
  * new value in sp.
  */
 	.macro	get_saved_sp docfi=0
-	la.abs	  t1, kernelsp
+	la_abs	  t1, kernelsp
 #ifdef CONFIG_SMP
 	csrrd	  t0, PERCPU_BASE_KS
 	LONG_ADD  t1, t1, t0
diff --git a/arch/loongarch/kernel/genex.S b/arch/loongarch/kernel/genex.S
index 7e5c293ed89f..44ff1ff64260 100644
--- a/arch/loongarch/kernel/genex.S
+++ b/arch/loongarch/kernel/genex.S
@@ -34,7 +34,7 @@ SYM_FUNC_END(__arch_cpu_idle)
 SYM_FUNC_START(handle_vint)
 	BACKUP_T0T1
 	SAVE_ALL
-	la.abs	t1, __arch_cpu_idle
+	la_abs	t1, __arch_cpu_idle
 	LONG_L	t0, sp, PT_ERA
 	/* 32 byte rollback region */
 	ori	t0, t0, 0x1f
@@ -43,7 +43,7 @@ SYM_FUNC_START(handle_vint)
 	LONG_S	t0, sp, PT_ERA
 1:	move	a0, sp
 	move	a1, sp
-	la.abs	t0, do_vint
+	la_abs	t0, do_vint
 	jirl	ra, t0, 0
 	RESTORE_ALL_AND_RET
 SYM_FUNC_END(handle_vint)
@@ -72,7 +72,7 @@ SYM_FUNC_END(except_vec_cex)
 	SAVE_ALL
 	build_prep_\prep
 	move	a0, sp
-	la.abs	t0, do_\handler
+	la_abs	t0, do_\handler
 	jirl	ra, t0, 0
 	668:
 	RESTORE_ALL_AND_RET
@@ -93,6 +93,6 @@ SYM_FUNC_END(except_vec_cex)
 	BUILD_HANDLER reserved reserved none	/* others */
 
 SYM_FUNC_START(handle_sys)
-	la.abs	t0, handle_syscall
+	la_abs	t0, handle_syscall
 	jr	t0
 SYM_FUNC_END(handle_sys)
diff --git a/arch/loongarch/mm/tlbex.S b/arch/loongarch/mm/tlbex.S
index 3dd2a9615cd9..244e2f5aeee5 100644
--- a/arch/loongarch/mm/tlbex.S
+++ b/arch/loongarch/mm/tlbex.S
@@ -39,7 +39,7 @@ SYM_FUNC_START(handle_tlb_protect)
 	move		a1, zero
 	csrrd		a2, LOONGARCH_CSR_BADV
 	REG_S		a2, sp, PT_BVADDR
-	la.abs		t0, do_page_fault
+	la_abs		t0, do_page_fault
 	jirl		ra, t0, 0
 	RESTORE_ALL_AND_RET
 SYM_FUNC_END(handle_tlb_protect)
@@ -115,7 +115,7 @@ smp_pgtable_change_load:
 
 #ifdef CONFIG_64BIT
 vmalloc_load:
-	la.abs		t1, swapper_pg_dir
+	la_abs		t1, swapper_pg_dir
 	b		vmalloc_done_load
 #endif
 
@@ -186,7 +186,7 @@ tlb_huge_update_load:
 nopage_tlb_load:
 	dbar		0
 	csrrd		ra, EXCEPTION_KS2
-	la.abs		t0, tlb_do_page_fault_0
+	la_abs		t0, tlb_do_page_fault_0
 	jr		t0
 SYM_FUNC_END(handle_tlb_load)
 
@@ -262,7 +262,7 @@ smp_pgtable_change_store:
 
 #ifdef CONFIG_64BIT
 vmalloc_store:
-	la.abs		t1, swapper_pg_dir
+	la_abs		t1, swapper_pg_dir
 	b		vmalloc_done_store
 #endif
 
@@ -335,7 +335,7 @@ tlb_huge_update_store:
 nopage_tlb_store:
 	dbar		0
 	csrrd		ra, EXCEPTION_KS2
-	la.abs		t0, tlb_do_page_fault_1
+	la_abs		t0, tlb_do_page_fault_1
 	jr		t0
 SYM_FUNC_END(handle_tlb_store)
 
@@ -410,7 +410,7 @@ smp_pgtable_change_modify:
 
 #ifdef CONFIG_64BIT
 vmalloc_modify:
-	la.abs		t1, swapper_pg_dir
+	la_abs		t1, swapper_pg_dir
 	b		vmalloc_done_modify
 #endif
 
@@ -482,7 +482,7 @@ tlb_huge_update_modify:
 nopage_tlb_modify:
 	dbar		0
 	csrrd		ra, EXCEPTION_KS2
-	la.abs		t0, tlb_do_page_fault_1
+	la_abs		t0, tlb_do_page_fault_1
 	jr		t0
 SYM_FUNC_END(handle_tlb_modify)
 
-- 
2.37.3