diff options
| author | Huacai Chen <chenhuacai@loongson.cn> | 2022-05-31 12:04:12 +0200 |
|---|---|---|
| committer | Huacai Chen <chenhuacai@loongson.cn> | 2022-06-03 14:09:29 +0200 |
| commit | 46859ac8af52ae599e1b51992ddef3eb43f295fc (patch) | |
| tree | c1e6640316d5d8748bea046b71d2260b81cbe314 /arch/loongarch/mm | |
| parent | LoongArch: Add VDSO and VSYSCALL support (diff) | |
| download | linux-46859ac8af52ae599e1b51992ddef3eb43f295fc.tar.xz linux-46859ac8af52ae599e1b51992ddef3eb43f295fc.zip | |
LoongArch: Add multi-processor (SMP) support
LoongArch-based procesors have 4, 8 or 16 cores per package. This patch
adds multi-processor (SMP) support for LoongArch.
Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'arch/loongarch/mm')
| -rw-r--r-- | arch/loongarch/mm/tlbex.S | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/arch/loongarch/mm/tlbex.S b/arch/loongarch/mm/tlbex.S index bef740710a3b..7eee40271577 100644 --- a/arch/loongarch/mm/tlbex.S +++ b/arch/loongarch/mm/tlbex.S @@ -88,7 +88,14 @@ vmalloc_done_load: slli.d t0, t0, _PTE_T_LOG2 add.d t1, ra, t0 +#ifdef CONFIG_SMP +smp_pgtable_change_load: +#endif +#ifdef CONFIG_SMP + ll.d t0, t1, 0 +#else ld.d t0, t1, 0 +#endif tlbsrch srli.d ra, t0, _PAGE_PRESENT_SHIFT @@ -96,7 +103,12 @@ vmalloc_done_load: beq ra, $r0, nopage_tlb_load ori t0, t0, _PAGE_VALID +#ifdef CONFIG_SMP + sc.d t0, t1, 0 + beq t0, $r0, smp_pgtable_change_load +#else st.d t0, t1, 0 +#endif ori t1, t1, 8 xori t1, t1, 8 ld.d t0, t1, 0 @@ -120,14 +132,24 @@ vmalloc_load: * spots a huge page. */ tlb_huge_update_load: +#ifdef CONFIG_SMP + ll.d t0, t1, 0 +#else ld.d t0, t1, 0 +#endif srli.d ra, t0, _PAGE_PRESENT_SHIFT andi ra, ra, 1 beq ra, $r0, nopage_tlb_load tlbsrch ori t0, t0, _PAGE_VALID +#ifdef CONFIG_SMP + sc.d t0, t1, 0 + beq t0, $r0, tlb_huge_update_load + ld.d t0, t1, 0 +#else st.d t0, t1, 0 +#endif addu16i.d t1, $r0, -(CSR_TLBIDX_EHINV >> 16) addi.d ra, t1, 0 csrxchg ra, t1, LOONGARCH_CSR_TLBIDX @@ -173,6 +195,7 @@ tlb_huge_update_load: csrxchg t1, t0, LOONGARCH_CSR_TLBIDX nopage_tlb_load: + dbar 0 csrrd ra, EXCEPTION_KS2 la.abs t0, tlb_do_page_fault_0 jirl $r0, t0, 0 @@ -229,7 +252,14 @@ vmalloc_done_store: slli.d t0, t0, _PTE_T_LOG2 add.d t1, ra, t0 +#ifdef CONFIG_SMP +smp_pgtable_change_store: +#endif +#ifdef CONFIG_SMP + ll.d t0, t1, 0 +#else ld.d t0, t1, 0 +#endif tlbsrch srli.d ra, t0, _PAGE_PRESENT_SHIFT @@ -238,7 +268,12 @@ vmalloc_done_store: bne ra, $r0, nopage_tlb_store ori t0, t0, (_PAGE_VALID | _PAGE_DIRTY | _PAGE_MODIFIED) +#ifdef CONFIG_SMP + sc.d t0, t1, 0 + beq t0, $r0, smp_pgtable_change_store +#else st.d t0, t1, 0 +#endif ori t1, t1, 8 xori t1, t1, 8 @@ -263,7 +298,11 @@ vmalloc_store: * spots a huge page. */ tlb_huge_update_store: +#ifdef CONFIG_SMP + ll.d t0, t1, 0 +#else ld.d t0, t1, 0 +#endif srli.d ra, t0, _PAGE_PRESENT_SHIFT andi ra, ra, ((_PAGE_PRESENT | _PAGE_WRITE) >> _PAGE_PRESENT_SHIFT) xori ra, ra, ((_PAGE_PRESENT | _PAGE_WRITE) >> _PAGE_PRESENT_SHIFT) @@ -272,7 +311,13 @@ tlb_huge_update_store: tlbsrch ori t0, t0, (_PAGE_VALID | _PAGE_DIRTY | _PAGE_MODIFIED) +#ifdef CONFIG_SMP + sc.d t0, t1, 0 + beq t0, $r0, tlb_huge_update_store + ld.d t0, t1, 0 +#else st.d t0, t1, 0 +#endif addu16i.d t1, $r0, -(CSR_TLBIDX_EHINV >> 16) addi.d ra, t1, 0 csrxchg ra, t1, LOONGARCH_CSR_TLBIDX @@ -318,6 +363,7 @@ tlb_huge_update_store: csrxchg t1, t0, LOONGARCH_CSR_TLBIDX nopage_tlb_store: + dbar 0 csrrd ra, EXCEPTION_KS2 la.abs t0, tlb_do_page_fault_1 jirl $r0, t0, 0 @@ -373,7 +419,14 @@ vmalloc_done_modify: slli.d t0, t0, _PTE_T_LOG2 add.d t1, ra, t0 +#ifdef CONFIG_SMP +smp_pgtable_change_modify: +#endif +#ifdef CONFIG_SMP + ll.d t0, t1, 0 +#else ld.d t0, t1, 0 +#endif tlbsrch srli.d ra, t0, _PAGE_WRITE_SHIFT @@ -381,7 +434,12 @@ vmalloc_done_modify: beq ra, $r0, nopage_tlb_modify ori t0, t0, (_PAGE_VALID | _PAGE_DIRTY | _PAGE_MODIFIED) +#ifdef CONFIG_SMP + sc.d t0, t1, 0 + beq t0, $r0, smp_pgtable_change_modify +#else st.d t0, t1, 0 +#endif ori t1, t1, 8 xori t1, t1, 8 ld.d t0, t1, 0 @@ -405,7 +463,11 @@ vmalloc_modify: * build_tlbchange_handler_head spots a huge page. */ tlb_huge_update_modify: +#ifdef CONFIG_SMP + ll.d t0, t1, 0 +#else ld.d t0, t1, 0 +#endif srli.d ra, t0, _PAGE_WRITE_SHIFT andi ra, ra, 1 @@ -414,7 +476,13 @@ tlb_huge_update_modify: tlbsrch ori t0, t0, (_PAGE_VALID | _PAGE_DIRTY | _PAGE_MODIFIED) +#ifdef CONFIG_SMP + sc.d t0, t1, 0 + beq t0, $r0, tlb_huge_update_modify + ld.d t0, t1, 0 +#else st.d t0, t1, 0 +#endif /* * A huge PTE describes an area the size of the * configured huge page size. This is twice the @@ -454,6 +522,7 @@ tlb_huge_update_modify: csrxchg t1, t0, LOONGARCH_CSR_TLBIDX nopage_tlb_modify: + dbar 0 csrrd ra, EXCEPTION_KS2 la.abs t0, tlb_do_page_fault_1 jirl $r0, t0, 0 |