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From: Alexandre Ghiti <alex@ghiti.fr>
To: Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Alexandre Ghiti <alex@ghiti.fr>
Subject: [PATCH 4/5] riscv: Simplify BUILTIN_DTB device tree mapping handling
Date: Fri, 23 Jul 2021 15:01:27 +0200	[thread overview]
Message-ID: <20210723130128.47664-5-alex@ghiti.fr> (raw)
In-Reply-To: <20210723130128.47664-1-alex@ghiti.fr>

__PAGETABLE_PMD_FOLDED defines a 2-level page table that is only used in
32-bit kernel, so there is no need to check for CONFIG_64BIT in #ifndef
__PAGETABLE_PMD_FOLDED and vice-versa.

Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
---
 arch/riscv/mm/init.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 6b29c5791555..1b30ad7e3ebc 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -614,18 +614,14 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
 			   pa + PMD_SIZE, PMD_SIZE, PAGE_KERNEL);
 	dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PMD_SIZE - 1));
 #else /* CONFIG_BUILTIN_DTB */
-#ifdef CONFIG_64BIT
 	/*
 	 * __va can't be used since it would return a linear mapping address
 	 * whereas dtb_early_va will be used before setup_vm_final installs
 	 * the linear mapping.
 	 */
 	dtb_early_va = kernel_mapping_pa_to_va(XIP_FIXUP(dtb_pa));
-#else
-	dtb_early_va = __va(dtb_pa);
-#endif /* CONFIG_64BIT */
 #endif /* CONFIG_BUILTIN_DTB */
-#else
+#else /* __PAGETABLE_PMD_FOLDED */
 #ifndef CONFIG_BUILTIN_DTB
 	/* Create two consecutive PGD mappings for FDT early scan */
 	pa = dtb_pa & ~(PGDIR_SIZE - 1);
@@ -635,13 +631,9 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
 			   pa + PGDIR_SIZE, PGDIR_SIZE, PAGE_KERNEL);
 	dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PGDIR_SIZE - 1));
 #else /* CONFIG_BUILTIN_DTB */
-#ifdef CONFIG_64BIT
-	dtb_early_va = kernel_mapping_pa_to_va(XIP_FIXUP(dtb_pa));
-#else
 	dtb_early_va = __va(dtb_pa);
-#endif /* CONFIG_64BIT */
 #endif /* CONFIG_BUILTIN_DTB */
-#endif
+#endif /* __PAGETABLE_PMD_FOLDED */
 	dtb_early_pa = dtb_pa;
 
 	/*
-- 
2.30.2


WARNING: multiple messages have this Message-ID (diff)
From: Alexandre Ghiti <alex@ghiti.fr>
To: Paul Walmsley <paul.walmsley@sifive.com>,
	Palmer Dabbelt <palmer@dabbelt.com>,
	Albert Ou <aou@eecs.berkeley.edu>,
	linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org
Cc: Alexandre Ghiti <alex@ghiti.fr>
Subject: [PATCH 4/5] riscv: Simplify BUILTIN_DTB device tree mapping handling
Date: Fri, 23 Jul 2021 15:01:27 +0200	[thread overview]
Message-ID: <20210723130128.47664-5-alex@ghiti.fr> (raw)
In-Reply-To: <20210723130128.47664-1-alex@ghiti.fr>

__PAGETABLE_PMD_FOLDED defines a 2-level page table that is only used in
32-bit kernel, so there is no need to check for CONFIG_64BIT in #ifndef
__PAGETABLE_PMD_FOLDED and vice-versa.

Signed-off-by: Alexandre Ghiti <alex@ghiti.fr>
---
 arch/riscv/mm/init.c | 12 ++----------
 1 file changed, 2 insertions(+), 10 deletions(-)

diff --git a/arch/riscv/mm/init.c b/arch/riscv/mm/init.c
index 6b29c5791555..1b30ad7e3ebc 100644
--- a/arch/riscv/mm/init.c
+++ b/arch/riscv/mm/init.c
@@ -614,18 +614,14 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
 			   pa + PMD_SIZE, PMD_SIZE, PAGE_KERNEL);
 	dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PMD_SIZE - 1));
 #else /* CONFIG_BUILTIN_DTB */
-#ifdef CONFIG_64BIT
 	/*
 	 * __va can't be used since it would return a linear mapping address
 	 * whereas dtb_early_va will be used before setup_vm_final installs
 	 * the linear mapping.
 	 */
 	dtb_early_va = kernel_mapping_pa_to_va(XIP_FIXUP(dtb_pa));
-#else
-	dtb_early_va = __va(dtb_pa);
-#endif /* CONFIG_64BIT */
 #endif /* CONFIG_BUILTIN_DTB */
-#else
+#else /* __PAGETABLE_PMD_FOLDED */
 #ifndef CONFIG_BUILTIN_DTB
 	/* Create two consecutive PGD mappings for FDT early scan */
 	pa = dtb_pa & ~(PGDIR_SIZE - 1);
@@ -635,13 +631,9 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
 			   pa + PGDIR_SIZE, PGDIR_SIZE, PAGE_KERNEL);
 	dtb_early_va = (void *)DTB_EARLY_BASE_VA + (dtb_pa & (PGDIR_SIZE - 1));
 #else /* CONFIG_BUILTIN_DTB */
-#ifdef CONFIG_64BIT
-	dtb_early_va = kernel_mapping_pa_to_va(XIP_FIXUP(dtb_pa));
-#else
 	dtb_early_va = __va(dtb_pa);
-#endif /* CONFIG_64BIT */
 #endif /* CONFIG_BUILTIN_DTB */
-#endif
+#endif /* __PAGETABLE_PMD_FOLDED */
 	dtb_early_pa = dtb_pa;
 
 	/*
-- 
2.30.2


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  parent reply	other threads:[~2021-07-23 13:05 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-23 13:01 [PATCH 0/5] Small cleanup for mm/init.c and address conversion macros Alexandre Ghiti
2021-07-23 13:01 ` Alexandre Ghiti
2021-07-23 13:01 ` [PATCH 1/5] riscv: Introduce va_kernel_pa_offset for 32-bit kernel Alexandre Ghiti
2021-07-23 13:01   ` Alexandre Ghiti
2021-07-23 13:01 ` [PATCH 2/5] riscv: Get rid of map_size parameter to create_kernel_page_table Alexandre Ghiti
2021-07-23 13:01   ` Alexandre Ghiti
2021-07-23 13:01 ` [PATCH 3/5] riscv: Use __maybe_unused instead of #ifdefs around variable declarations Alexandre Ghiti
2021-07-23 13:01   ` Alexandre Ghiti
2021-07-23 13:01 ` Alexandre Ghiti [this message]
2021-07-23 13:01   ` [PATCH 4/5] riscv: Simplify BUILTIN_DTB device tree mapping handling Alexandre Ghiti
2021-07-23 13:01 ` [PATCH 5/5] riscv: Move early fdt mapping creation in its own function Alexandre Ghiti
2021-07-23 13:01   ` Alexandre Ghiti
2021-08-12  7:18 ` [PATCH 0/5] Small cleanup for mm/init.c and address conversion macros Palmer Dabbelt
2021-08-12  7:18   ` Palmer Dabbelt

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