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Message-ID: <c94717708db817a0a0a6349431a2701252686899.1694443576.git.christophe.leroy@csgroup.eu>
Date: Mon, 11 Sep 2023 21:03:13 +0200
From: Christophe Leroy <christophe.leroy@...roup.eu>
To: Michael Ellerman <mpe@...erman.id.au>,
Nicholas Piggin <npiggin@...il.com>
Cc: Christophe Leroy <christophe.leroy@...roup.eu>,
linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v1 07/19] powerpc: Untangle fixmap.h and pgtable.h and mmu.h
fixmap.h need pgtable.h for [un]map_kernel_page()
pgtable.h need fixmap.h for FIXADDR_TOP.
Untangle the two files by moving FIXADDR_TOP into pgtable.h
Also move VIRT_IMMR_BASE to fixmap.h to avoid fixmap.h in mmu.h
Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
arch/powerpc/include/asm/book3s/32/pgtable.h | 9 ++++++++-
arch/powerpc/include/asm/book3s/64/pgtable.h | 1 +
arch/powerpc/include/asm/fixmap.h | 16 ++++------------
arch/powerpc/include/asm/nohash/32/mmu-8xx.h | 1 -
arch/powerpc/include/asm/nohash/32/pgtable.h | 9 ++++++++-
arch/powerpc/include/asm/nohash/64/pgtable.h | 1 +
arch/powerpc/mm/init_32.c | 1 +
arch/powerpc/mm/mem.c | 1 +
arch/powerpc/mm/nohash/8xx.c | 2 ++
arch/powerpc/platforms/8xx/cpm1.c | 1 +
10 files changed, 27 insertions(+), 15 deletions(-)
diff --git a/arch/powerpc/include/asm/book3s/32/pgtable.h b/arch/powerpc/include/asm/book3s/32/pgtable.h
index 543c3691839b..45b69ae2631e 100644
--- a/arch/powerpc/include/asm/book3s/32/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/32/pgtable.h
@@ -170,7 +170,14 @@ void unmap_kernel_page(unsigned long va);
* value (for now) on others, from where we can start layout kernel
* virtual space that goes below PKMAP and FIXMAP
*/
-#include <asm/fixmap.h>
+
+#define FIXADDR_SIZE 0
+#ifdef CONFIG_KASAN
+#include <asm/kasan.h>
+#define FIXADDR_TOP (KASAN_SHADOW_START - PAGE_SIZE)
+#else
+#define FIXADDR_TOP ((unsigned long)(-PAGE_SIZE))
+#endif
/*
* ioremap_bot starts at that address. Early ioremaps move down from there,
diff --git a/arch/powerpc/include/asm/book3s/64/pgtable.h b/arch/powerpc/include/asm/book3s/64/pgtable.h
index 7c4ad1e03a49..dbd545e73161 100644
--- a/arch/powerpc/include/asm/book3s/64/pgtable.h
+++ b/arch/powerpc/include/asm/book3s/64/pgtable.h
@@ -316,6 +316,7 @@ extern unsigned long pci_io_base;
#define IOREMAP_START (ioremap_bot)
#define IOREMAP_END (KERN_IO_END - FIXADDR_SIZE)
#define FIXADDR_SIZE SZ_32M
+#define FIXADDR_TOP (IOREMAP_END + FIXADDR_SIZE)
#ifndef __ASSEMBLY__
diff --git a/arch/powerpc/include/asm/fixmap.h b/arch/powerpc/include/asm/fixmap.h
index a832aeafe560..f9068dd8dfce 100644
--- a/arch/powerpc/include/asm/fixmap.h
+++ b/arch/powerpc/include/asm/fixmap.h
@@ -23,18 +23,6 @@
#include <asm/kmap_size.h>
#endif
-#ifdef CONFIG_PPC64
-#define FIXADDR_TOP (IOREMAP_END + FIXADDR_SIZE)
-#else
-#define FIXADDR_SIZE 0
-#ifdef CONFIG_KASAN
-#include <asm/kasan.h>
-#define FIXADDR_TOP (KASAN_SHADOW_START - PAGE_SIZE)
-#else
-#define FIXADDR_TOP ((unsigned long)(-PAGE_SIZE))
-#endif
-#endif
-
/*
* Here we define all the compile-time 'special' virtual
* addresses. The point is to have a constant address at
@@ -119,5 +107,9 @@ static inline void __set_fixmap(enum fixed_addresses idx,
#define __early_set_fixmap __set_fixmap
+#ifdef CONFIG_PPC_8xx
+#define VIRT_IMMR_BASE (__fix_to_virt(FIX_IMMR_BASE))
+#endif
+
#endif /* !__ASSEMBLY__ */
#endif
diff --git a/arch/powerpc/include/asm/nohash/32/mmu-8xx.h b/arch/powerpc/include/asm/nohash/32/mmu-8xx.h
index 0e93a4728c9e..141d82e249a8 100644
--- a/arch/powerpc/include/asm/nohash/32/mmu-8xx.h
+++ b/arch/powerpc/include/asm/nohash/32/mmu-8xx.h
@@ -188,7 +188,6 @@ typedef struct {
} mm_context_t;
#define PHYS_IMMR_BASE (mfspr(SPRN_IMMR) & 0xfff80000)
-#define VIRT_IMMR_BASE (__fix_to_virt(FIX_IMMR_BASE))
/* Page size definitions, common between 32 and 64-bit
*
diff --git a/arch/powerpc/include/asm/nohash/32/pgtable.h b/arch/powerpc/include/asm/nohash/32/pgtable.h
index 868aecbec8d1..c8311ee08811 100644
--- a/arch/powerpc/include/asm/nohash/32/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/32/pgtable.h
@@ -71,7 +71,14 @@ void unmap_kernel_page(unsigned long va);
* value (for now) on others, from where we can start layout kernel
* virtual space that goes below PKMAP and FIXMAP
*/
-#include <asm/fixmap.h>
+
+#define FIXADDR_SIZE 0
+#ifdef CONFIG_KASAN
+#include <asm/kasan.h>
+#define FIXADDR_TOP (KASAN_SHADOW_START - PAGE_SIZE)
+#else
+#define FIXADDR_TOP ((unsigned long)(-PAGE_SIZE))
+#endif
/*
* ioremap_bot starts at that address. Early ioremaps move down from there,
diff --git a/arch/powerpc/include/asm/nohash/64/pgtable.h b/arch/powerpc/include/asm/nohash/64/pgtable.h
index 8083c04a1e6d..dee3fc654d40 100644
--- a/arch/powerpc/include/asm/nohash/64/pgtable.h
+++ b/arch/powerpc/include/asm/nohash/64/pgtable.h
@@ -57,6 +57,7 @@
#define IOREMAP_START (ioremap_bot)
#define IOREMAP_END (KERN_IO_START + KERN_IO_SIZE - FIXADDR_SIZE)
#define FIXADDR_SIZE SZ_32M
+#define FIXADDR_TOP (IOREMAP_END + FIXADDR_SIZE)
/*
* Defines the address of the vmemap area, in its own region on
diff --git a/arch/powerpc/mm/init_32.c b/arch/powerpc/mm/init_32.c
index d8adc452f431..4e71dfe7d026 100644
--- a/arch/powerpc/mm/init_32.c
+++ b/arch/powerpc/mm/init_32.c
@@ -39,6 +39,7 @@
#include <asm/hugetlb.h>
#include <asm/kup.h>
#include <asm/kasan.h>
+#include <asm/fixmap.h>
#include <mm/mmu_decl.h>
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 8b121df7b08f..08f3ec9d522b 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -26,6 +26,7 @@
#include <asm/ftrace.h>
#include <asm/code-patching.h>
#include <asm/setup.h>
+#include <asm/fixmap.h>
#include <mm/mmu_decl.h>
diff --git a/arch/powerpc/mm/nohash/8xx.c b/arch/powerpc/mm/nohash/8xx.c
index dbbfe897455d..bb9c39b449d1 100644
--- a/arch/powerpc/mm/nohash/8xx.c
+++ b/arch/powerpc/mm/nohash/8xx.c
@@ -10,6 +10,8 @@
#include <linux/memblock.h>
#include <linux/hugetlb.h>
+#include <asm/fixmap.h>
+
#include <mm/mmu_decl.h>
#define IMMR_SIZE (FIX_IMMR_SIZE << PAGE_SHIFT)
diff --git a/arch/powerpc/platforms/8xx/cpm1.c b/arch/powerpc/platforms/8xx/cpm1.c
index ebb5f6a27dbf..b24d4102fbf6 100644
--- a/arch/powerpc/platforms/8xx/cpm1.c
+++ b/arch/powerpc/platforms/8xx/cpm1.c
@@ -40,6 +40,7 @@
#include <asm/io.h>
#include <asm/rheap.h>
#include <asm/cpm.h>
+#include <asm/fixmap.h>
#include <sysdev/fsl_soc.h>
--
2.41.0
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