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[xen master] xen/arm: Move fixmap definitions in a separate header



commit e7f144f80839168e632ea4405ad114e991beecdf
Author:     Julien Grall <jgrall@xxxxxxxxxx>
AuthorDate: Fri May 20 13:09:30 2022 +0100
Commit:     Julien Grall <jgrall@xxxxxxxxxx>
CommitDate: Wed Jun 8 11:04:53 2022 +0100

    xen/arm: Move fixmap definitions in a separate header
    
    To use properly the fixmap definitions, their user would need
    also new to include <xen/acpi.h>. This is not very great when
    the user itself is not meant to directly use ACPI definitions.
    
    Including <xen/acpi.h> in <asm/config.h> is not option because
    the latter header is included by everyone. So move out the fixmap
    entries definition in a new header.
    
    Take the opportunity to also move {set, clear}_fixmap() prototypes
    in the new header.
    
    Note that most of the definitions in <xen/acpi.h> now need to be
    surrounded with #ifndef __ASSEMBLY__ because <asm/fixmap.h> will
    be used in assembly (see EARLY_UART_VIRTUAL_ADDRESS).
    
    The split will become more helpful in a follow-up patch where new
    fixmap entries will be defined.
    
    Signed-off-by: Julien Grall <jgrall@xxxxxxxxxx>
    Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
---
 xen/arch/arm/acpi/lib.c                 |  2 ++
 xen/arch/arm/include/asm/config.h       |  6 ------
 xen/arch/arm/include/asm/early_printk.h |  1 +
 xen/arch/arm/include/asm/fixmap.h       | 24 ++++++++++++++++++++++++
 xen/arch/arm/include/asm/mm.h           |  4 ----
 xen/arch/arm/kernel.c                   |  1 +
 xen/arch/arm/mm.c                       |  1 +
 xen/include/xen/acpi.h                  | 18 +++++++++++-------
 8 files changed, 40 insertions(+), 17 deletions(-)

diff --git a/xen/arch/arm/acpi/lib.c b/xen/arch/arm/acpi/lib.c
index a59cc4074c..41d521f720 100644
--- a/xen/arch/arm/acpi/lib.c
+++ b/xen/arch/arm/acpi/lib.c
@@ -25,6 +25,8 @@
 #include <xen/init.h>
 #include <xen/mm.h>
 
+#include <asm/fixmap.h>
+
 static bool fixmap_inuse;
 
 char *__acpi_map_table(paddr_t phys, unsigned long size)
diff --git a/xen/arch/arm/include/asm/config.h 
b/xen/arch/arm/include/asm/config.h
index b25c9d39bb..3e2a55a910 100644
--- a/xen/arch/arm/include/asm/config.h
+++ b/xen/arch/arm/include/asm/config.h
@@ -169,12 +169,6 @@
 
 #endif
 
-/* Fixmap slots */
-#define FIXMAP_CONSOLE  0  /* The primary UART */
-#define FIXMAP_MISC     1  /* Ephemeral mappings of hardware */
-#define FIXMAP_ACPI_BEGIN  2  /* Start mappings of ACPI tables */
-#define FIXMAP_ACPI_END    (FIXMAP_ACPI_BEGIN + NUM_FIXMAP_ACPI_PAGES - 1)  /* 
End mappings of ACPI tables */
-
 #define NR_hypercalls 64
 
 #define STACK_ORDER 3
diff --git a/xen/arch/arm/include/asm/early_printk.h 
b/xen/arch/arm/include/asm/early_printk.h
index 8dc911cf48..c5149b2976 100644
--- a/xen/arch/arm/include/asm/early_printk.h
+++ b/xen/arch/arm/include/asm/early_printk.h
@@ -11,6 +11,7 @@
 #define __ARM_EARLY_PRINTK_H__
 
 #include <xen/page-size.h>
+#include <asm/fixmap.h>
 
 #ifdef CONFIG_EARLY_PRINTK
 
diff --git a/xen/arch/arm/include/asm/fixmap.h 
b/xen/arch/arm/include/asm/fixmap.h
new file mode 100644
index 0000000000..1cee51e52a
--- /dev/null
+++ b/xen/arch/arm/include/asm/fixmap.h
@@ -0,0 +1,24 @@
+/*
+ * fixmap.h: compile-time virtual memory allocation
+ */
+#ifndef __ASM_FIXMAP_H
+#define __ASM_FIXMAP_H
+
+#include <xen/acpi.h>
+
+/* Fixmap slots */
+#define FIXMAP_CONSOLE  0  /* The primary UART */
+#define FIXMAP_MISC     1  /* Ephemeral mappings of hardware */
+#define FIXMAP_ACPI_BEGIN  2  /* Start mappings of ACPI tables */
+#define FIXMAP_ACPI_END    (FIXMAP_ACPI_BEGIN + NUM_FIXMAP_ACPI_PAGES - 1)  /* 
End mappings of ACPI tables */
+
+#ifndef __ASSEMBLY__
+
+/* Map a page in a fixmap entry */
+extern void set_fixmap(unsigned map, mfn_t mfn, unsigned attributes);
+/* Remove a mapping from a fixmap entry */
+extern void clear_fixmap(unsigned map);
+
+#endif /* __ASSEMBLY__ */
+
+#endif /* __ASM_FIXMAP_H */
diff --git a/xen/arch/arm/include/asm/mm.h b/xen/arch/arm/include/asm/mm.h
index 424aaf2823..045a8ba4bb 100644
--- a/xen/arch/arm/include/asm/mm.h
+++ b/xen/arch/arm/include/asm/mm.h
@@ -191,10 +191,6 @@ extern void mmu_init_secondary_cpu(void);
 extern void setup_xenheap_mappings(unsigned long base_mfn, unsigned long 
nr_mfns);
 /* Map a frame table to cover physical addresses ps through pe */
 extern void setup_frametable_mappings(paddr_t ps, paddr_t pe);
-/* Map a 4k page in a fixmap entry */
-extern void set_fixmap(unsigned map, mfn_t mfn, unsigned attributes);
-/* Remove a mapping from a fixmap entry */
-extern void clear_fixmap(unsigned map);
 /* map a physical range in virtual memory */
 void __iomem *ioremap_attr(paddr_t start, size_t len, unsigned attributes);
 
diff --git a/xen/arch/arm/kernel.c b/xen/arch/arm/kernel.c
index 8f43caa186..25ded1c056 100644
--- a/xen/arch/arm/kernel.c
+++ b/xen/arch/arm/kernel.c
@@ -15,6 +15,7 @@
 #include <xen/vmap.h>
 
 #include <asm/byteorder.h>
+#include <asm/fixmap.h>
 #include <asm/kernel.h>
 #include <asm/setup.h>
 
diff --git a/xen/arch/arm/mm.c b/xen/arch/arm/mm.c
index 6b7b72de27..52b2a03940 100644
--- a/xen/arch/arm/mm.c
+++ b/xen/arch/arm/mm.c
@@ -41,6 +41,7 @@
 #include <xen/sizes.h>
 #include <xen/libfdt/libfdt.h>
 
+#include <asm/fixmap.h>
 #include <asm/setup.h>
 
 /* Override macros from asm/page.h to make them work with mfn_t */
diff --git a/xen/include/xen/acpi.h b/xen/include/xen/acpi.h
index 39d51fcd01..1b9c75e68f 100644
--- a/xen/include/xen/acpi.h
+++ b/xen/include/xen/acpi.h
@@ -28,6 +28,15 @@
 #define _LINUX
 #endif
 
+/*
+ * Fixmap pages to reserve for ACPI boot-time tables (see
+ * arch/x86/include/asm/fixmap.h or arch/arm/include/asm/fixmap.h),
+ * 64 pages(256KB) is large enough for most cases.)
+ */
+#define NUM_FIXMAP_ACPI_PAGES  64
+
+#ifndef __ASSEMBLY__
+
 #include <xen/list.h>
 
 #include <acpi/acpi.h>
@@ -39,13 +48,6 @@
 #define ACPI_MADT_GET_POLARITY(inti)   ACPI_MADT_GET_(POLARITY, inti)
 #define ACPI_MADT_GET_TRIGGER(inti)    ACPI_MADT_GET_(TRIGGER, inti)
 
-/*
- * Fixmap pages to reserve for ACPI boot-time tables (see
- * arch/x86/include/asm/fixmap.h or arch/arm/include/asm/config.h,
- * 64 pages(256KB) is large enough for most cases.)
- */
-#define NUM_FIXMAP_ACPI_PAGES  64
-
 #define BAD_MADT_ENTRY(entry, end) (                                        \
                 (!(entry)) || (unsigned long)(entry) + sizeof(*(entry)) > 
(end) ||  \
                 (entry)->header.length < sizeof(*(entry)))
@@ -207,4 +209,6 @@ void acpi_reboot(void);
 void acpi_dmar_zap(void);
 void acpi_dmar_reinstate(void);
 
+#endif /* __ASSEMBLY__ */
+
 #endif /*_LINUX_ACPI_H*/
--
generated by git-patchbot for /home/xen/git/xen.git#master



 


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