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authorRik van Riel <riel@redhat.com>2008-07-24 00:27:05 -0400
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-24 13:47:15 -0400
commit28b2ee20c7cba812b6f2ccf6d722cf86d00a84dc (patch)
treee8f1efd05c38c1cb26ca3ee051a454eb685fd122 /arch
parent0d71d10a4252a3938e6b70189bc776171c02e076 (diff)
access_process_vm device memory infrastructure
In order to be able to debug things like the X server and programs using the PPC Cell SPUs, the debugger needs to be able to access device memory through ptrace and /proc/pid/mem. This patch: Add the generic_access_phys access function and put the hooks in place to allow access_process_vm to access device or PPC Cell SPU memory. [riel@redhat.com: Add documentation for the vm_ops->access function] Signed-off-by: Rik van Riel <riel@redhat.com> Signed-off-by: Benjamin Herrensmidt <benh@kernel.crashing.org> Cc: Dave Airlie <airlied@linux.ie> Cc: Hugh Dickins <hugh@veritas.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/Kconfig3
-rw-r--r--arch/x86/Kconfig1
-rw-r--r--arch/x86/mm/ioremap.c8
3 files changed, 12 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index 4d5ebbc1e72b..6093c0be58b0 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -31,6 +31,9 @@ config KRETPROBES
31 def_bool y 31 def_bool y
32 depends on KPROBES && HAVE_KRETPROBES 32 depends on KPROBES && HAVE_KRETPROBES
33 33
34config HAVE_IOREMAP_PROT
35 def_bool n
36
34config HAVE_KPROBES 37config HAVE_KPROBES
35 def_bool n 38 def_bool n
36 39
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 03980cb04291..b2ddfcf01728 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -21,6 +21,7 @@ config X86
21 select HAVE_UNSTABLE_SCHED_CLOCK 21 select HAVE_UNSTABLE_SCHED_CLOCK
22 select HAVE_IDE 22 select HAVE_IDE
23 select HAVE_OPROFILE 23 select HAVE_OPROFILE
24 select HAVE_IOREMAP_PROT
24 select HAVE_KPROBES 25 select HAVE_KPROBES
25 select HAVE_KRETPROBES 26 select HAVE_KRETPROBES
26 select HAVE_DYNAMIC_FTRACE 27 select HAVE_DYNAMIC_FTRACE
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index 24c1d3c30186..016f335bbeea 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -330,6 +330,14 @@ static void __iomem *ioremap_default(resource_size_t phys_addr,
330 return (void __iomem *)ret; 330 return (void __iomem *)ret;
331} 331}
332 332
333void __iomem *ioremap_prot(resource_size_t phys_addr, unsigned long size,
334 unsigned long prot_val)
335{
336 return __ioremap_caller(phys_addr, size, (prot_val & _PAGE_CACHE_MASK),
337 __builtin_return_address(0));
338}
339EXPORT_SYMBOL(ioremap_prot);
340
333/** 341/**
334 * iounmap - Free a IO remapping 342 * iounmap - Free a IO remapping
335 * @addr: virtual address from ioremap_* 343 * @addr: virtual address from ioremap_*