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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-07 05:58:22 +0400
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-07 05:58:22 +0400
commite4e88f31bcb5f05f24b9ae518d4ecb44e1a7774d (patch)
tree9eef6998f5bbd1a2c999011d9e0151f00c6e7297 /arch/powerpc/mm/mem.c
parent9753dfe19a85e7e45a34a56f4cb2048bb4f50e27 (diff)
parentef88e3911c0e0301e73fa3b3b2567aabdbe17cc4 (diff)
downloadlinux-e4e88f31bcb5f05f24b9ae518d4ecb44e1a7774d.tar.xz
Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc
* 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc: (185 commits) powerpc: fix compile error with 85xx/p1010rdb.c powerpc: fix compile error with 85xx/p1023_rds.c powerpc/fsl: add MSI support for the Freescale hypervisor arch/powerpc/sysdev/fsl_rmu.c: introduce missing kfree powerpc/fsl: Add support for Integrated Flash Controller powerpc/fsl: update compatiable on fsl 16550 uart nodes powerpc/85xx: fix PCI and localbus properties in p1022ds.dts powerpc/85xx: re-enable ePAPR byte channel driver in corenet32_smp_defconfig powerpc/fsl: Update defconfigs to enable some standard FSL HW features powerpc: Add TBI PHY node to first MDIO bus sbc834x: put full compat string in board match check powerpc/fsl-pci: Allow 64-bit PCIe devices to DMA to any memory address powerpc: Fix unpaired probe_hcall_entry and probe_hcall_exit offb: Fix setting of the pseudo-palette for >8bpp offb: Add palette hack for qemu "standard vga" framebuffer offb: Fix bug in calculating requested vram size powerpc/boot: Change the WARN to INFO for boot wrapper overlap message powerpc/44x: Fix build error on currituck platform powerpc/boot: Change the load address for the wrapper to fit the kernel powerpc/44x: Enable CRASH_DUMP for 440x ... Fix up a trivial conflict in arch/powerpc/include/asm/cputime.h due to the additional sparse-checking code for cputime_t.
Diffstat (limited to 'arch/powerpc/mm/mem.c')
-rw-r--r--arch/powerpc/mm/mem.c23
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 8e2eb6611b0b..d974b79a3068 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -51,6 +51,7 @@
#include <asm/vdso.h>
#include <asm/fixmap.h>
#include <asm/swiotlb.h>
+#include <asm/rtas.h>
#include "mmu_decl.h"
@@ -553,7 +554,7 @@ void update_mmu_cache(struct vm_area_struct *vma, unsigned long address,
#if (defined(CONFIG_PPC_BOOK3E_64) || defined(CONFIG_PPC_FSL_BOOK3E)) \
&& defined(CONFIG_HUGETLB_PAGE)
if (is_vm_hugetlb_page(vma))
- book3e_hugetlb_preload(vma->vm_mm, address, *ptep);
+ book3e_hugetlb_preload(vma, address, *ptep);
#endif
}
@@ -585,3 +586,23 @@ static int add_system_ram_resources(void)
return 0;
}
subsys_initcall(add_system_ram_resources);
+
+#ifdef CONFIG_STRICT_DEVMEM
+/*
+ * devmem_is_allowed(): check to see if /dev/mem access to a certain address
+ * is valid. The argument is a physical page number.
+ *
+ * Access has to be given to non-kernel-ram areas as well, these contain the
+ * PCI mmio resources as well as potential bios/acpi data regions.
+ */
+int devmem_is_allowed(unsigned long pfn)
+{
+ if (iomem_is_exclusive(pfn << PAGE_SHIFT))
+ return 0;
+ if (!page_is_ram(pfn))
+ return 1;
+ if (page_is_rtas_user_buf(pfn))
+ return 1;
+ return 0;
+}
+#endif /* CONFIG_STRICT_DEVMEM */