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| author | Paul Burton <paul.burton@imgtec.com> | 2017-08-12 21:36:30 -0700 |
|---|---|---|
| committer | Ralf Baechle <ralf@linux-mips.org> | 2017-09-04 13:53:14 +0200 |
| commit | 00578cd864d45ae4b8fa3f684f8d6f783dd8d15d (patch) | |
| tree | cc1e63a1ef5d67306d7b0a9b0376ec367d011c4f /arch | |
| parent | b11d4c1f5a3ac68fa163b0daeca1f98ba328c9de (diff) | |
| download | linux-stable-00578cd864d45ae4b8fa3f684f8d6f783dd8d15d.tar.gz linux-stable-00578cd864d45ae4b8fa3f684f8d6f783dd8d15d.tar.bz2 linux-stable-00578cd864d45ae4b8fa3f684f8d6f783dd8d15d.zip | |
MIPS: VDSO: Drop gic_get_usm_range() usage
We don't really need gic_get_usm_range() to abstract discovery of the
address of the GIC user-visible section now that we have access to its
base address globally.
Switch to calculating it ourselves, which will allow us to stop
requiring the irqchip driver to care about a counter exposed to userland
for use via the VDSO.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/17040/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/mips/kernel/vdso.c | 15 |
1 files changed, 5 insertions, 10 deletions
diff --git a/arch/mips/kernel/vdso.c b/arch/mips/kernel/vdso.c index 093517e85a6c..019035d7225c 100644 --- a/arch/mips/kernel/vdso.c +++ b/arch/mips/kernel/vdso.c @@ -13,13 +13,13 @@ #include <linux/err.h> #include <linux/init.h> #include <linux/ioport.h> -#include <linux/irqchip/mips-gic.h> #include <linux/mm.h> #include <linux/sched.h> #include <linux/slab.h> #include <linux/timekeeper_internal.h> #include <asm/abi.h> +#include <asm/mips-cps.h> #include <asm/vdso.h> /* Kernel-provided data used by the VDSO. */ @@ -99,9 +99,8 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) { struct mips_vdso_image *image = current->thread.abi->vdso; struct mm_struct *mm = current->mm; - unsigned long gic_size, vvar_size, size, base, data_addr, vdso_addr; + unsigned long gic_size, vvar_size, size, base, data_addr, vdso_addr, gic_pfn; struct vm_area_struct *vma; - struct resource gic_res; int ret; if (down_write_killable(&mm->mmap_sem)) @@ -125,7 +124,7 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) * only map a page even though the total area is 64K, as we only need * the counter registers at the start. */ - gic_size = gic_present ? PAGE_SIZE : 0; + gic_size = mips_gic_present() ? PAGE_SIZE : 0; vvar_size = gic_size + PAGE_SIZE; size = vvar_size + image->size; @@ -148,13 +147,9 @@ int arch_setup_additional_pages(struct linux_binprm *bprm, int uses_interp) /* Map GIC user page. */ if (gic_size) { - ret = gic_get_usm_range(&gic_res); - if (ret) - goto out; + gic_pfn = virt_to_phys(mips_gic_base + MIPS_GIC_USER_OFS) >> PAGE_SHIFT; - ret = io_remap_pfn_range(vma, base, - gic_res.start >> PAGE_SHIFT, - gic_size, + ret = io_remap_pfn_range(vma, base, gic_pfn, gic_size, pgprot_noncached(PAGE_READONLY)); if (ret) goto out; |