From: Khalid Aziz <khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
To: juergh-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org,
tycho-E0fblnxP3wo@public.gmane.org,
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Khalid Aziz <khalid-21RPF02GE+GXwddmVfQv5g@public.gmane.org>,
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james.morse-5wv7dgnIgG8@public.gmane.org, iamjoo
Subject: [RFC PATCH v9 01/13] mm: add MAP_HUGETLB support to vm_mmap
Date: Wed, 3 Apr 2019 11:34:02 -0600 [thread overview]
Message-ID: <155f6a436aa38be6b31e37965187d161e1233a1c.1554248002.git.khalid.aziz@oracle.com> (raw)
In-Reply-To: <cover.1554248001.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
In-Reply-To: <cover.1554248001.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
From: Tycho Andersen <tycho-E0fblnxP3wo@public.gmane.org>
vm_mmap is exported, which means kernel modules can use it. In particular,
for testing XPFO support, we want to use it with the MAP_HUGETLB flag, so
let's support it via vm_mmap.
Signed-off-by: Tycho Andersen <tycho-E0fblnxP3wo@public.gmane.org>
Tested-by: Marco Benatto <marco.antonio.780-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Tested-by: Khalid Aziz <khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
Cc: Khalid Aziz <khalid-21RPF02GE+GXwddmVfQv5g@public.gmane.org>
---
include/linux/mm.h | 2 ++
mm/mmap.c | 19 +------------------
mm/util.c | 32 ++++++++++++++++++++++++++++++++
3 files changed, 35 insertions(+), 18 deletions(-)
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 80bb6408fe73..3e4f6525d06b 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -2412,6 +2412,8 @@ struct vm_unmapped_area_info {
extern unsigned long unmapped_area(struct vm_unmapped_area_info *info);
extern unsigned long unmapped_area_topdown(struct vm_unmapped_area_info *info);
+struct file *map_hugetlb_setup(unsigned long *len, unsigned long flags);
+
/*
* Search for an unmapped address range.
*
diff --git a/mm/mmap.c b/mm/mmap.c
index fc1809b1bed6..65382d942598 100644
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -1582,24 +1582,7 @@ unsigned long ksys_mmap_pgoff(unsigned long addr, unsigned long len,
if (unlikely(flags & MAP_HUGETLB && !is_file_hugepages(file)))
goto out_fput;
} else if (flags & MAP_HUGETLB) {
- struct user_struct *user = NULL;
- struct hstate *hs;
-
- hs = hstate_sizelog((flags >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK);
- if (!hs)
- return -EINVAL;
-
- len = ALIGN(len, huge_page_size(hs));
- /*
- * VM_NORESERVE is used because the reservations will be
- * taken when vm_ops->mmap() is called
- * A dummy user value is used because we are not locking
- * memory so no accounting is necessary
- */
- file = hugetlb_file_setup(HUGETLB_ANON_FILE, len,
- VM_NORESERVE,
- &user, HUGETLB_ANONHUGE_INODE,
- (flags >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK);
+ file = map_hugetlb_setup(&len, flags);
if (IS_ERR(file))
return PTR_ERR(file);
}
diff --git a/mm/util.c b/mm/util.c
index 379319b1bcfd..86b763861828 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -357,6 +357,29 @@ unsigned long vm_mmap_pgoff(struct file *file, unsigned long addr,
return ret;
}
+struct file *map_hugetlb_setup(unsigned long *len, unsigned long flags)
+{
+ struct user_struct *user = NULL;
+ struct hstate *hs;
+
+ hs = hstate_sizelog((flags >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK);
+ if (!hs)
+ return ERR_PTR(-EINVAL);
+
+ *len = ALIGN(*len, huge_page_size(hs));
+
+ /*
+ * VM_NORESERVE is used because the reservations will be
+ * taken when vm_ops->mmap() is called
+ * A dummy user value is used because we are not locking
+ * memory so no accounting is necessary
+ */
+ return hugetlb_file_setup(HUGETLB_ANON_FILE, *len,
+ VM_NORESERVE,
+ &user, HUGETLB_ANONHUGE_INODE,
+ (flags >> MAP_HUGE_SHIFT) & MAP_HUGE_MASK);
+}
+
unsigned long vm_mmap(struct file *file, unsigned long addr,
unsigned long len, unsigned long prot,
unsigned long flag, unsigned long offset)
@@ -366,6 +389,15 @@ unsigned long vm_mmap(struct file *file, unsigned long addr,
if (unlikely(offset_in_page(offset)))
return -EINVAL;
+ if (flag & MAP_HUGETLB) {
+ if (file)
+ return -EINVAL;
+
+ file = map_hugetlb_setup(&len, flag);
+ if (IS_ERR(file))
+ return PTR_ERR(file);
+ }
+
return vm_mmap_pgoff(file, addr, len, prot, flag, offset >> PAGE_SHIFT);
}
EXPORT_SYMBOL(vm_mmap);
--
2.17.1
next prev parent reply other threads:[~2019-04-03 17:34 UTC|newest]
Thread overview: 102+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-04-03 17:34 [RFC PATCH v9 00/13] Add support for eXclusive Page Frame Ownership Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 11/13] xpfo, mm: optimize spinlock usage in xpfo_kunmap Khalid Aziz
[not found] ` <5bab13e12d4215112ad2180106cc6bb9b513754a.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-04 7:56 ` Peter Zijlstra
2019-04-04 16:06 ` Khalid Aziz
[not found] ` <cover.1554248001.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-03 17:34 ` Khalid Aziz [this message]
2019-04-03 17:34 ` [RFC PATCH v9 02/13] x86: always set IF before oopsing from page fault Khalid Aziz
[not found] ` <e6c57f675e5b53d4de266412aa526b7660c47918.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-04 0:12 ` Andy Lutomirski
[not found] ` <CALCETrXvwuwkVSJ+S5s7wTBkNNj3fRVxpx9BvsXWrT=3ZdRnCw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-04-04 1:42 ` Tycho Andersen
2019-04-04 4:12 ` Andy Lutomirski
[not found] ` <CALCETrVp37Xo3EMHkeedP1zxUMf9og=mceBa8c55e1F4G1DRSQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-04-04 15:47 ` Tycho Andersen
2019-04-04 16:23 ` Sebastian Andrzej Siewior
2019-04-04 16:28 ` Thomas Gleixner
[not found] ` <alpine.DEB.2.21.1904041822320.1802-ecDvlHI5BZPZikZi3RtOZ1XZhhPuCNm+@public.gmane.org>
2019-04-04 17:11 ` Andy Lutomirski
2019-04-03 17:34 ` [RFC PATCH v9 03/13] mm: Add support for eXclusive Page Frame Ownership (XPFO) Khalid Aziz
[not found] ` <f1ac3700970365fb979533294774af0b0dd84b3b.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-04 7:21 ` Peter Zijlstra
[not found] ` <20190404072152.GN4038-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2019-04-04 9:25 ` Peter Zijlstra
2019-04-04 14:48 ` Tycho Andersen
2019-04-04 7:43 ` Peter Zijlstra
[not found] ` <20190404074323.GO4038-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2019-04-04 15:15 ` Khalid Aziz
[not found] ` <b414bacc-2883-1914-38ec-3d8f4a032e10-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-04 17:01 ` Peter Zijlstra
2019-04-17 16:15 ` Ingo Molnar
2019-04-17 16:15 ` Ingo Molnar
[not found] ` <20190417161042.GA43453-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2019-04-17 16:49 ` Khalid Aziz
2019-04-17 16:49 ` Khalid Aziz
2019-04-17 17:09 ` Ingo Molnar
2019-04-17 17:09 ` Ingo Molnar
2019-04-17 17:19 ` Nadav Amit
2019-04-17 17:19 ` Nadav Amit
2019-04-17 17:26 ` Ingo Molnar
2019-04-17 17:26 ` Ingo Molnar
2019-04-17 17:44 ` Nadav Amit
2019-04-17 17:44 ` Nadav Amit
2019-04-17 21:19 ` Thomas Gleixner
2019-04-17 21:19 ` Thomas Gleixner
[not found] ` <alpine.DEB.2.21.1904172317460.3174-ecDvlHI5BZPZikZi3RtOZ1XZhhPuCNm+@public.gmane.org>
2019-04-17 23:18 ` Linus Torvalds
2019-04-17 23:18 ` Linus Torvalds
2019-04-17 23:42 ` Thomas Gleixner
2019-04-17 23:42 ` Thomas Gleixner
2019-04-17 23:52 ` Linus Torvalds
2019-04-17 23:52 ` Linus Torvalds
2019-04-18 4:41 ` Andy Lutomirski
2019-04-18 4:41 ` Andy Lutomirski
2019-04-18 5:41 ` Kees Cook
2019-04-18 5:41 ` Kees Cook via iommu
2019-04-18 14:34 ` Khalid Aziz
2019-04-18 14:34 ` Khalid Aziz
2019-04-22 19:30 ` Khalid Aziz
2019-04-22 19:30 ` Khalid Aziz
[not found] ` <8f9d059d-e720-cd24-faa6-45493fc012e0-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-22 22:23 ` Kees Cook via iommu
2019-04-22 22:23 ` Kees Cook via iommu
[not found] ` <CAHk-=whUwOjFW6RjHVM8kNOv1QVLJuHj2Dda0=mpLPdJ1UyatQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-04-18 6:14 ` Thomas Gleixner
2019-04-18 6:14 ` Thomas Gleixner
2019-04-17 17:33 ` Khalid Aziz
2019-04-17 17:33 ` Khalid Aziz
2019-04-17 19:49 ` Andy Lutomirski
2019-04-17 19:49 ` Andy Lutomirski
[not found] ` <CALCETrXFzWFMrV-zDa4QFjB=4WnC9RZmorBko65dLGhymDpeQw-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-04-17 19:52 ` Tycho Andersen
2019-04-17 19:52 ` Tycho Andersen
2019-04-17 20:12 ` Khalid Aziz
2019-04-17 20:12 ` Khalid Aziz
2019-05-01 14:49 ` Waiman Long
2019-05-01 14:49 ` Waiman Long
2019-05-01 15:18 ` Khalid Aziz
2019-05-01 15:18 ` Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 04/13] xpfo, x86: Add support for XPFO for x86-64 Khalid Aziz
[not found] ` <c15e7d09dfe3dfdb9947d39ed0ddd6573ff86dbf.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-04 7:52 ` Peter Zijlstra
[not found] ` <20190404075206.GP4038-Nxj+rRp3nVydTX5a5knrm8zTDFooKrT+cvkQGrU6aU0@public.gmane.org>
2019-04-04 15:40 ` Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 05/13] mm: add a user_virt_to_phys symbol Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 06/13] lkdtm: Add test for XPFO Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 07/13] arm64/mm: Add support " Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 08/13] swiotlb: Map the buffer if it was unmapped by XPFO Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 09/13] xpfo: add primitives for mapping underlying memory Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 10/13] arm64/mm, xpfo: temporarily map dcache regions Khalid Aziz
2019-04-03 17:34 ` [RFC PATCH v9 12/13] xpfo, mm: Defer TLB flushes for non-current CPUs (x86 only) Khalid Aziz
[not found] ` <4495dda4bfc4a06b3312cc4063915b306ecfaecb.1554248002.git.khalid.aziz-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-04 4:10 ` Andy Lutomirski
[not found] ` <CALCETrXMXxnWqN94d83UvGWhkD1BNWiwvH2vsUth1w0T3=0ywQ-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2019-04-04 22:55 ` Khalid Aziz
[not found] ` <91f1dbce-332e-25d1-15f6-0e9cfc8b797b-QHcLZuEGTsvQT0dZR+AlfA@public.gmane.org>
2019-04-05 7:17 ` Thomas Gleixner
[not found] ` <alpine.DEB.2.21.1904050909520.1802-ecDvlHI5BZPZikZi3RtOZ1XZhhPuCNm+@public.gmane.org>
2019-04-05 14:44 ` Dave Hansen
[not found] ` <26b00051-b03c-9fce-1446-52f0d6ed52f8-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2019-04-05 15:24 ` Andy Lutomirski
2019-04-05 15:24 ` Andy Lutomirski
[not found] ` <DFA69954-3F0F-4B79-A9B5-893D33D87E51-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>
2019-04-05 15:56 ` Tycho Andersen
2019-04-05 15:56 ` Tycho Andersen
2019-04-05 16:32 ` Andy Lutomirski
2019-04-05 16:32 ` Andy Lutomirski
2019-04-05 15:56 ` Khalid Aziz
2019-04-05 15:56 ` Khalid Aziz
2019-04-05 16:01 ` Dave Hansen
2019-04-05 16:01 ` Dave Hansen
[not found] ` <36b999d4-adf6-08a3-2897-d77b9cba20f8-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>
2019-04-05 16:27 ` Andy Lutomirski
2019-04-05 16:27 ` Andy Lutomirski
[not found] ` <E0BBD625-6FE0-4A8A-884B-E10FAFC3319E-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>
2019-04-05 16:41 ` Peter Zijlstra
2019-04-05 16:41 ` Peter Zijlstra
2019-04-05 17:35 ` Khalid Aziz
2019-04-05 17:35 ` Khalid Aziz
2019-04-05 15:44 ` Khalid Aziz
2019-04-05 15:44 ` Khalid Aziz
2019-04-05 15:24 ` Andy Lutomirski
2019-04-05 15:24 ` Andy Lutomirski
2019-04-04 8:18 ` Peter Zijlstra
2019-04-03 17:34 ` [RFC PATCH v9 13/13] xpfo, mm: Optimize XPFO TLB flushes by batching them together Khalid Aziz
2019-04-06 6:40 ` [RFC PATCH v9 00/13] Add support for eXclusive Page Frame Ownership Jon Masters
2019-04-06 6:40 ` Jon Masters
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