lkml.org 
[lkml]   [2020]   [Dec]   [3]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip: perf/core] mm: Introduce pXX_leaf_size()
The following commit has been merged into the perf/core branch of tip:

Commit-ID: 560dabbdf68bb15f9e241af8f828b1c8c38d6c6f
Gitweb: https://git.kernel.org/tip/560dabbdf68bb15f9e241af8f828b1c8c38d6c6f
Author: Peter Zijlstra <peterz@infradead.org>
AuthorDate: Fri, 13 Nov 2020 11:45:36 +01:00
Committer: Peter Zijlstra <peterz@infradead.org>
CommitterDate: Thu, 03 Dec 2020 10:14:50 +01:00

mm: Introduce pXX_leaf_size()

A number of architectures have non-pagetable aligned huge/large pages.
For such architectures a leaf can actually be part of a larger entry.

Provide generic helpers to determine the size of a page-table leaf.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Matthew Wilcox (Oracle) <willy@infradead.org>
Link: https://lkml.kernel.org/r/20201126121121.102580109@infradead.org
---
include/linux/pgtable.h | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index ed9266c..fefbbdb 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h
@@ -1536,4 +1536,20 @@ typedef unsigned int pgtbl_mod_mask;
#define pmd_leaf(x) 0
#endif

+#ifndef pgd_leaf_size
+#define pgd_leaf_size(x) (1ULL << PGDIR_SHIFT)
+#endif
+#ifndef p4d_leaf_size
+#define p4d_leaf_size(x) P4D_SIZE
+#endif
+#ifndef pud_leaf_size
+#define pud_leaf_size(x) PUD_SIZE
+#endif
+#ifndef pmd_leaf_size
+#define pmd_leaf_size(x) PMD_SIZE
+#endif
+#ifndef pte_leaf_size
+#define pte_leaf_size(x) PAGE_SIZE
+#endif
+
#endif /* _LINUX_PGTABLE_H */
\
 
 \ /
  Last update: 2020-12-03 10:27    [W:0.651 / U:0.084 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site