File libxc-bitmap-50a5215f30e964a6f16165ab57925ca39f... of Package xen

Overview Repositories Revisions Requests Users Attributes Meta

File libxc-bitmap-50a5215f30e964a6f16165ab57925ca39f31a849.patch of Package xen (Revision 656cf29e84133fb5de01a9605aeb2d2b)

Currently displaying revision 656cf29e84133fb5de01a9605aeb2d2b , Show latest

From: Olaf Hering <olaf@aepfle.de>
Date: Thu, 24 Sep 2020 20:08:43 +0200
Subject: libxc bitmap 50a5215f30e964a6f16165ab57925ca39f31a849

libxc/bitops: increase potential size of bitmaps

If the bitmap is used to represent domU pages, the amount of memory is
limited to 8TB due to the 32bit value. Adjust the code to use 64bit
values as input. All callers already use some form of 64bit as input,
so no further adjustment is required.

Signed-off-by: Olaf Hering <olaf@aepfle.de>
Acked-by: Andrew Cooper <andrew.cooper3@citrix.com>
Acked-by: Wei Liu <wl@xen.org>
---
 tools/libxc/xc_bitops.h | 22 +++++++++++-----------
 1 file changed, 11 insertions(+), 11 deletions(-)

Index: xen-4.14.0-testing/tools/libxc/xc_bitops.h
===================================================================
--- xen-4.14.0-testing.orig/tools/libxc/xc_bitops.h
+++ xen-4.14.0-testing/tools/libxc/xc_bitops.h
@@ -14,52 +14,52 @@
 #define BITMAP_SHIFT(_nr) ((_nr) % 8)
 
 /* calculate required space for number of bytes needed to hold nr_bits */
-static inline int bitmap_size(int nr_bits)
+static inline unsigned long bitmap_size(unsigned long nr_bits)
 {
     return (nr_bits + 7) / 8;
 }
 
-static inline void *bitmap_alloc(int nr_bits)
+static inline void *bitmap_alloc(unsigned long nr_bits)
 {
     return calloc(1, bitmap_size(nr_bits));
 }
 
-static inline void bitmap_set(void *addr, int nr_bits)
+static inline void bitmap_set(void *addr, unsigned long nr_bits)
 {
     memset(addr, 0xff, bitmap_size(nr_bits));
 }
 
-static inline void bitmap_clear(void *addr, int nr_bits)
+static inline void bitmap_clear(void *addr, unsigned long nr_bits)
 {
     memset(addr, 0, bitmap_size(nr_bits));
 }
 
-static inline int test_bit(int nr, const void *_addr)
+static inline int test_bit(unsigned long nr, const void *_addr)
 {
     const char *addr = _addr;
     return (BITMAP_ENTRY(nr, addr) >> BITMAP_SHIFT(nr)) & 1;
 }
 
-static inline void clear_bit(int nr, void *_addr)
+static inline void clear_bit(unsigned long nr, void *_addr)
 {
     char *addr = _addr;
     BITMAP_ENTRY(nr, addr) &= ~(1UL << BITMAP_SHIFT(nr));
 }
 
-static inline void set_bit(int nr, void *_addr)
+static inline void set_bit(unsigned long nr, void *_addr)
 {
     char *addr = _addr;
     BITMAP_ENTRY(nr, addr) |= (1UL << BITMAP_SHIFT(nr));
 }
 
-static inline int test_and_clear_bit(int nr, void *addr)
+static inline int test_and_clear_bit(unsigned long nr, void *addr)
 {
     int oldbit = test_bit(nr, addr);
     clear_bit(nr, addr);
     return oldbit;
 }
 
-static inline int test_and_set_bit(int nr, void *addr)
+static inline int test_and_set_bit(unsigned long nr, void *addr)
 {
     int oldbit = test_bit(nr, addr);
     set_bit(nr, addr);
@@ -67,11 +67,11 @@ static inline int test_and_set_bit(int n
 }
 
 static inline void bitmap_or(void *_dst, const void *_other,
-                             int nr_bits)
+                             unsigned long nr_bits)
 {
     char *dst = _dst;
     const char *other = _other;
-    int i;
+    unsigned long i;
     for ( i = 0; i < bitmap_size(nr_bits); ++i )
         dst[i] |= other[i];
 }

Places

File libxc-bitmap-50a5215f30e964a6f16165ab57925ca39f31a849.patch of Package xen (Revision 656cf29e84133fb5de01a9605aeb2d2b)

Places