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| author |   David Hildenbrand <david@redhat.com> | 2020-06-04 16:48:44 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2020-06-04 19:06:23 -0700 |
| commit | 3fe4f4991a2a818277445bd5b8b289305b7dd15d (patch) | |
| tree | 7dfebbd437e62220a8897d1dfab9e88b21992b8a /kernel/kexec_file.c | |
| parent | mm/memory_hotplug: introduce add_memory_driver_managed() (diff) | |
| download | linux-dev-3fe4f4991a2a818277445bd5b8b289305b7dd15d.tar.xz linux-dev-3fe4f4991a2a818277445bd5b8b289305b7dd15d.zip | |
kexec_file: don't place kexec images on IORESOURCE_MEM_DRIVER_MANAGED
Memory flagged with IORESOURCE_MEM_DRIVER_MANAGED is special - it won't be
part of the initial memmap of the kexec kernel and not all memory might be
accessible. Don't place any kexec images onto it.
Signed-off-by: David Hildenbrand <david@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Cc: Michal Hocko <mhocko@suse.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: Wei Yang <richard.weiyang@gmail.com>
Cc: Baoquan He <bhe@redhat.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Eric Biederman <ebiederm@xmission.com>
Cc: Pavel Tatashin <pasha.tatashin@soleen.com>
Cc: Dan Williams <dan.j.williams@intel.com>
Link: http://lkml.kernel.org/r/20200508084217.9160-4-david@redhat.com
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/kexec_file.c')
| -rw-r--r-- | kernel/kexec_file.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/kexec_file.c b/kernel/kexec_file.c index faa74d5f6941..bb05fd52de85 100644 --- a/kernel/kexec_file.c +++ b/kernel/kexec_file.c @@ -540,6 +540,11 @@ static int locate_mem_hole_callback(struct resource *res, void *arg) unsigned long sz = end - start + 1; /* Returning 0 will take to next memory range */ + + /* Don't use memory that will be detected and handled by a driver. */ + if (res->flags & IORESOURCE_MEM_DRIVER_MANAGED) + return 0; + if (sz < kbuf->memsz) return 0; |