Commit 4323d4ca authored Jun 21, 2017 by Akhil P Oommen

msm: kgsl: Avoid cache ops on secure memory



There is no check before cache ops if the memory is marked secure.
This leads to stage 2 pagefault if a secure memory is passed to
IOCTL_KGSL_GPUMEM_SYNC_CACHE ioctl because kernel is not allowed to
do cache ops on secure memory. This can be avoided by returning
success immediately if the memory is marked as secure.

Change-Id: I215d77d2a488cdb00e8e18cfd38cddd9632fd9f6
Signed-off-by: Akhil P Oommen <akhilpo@codeaurora.org>

parent 099e9fc7

drivers/gpu/msm/kgsl.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -2763,6 +2763,10 @@ static int _kgsl_gpumem_sync_cache(struct kgsl_mem_entry *entry,
		int cacheop;
		int mode;

		/* Cache ops are not allowed on secure memory */
		if (entry->memdesc.flags & KGSL_MEMFLAGS_SECURE)
		return 0;

		/*
		* Flush is defined as (clean \| invalidate). If both bits are set, then
		* do a flush, otherwise check for the individual bits and clean or inv