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Commit 8a44d5cb authored by Vishwanath Raju K's avatar Vishwanath Raju K Committed by Gerrit - the friendly Code Review server
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ion: msm: Restrict VMID_CP_CAMERA_ENCODE to read only 



Restrict VMID_CP_CAMERA_ENCODE to read only when it is shared
with VMID_CP_CAMERA to support secure encode.

Change-Id: Ifb40cc0ae4b2bac30d683567d8e7c767ac482be3
Signed-off-by: default avatarVishwanath Raju K <vishk@codeaurora.org>
parent bf8e2cbe

drivers/staging/android/ion/ion_secure_util.c

+12 −0
Original line number Diff line number Diff line
@@ -155,6 +155,8 @@ int ion_hyp_assign_sg(struct sg_table *sgt, int *dest_vm_list, 
	int *dest_perms;

	int i;

	int ret = 0;

	int j = -1;

	int k = -1;



	if (dest_nelems <= 0) {

		pr_err("%s: dest_nelems invalid\n",
@@ -173,10 +175,20 @@ int ion_hyp_assign_sg(struct sg_table *sgt, int *dest_vm_list, 
		if (dest_vm_list[i] == VMID_CP_SEC_DISPLAY ||

		    dest_vm_list[i] == VMID_CP_DSP_EXT)

			dest_perms[i] = PERM_READ;

		else if (dest_vm_list[i] == VMID_CP_CAMERA_ENCODE) {

			j = i;

			dest_perms[i] = PERM_READ | PERM_WRITE;

		} else if (dest_vm_list[i] == VMID_CP_CAMERA) {

			k = i;

			dest_perms[i] = PERM_READ | PERM_WRITE;

		}

		else

			dest_perms[i] = PERM_READ | PERM_WRITE;

	}



	if ((j != -1) && (k != -1))

		dest_perms[j] = PERM_READ;



	ret = hyp_assign_table(sgt, &source_vmid, 1,

			       dest_vm_list, dest_perms, dest_nelems);