Commit 62f5242e authored by Felipe Contreras's avatar Felipe Contreras Committed by Greg Kroah-Hartman
Browse files

staging: ti dspbridge: deh: ensure only tlb #0 is enabled 



We don't want the DSP to continue writing into other mapped pages, no
matter how unlikely.

Based on extensive discussion with Fernando Guzman Lugo.

Signed-off-by: default avatarFelipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@suse.de>
parent 4574fae5

drivers/staging/tidspbridge/core/ue_deh.c

+8 −0
Original line number Diff line number Diff line
@@ -186,6 +186,14 @@ void bridge_deh_notify(struct deh_mgr *deh_mgr, u32 ulEventMask, u32 dwErrInfo) 
		print_dsp_trace_buffer(dev_context);

		dump_dl_modules(dev_context);



		/*

		 * Before acking the MMU fault, let's make sure MMU can only

		 * access entry #0. Then add a new entry so that the DSP OS

		 * can continue in order to dump the stack.

		 */

		hw_mmu_twl_disable(resources->dw_dmmu_base);

		hw_mmu_tlb_flush_all(resources->dw_dmmu_base);



		hw_mmu_tlb_add(resources->dw_dmmu_base,

				virt_to_phys(dummy_va_addr), fault_addr,

				HW_PAGE_SIZE4KB, 1,