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Max Filippov 6a776f6ae3 xtensa: make __pa work with uncached KSEG addresses ... commit 2b83878dd7 upstream. When __pa is applied to virtual address in uncached KSEG region the result is incorrect. Fix it by checking if the original address is in the uncached KSEG and adjusting the result. It looks better than masking off bits because pfn_valid would correctly work with new __pa results and it may be made working in noMMU case, once we get definition for uncached memory view. This is required for the dma_common_mmap and DMA debug code to work correctly: they both indirectly use __pa with coherent DMA addresses. In case of DMA debug the visible effect is false reports that an address mapped for DMA is accessed by CPU. Tested-by: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com> Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>		History 2017-04-12 12:41:14 +02:00
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boot	xtensa: rearrange CCOUNT calibration	2016-09-20 18:52:59 -07:00
configs	xtensa: add default memmap and mmio32native options to defconfigs	2016-09-20 20:43:24 -07:00
include	xtensa: make __pa work with uncached KSEG addresses	2017-04-12 12:41:14 +02:00
kernel	xtensa: move parse_tag_fdt out of #ifdef CONFIG_BLK_DEV_INITRD	2017-03-15 10:02:47 +08:00
lib	xtensa: fixes for configs without loop option	2015-11-02 18:02:47 +03:00
mm	Xtensa improvements for 4.9:	2016-10-05 17:44:48 -07:00
oprofile	xtensa: move oprofile stack tracing to stacktrace.c	2015-08-17 07:32:49 +03:00
platforms	Xtensa improvements for 4.9:	2016-10-05 17:44:48 -07:00
variants	xtensa: Added Cadence CSP kernel configuration for Xtensa	2016-09-09 18:39:09 -07:00
Kconfig	xtensa: disable MMU initialization option on MMUv2 cores	2016-09-29 12:55:00 -07:00
Kconfig.debug	xtensa: disable link optimization	2014-12-15 23:47:24 -08:00
Makefile	xtensa: define CONFIG_CPU_{BIG,LITTLE}_ENDIAN	2016-03-11 08:53:31 +00:00