kernel.git/arch/mips/include/asm/io.h, branch linux-3.18.y

MIPS: Fix ISA virt/bus conversion for non-zero PHYS_OFFSET

2018-09-26T06:33:54Z

[ Upstream commit 0494d7ffdcebc6935410ea0719b24ab626675351 ] isa_virt_to_bus() & isa_bus_to_virt() claim to treat ISA bus addresses as being identical to physical addresses, but they fail to do so in the presence of a non-zero PHYS_OFFSET. Correct this by having them use virt_to_phys() & phys_to_virt(), which consolidates the calculations to one place & ensures that ISA bus addresses do indeed match physical addresses. Signed-off-by: Paul Burton Patchwork: https://patchwork.linux-mips.org/patch/20047/ Cc: James Hogan Cc: Ralf Baechle Cc: linux-mips@linux-mips.org Cc: Vladimir Kondratiev Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

MIPS: io: Add barrier after register read in inX()

2018-07-03T09:18:46Z

commit 18f3e95b90b28318ef35910d21c39908de672331 upstream. While a barrier is present in the outX() functions before the register write, a similar barrier is missing in the inX() functions after the register read. This could allow memory accesses following inX() to observe stale data. This patch is very similar to commit a1cc7034e33d12dc1 ("MIPS: io: Add barrier after register read in readX()"). Because war_io_reorder_wmb() is both used by writeX() and outX(), if readX() need a barrier then so does inX(). Cc: stable@vger.kernel.org Signed-off-by: Huacai Chen Patchwork: https://patchwork.linux-mips.org/patch/19516/ Signed-off-by: Paul Burton Cc: James Hogan Cc: linux-mips@linux-mips.org Cc: Fuxin Zhang Cc: Zhangjin Wu Cc: Huacai Chen Signed-off-by: Greg Kroah-Hartman

MIPS: io: Add barrier after register read in readX()

2018-07-03T09:18:40Z

[ Upstream commit a1cc7034e33d12dc17d13fbcd7d597d552889097 ] While a barrier is present in the writeX() functions before the register write, a similar barrier is missing in the readX() functions after the register read. This could allow memory accesses following readX() to observe stale data. Signed-off-by: Sinan Kaya Reported-by: Arnd Bergmann Cc: Ralf Baechle Cc: Paul Burton Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/19069/ [jhogan@kernel.org: Tidy commit message] Signed-off-by: James Hogan Signed-off-by: Sasha Levin Signed-off-by: Greg Kroah-Hartman

MIPS: Fix gigaton of warning building with microMIPS.

2014-03-31T16:17:12Z

With binutils 2.24 the attempt to switch with microMIPS mode to MIPS III mode through .set mips3 results in *lots* of warnings like {standard input}: Assembler messages: {standard input}:397: Warning: the 64-bit MIPS architecture does not support the `smartmips' extension during a kernel build. Fixed by using .set arch=r4000 instead. This breaks support for building the kernel with binutils 2.13 which was supported for 32 bit kernels only anyway and 2.14 which was a bad vintage for MIPS anyway. Signed-off-by: Ralf Baechle

MIPS: Extend DMA_MAYBE_COHERENT logic to DMA_NONCOHERENT use

2014-03-26T22:09:20Z

Setting DMA_MAYBE_COHERENT gives a platform the opportunity to select use of cache ops at boot. Signed-off-by: Manuel Lauss Cc: Linux-MIPS Patchwork: https://patchwork.linux-mips.org/patch/6575/ Signed-off-by: Ralf Baechle

MIPS: define write{b,w,l,q}_relaxed

2013-07-01T13:10:59Z

MIPS does define read{b,w,l,q}_relaxed but does not define their write counterparts: write{b,w,l,q}_relaxed. This patch adds the missing definitions for the write*_relaxed I/O accessors. Signed-off-by: Florian Fainelli Acked-by: John Crispin Cc: linux-mips@linux-mips.org Cc: cernekee@gmail.com Cc: jogo@openwrt.org Patchwork: https://patchwork.linux-mips.org/patch/5352/ Signed-off-by: Ralf Baechle

MIPS: Expose missing pci_io{map,unmap} declarations

2013-07-01T13:10:59Z

The GENERIC_PCI_IOMAP does not depend on CONFIG_PCI so move it to the CONFIG_MIPS symbol so it's always selected for MIPS. This fixes the missing pci_iomap declaration for MIPS. Moreover, the pci_iounmap function was not defined in the io.h header file if the CONFIG_PCI symbol is not set, but it should since MIPS is not using CONFIG_GENERIC_IOMAP. This fixes the following problem on a allyesconfig: drivers/net/ethernet/3com/3c59x.c:1031:2: error: implicit declaration of function 'pci_iomap' [-Werror=implicit-function-declaration] drivers/net/ethernet/3com/3c59x.c:1044:3: error: implicit declaration of function 'pci_iounmap' [-Werror=implicit-function-declaration] Signed-off-by: Markos Chandras Acked-by: Steven J. Hill Cc: linux-mips@linux-mips.org Patchwork: https://patchwork.linux-mips.org/patch/5478/ Signed-off-by: Ralf Baechle

MIPS: Make virt_to_phys() work for all unmapped addresses.

2013-05-17T18:36:15Z

As reported: This problem was discovered when doing BGP traffic with the TCP MD5 option activated, where the following call chain caused a crash: * tcp_v4_rcv * tcp_v4_timewait_ack * tcp_v4_send_ack -> follow stack variable rep.th * tcp_v4_md5_hash_hdr * tcp_md5_hash_header * sg_init_one * sg_set_buf * virt_to_page I noticed that tcp_v4_send_reset uses a similar stack variable and also calls tcp_v4_md5_hash_hdr, so it has the same problem. The networking core can indirectly call virt_to_phys() on stack addresses, if this is done from PID 0, the stack will usually be in CKSEG0, so virt_to_phys() needs to work there as well Signed-off-by: David Daney Cc: linux-mips@linux-mips.org Cc: Jiang Liu Cc: eunb.song@samsung.com Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/5220/ Signed-off-by: Ralf Baechle

MIPS: Whitespace cleanup.

2013-02-01T09:00:22Z

Having received another series of whitespace patches I decided to do this once and for all rather than dealing with this kind of patches trickling in forever. Signed-off-by: Ralf Baechle

MIPS: Remove irqflags.h dependency from bitops.h

2012-11-09T09:59:10Z

The "else clause" of most functions in bitops.h invoked raw_local_irq_{save,restore}() and in doing so had a dependency on irqflags.h. This fix moves said code to bitops.c, removing the dependency. Signed-off-by: Jim Quinlan Cc: linux-mips@linux-mips.org Cc: David Daney Cc: Kevin Cernekee cernekee@gmail.com Cc: Jim Quinlan Patchwork: https://patchwork.linux-mips.org/patch/4320/ Signed-off-by: Ralf Baechle