These patch set are used for enabling ISH DMA on EHL platform. During ISH DMA enabling, some platforms (such as EHL) don't support cache snooping, bus driver (ishtp) has to involve a new callback, dma_no_cache_snooping(), in hardware layer (ipc) to get hardware DMA capability. When do cache flush, clflush_cache_range() API is used on X86 which isn't supported by all other archs (such as ARM). Considering ISH only exists on Intel platforms, adding ISH depending on X86 in Kconfig to avoid build warnings or errors on other archs. Even Xu (3): hid: intel-ish-hid: Set ISH driver depends on x86 hid: intel-ish-hid: ishtp: Add dma_no_cache_snooping() callback hid: intel-ish-hid: ipc: Specify that EHL no cache snooping drivers/hid/intel-ish-hid/Kconfig | 1 + drivers/hid/intel-ish-hid/ipc/ipc.c | 26 +++++++++++++++++++++++++- drivers/hid/intel-ish-hid/ishtp/client.c | 18 ++++++++++++++++++ drivers/hid/intel-ish-hid/ishtp/ishtp-dev.h | 1 + 4 files changed, 45 insertions(+), 1 deletion(-) -- 2.7.4
