3 commits

Author	SHA1	Message	Date
Zong Li	5fde3db5eb	riscv: add ARCH_SUPPORTS_DEBUG_PAGEALLOC support ... ARCH_SUPPORTS_DEBUG_PAGEALLOC provides a hook to map and unmap pages for debugging purposes. Implement the __kernel_map_pages functions to fill the poison pattern. Signed-off-by: Zong Li <zong.li@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>	2020-03-26 09:24:36 -07:00
Zong Li	395a21ff85	riscv: add ARCH_HAS_SET_DIRECT_MAP support ... Add set_direct_map_*() functions for setting the direct map alias for the page to its default permissions and to an invalid state that cannot be cached in a TLB. (See d253ca0c ("x86/mm/cpa: Add set_direct_map_*() functions")) Add a similar implementation for RISC-V. Signed-off-by: Zong Li <zong.li@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>	2020-03-26 09:24:33 -07:00
Zong Li	d3ab332a50	riscv: add ARCH_HAS_SET_MEMORY support ... Add set_memory_ro/rw/x/nx architecture hooks to change the page attribution. Use own set_memory.h rather than generic set_memory.h (i.e. include/asm-generic/set_memory.h), because we want to add other function prototypes here. Signed-off-by: Zong Li <zong.li@sifive.com> Signed-off-by: Palmer Dabbelt <palmerdabbelt@google.com>	2020-03-26 09:24:30 -07:00