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Merge tag 'riscv-for-linus-5.15-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

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Pull RISC-V updates from Palmer Dabbelt:

 - support PC-relative instructions (auipc and branches) in kprobes

 - support for forced IRQ threading

 - support for the hlt/nohlt kernel command line options, via the
   generic idle loop

 - show the edge/level triggered behavior of interrupts
   in /proc/interrupts

 - a handful of cleanups to our address mapping mechanisms

 - support for allocating gigantic hugepages via CMA

 - support for the undefined behavior sanitizer (UBSAN)

 - a handful of cleanups to the VDSO that allow the kernel to build with
   LLD.

 - support for hugepage migration

* tag 'riscv-for-linus-5.15-mw0' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (21 commits)
  riscv: add support for hugepage migration
  RISC-V: Fix VDSO build for !MMU
  riscv: use strscpy to replace strlcpy
  riscv: explicitly use symbol offsets for VDSO
  riscv: Enable Undefined Behavior Sanitizer UBSAN
  riscv: Keep the riscv Kconfig selects sorted
  riscv: Support allocating gigantic hugepages using CMA
  riscv: fix the global name pfn_base confliction error
  riscv: Move early fdt mapping creation in its own function
  riscv: Simplify BUILTIN_DTB device tree mapping handling
  riscv: Use __maybe_unused instead of #ifdefs around variable declarations
  riscv: Get rid of map_size parameter to create_kernel_page_table
  riscv: Introduce va_kernel_pa_offset for 32-bit kernel
  riscv: Optimize kernel virtual address conversion macro
  dt-bindings: riscv: add starfive jh7100 bindings
  riscv: Enable GENERIC_IRQ_SHOW_LEVEL
  riscv: Enable idle generic idle loop
  riscv: Allow forced irq threading
  riscv: Implement thread_struct whitelist for hardened usercopy
  riscv: kprobes: implement the branch instructions
  ...
This commit is contained in:
Linus Torvalds
2021-09-05 11:31:23 -07:00
parent 3fe617ccaf c24a196742
commit 063df71a57
13 changed files with 256 additions and 127 deletions
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21
arch/riscv/include/asm/page.h
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@@ -79,8 +79,8 @@ typedef struct page *pgtable_t;
#endif
#ifdef CONFIG_MMU
extern unsigned long pfn_base;
#define ARCH_PFN_OFFSET (pfn_base)
extern unsigned long riscv_pfn_base;
#define ARCH_PFN_OFFSET (riscv_pfn_base)
#else
#define ARCH_PFN_OFFSET (PAGE_OFFSET >> PAGE_SHIFT)
#endif /* CONFIG_MMU */
@@ -91,10 +91,8 @@ struct kernel_mapping {
uintptr_t size;
/* Offset between linear mapping virtual address and kernel load address */
unsigned long va_pa_offset;
#ifdef CONFIG_64BIT
/* Offset between kernel mapping virtual address and kernel load address */
unsigned long va_kernel_pa_offset;
#endif
unsigned long va_kernel_xip_pa_offset;
#ifdef CONFIG_XIP_KERNEL
uintptr_t xiprom;
@@ -105,11 +103,11 @@ struct kernel_mapping {
extern struct kernel_mapping kernel_map;
extern phys_addr_t phys_ram_base;
#ifdef CONFIG_64BIT
#define is_kernel_mapping(x) \
((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size))
#define is_linear_mapping(x) \
((x) >= PAGE_OFFSET && (x) < kernel_map.virt_addr)
((x) >= PAGE_OFFSET && (!IS_ENABLED(CONFIG_64BIT) || (x) < kernel_map.virt_addr))
#define linear_mapping_pa_to_va(x) ((void *)((unsigned long)(x) + kernel_map.va_pa_offset))
#define kernel_mapping_pa_to_va(y) ({ \
@@ -123,7 +121,7 @@ extern phys_addr_t phys_ram_base;
#define linear_mapping_va_to_pa(x) ((unsigned long)(x) - kernel_map.va_pa_offset)
#define kernel_mapping_va_to_pa(y) ({ \
unsigned long _y = y; \
(_y < kernel_map.virt_addr + XIP_OFFSET) ? \
(IS_ENABLED(CONFIG_XIP_KERNEL) && _y < kernel_map.virt_addr + XIP_OFFSET) ? \
((unsigned long)(_y) - kernel_map.va_kernel_xip_pa_offset) : \
((unsigned long)(_y) - kernel_map.va_kernel_pa_offset - XIP_OFFSET); \
})
@@ -133,15 +131,6 @@ extern phys_addr_t phys_ram_base;
is_linear_mapping(_x) ? \
linear_mapping_va_to_pa(_x) : kernel_mapping_va_to_pa(_x); \
})
#else
#define is_kernel_mapping(x) \
((x) >= kernel_map.virt_addr && (x) < (kernel_map.virt_addr + kernel_map.size))
#define is_linear_mapping(x) \
((x) >= PAGE_OFFSET)
#define __pa_to_va_nodebug(x) ((void *)((unsigned long) (x) + kernel_map.va_pa_offset))
#define __va_to_pa_nodebug(x) ((unsigned long)(x) - kernel_map.va_pa_offset)
#endif /* CONFIG_64BIT */
#ifdef CONFIG_DEBUG_VIRTUAL
extern phys_addr_t __virt_to_phys(unsigned long x);