bybrooklyn/linux
1
0
Fork 0
mirror of https://github.com/torvalds/linux.git synced 2026-04-18 06:44:00 -04:00
Code Issues Packages Projects Releases Wiki Activity

Merge tag 'riscv-for-linus-6.15-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux

Browse Source 
Pull RISC-V updates from Palmer Dabbelt:

 - The sub-architecture selection Kconfig system has been cleaned up,
   the documentation has been improved, and various detections have been
   fixed

 - The vector-related extensions dependencies are now validated when
   parsing from device tree and in the DT bindings

 - Misaligned access probing can be overridden via a kernel command-line
   parameter, along with various fixes to misalign access handling

 - Support for relocatable !MMU kernels builds

 - Support for hpge pfnmaps, which should improve TLB utilization

 - Support for runtime constants, which improves the d_hash()
   performance

 - Support for bfloat16, Zicbom, Zaamo, Zalrsc, Zicntr, Zihpm

 - Various fixes, including:
      - We were missing a secondary mmu notifier call when flushing the
        tlb which is required for IOMMU
      - Fix ftrace panics by saving the registers as expected by ftrace
      - Fix a couple of stimecmp usage related to cpu hotplug
      - purgatory_start is now aligned as per the STVEC requirements
      - A fix for hugetlb when calculating the size of non-present PTEs

* tag 'riscv-for-linus-6.15-mw1' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux: (65 commits)
  riscv: Add norvc after .option arch in runtime const
  riscv: Make sure toolchain supports zba before using zba instructions
  riscv/purgatory: 4B align purgatory_start
  riscv/kexec_file: Handle R_RISCV_64 in purgatory relocator
  selftests: riscv: fix v_exec_initval_nolibc.c
  riscv: Fix hugetlb retrieval of number of ptes in case of !present pte
  riscv: print hartid on bringup
  riscv: Add norvc after .option arch in runtime const
  riscv: Remove CONFIG_PAGE_OFFSET
  riscv: Support CONFIG_RELOCATABLE on riscv32
  asm-generic: Always define Elf_Rel and Elf_Rela
  riscv: Support CONFIG_RELOCATABLE on NOMMU
  riscv: Allow NOMMU kernels to access all of RAM
  riscv: Remove duplicate CONFIG_PAGE_OFFSET definition
  RISC-V: errata: Use medany for relocatable builds
  dt-bindings: riscv: document vector crypto requirements
  dt-bindings: riscv: add vector sub-extension dependencies
  dt-bindings: riscv: d requires f
  RISC-V: add f & d extension validation checks
  RISC-V: add vector crypto extension validation checks
  ...
This commit is contained in:
Linus Torvalds
2025-04-04 09:49:17 -07:00
parent 61f96e684e 3eb64093f5
commit 4a1d8ababd
62 changed files with 1255 additions and 404 deletions
Download Patch File Download Diff File Expand all files Collapse all files

97
arch/riscv/mm/init.c
View File

@@ -20,15 +20,13 @@
#include <linux/dma-map-ops.h>
#include <linux/crash_dump.h>
#include <linux/hugetlb.h>
#ifdef CONFIG_RELOCATABLE
#include <linux/elf.h>
#endif
#include <linux/kfence.h>
#include <linux/execmem.h>
#include <asm/fixmap.h>
#include <asm/io.h>
#include <asm/kasan.h>
#include <asm/module.h>
#include <asm/numa.h>
#include <asm/pgtable.h>
#include <asm/sections.h>
@@ -320,6 +318,44 @@ static void __init setup_bootmem(void)
hugetlb_cma_reserve(PUD_SHIFT - PAGE_SHIFT);
}
#ifdef CONFIG_RELOCATABLE
extern unsigned long __rela_dyn_start, __rela_dyn_end;
static void __init relocate_kernel(void)
{
Elf_Rela *rela = (Elf_Rela *)&__rela_dyn_start;
/*
* This holds the offset between the linked virtual address and the
* relocated virtual address.
*/
uintptr_t reloc_offset = kernel_map.virt_addr - KERNEL_LINK_ADDR;
/*
* This holds the offset between kernel linked virtual address and
* physical address.
*/
uintptr_t va_kernel_link_pa_offset = KERNEL_LINK_ADDR - kernel_map.phys_addr;
for ( ; rela < (Elf_Rela *)&__rela_dyn_end; rela++) {
Elf_Addr addr = (rela->r_offset - va_kernel_link_pa_offset);
Elf_Addr relocated_addr = rela->r_addend;
if (rela->r_info != R_RISCV_RELATIVE)
continue;
/*
* Make sure to not relocate vdso symbols like rt_sigreturn
* which are linked from the address 0 in vmlinux since
* vdso symbol addresses are actually used as an offset from
* mm->context.vdso in VDSO_OFFSET macro.
*/
if (relocated_addr >= KERNEL_LINK_ADDR)
relocated_addr += reloc_offset;
*(Elf_Addr *)addr = relocated_addr;
}
}
#endif /* CONFIG_RELOCATABLE */
#ifdef CONFIG_MMU
struct pt_alloc_ops pt_ops __meminitdata;
@@ -820,6 +856,8 @@ static __init void set_satp_mode(uintptr_t dtb_pa)
uintptr_t set_satp_mode_pmd = ((unsigned long)set_satp_mode) & PMD_MASK;
u64 satp_mode_cmdline = __pi_set_satp_mode_from_cmdline(dtb_pa);
kernel_map.page_offset = PAGE_OFFSET_L5;
if (satp_mode_cmdline == SATP_MODE_57) {
disable_pgtable_l5();
} else if (satp_mode_cmdline == SATP_MODE_48) {
@@ -890,44 +928,6 @@ retry:
#error "setup_vm() is called from head.S before relocate so it should not use absolute addressing."
#endif
#ifdef CONFIG_RELOCATABLE
extern unsigned long __rela_dyn_start, __rela_dyn_end;
static void __init relocate_kernel(void)
{
Elf64_Rela *rela = (Elf64_Rela *)&__rela_dyn_start;
/*
* This holds the offset between the linked virtual address and the
* relocated virtual address.
*/
uintptr_t reloc_offset = kernel_map.virt_addr - KERNEL_LINK_ADDR;
/*
* This holds the offset between kernel linked virtual address and
* physical address.
*/
uintptr_t va_kernel_link_pa_offset = KERNEL_LINK_ADDR - kernel_map.phys_addr;
for ( ; rela < (Elf64_Rela *)&__rela_dyn_end; rela++) {
Elf64_Addr addr = (rela->r_offset - va_kernel_link_pa_offset);
Elf64_Addr relocated_addr = rela->r_addend;
if (rela->r_info != R_RISCV_RELATIVE)
continue;
/*
* Make sure to not relocate vdso symbols like rt_sigreturn
* which are linked from the address 0 in vmlinux since
* vdso symbol addresses are actually used as an offset from
* mm->context.vdso in VDSO_OFFSET macro.
*/
if (relocated_addr >= KERNEL_LINK_ADDR)
relocated_addr += reloc_offset;
*(Elf64_Addr *)addr = relocated_addr;
}
}
#endif /* CONFIG_RELOCATABLE */
#ifdef CONFIG_XIP_KERNEL
static void __init create_kernel_page_table(pgd_t *pgdir,
__always_unused bool early)
@@ -1105,11 +1105,6 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
kernel_map.virt_addr = KERNEL_LINK_ADDR + kernel_map.virt_offset;
#ifdef CONFIG_XIP_KERNEL
#ifdef CONFIG_64BIT
kernel_map.page_offset = PAGE_OFFSET_L3;
#else
kernel_map.page_offset = _AC(CONFIG_PAGE_OFFSET, UL);
#endif
kernel_map.xiprom = (uintptr_t)CONFIG_XIP_PHYS_ADDR;
kernel_map.xiprom_sz = (uintptr_t)(&_exiprom) - (uintptr_t)(&_xiprom);
@@ -1124,7 +1119,6 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
kernel_map.va_kernel_xip_data_pa_offset = kernel_map.virt_addr - kernel_map.phys_addr
+ (uintptr_t)&_sdata - (uintptr_t)&_start;
#else
kernel_map.page_offset = _AC(CONFIG_PAGE_OFFSET, UL);
kernel_map.phys_addr = (uintptr_t)(&_start);
kernel_map.size = (uintptr_t)(&_end) - kernel_map.phys_addr;
kernel_map.va_kernel_pa_offset = kernel_map.virt_addr - kernel_map.phys_addr;
@@ -1171,7 +1165,8 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
* makes the kernel cross over a PUD_SIZE boundary, raise a bug
* since a part of the kernel would not get mapped.
*/
BUG_ON(PUD_SIZE - (kernel_map.virt_addr & (PUD_SIZE - 1)) < kernel_map.size);
if (IS_ENABLED(CONFIG_64BIT))
BUG_ON(PUD_SIZE - (kernel_map.virt_addr & (PUD_SIZE - 1)) < kernel_map.size);
relocate_kernel();
#endif
@@ -1375,6 +1370,12 @@ asmlinkage void __init setup_vm(uintptr_t dtb_pa)
{
dtb_early_va = (void *)dtb_pa;
dtb_early_pa = dtb_pa;
#ifdef CONFIG_RELOCATABLE
kernel_map.virt_addr = (uintptr_t)_start;
kernel_map.phys_addr = (uintptr_t)_start;
relocate_kernel();
#endif
}
static inline void setup_vm_final(void)