unimore/kernel-hacking-2024-linux-steffo
unimore/kernel-hacking-2024-linux-steffo
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Merge patch the fixes from "riscv: 64-bit NOMMU fixes and enhancements"

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These two patches are fixes that the feature depends on, but they also
fix generic issues.  So I'm picking them up for fixes as well as
for-next.

* commit 'aea702dde7e9876fb00571a2602f25130847bf0f':
  riscv: Fix loading 64-bit NOMMU kernels past the start of RAM
  riscv: Fix TASK_SIZE on 64-bit NOMMU

Link: https://lore.kernel.org/r/20240227003630.3634533-1-samuel.holland@sifive.com
Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
This commit is contained in:
Palmer Dabbelt 2024-04-09 11:41:01 -07:00
commit a373a36fb6
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3 changed files with 3 additions and 3 deletions
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2
arch/riscv/include/asm/page.h
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@ -89,7 +89,7 @@ typedef struct page *pgtable_t;
#define PTE_FMT "%08lx"
#endif
#ifdef CONFIG_64BIT
#if defined(CONFIG_64BIT) && defined(CONFIG_MMU)
/*
* We override this value as its generic definition uses __pa too early in
* the boot process (before kernel_map.va_pa_offset is set).

2
arch/riscv/include/asm/pgtable.h
View file

@ -896,7 +896,7 @@ static inline pte_t pte_swp_clear_exclusive(pte_t pte)
#define PAGE_SHARED __pgprot(0)
#define PAGE_KERNEL __pgprot(0)
#define swapper_pg_dir NULL
#define TASK_SIZE 0xffffffffUL
#define TASK_SIZE _AC(-1, UL)
#define VMALLOC_START _AC(0, UL)
#define VMALLOC_END TASK_SIZE

2
arch/riscv/mm/init.c
View file

@ -231,7 +231,7 @@ static void __init setup_bootmem(void)
* In 64-bit, any use of __va/__pa before this point is wrong as we
* did not know the start of DRAM before.
*/
if (IS_ENABLED(CONFIG_64BIT))
if (IS_ENABLED(CONFIG_64BIT) && IS_ENABLED(CONFIG_MMU))
kernel_map.va_pa_offset = PAGE_OFFSET - phys_ram_base;
/*