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| author | Jason Andryuk <jason.andryuk@amd.com> | 2024-08-23 21:36:29 +0200 |
|---|---|---|
| committer | Juergen Gross <jgross@suse.com> | 2024-09-25 16:06:03 +0200 |
| commit | e3e8cd90f8e2eef67ded38f9c1a5f5520a407a62 (patch) | |
| tree | 54a6e15431d836fbff10d72ea9f34c1b6ef56155 /arch/x86/include | |
| parent | x86/pvh: Set phys_base when calling xen_prepare_pvh() (diff) | |
| download | linux-e3e8cd90f8e2eef67ded38f9c1a5f5520a407a62.tar.xz linux-e3e8cd90f8e2eef67ded38f9c1a5f5520a407a62.zip | |
x86/kernel: Move page table macros to header
The PVH entry point will need an additional set of prebuild page tables.
Move the macros and defines to pgtable_64.h, so they can be re-used.
Signed-off-by: Jason Andryuk <jason.andryuk@amd.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Acked-by: Dave Hansen <dave.hansen@linux.intel.com>
Message-ID: <20240823193630.2583107-5-jason.andryuk@amd.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/pgtable_64.h | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/arch/x86/include/asm/pgtable_64.h b/arch/x86/include/asm/pgtable_64.h index 3c4407271d08..72912b8edfdf 100644 --- a/arch/x86/include/asm/pgtable_64.h +++ b/arch/x86/include/asm/pgtable_64.h @@ -271,5 +271,26 @@ static inline bool gup_fast_permitted(unsigned long start, unsigned long end) #include <asm/pgtable-invert.h> -#endif /* !__ASSEMBLY__ */ +#else /* __ASSEMBLY__ */ + +#define l4_index(x) (((x) >> 39) & 511) +#define pud_index(x) (((x) >> PUD_SHIFT) & (PTRS_PER_PUD - 1)) + +L4_PAGE_OFFSET = l4_index(__PAGE_OFFSET_BASE_L4) +L4_START_KERNEL = l4_index(__START_KERNEL_map) + +L3_START_KERNEL = pud_index(__START_KERNEL_map) + +#define SYM_DATA_START_PAGE_ALIGNED(name) \ + SYM_START(name, SYM_L_GLOBAL, .balign PAGE_SIZE) + +/* Automate the creation of 1 to 1 mapping pmd entries */ +#define PMDS(START, PERM, COUNT) \ + i = 0 ; \ + .rept (COUNT) ; \ + .quad (START) + (i << PMD_SHIFT) + (PERM) ; \ + i = i + 1 ; \ + .endr + +#endif /* __ASSEMBLY__ */ #endif /* _ASM_X86_PGTABLE_64_H */ |