diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-04-21 16:46:13 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-10-14 16:22:44 +0100 |
| commit | 5b05b079df42df655c3dae352c93d69b01337243 (patch) | |
| tree | e52b49da6ed9fb46abc87871fdaba897ddc03971 | |
| parent | fa8b039f930726e48394cb72d4b5fa312184794f (diff) | |
arm64: text replication: add node 0 page table definitions
Add a struct definition for the level zero page table group (the
optional trampoline page tables, reserved page tables, and swapper page
tables).
Add a symbol and extern declaration for the node 0 page table group.
Add an array of pointers to per-node page tables, which will default to
using the node 0 page table group.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm64/include/asm/pgtable.h | 14 | ||||
| -rw-r--r-- | arch/arm64/kernel/vmlinux.lds.S | 3 | ||||
| -rw-r--r-- | arch/arm64/mm/ktext.c | 4 |
3 files changed, 21 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 62caa54f4d21..fe1e2d62beda 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -615,6 +615,20 @@ extern pgd_t idmap_pg_dir[PTRS_PER_PGD]; extern pgd_t tramp_pg_dir[PTRS_PER_PGD]; extern pgd_t reserved_pg_dir[PTRS_PER_PGD]; +struct pgtables { +#ifdef CONFIG_UNMAP_KERNEL_AT_EL0 + pgd_t tramp_pg_dir[PTRS_PER_PGD]; +#endif + pgd_t reserved_pg_dir[PTRS_PER_PGD]; + pgd_t swapper_pg_dir[PTRS_PER_PGD]; +}; + +extern struct pgtables pgtable_node0; + +#ifdef CONFIG_REPLICATE_KTEXT +extern struct pgtables *pgtables[MAX_NUMNODES]; +#endif + extern void set_swapper_pgd(pgd_t *pgdp, pgd_t pgd); static inline bool in_swapper_pgdir(void *addr) diff --git a/arch/arm64/kernel/vmlinux.lds.S b/arch/arm64/kernel/vmlinux.lds.S index 3cd7e76cc562..d3c7ed76adbf 100644 --- a/arch/arm64/kernel/vmlinux.lds.S +++ b/arch/arm64/kernel/vmlinux.lds.S @@ -212,6 +212,9 @@ SECTIONS idmap_pg_dir = .; . += PAGE_SIZE; + /* pgtable struct - covers the tramp, reserved and swapper pgdirs */ + pgtable_node0 = .; + #ifdef CONFIG_UNMAP_KERNEL_AT_EL0 tramp_pg_dir = .; . += PAGE_SIZE; diff --git a/arch/arm64/mm/ktext.c b/arch/arm64/mm/ktext.c index 0017e7760d36..f3b61c73a337 100644 --- a/arch/arm64/mm/ktext.c +++ b/arch/arm64/mm/ktext.c @@ -15,6 +15,10 @@ #include <asm/ktext.h> #include <asm/memory.h> +struct pgtables *pgtables[MAX_NUMNODES] = { + [0 ... MAX_NUMNODES - 1] = &pgtable_node0, +}; + static void *kernel_texts[MAX_NUMNODES]; noinstr void ktext_replication_write(void *addr, void *data, size_t size) |