diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-08-09 11:38:45 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-08-31 15:49:16 +0100 |
| commit | 7994cd9431e2b3980ea9b6ca5fbcf0fb2ede84d9 (patch) | |
| tree | f759bc18e17c96ceab4f5d14126a1e83c4bc0db1 | |
| parent | 2dde18cd1d8fac735875f2e4987f11817cc0bc2c (diff) | |
arm64: provide cpu_replace_ttbr1_phys()
Provide a version of cpu_replace_ttbr1_phys() which operates using a
physical address rather than the virtual address of the page tables.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm64/include/asm/mmu_context.h | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h index a6fb325424e7..42085b2b1d92 100644 --- a/arch/arm64/include/asm/mmu_context.h +++ b/arch/arm64/include/asm/mmu_context.h @@ -152,7 +152,7 @@ static inline void cpu_install_ttbr0(phys_addr_t ttbr0, unsigned long t0sz) * Atomically replaces the active TTBR1_EL1 PGD with a new VA-compatible PGD, * avoiding the possibility of conflicting TLB entries being allocated. */ -static inline void cpu_replace_ttbr1(pgd_t *pgdp, pgd_t *idmap) +static inline void cpu_replace_ttbr1_phys(phys_addr_t pgd_phys, pgd_t *idmap) { typedef void (ttbr_replace_func)(phys_addr_t); extern ttbr_replace_func idmap_cpu_replace_ttbr1; @@ -160,9 +160,10 @@ static inline void cpu_replace_ttbr1(pgd_t *pgdp, pgd_t *idmap) unsigned long daif; /* phys_to_ttbr() zeros lower 2 bits of ttbr with 52-bit PA */ - phys_addr_t ttbr1 = phys_to_ttbr(virt_to_phys(pgdp)); + phys_addr_t ttbr1 = phys_to_ttbr(pgd_phys); - if (system_supports_cnp() && !WARN_ON(pgdp != lm_alias(swapper_pg_dir))) { + if (system_supports_cnp() && + !WARN_ON(pgd_phys != virt_to_phys(lm_alias(swapper_pg_dir)))) { /* * cpu_replace_ttbr1() is used when there's a boot CPU * up (i.e. cpufeature framework is not up yet) and @@ -189,6 +190,11 @@ static inline void cpu_replace_ttbr1(pgd_t *pgdp, pgd_t *idmap) cpu_uninstall_idmap(); } +static inline void __nocfi cpu_replace_ttbr1(pgd_t *pgdp, pgd_t *idmap) +{ + cpu_replace_ttbr1_phys(virt_to_phys(pgdp), idmap); +} + /* * It would be nice to return ASIDs back to the allocator, but unfortunately * that introduces a race with a generation rollover where we could erroneously |