diff options
| author | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-05-16 15:57:35 +0100 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2023-10-30 12:56:07 +0000 |
| commit | 2eaffa1680e702cc852e261879996d97903d42f5 (patch) | |
| tree | 54b85bc8d33f92fd6c89b65501392b41b16df111 | |
| parent | c7db331d388f5d2fecf9be8b3117d4637c4f1b87 (diff) | |
arm64: text replication: update cnp support
Add changes for CNP (Common Not Private) support of kernel text
replication. Although text replication has only been tested on
dual-socket Ampere A1 systems, provided the different NUMA nodes
are not part of the same inner shareable domain, CNP should not
be a problem.
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm64/include/asm/mmu_context.h | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/cpufeature.c | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/suspend.c | 3 |
3 files changed, 4 insertions, 3 deletions
diff --git a/arch/arm64/include/asm/mmu_context.h b/arch/arm64/include/asm/mmu_context.h index 42085b2b1d92..36f6b1b65ae5 100644 --- a/arch/arm64/include/asm/mmu_context.h +++ b/arch/arm64/include/asm/mmu_context.h @@ -163,7 +163,7 @@ static inline void cpu_replace_ttbr1_phys(phys_addr_t pgd_phys, pgd_t *idmap) phys_addr_t ttbr1 = phys_to_ttbr(pgd_phys); if (system_supports_cnp() && - !WARN_ON(pgd_phys != virt_to_phys(lm_alias(swapper_pg_dir)))) { + !WARN_ON(pgd_phys != swapper_pg_dir_node_phys())) { /* * cpu_replace_ttbr1() is used when there's a boot CPU * up (i.e. cpufeature framework is not up yet) and diff --git a/arch/arm64/kernel/cpufeature.c b/arch/arm64/kernel/cpufeature.c index 444a73c2e638..fbc736fe8650 100644 --- a/arch/arm64/kernel/cpufeature.c +++ b/arch/arm64/kernel/cpufeature.c @@ -3422,7 +3422,7 @@ subsys_initcall_sync(init_32bit_el0_mask); static void __maybe_unused cpu_enable_cnp(struct arm64_cpu_capabilities const *cap) { - cpu_replace_ttbr1(lm_alias(swapper_pg_dir), idmap_pg_dir); + cpu_replace_ttbr1_phys(swapper_pg_dir_node_phys(), idmap_pg_dir); } /* diff --git a/arch/arm64/kernel/suspend.c b/arch/arm64/kernel/suspend.c index 0fbdf5fe64d8..49fa80bafd6d 100644 --- a/arch/arm64/kernel/suspend.c +++ b/arch/arm64/kernel/suspend.c @@ -55,7 +55,8 @@ void notrace __cpu_suspend_exit(void) /* Restore CnP bit in TTBR1_EL1 */ if (system_supports_cnp()) - cpu_replace_ttbr1(lm_alias(swapper_pg_dir), idmap_pg_dir); + cpu_replace_ttbr1_phys(swapper_pg_dir_node_phys(), + idmap_pg_dir); /* * PSTATE was not saved over suspend/resume, re-enable any detected |