diff options
author | Anup Patel <Anup.Patel@wdc.com> | 2019-04-25 11:38:41 +0300 |
---|---|---|
committer | Palmer Dabbelt <palmer@sifive.com> | 2019-05-17 06:42:11 +0300 |
commit | a3182c91ef4e7dda90ff080a4132efd3ecb8786a (patch) | |
tree | 5309b2480f3c6bb9e6df4d7921c7a71ce18dcc4d /arch/riscv/include/asm/mmu_context.h | |
parent | 6dcaf00487ca10d87e53fc8decb2e30f113c955d (diff) | |
download | linux-a3182c91ef4e7dda90ff080a4132efd3ecb8786a.tar.xz |
RISC-V: Access CSRs using CSR numbers
We should prefer accessing CSRs using their CSR numbers because:
1. It compiles fine with older toolchains.
2. We can use latest CSR names in #define macro names of CSR numbers
as-per RISC-V spec.
3. We can access newly added CSRs even if toolchain does not recognize
newly addes CSRs by name.
Signed-off-by: Anup Patel <anup.patel@wdc.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Diffstat (limited to 'arch/riscv/include/asm/mmu_context.h')
-rw-r--r-- | arch/riscv/include/asm/mmu_context.h | 7 |
1 files changed, 1 insertions, 6 deletions
diff --git a/arch/riscv/include/asm/mmu_context.h b/arch/riscv/include/asm/mmu_context.h index 336d60ec5698..98c76c821367 100644 --- a/arch/riscv/include/asm/mmu_context.h +++ b/arch/riscv/include/asm/mmu_context.h @@ -83,12 +83,7 @@ static inline void switch_mm(struct mm_struct *prev, cpumask_clear_cpu(cpu, mm_cpumask(prev)); cpumask_set_cpu(cpu, mm_cpumask(next)); - /* - * Use the old spbtr name instead of using the current satp - * name to support binutils 2.29 which doesn't know about the - * privileged ISA 1.10 yet. - */ - csr_write(sptbr, virt_to_pfn(next->pgd) | SATP_MODE); + csr_write(CSR_SATP, virt_to_pfn(next->pgd) | SATP_MODE); local_flush_tlb_all(); flush_icache_deferred(next); |