riscv: rename sptbr to satp
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Web: https://git.kernel.org/torvalds/c/7549cdf59d9fafbaab42650375c29c64c16aa270 Commit: 7549cdf59d9fafbaab42650375c29c64c16aa270 Parent: 372def1f934134cb391234ccdf23c21ae94343c2 Refname: refs/heads/master Author: Christoph Hellwig <[email protected]> AuthorDate: Tue Jan 9 15:00:32 2018 +0100 Committer: Palmer Dabbelt <[email protected]> CommitDate: Tue Jan 30 19:16:12 2018 -0800 riscv: rename sptbr to satp satp is the name used by the current privileged spec 1.10, use it instead of the old name. The most recent release binutils release (2.29) doesn't know about the satp name yet, so stick to the name from the previous privileged ISA release and comment on the fact. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: Palmer Dabbelt <[email protected]> --- arch/riscv/include/asm/csr.h | 14 +++++++------- arch/riscv/include/asm/mmu_context.h | 7 ++++++- arch/riscv/kernel/head.S | 6 +++--- arch/riscv/mm/fault.c | 4 ++++ 4 files changed, 20 insertions(+), 11 deletions(-) diff --git a/arch/riscv/include/asm/csr.h b/arch/riscv/include/asm/csr.h index 3c7a2c97e377..421fa3585798 100644 --- a/arch/riscv/include/asm/csr.h +++ b/arch/riscv/include/asm/csr.h @@ -40,15 +40,15 @@ #define SR_SD _AC(0x8000000000000000, UL) /* FS/XS dirty */ #endif -/* SPTBR flags */ +/* SATP flags */ #if __riscv_xlen == 32 -#define SPTBR_PPN _AC(0x003FFFFF, UL) -#define SPTBR_MODE_32 _AC(0x80000000, UL) -#define SPTBR_MODE SPTBR_MODE_32 +#define SATP_PPN _AC(0x003FFFFF, UL) +#define SATP_MODE_32 _AC(0x80000000, UL) +#define SATP_MODE SATP_MODE_32 #else -#define SPTBR_PPN _AC(0x00000FFFFFFFFFFF, UL) -#define SPTBR_MODE_39 _AC(0x8000000000000000, UL) -#define SPTBR_MODE SPTBR_MODE_39 +#define SATP_PPN _AC(0x00000FFFFFFFFFFF, UL) +#define SATP_MODE_39 _AC(0x8000000000000000, UL) +#define SATP_MODE SATP_MODE_39 #endif /* Interrupt Enable and Interrupt Pending flags */ diff --git a/arch/riscv/include/asm/mmu_context.h b/arch/riscv/include/asm/mmu_context.h index 082ef8652ac7..d30f0c54b8b2 100644 --- a/arch/riscv/include/asm/mmu_context.h +++ b/arch/riscv/include/asm/mmu_context.h @@ -41,7 +41,12 @@ static inline void destroy_context(struct mm_struct *mm) static inline void set_pgdir(pgd_t *pgd) { - csr_write(sptbr, virt_to_pfn(pgd) | SPTBR_MODE); + /* + * 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); } /* diff --git a/arch/riscv/kernel/head.S b/arch/riscv/kernel/head.S index 78f670d70133..226eeb190f90 100644 --- a/arch/riscv/kernel/head.S +++ b/arch/riscv/kernel/head.S @@ -74,15 +74,15 @@ relocate: sub a1, a1, a0 add ra, ra, a1 - /* Point stvec to virtual address of intruction after sptbr write */ + /* Point stvec to virtual address of intruction after satp write */ la a0, 1f add a0, a0, a1 csrw stvec, a0 - /* Compute sptbr for kernel page tables, but don't load it yet */ + /* Compute satp for kernel page tables, but don't load it yet */ la a2, swapper_pg_dir srl a2, a2, PAGE_SHIFT - li a1, SPTBR_MODE + li a1, SATP_MODE or a2, a2, a1 /* diff --git a/arch/riscv/mm/fault.c b/arch/riscv/mm/fault.c index 0713f3c67ab4..06c5621970ae 100644 --- a/arch/riscv/mm/fault.c +++ b/arch/riscv/mm/fault.c @@ -239,6 +239,10 @@ vmalloc_fault: * Do _not_ use "tsk->active_mm->pgd" here. * We might be inside an interrupt in the middle * of a task switch. + * + * Note: 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. */ index = pgd_index(addr); pgd = (pgd_t *)pfn_to_virt(csr_read(sptbr)) + index; -- To unsubscribe from this list: send the line "unsubscribe git-commits-head" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html