[PATCH v4 3/6] arm64: Add tlbi_user_level TLB invalidation helper
From: Zhenyu Ye <hidden>
Date: 2020-06-02 13:59:18
Also in:
linux-arch, linux-mm, lkml
Subsystem:
arm64 port (aarch64 architecture), the rest · Maintainers:
Catalin Marinas, Will Deacon, Linus Torvalds
Add a level-hinted parameter to __tlbi_user, which only gets used if ARMv8.4-TTL gets detected. ARMv8.4-TTL provides the TTL field in tlbi instruction to indicate the level of translation table walk holding the leaf entry for the address that is being invalidated. This patch set the default level value of flush_tlb_range() to 0, which will be updated in future patches. And set the ttl value of flush_tlb_page_nosync() to 3 because it is only called to flush a single pte page. Signed-off-by: Zhenyu Ye <redacted> --- arch/arm64/include/asm/tlbflush.h | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-)
diff --git a/arch/arm64/include/asm/tlbflush.h b/arch/arm64/include/asm/tlbflush.h
index 8adbd6fd8489..bfb58e62c127 100644
--- a/arch/arm64/include/asm/tlbflush.h
+++ b/arch/arm64/include/asm/tlbflush.h@@ -88,6 +88,12 @@ __tlbi(op, arg); \ } while (0) +#define __tlbi_user_level(op, arg, level) do { \ + if (arm64_kernel_unmapped_at_el0()) \ + __tlbi_level(op, (arg | USER_ASID_FLAG), level); \ +} while (0) + + /* * TLB Invalidation * ================
@@ -189,8 +195,9 @@ static inline void flush_tlb_page_nosync(struct vm_area_struct *vma, unsigned long addr = __TLBI_VADDR(uaddr, ASID(vma->vm_mm)); dsb(ishst); - __tlbi(vale1is, addr); - __tlbi_user(vale1is, addr); + /* This function is only called on a small page */ + __tlbi_level(vale1is, addr, 3); + __tlbi_user_level(vale1is, addr, 3); } static inline void flush_tlb_page(struct vm_area_struct *vma,
@@ -230,11 +237,11 @@ static inline void __flush_tlb_range(struct vm_area_struct *vma, dsb(ishst); for (addr = start; addr < end; addr += stride) { if (last_level) { - __tlbi(vale1is, addr); - __tlbi_user(vale1is, addr); + __tlbi_level(vale1is, addr, 0); + __tlbi_user_level(vale1is, addr, 0); } else { - __tlbi(vae1is, addr); - __tlbi_user(vae1is, addr); + __tlbi_level(vae1is, addr, 0); + __tlbi_user_level(vae1is, addr, 0); } } dsb(ish);
--
2.19.1
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