projects/linux·commit ef7f594f

Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

ef7f594f · Linus Torvalds <[email protected]> · 2026-05-22 06:53:11 -07:00

Pull arm64 fixes from Catalin Marinas:

 - Handle probe on hinted conditional branch instructions.

   BC.cond instructions can be simulated in the same way as B.cond
   instructions, so extend the decode mask for B.cond to cover BC.cond

 - Flush the walk cache when unsharing PMD tables. Recent changes to
   huge_pmd_unshare() introduced mmu_gather::unshared_tables but the
   arm64 code was still treating the TLB flushing as only targeting leaf
   entries (TLBI VALE1IS).

   Fix it by using non-leaf-only instructions (TLBI VAE1IS) when
   tlb->unshared_tables is set

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: tlb: Flush walk cache when unsharing PMD tables
  arm64: probes: Handle probes on hinted conditional branch instructions
Commit
ef7f594f5d291a98a4da2cc95e7713d3971bedaa
Parents
cbadb98b · c2ff4764

Merge commit. Changes below are compared with the first parent: cbadb98b.

Changes

2 files changed · +3 −2

FileStatusAddDelContent
arch/arm64/include/asm/insn.hmodified+1−1View file
arch/arm64/include/asm/tlb.hmodified+2−1View file

arch/arm64/include/asm/insn.h

View file
diff --git a/arch/arm64/include/asm/insn.h b/arch/arm64/include/asm/insn.h
index f463a65..cc0702f 100644
--- a/arch/arm64/include/asm/insn.h
+++ b/arch/arm64/include/asm/insn.h
@@ -409,7 +409,7 @@ __AARCH64_INSN_FUNCS(cbz, 0x7F000000, 0x34000000)
__AARCH64_INSN_FUNCS(cbnz, 0x7F000000, 0x35000000)
__AARCH64_INSN_FUNCS(tbz, 0x7F000000, 0x36000000)
__AARCH64_INSN_FUNCS(tbnz, 0x7F000000, 0x37000000)
-__AARCH64_INSN_FUNCS(bcond, 0xFF000010, 0x54000000)
+__AARCH64_INSN_FUNCS(bcond, 0xFF000000, 0x54000000)
__AARCH64_INSN_FUNCS(svc, 0xFFE0001F, 0xD4000001)
__AARCH64_INSN_FUNCS(hvc, 0xFFE0001F, 0xD4000002)
__AARCH64_INSN_FUNCS(smc, 0xFFE0001F, 0xD4000003)

arch/arm64/include/asm/tlb.h

View file
diff --git a/arch/arm64/include/asm/tlb.h b/arch/arm64/include/asm/tlb.h
index 10869d7..751bd57 100644
--- a/arch/arm64/include/asm/tlb.h
+++ b/arch/arm64/include/asm/tlb.h
@@ -53,7 +53,8 @@ static inline int tlb_get_level(struct mmu_gather *tlb)
static inline void tlb_flush(struct mmu_gather *tlb)
{
struct vm_area_struct vma = TLB_FLUSH_VMA(tlb->mm, 0);
- tlbf_t flags = tlb->freed_tables ? TLBF_NONE : TLBF_NOWALKCACHE;
+ tlbf_t flags = (tlb->freed_tables || tlb->unshared_tables) ?
+ TLBF_NONE : TLBF_NOWALKCACHE;
unsigned long stride = tlb_get_unmap_size(tlb);
int tlb_level = tlb_get_level(tlb);