Both sparc64 and powerpc64 use tlb_flush() to flush their respective
hash-tables which is entirely different from what
flush_tlb_range()/flush_tlb_mm() would do.
Powerpc64 already uses arch_*_lazy_mmu_mode() to batch and flush these
so any tlb_flush() caller should already find an empty batch, make
sparc64 do the same.
This ensures all platforms now have a tlb_flush() implementation that
is either flush_tlb_mm() or flush_tlb_range().
Cc: David Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx>
---
arch/sparc/Makefile | 1 +
arch/sparc/include/asm/tlb_64.h | 2 +-
arch/sparc/include/asm/tlbflush_64.h | 11 +++++++++++
3 files changed, 13 insertions(+), 1 deletion(-)
--- a/arch/sparc/Makefile
+++ b/arch/sparc/Makefile
@@ -37,6 +37,7 @@ LDFLAGS := -m elf64_sparc
export BITS := 64
UTS_MACHINE := sparc64
+KBUILD_CPPFLAGS += -D__HAVE_ARCH_ENTER_LAZY_MMU_MODE
KBUILD_CFLAGS += -m64 -pipe -mno-fpu -mcpu=ultrasparc -mcmodel=medlow
KBUILD_CFLAGS += -ffixed-g4 -ffixed-g5 -fcall-used-g7 -Wno-sign-compare
KBUILD_CFLAGS += -Wa,--undeclared-regs
--- a/arch/sparc/include/asm/tlb_64.h
+++ b/arch/sparc/include/asm/tlb_64.h
@@ -25,7 +25,7 @@ extern void flush_tlb_pending(void);
#define tlb_start_vma(tlb, vma) do { } while (0)
#define tlb_end_vma(tlb, vma) do { } while (0)
#define __tlb_remove_tlb_entry(tlb, ptep, address) do { } while (0)
-#define tlb_flush(tlb) flush_tlb_pending()
+#define tlb_flush(tlb) do { } while (0)
#include <asm-generic/tlb.h>
--- a/arch/sparc/include/asm/tlbflush_64.h
+++ b/arch/sparc/include/asm/tlbflush_64.h
@@ -26,6 +26,17 @@ extern void flush_tlb_pending(void);
#define flush_tlb_page(vma,addr) flush_tlb_pending()
#define flush_tlb_mm(mm) flush_tlb_pending()
+static inline void arch_enter_lazy_mmu_mode(void)
+{
+}
+
+static inline void arch_leave_lazy_mmu_mode(void)
+{
+ flush_tlb_pending();
+}
+
+#define arch_flush_lazy_mmu_mode() do {} while (0)
+
/* Local cpu only. */
extern void __flush_tlb_all(void);
--
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