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[Qemu-devel] [kvm-unit-tests PATCH v5 06/11] lib/arm: add flush_tlb_page
From: |
Alex Bennée |
Subject: |
[Qemu-devel] [kvm-unit-tests PATCH v5 06/11] lib/arm: add flush_tlb_page mmu function |
Date: |
Fri, 31 Jul 2015 16:53:56 +0100 |
This introduces a new flush_tlb_page function which does exactly what
you expect. It's going to be useful for the future TLB torture test.
Signed-off-by: Alex Bennée <address@hidden>
---
lib/arm/asm/mmu.h | 11 +++++++++++
lib/arm64/asm/mmu.h | 8 ++++++++
2 files changed, 19 insertions(+)
diff --git a/lib/arm/asm/mmu.h b/lib/arm/asm/mmu.h
index c1bd01c..2bb0cde 100644
--- a/lib/arm/asm/mmu.h
+++ b/lib/arm/asm/mmu.h
@@ -14,8 +14,11 @@
#define PTE_AF PTE_EXT_AF
#define PTE_WBWA L_PTE_MT_WRITEALLOC
+/* See B3.18.7 TLB maintenance operations */
+
static inline void local_flush_tlb_all(void)
{
+ /* TLBIALL */
asm volatile("mcr p15, 0, %0, c8, c7, 0" :: "r" (0));
dsb();
isb();
@@ -27,6 +30,14 @@ static inline void flush_tlb_all(void)
local_flush_tlb_all();
}
+static inline void flush_tlb_page(unsigned long vaddr)
+{
+ /* TLBIMVAA */
+ asm volatile("mcr p15, 0, %0, c8, c7, 3" :: "r" (vaddr));
+ dsb();
+ isb();
+}
+
#include <asm/mmu-api.h>
#endif /* __ASMARM_MMU_H_ */
diff --git a/lib/arm64/asm/mmu.h b/lib/arm64/asm/mmu.h
index 18b4d6b..3bc31c9 100644
--- a/lib/arm64/asm/mmu.h
+++ b/lib/arm64/asm/mmu.h
@@ -19,6 +19,14 @@ static inline void flush_tlb_all(void)
isb();
}
+static inline void flush_tlb_page(unsigned long vaddr)
+{
+ unsigned long page = vaddr >> 12;
+ dsb(ishst);
+ asm("tlbi vaae1is, %0" :: "r" (page));
+ dsb(ish);
+}
+
#include <asm/mmu-api.h>
#endif /* __ASMARM64_MMU_H_ */
--
2.5.0
- [Qemu-devel] [kvm-unit-tests PATCH v5 01/11] arm/run: set indentation defaults for emacs, (continued)
- [Qemu-devel] [kvm-unit-tests PATCH v5 01/11] arm/run: set indentation defaults for emacs, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 02/11] README: add some CONTRIBUTING notes, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 04/11] arm/run: introduce usingkvm var and use it, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 05/11] lib/printf: support the %u unsigned fmt field, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 08/11] arm/unittests.cfg: add the tlbflush tests, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 03/11] configure: emit HOST=$host to config.mak, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 11/11] new: arm/barrier-test for memory barriers, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 06/11] lib/arm: add flush_tlb_page mmu function,
Alex Bennée <=
- [Qemu-devel] [kvm-unit-tests PATCH v5 07/11] new arm/tlbflush-test: TLB torture test, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 09/11] arm: query /dev/kvm for maximum vcpus, Alex Bennée, 2015/07/31
- [Qemu-devel] [kvm-unit-tests PATCH v5 10/11] new: add isaac prng library from CCAN, Alex Bennée, 2015/07/31