Merge branch 'for-next/mte' into for-next/core

* for-next/mte:
  kasan: Extend KASAN mode kernel parameter
  arm64: mte: Add asymmetric mode support
  arm64: mte: CPU feature detection for Asymm MTE
  arm64: mte: Bitfield definitions for Asymm MTE
  kasan: Remove duplicate of kasan_flag_async
  arm64: kasan: mte: move GCR_EL1 switch to task switch when KASAN disabled

5 files changed, 15 insertions, 6 deletions

diff --git a/arch/arm64/include/asm/memory.h b/arch/arm64/include/asm/memory.h
index f1745a843414..1b9a1e242612 100644
--- a/arch/arm64/include/asm/memory.h
+++ b/arch/arm64/include/asm/memory.h
@@ -243,6 +243,7 @@ static inline const void *__tag_set(const void *addr, u8 tag)
 #ifdef CONFIG_KASAN_HW_TAGS
 #define arch_enable_tagging_sync()		mte_enable_kernel_sync()
 #define arch_enable_tagging_async()		mte_enable_kernel_async()
+#define arch_enable_tagging_asymm()		mte_enable_kernel_asymm()
 #define arch_force_async_tag_fault()		mte_check_tfsr_exit()
 #define arch_get_random_tag()			mte_get_random_tag()
 #define arch_get_mem_tag(addr)			mte_get_mem_tag(addr)
diff --git a/arch/arm64/include/asm/mte-kasan.h b/arch/arm64/include/asm/mte-kasan.h
index 22420e1f8c03..478b9bcf69ad 100644
--- a/arch/arm64/include/asm/mte-kasan.h
+++ b/arch/arm64/include/asm/mte-kasan.h
@@ -130,6 +130,7 @@ static inline void mte_set_mem_tag_range(void *addr, size_t size, u8 tag,
 
 void mte_enable_kernel_sync(void);
 void mte_enable_kernel_async(void);
+void mte_enable_kernel_asymm(void);
 
 #else /* CONFIG_ARM64_MTE */
 
@@ -161,6 +162,10 @@ static inline void mte_enable_kernel_async(void)
 {
 }
 
+static inline void mte_enable_kernel_asymm(void)
+{
+}
+
 #endif /* CONFIG_ARM64_MTE */
 
 #endif /* __ASSEMBLY__ */
diff --git a/arch/arm64/include/asm/mte.h b/arch/arm64/include/asm/mte.h
index 02511650cffe..075539f5f1c8 100644
--- a/arch/arm64/include/asm/mte.h
+++ b/arch/arm64/include/asm/mte.h
@@ -88,11 +88,11 @@ static inline int mte_ptrace_copy_tags(struct task_struct *child,
 
 #ifdef CONFIG_KASAN_HW_TAGS
 /* Whether the MTE asynchronous mode is enabled. */
-DECLARE_STATIC_KEY_FALSE(mte_async_mode);
+DECLARE_STATIC_KEY_FALSE(mte_async_or_asymm_mode);
 
-static inline bool system_uses_mte_async_mode(void)
+static inline bool system_uses_mte_async_or_asymm_mode(void)
 {
-	return static_branch_unlikely(&mte_async_mode);
+	return static_branch_unlikely(&mte_async_or_asymm_mode);
 }
 
 void mte_check_tfsr_el1(void);
@@ -121,7 +121,7 @@ static inline void mte_check_tfsr_exit(void)
 	mte_check_tfsr_el1();
 }
 #else
-static inline bool system_uses_mte_async_mode(void)
+static inline bool system_uses_mte_async_or_asymm_mode(void)
 {
 	return false;
 }
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index f649cd27c986..027dbe004df4 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -626,6 +626,7 @@
 #define SCTLR_ELx_TCF_NONE	(UL(0x0) << SCTLR_ELx_TCF_SHIFT)
 #define SCTLR_ELx_TCF_SYNC	(UL(0x1) << SCTLR_ELx_TCF_SHIFT)
 #define SCTLR_ELx_TCF_ASYNC	(UL(0x2) << SCTLR_ELx_TCF_SHIFT)
+#define SCTLR_ELx_TCF_ASYMM	(UL(0x3) << SCTLR_ELx_TCF_SHIFT)
 #define SCTLR_ELx_TCF_MASK	(UL(0x3) << SCTLR_ELx_TCF_SHIFT)
 
 #define SCTLR_ELx_ENIA_SHIFT	31
@@ -671,6 +672,7 @@
 #define SCTLR_EL1_TCF0_NONE	(UL(0x0) << SCTLR_EL1_TCF0_SHIFT)
 #define SCTLR_EL1_TCF0_SYNC	(UL(0x1) << SCTLR_EL1_TCF0_SHIFT)
 #define SCTLR_EL1_TCF0_ASYNC	(UL(0x2) << SCTLR_EL1_TCF0_SHIFT)
+#define SCTLR_EL1_TCF0_ASYMM	(UL(0x3) << SCTLR_EL1_TCF0_SHIFT)
 #define SCTLR_EL1_TCF0_MASK	(UL(0x3) << SCTLR_EL1_TCF0_SHIFT)
 
 #define SCTLR_EL1_BT1		(BIT(36))
@@ -812,6 +814,7 @@
 #define ID_AA64PFR1_MTE_NI		0x0
 #define ID_AA64PFR1_MTE_EL0		0x1
 #define ID_AA64PFR1_MTE			0x2
+#define ID_AA64PFR1_MTE_ASYMM		0x3
 
 /* id_aa64zfr0 */
 #define ID_AA64ZFR0_F64MM_SHIFT		56
diff --git a/arch/arm64/include/asm/uaccess.h b/arch/arm64/include/asm/uaccess.h
index 9bc218991c5a..6e2e0b7031ab 100644
--- a/arch/arm64/include/asm/uaccess.h
+++ b/arch/arm64/include/asm/uaccess.h
@@ -191,13 +191,13 @@ static inline void __uaccess_enable_tco(void)
  */
 static inline void __uaccess_disable_tco_async(void)
 {
-	if (system_uses_mte_async_mode())
+	if (system_uses_mte_async_or_asymm_mode())
 		 __uaccess_disable_tco();
 }
 
 static inline void __uaccess_enable_tco_async(void)
 {
-	if (system_uses_mte_async_mode())
+	if (system_uses_mte_async_or_asymm_mode())
 		__uaccess_enable_tco();
 }