From: Yicong Yang <yangyicong@xxxxxxxxxxxxx>
0x35 indicates IMPLEMENTATION DEFINED fault for Unsupported Exclusive or
Atomic access. Add ESR_ELx_FSC definition and corresponding wrapper.
Signed-off-by: Yicong Yang <yangyicong@xxxxxxxxxxxxx>
---
arch/arm64/include/asm/esr.h | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h
index 94c9d537a7ad..1639e99f2bd6 100644
--- a/arch/arm64/include/asm/esr.h
+++ b/arch/arm64/include/asm/esr.h
@@ -122,6 +122,7 @@
#define ESR_ELx_FSC_SEA_TTW(n) (0x14 + (n))
#define ESR_ELx_FSC_SECC (0x18)
#define ESR_ELx_FSC_SECC_TTW(n) (0x1c + (n))
+#define ESR_ELx_FSC_EXCL_ATOMIC (0x35)
/* Status codes for individual page table levels */
#define ESR_ELx_FSC_ACCESS_L(n) (ESR_ELx_FSC_ACCESS + (n))
@@ -470,6 +471,13 @@ static inline bool esr_fsc_is_access_flag_fault(unsigned long esr)
(esr == ESR_ELx_FSC_ACCESS_L(0));
}
+static inline bool esr_fsc_is_excl_atomic_fault(unsigned long esr)
+{
+ esr = esr & ESR_ELx_FSC;
+
+ return esr == ESR_ELx_FSC_EXCL_ATOMIC;
+}
+
/* Indicate whether ESR.EC==0x1A is for an ERETAx instruction */
static inline bool esr_iss_is_eretax(unsigned long esr)
{
--
2.24.0
