diff mbox series

[v2,5/6] arm64: Add ESR.DFSC definition of unsupported exclusive or atomic access

Message ID 20250331094320.35226-6-yangyicong@huawei.com (mailing list archive)
State New
Headers show
Series Add support for FEAT_{LS64, LS64_V} and related tests | expand

Commit Message

Yicong Yang March 31, 2025, 9:43 a.m. UTC 
From: Yicong Yang <yangyicong@hisilicon.com>

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@hisilicon.com>
---
 arch/arm64/include/asm/esr.h | 8 ++++++++
 1 file changed, 8 insertions(+)

Comments

Oliver Upton April 1, 2025, 4:15 p.m. UTC | #1 
On Mon, Mar 31, 2025 at 05:43:19PM +0800, Yicong Yang wrote:
> From: Yicong Yang <yangyicong@hisilicon.com>
> 
> 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@hisilicon.com>

Just squash this into the next patch. Adding a helper w/o any user
usually isn't a good idea.

Thanks,
Oliver
diff mbox series

Patch

diff --git a/arch/arm64/include/asm/esr.h b/arch/arm64/include/asm/esr.h
index d1b1a33f9a8b..2f357442f646 100644
--- a/arch/arm64/include/asm/esr.h
+++ b/arch/arm64/include/asm/esr.h
@@ -121,6 +121,7 @@ 
 #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))
@@ -464,6 +465,13 @@  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)
 {