arm64: Add a facility to turn an ESR syndrome into a sysreg encoding (d251f67a) · Commits · 戴 / test

It is often useful to compare an ESR syndrome reporting the trapping of a system register with a value matching that system register. Since encoding both the sysreg and the ESR version seem to be a bit overkill, let's add a set of macros that convert an ESR value into the corresponding sysreg encoding. We handle both AArch32 and AArch64, taking advantage of identical encodings between system registers and CP15 accessors. Tested-by:

Alexander Graf <agraf@suse.de> Acked-by:

David Daney <david.daney@cavium.com> Acked-by:

Mark Rutland <mark.rutland@arm.com> Acked-by:

Catalin Marinas <catalin.marinas@arm.com> Reviewed-by:

Eric Auger <eric.auger@redhat.com> Signed-off-by:

Marc Zyngier <marc.zyngier@arm.com> Signed-off-by:

Christoffer Dall <cdall@linaro.org>

arch/arm64/include/asm/esr.h

+24 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@
		#define __ASM_ESR_H

		#include <asm/memory.h>
		#include <asm/sysreg.h>

		#define ESR_ELx_EC_UNKNOWN (0x00)
		#define ESR_ELx_EC_WFx (0x01)
		@@ -181,6 +182,29 @@
		#define ESR_ELx_SYS64_ISS_SYS_CNTFRQ (ESR_ELx_SYS64_ISS_SYS_VAL(3, 3, 0, 14, 0) \| \
		ESR_ELx_SYS64_ISS_DIR_READ)

		#define esr_sys64_to_sysreg(e) \
		sys_reg((((e) & ESR_ELx_SYS64_ISS_OP0_MASK) >> \
		ESR_ELx_SYS64_ISS_OP0_SHIFT), \
		(((e) & ESR_ELx_SYS64_ISS_OP1_MASK) >> \
		ESR_ELx_SYS64_ISS_OP1_SHIFT), \
		(((e) & ESR_ELx_SYS64_ISS_CRN_MASK) >> \
		ESR_ELx_SYS64_ISS_CRN_SHIFT), \
		(((e) & ESR_ELx_SYS64_ISS_CRM_MASK) >> \
		ESR_ELx_SYS64_ISS_CRM_SHIFT), \
		(((e) & ESR_ELx_SYS64_ISS_OP2_MASK) >> \
		ESR_ELx_SYS64_ISS_OP2_SHIFT))

		#define esr_cp15_to_sysreg(e) \
		sys_reg(3, \
		(((e) & ESR_ELx_SYS64_ISS_OP1_MASK) >> \
		ESR_ELx_SYS64_ISS_OP1_SHIFT), \
		(((e) & ESR_ELx_SYS64_ISS_CRN_MASK) >> \
		ESR_ELx_SYS64_ISS_CRN_SHIFT), \
		(((e) & ESR_ELx_SYS64_ISS_CRM_MASK) >> \
		ESR_ELx_SYS64_ISS_CRM_SHIFT), \
		(((e) & ESR_ELx_SYS64_ISS_OP2_MASK) >> \
		ESR_ELx_SYS64_ISS_OP2_SHIFT))

		#ifndef __ASSEMBLY__
		#include <asm/types.h>

Admin message