arm64: add explicit symbols to ESR_EL1 decoding
The ESR_EL1 decoding process is a bit cryptic, and KVM has also
a need for the same constants.
Add a new esr.h file containing the appropriate exception classes
constants, and change entry.S to use it. Fix a small bug in the
EL1 breakpoint check while we're at it.
Signed-off-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
index 514d609..c7e0470 100644
--- a/arch/arm64/kernel/entry.S
+++ b/arch/arm64/kernel/entry.S
@@ -24,6 +24,7 @@
#include <asm/assembler.h>
#include <asm/asm-offsets.h>
#include <asm/errno.h>
+#include <asm/esr.h>
#include <asm/thread_info.h>
#include <asm/unistd.h>
#include <asm/unistd32.h>
@@ -239,18 +240,18 @@
el1_sync:
kernel_entry 1
mrs x1, esr_el1 // read the syndrome register
- lsr x24, x1, #26 // exception class
- cmp x24, #0x25 // data abort in EL1
+ lsr x24, x1, #ESR_EL1_EC_SHIFT // exception class
+ cmp x24, #ESR_EL1_EC_DABT_EL1 // data abort in EL1
b.eq el1_da
- cmp x24, #0x18 // configurable trap
+ cmp x24, #ESR_EL1_EC_SYS64 // configurable trap
b.eq el1_undef
- cmp x24, #0x26 // stack alignment exception
+ cmp x24, #ESR_EL1_EC_SP_ALIGN // stack alignment exception
b.eq el1_sp_pc
- cmp x24, #0x22 // pc alignment exception
+ cmp x24, #ESR_EL1_EC_PC_ALIGN // pc alignment exception
b.eq el1_sp_pc
- cmp x24, #0x00 // unknown exception in EL1
+ cmp x24, #ESR_EL1_EC_UNKNOWN // unknown exception in EL1
b.eq el1_undef
- cmp x24, #0x30 // debug exception in EL1
+ cmp x24, #ESR_EL1_EC_BREAKPT_EL1 // debug exception in EL1
b.ge el1_dbg
b el1_inv
el1_da:
@@ -346,27 +347,27 @@
el0_sync:
kernel_entry 0
mrs x25, esr_el1 // read the syndrome register
- lsr x24, x25, #26 // exception class
- cmp x24, #0x15 // SVC in 64-bit state
+ lsr x24, x25, #ESR_EL1_EC_SHIFT // exception class
+ cmp x24, #ESR_EL1_EC_SVC64 // SVC in 64-bit state
b.eq el0_svc
adr lr, ret_from_exception
- cmp x24, #0x24 // data abort in EL0
+ cmp x24, #ESR_EL1_EC_DABT_EL0 // data abort in EL0
b.eq el0_da
- cmp x24, #0x20 // instruction abort in EL0
+ cmp x24, #ESR_EL1_EC_IABT_EL0 // instruction abort in EL0
b.eq el0_ia
- cmp x24, #0x07 // FP/ASIMD access
+ cmp x24, #ESR_EL1_EC_FP_ASIMD // FP/ASIMD access
b.eq el0_fpsimd_acc
- cmp x24, #0x2c // FP/ASIMD exception
+ cmp x24, #ESR_EL1_EC_FP_EXC64 // FP/ASIMD exception
b.eq el0_fpsimd_exc
- cmp x24, #0x18 // configurable trap
+ cmp x24, #ESR_EL1_EC_SYS64 // configurable trap
b.eq el0_undef
- cmp x24, #0x26 // stack alignment exception
+ cmp x24, #ESR_EL1_EC_SP_ALIGN // stack alignment exception
b.eq el0_sp_pc
- cmp x24, #0x22 // pc alignment exception
+ cmp x24, #ESR_EL1_EC_PC_ALIGN // pc alignment exception
b.eq el0_sp_pc
- cmp x24, #0x00 // unknown exception in EL0
+ cmp x24, #ESR_EL1_EC_UNKNOWN // unknown exception in EL0
b.eq el0_undef
- cmp x24, #0x30 // debug exception in EL0
+ cmp x24, #ESR_EL1_EC_BREAKPT_EL0 // debug exception in EL0
b.ge el0_dbg
b el0_inv
@@ -375,21 +376,21 @@
el0_sync_compat:
kernel_entry 0, 32
mrs x25, esr_el1 // read the syndrome register
- lsr x24, x25, #26 // exception class
- cmp x24, #0x11 // SVC in 32-bit state
+ lsr x24, x25, #ESR_EL1_EC_SHIFT // exception class
+ cmp x24, #ESR_EL1_EC_SVC32 // SVC in 32-bit state
b.eq el0_svc_compat
adr lr, ret_from_exception
- cmp x24, #0x24 // data abort in EL0
+ cmp x24, #ESR_EL1_EC_DABT_EL0 // data abort in EL0
b.eq el0_da
- cmp x24, #0x20 // instruction abort in EL0
+ cmp x24, #ESR_EL1_EC_IABT_EL0 // instruction abort in EL0
b.eq el0_ia
- cmp x24, #0x07 // FP/ASIMD access
+ cmp x24, #ESR_EL1_EC_FP_ASIMD // FP/ASIMD access
b.eq el0_fpsimd_acc
- cmp x24, #0x28 // FP/ASIMD exception
+ cmp x24, #ESR_EL1_EC_FP_EXC32 // FP/ASIMD exception
b.eq el0_fpsimd_exc
- cmp x24, #0x00 // unknown exception in EL0
+ cmp x24, #ESR_EL1_EC_UNKNOWN // unknown exception in EL0
b.eq el0_undef
- cmp x24, #0x30 // debug exception in EL0
+ cmp x24, #ESR_EL1_EC_BREAKPT_EL0 // debug exception in EL0
b.ge el0_dbg
b el0_inv
el0_svc_compat: