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qemu-e2k/target/arm/syndrome.h
Peter Maydell 5572f7557f target/arm: Implement the HFGITR_EL2.ERET trap 
Implement the HFGITR_EL2.ERET fine-grained trap.  This traps
execution from AArch64 EL1 of ERET, ERETAA and ERETAB.  The trap is
reported with a syndrome value of 0x1a.

The trap must take precedence over a possible pointer-authentication
trap for ERETAA and ERETAB.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Fuad Tabba <tabba@google.com>
Message-id: 20230130182459.3309057-21-peter.maydell@linaro.org
Message-id: 20230127175507.2895013-21-peter.maydell@linaro.org
2023-02-03 12:59:24 +00:00

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/*
* QEMU ARM CPU -- syndrome functions and types
*
* Copyright (c) 2014 Linaro Ltd
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, see
* <http://www.gnu.org/licenses/gpl-2.0.html>
*
* This header defines functions, types, etc which need to be shared
* between different source files within target/arm/ but which are
* private to it and not required by the rest of QEMU.
*/
#ifndef TARGET_ARM_SYNDROME_H
#define TARGET_ARM_SYNDROME_H
/* Valid Syndrome Register EC field values */
enum arm_exception_class {
EC_UNCATEGORIZED = 0x00,
EC_WFX_TRAP = 0x01,
EC_CP15RTTRAP = 0x03,
EC_CP15RRTTRAP = 0x04,
EC_CP14RTTRAP = 0x05,
EC_CP14DTTRAP = 0x06,
EC_ADVSIMDFPACCESSTRAP = 0x07,
EC_FPIDTRAP = 0x08,
EC_PACTRAP = 0x09,
EC_BXJTRAP = 0x0a,
EC_CP14RRTTRAP = 0x0c,
EC_BTITRAP = 0x0d,
EC_ILLEGALSTATE = 0x0e,
EC_AA32_SVC = 0x11,
EC_AA32_HVC = 0x12,
EC_AA32_SMC = 0x13,
EC_AA64_SVC = 0x15,
EC_AA64_HVC = 0x16,
EC_AA64_SMC = 0x17,
EC_SYSTEMREGISTERTRAP = 0x18,
EC_SVEACCESSTRAP = 0x19,
EC_ERETTRAP = 0x1a,
EC_SMETRAP = 0x1d,
EC_INSNABORT = 0x20,
EC_INSNABORT_SAME_EL = 0x21,
EC_PCALIGNMENT = 0x22,
EC_DATAABORT = 0x24,
EC_DATAABORT_SAME_EL = 0x25,
EC_SPALIGNMENT = 0x26,
EC_AA32_FPTRAP = 0x28,
EC_AA64_FPTRAP = 0x2c,
EC_SERROR = 0x2f,
EC_BREAKPOINT = 0x30,
EC_BREAKPOINT_SAME_EL = 0x31,
EC_SOFTWARESTEP = 0x32,
EC_SOFTWARESTEP_SAME_EL = 0x33,
EC_WATCHPOINT = 0x34,
EC_WATCHPOINT_SAME_EL = 0x35,
EC_AA32_BKPT = 0x38,
EC_VECTORCATCH = 0x3a,
EC_AA64_BKPT = 0x3c,
};
typedef enum {
SME_ET_AccessTrap,
SME_ET_Streaming,
SME_ET_NotStreaming,
SME_ET_InactiveZA,
} SMEExceptionType;
#define ARM_EL_EC_SHIFT 26
#define ARM_EL_IL_SHIFT 25
#define ARM_EL_ISV_SHIFT 24
#define ARM_EL_IL (1 << ARM_EL_IL_SHIFT)
#define ARM_EL_ISV (1 << ARM_EL_ISV_SHIFT)
static inline uint32_t syn_get_ec(uint32_t syn)
{
return syn >> ARM_EL_EC_SHIFT;
}
/*
* Utility functions for constructing various kinds of syndrome value.
* Note that in general we follow the AArch64 syndrome values; in a
* few cases the value in HSR for exceptions taken to AArch32 Hyp
* mode differs slightly, and we fix this up when populating HSR in
* arm_cpu_do_interrupt_aarch32_hyp().
* The exception is FP/SIMD access traps -- these report extra information
* when taking an exception to AArch32. For those we include the extra coproc
* and TA fields, and mask them out when taking the exception to AArch64.
*/
static inline uint32_t syn_uncategorized(void)
{
return (EC_UNCATEGORIZED << ARM_EL_EC_SHIFT) | ARM_EL_IL;
}
static inline uint32_t syn_aa64_svc(uint32_t imm16)
{
return (EC_AA64_SVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
}
static inline uint32_t syn_aa64_hvc(uint32_t imm16)
{
return (EC_AA64_HVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
}
static inline uint32_t syn_aa64_smc(uint32_t imm16)
{
return (EC_AA64_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
}
static inline uint32_t syn_aa32_svc(uint32_t imm16, bool is_16bit)
{
return (EC_AA32_SVC << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
| (is_16bit ? 0 : ARM_EL_IL);
}
static inline uint32_t syn_aa32_hvc(uint32_t imm16)
{
return (EC_AA32_HVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
}
static inline uint32_t syn_aa32_smc(void)
{
return (EC_AA32_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL;
}
static inline uint32_t syn_aa64_bkpt(uint32_t imm16)
{
return (EC_AA64_BKPT << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
}
static inline uint32_t syn_aa32_bkpt(uint32_t imm16, bool is_16bit)
{
return (EC_AA32_BKPT << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
| (is_16bit ? 0 : ARM_EL_IL);
}
static inline uint32_t syn_aa64_sysregtrap(int op0, int op1, int op2,
int crn, int crm, int rt,
int isread)
{
return (EC_SYSTEMREGISTERTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL
| (op0 << 20) | (op2 << 17) | (op1 << 14) | (crn << 10) | (rt << 5)
| (crm << 1) | isread;
}
static inline uint32_t syn_cp14_rt_trap(int cv, int cond, int opc1, int opc2,
int crn, int crm, int rt, int isread,
bool is_16bit)
{
return (EC_CP14RTTRAP << ARM_EL_EC_SHIFT)
| (is_16bit ? 0 : ARM_EL_IL)
| (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
| (crn << 10) | (rt << 5) | (crm << 1) | isread;
}
static inline uint32_t syn_cp15_rt_trap(int cv, int cond, int opc1, int opc2,
int crn, int crm, int rt, int isread,
bool is_16bit)
{
return (EC_CP15RTTRAP << ARM_EL_EC_SHIFT)
| (is_16bit ? 0 : ARM_EL_IL)
| (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
| (crn << 10) | (rt << 5) | (crm << 1) | isread;
}
static inline uint32_t syn_cp14_rrt_trap(int cv, int cond, int opc1, int crm,
int rt, int rt2, int isread,
bool is_16bit)
{
return (EC_CP14RRTTRAP << ARM_EL_EC_SHIFT)
| (is_16bit ? 0 : ARM_EL_IL)
| (cv << 24) | (cond << 20) | (opc1 << 16)
| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
}
static inline uint32_t syn_cp15_rrt_trap(int cv, int cond, int opc1, int crm,
int rt, int rt2, int isread,
bool is_16bit)
{
return (EC_CP15RRTTRAP << ARM_EL_EC_SHIFT)
| (is_16bit ? 0 : ARM_EL_IL)
| (cv << 24) | (cond << 20) | (opc1 << 16)
| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
}
static inline uint32_t syn_fp_access_trap(int cv, int cond, bool is_16bit,
int coproc)
{
/* AArch32 FP trap or any AArch64 FP/SIMD trap: TA == 0 */
return (EC_ADVSIMDFPACCESSTRAP << ARM_EL_EC_SHIFT)
| (is_16bit ? 0 : ARM_EL_IL)
| (cv << 24) | (cond << 20) | coproc;
}
static inline uint32_t syn_simd_access_trap(int cv, int cond, bool is_16bit)
{
/* AArch32 SIMD trap: TA == 1 coproc == 0 */
return (EC_ADVSIMDFPACCESSTRAP << ARM_EL_EC_SHIFT)
| (is_16bit ? 0 : ARM_EL_IL)
| (cv << 24) | (cond << 20) | (1 << 5);
}
static inline uint32_t syn_sve_access_trap(void)
{
return EC_SVEACCESSTRAP << ARM_EL_EC_SHIFT;
}
/*
* eret_op is bits [1:0] of the ERET instruction, so:
* 0 for ERET, 2 for ERETAA, 3 for ERETAB.
*/
static inline uint32_t syn_erettrap(int eret_op)
{
return (EC_ERETTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL | eret_op;
}
static inline uint32_t syn_smetrap(SMEExceptionType etype, bool is_16bit)
{
return (EC_SMETRAP << ARM_EL_EC_SHIFT)
| (is_16bit ? 0 : ARM_EL_IL) | etype;
}
static inline uint32_t syn_pactrap(void)
{
return EC_PACTRAP << ARM_EL_EC_SHIFT;
}
static inline uint32_t syn_btitrap(int btype)
{
return (EC_BTITRAP << ARM_EL_EC_SHIFT) | btype;
}
static inline uint32_t syn_bxjtrap(int cv, int cond, int rm)
{
return (EC_BXJTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL |
(cv << 24) | (cond << 20) | rm;
}
static inline uint32_t syn_insn_abort(int same_el, int ea, int s1ptw, int fsc)
{
return (EC_INSNABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| ARM_EL_IL | (ea << 9) | (s1ptw << 7) | fsc;
}
static inline uint32_t syn_data_abort_no_iss(int same_el, int fnv,
int ea, int cm, int s1ptw,
int wnr, int fsc)
{
return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| ARM_EL_IL
| (fnv << 10) | (ea << 9) | (cm << 8) | (s1ptw << 7)
| (wnr << 6) | fsc;
}
static inline uint32_t syn_data_abort_with_iss(int same_el,
int sas, int sse, int srt,
int sf, int ar,
int ea, int cm, int s1ptw,
int wnr, int fsc,
bool is_16bit)
{
return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| (is_16bit ? 0 : ARM_EL_IL)
| ARM_EL_ISV | (sas << 22) | (sse << 21) | (srt << 16)
| (sf << 15) | (ar << 14)
| (ea << 9) | (cm << 8) | (s1ptw << 7) | (wnr << 6) | fsc;
}
static inline uint32_t syn_swstep(int same_el, int isv, int ex)
{
return (EC_SOFTWARESTEP << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| ARM_EL_IL | (isv << 24) | (ex << 6) | 0x22;
}
static inline uint32_t syn_watchpoint(int same_el, int cm, int wnr)
{
return (EC_WATCHPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| ARM_EL_IL | (cm << 8) | (wnr << 6) | 0x22;
}
static inline uint32_t syn_breakpoint(int same_el)
{
return (EC_BREAKPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
| ARM_EL_IL | 0x22;
}
static inline uint32_t syn_wfx(int cv, int cond, int ti, bool is_16bit)
{
return (EC_WFX_TRAP << ARM_EL_EC_SHIFT) |
(is_16bit ? 0 : (1 << ARM_EL_IL_SHIFT)) |
(cv << 24) | (cond << 20) | ti;
}
static inline uint32_t syn_illegalstate(void)
{
return (EC_ILLEGALSTATE << ARM_EL_EC_SHIFT) | ARM_EL_IL;
}
static inline uint32_t syn_pcalignment(void)
{
return (EC_PCALIGNMENT << ARM_EL_EC_SHIFT) | ARM_EL_IL;
}
static inline uint32_t syn_serror(uint32_t extra)
{
return (EC_SERROR << ARM_EL_EC_SHIFT) | ARM_EL_IL | extra;
}
#endif /* TARGET_ARM_SYNDROME_H */
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