169c593f78
The syndrome register value always has an IL field at bit 25, which is 0 for a trap on a 16 bit instruction, and 1 for a trap on a 32 bit instruction (or for exceptions which aren't traps on a known instruction, like PC alignment faults). This means that our syn_*() functions should always either take an is_16bit argument to determine whether to set the IL bit, or else unconditionally set it. We missed setting the IL bit for the syndrome for three kinds of trap: * an SVE access exception * a pointer authentication check failure * a BTI (branch target identification) check failure All of these traps are AArch64 only, and so the instruction causing the trap is always 64 bit. This means we can unconditionally set the IL bit in the syn_*() function. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20231120150121.3458408-1-peter.maydell@linaro.org Cc: qemu-stable@nongnu.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> (cherry picked from commit 11a3c4a286d5dc603582ea0a1fca62c2ec0a1aee) Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
331 lines
11 KiB
C
331 lines
11 KiB
C
/*
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* QEMU ARM CPU -- syndrome functions and types
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*
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* Copyright (c) 2014 Linaro Ltd
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, see
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* <http://www.gnu.org/licenses/gpl-2.0.html>
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*
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* This header defines functions, types, etc which need to be shared
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* between different source files within target/arm/ but which are
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* private to it and not required by the rest of QEMU.
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*/
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#ifndef TARGET_ARM_SYNDROME_H
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#define TARGET_ARM_SYNDROME_H
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/* Valid Syndrome Register EC field values */
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enum arm_exception_class {
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EC_UNCATEGORIZED = 0x00,
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EC_WFX_TRAP = 0x01,
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EC_CP15RTTRAP = 0x03,
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EC_CP15RRTTRAP = 0x04,
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EC_CP14RTTRAP = 0x05,
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EC_CP14DTTRAP = 0x06,
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EC_ADVSIMDFPACCESSTRAP = 0x07,
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EC_FPIDTRAP = 0x08,
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EC_PACTRAP = 0x09,
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EC_BXJTRAP = 0x0a,
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EC_CP14RRTTRAP = 0x0c,
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EC_BTITRAP = 0x0d,
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EC_ILLEGALSTATE = 0x0e,
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EC_AA32_SVC = 0x11,
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EC_AA32_HVC = 0x12,
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EC_AA32_SMC = 0x13,
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EC_AA64_SVC = 0x15,
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EC_AA64_HVC = 0x16,
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EC_AA64_SMC = 0x17,
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EC_SYSTEMREGISTERTRAP = 0x18,
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EC_SVEACCESSTRAP = 0x19,
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EC_ERETTRAP = 0x1a,
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EC_SMETRAP = 0x1d,
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EC_GPC = 0x1e,
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EC_INSNABORT = 0x20,
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EC_INSNABORT_SAME_EL = 0x21,
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EC_PCALIGNMENT = 0x22,
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EC_DATAABORT = 0x24,
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EC_DATAABORT_SAME_EL = 0x25,
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EC_SPALIGNMENT = 0x26,
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EC_AA32_FPTRAP = 0x28,
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EC_AA64_FPTRAP = 0x2c,
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EC_SERROR = 0x2f,
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EC_BREAKPOINT = 0x30,
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EC_BREAKPOINT_SAME_EL = 0x31,
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EC_SOFTWARESTEP = 0x32,
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EC_SOFTWARESTEP_SAME_EL = 0x33,
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EC_WATCHPOINT = 0x34,
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EC_WATCHPOINT_SAME_EL = 0x35,
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EC_AA32_BKPT = 0x38,
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EC_VECTORCATCH = 0x3a,
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EC_AA64_BKPT = 0x3c,
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};
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typedef enum {
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SME_ET_AccessTrap,
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SME_ET_Streaming,
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SME_ET_NotStreaming,
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SME_ET_InactiveZA,
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} SMEExceptionType;
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#define ARM_EL_EC_SHIFT 26
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#define ARM_EL_IL_SHIFT 25
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#define ARM_EL_ISV_SHIFT 24
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#define ARM_EL_IL (1 << ARM_EL_IL_SHIFT)
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#define ARM_EL_ISV (1 << ARM_EL_ISV_SHIFT)
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static inline uint32_t syn_get_ec(uint32_t syn)
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{
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return syn >> ARM_EL_EC_SHIFT;
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}
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/*
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* Utility functions for constructing various kinds of syndrome value.
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* Note that in general we follow the AArch64 syndrome values; in a
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* few cases the value in HSR for exceptions taken to AArch32 Hyp
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* mode differs slightly, and we fix this up when populating HSR in
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* arm_cpu_do_interrupt_aarch32_hyp().
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* The exception is FP/SIMD access traps -- these report extra information
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* when taking an exception to AArch32. For those we include the extra coproc
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* and TA fields, and mask them out when taking the exception to AArch64.
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*/
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static inline uint32_t syn_uncategorized(void)
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{
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return (EC_UNCATEGORIZED << ARM_EL_EC_SHIFT) | ARM_EL_IL;
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}
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static inline uint32_t syn_aa64_svc(uint32_t imm16)
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{
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return (EC_AA64_SVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa64_hvc(uint32_t imm16)
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{
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return (EC_AA64_HVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa64_smc(uint32_t imm16)
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{
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return (EC_AA64_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa32_svc(uint32_t imm16, bool is_16bit)
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{
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return (EC_AA32_SVC << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
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| (is_16bit ? 0 : ARM_EL_IL);
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}
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static inline uint32_t syn_aa32_hvc(uint32_t imm16)
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{
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return (EC_AA32_HVC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa32_smc(void)
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{
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return (EC_AA32_SMC << ARM_EL_EC_SHIFT) | ARM_EL_IL;
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}
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static inline uint32_t syn_aa64_bkpt(uint32_t imm16)
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{
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return (EC_AA64_BKPT << ARM_EL_EC_SHIFT) | ARM_EL_IL | (imm16 & 0xffff);
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}
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static inline uint32_t syn_aa32_bkpt(uint32_t imm16, bool is_16bit)
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{
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return (EC_AA32_BKPT << ARM_EL_EC_SHIFT) | (imm16 & 0xffff)
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| (is_16bit ? 0 : ARM_EL_IL);
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}
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static inline uint32_t syn_aa64_sysregtrap(int op0, int op1, int op2,
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int crn, int crm, int rt,
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int isread)
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{
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return (EC_SYSTEMREGISTERTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL
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| (op0 << 20) | (op2 << 17) | (op1 << 14) | (crn << 10) | (rt << 5)
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| (crm << 1) | isread;
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}
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static inline uint32_t syn_cp14_rt_trap(int cv, int cond, int opc1, int opc2,
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int crn, int crm, int rt, int isread,
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bool is_16bit)
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{
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return (EC_CP14RTTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
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| (crn << 10) | (rt << 5) | (crm << 1) | isread;
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}
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static inline uint32_t syn_cp15_rt_trap(int cv, int cond, int opc1, int opc2,
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int crn, int crm, int rt, int isread,
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bool is_16bit)
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{
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return (EC_CP15RTTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (opc2 << 17) | (opc1 << 14)
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| (crn << 10) | (rt << 5) | (crm << 1) | isread;
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}
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static inline uint32_t syn_cp14_rrt_trap(int cv, int cond, int opc1, int crm,
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int rt, int rt2, int isread,
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bool is_16bit)
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{
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return (EC_CP14RRTTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (opc1 << 16)
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| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
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}
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static inline uint32_t syn_cp15_rrt_trap(int cv, int cond, int opc1, int crm,
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int rt, int rt2, int isread,
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bool is_16bit)
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{
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return (EC_CP15RRTTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (opc1 << 16)
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| (rt2 << 10) | (rt << 5) | (crm << 1) | isread;
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}
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static inline uint32_t syn_fp_access_trap(int cv, int cond, bool is_16bit,
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int coproc)
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{
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/* AArch32 FP trap or any AArch64 FP/SIMD trap: TA == 0 */
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return (EC_ADVSIMDFPACCESSTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | coproc;
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}
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static inline uint32_t syn_simd_access_trap(int cv, int cond, bool is_16bit)
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{
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/* AArch32 SIMD trap: TA == 1 coproc == 0 */
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return (EC_ADVSIMDFPACCESSTRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| (cv << 24) | (cond << 20) | (1 << 5);
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}
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static inline uint32_t syn_sve_access_trap(void)
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{
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return (EC_SVEACCESSTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL;
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}
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/*
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* eret_op is bits [1:0] of the ERET instruction, so:
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* 0 for ERET, 2 for ERETAA, 3 for ERETAB.
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*/
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static inline uint32_t syn_erettrap(int eret_op)
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{
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return (EC_ERETTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL | eret_op;
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}
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static inline uint32_t syn_smetrap(SMEExceptionType etype, bool is_16bit)
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{
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return (EC_SMETRAP << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL) | etype;
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}
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static inline uint32_t syn_pactrap(void)
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{
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return (EC_PACTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL;
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}
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static inline uint32_t syn_btitrap(int btype)
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{
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return (EC_BTITRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL | btype;
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}
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static inline uint32_t syn_bxjtrap(int cv, int cond, int rm)
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{
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return (EC_BXJTRAP << ARM_EL_EC_SHIFT) | ARM_EL_IL |
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(cv << 24) | (cond << 20) | rm;
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}
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static inline uint32_t syn_gpc(int s2ptw, int ind, int gpcsc,
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int cm, int s1ptw, int wnr, int fsc)
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{
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/* TODO: FEAT_NV2 adds VNCR */
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return (EC_GPC << ARM_EL_EC_SHIFT) | ARM_EL_IL | (s2ptw << 21)
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| (ind << 20) | (gpcsc << 14) | (cm << 8) | (s1ptw << 7)
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| (wnr << 6) | fsc;
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}
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static inline uint32_t syn_insn_abort(int same_el, int ea, int s1ptw, int fsc)
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{
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return (EC_INSNABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL | (ea << 9) | (s1ptw << 7) | fsc;
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}
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static inline uint32_t syn_data_abort_no_iss(int same_el, int fnv,
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int ea, int cm, int s1ptw,
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int wnr, int fsc)
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{
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return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL
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| (fnv << 10) | (ea << 9) | (cm << 8) | (s1ptw << 7)
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| (wnr << 6) | fsc;
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}
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static inline uint32_t syn_data_abort_with_iss(int same_el,
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int sas, int sse, int srt,
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int sf, int ar,
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int ea, int cm, int s1ptw,
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int wnr, int fsc,
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bool is_16bit)
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{
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return (EC_DATAABORT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| (is_16bit ? 0 : ARM_EL_IL)
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| ARM_EL_ISV | (sas << 22) | (sse << 21) | (srt << 16)
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| (sf << 15) | (ar << 14)
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| (ea << 9) | (cm << 8) | (s1ptw << 7) | (wnr << 6) | fsc;
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}
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static inline uint32_t syn_swstep(int same_el, int isv, int ex)
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{
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return (EC_SOFTWARESTEP << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL | (isv << 24) | (ex << 6) | 0x22;
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}
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static inline uint32_t syn_watchpoint(int same_el, int cm, int wnr)
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{
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return (EC_WATCHPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL | (cm << 8) | (wnr << 6) | 0x22;
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}
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static inline uint32_t syn_breakpoint(int same_el)
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{
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return (EC_BREAKPOINT << ARM_EL_EC_SHIFT) | (same_el << ARM_EL_EC_SHIFT)
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| ARM_EL_IL | 0x22;
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}
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static inline uint32_t syn_wfx(int cv, int cond, int ti, bool is_16bit)
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{
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return (EC_WFX_TRAP << ARM_EL_EC_SHIFT) |
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(is_16bit ? 0 : (1 << ARM_EL_IL_SHIFT)) |
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(cv << 24) | (cond << 20) | ti;
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}
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static inline uint32_t syn_illegalstate(void)
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{
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return (EC_ILLEGALSTATE << ARM_EL_EC_SHIFT) | ARM_EL_IL;
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}
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static inline uint32_t syn_pcalignment(void)
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{
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return (EC_PCALIGNMENT << ARM_EL_EC_SHIFT) | ARM_EL_IL;
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}
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static inline uint32_t syn_serror(uint32_t extra)
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{
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return (EC_SERROR << ARM_EL_EC_SHIFT) | ARM_EL_IL | extra;
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}
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#endif /* TARGET_ARM_SYNDROME_H */
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