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2016-03-04target-arm: Only trap SRS from S-EL1 if specified mode is MONRalf-Philipp Weinmann
Commit cbc0326b6fb9 caused SRS instructions executed from Secure EL1 to trap to EL3 even if the specified mode was not monitor mode. According to the ARMv8 Architecture reference manual [F6.1.203], ALL of the following conditions need to be met for SRS to trap to EL3: * It is executed at Secure PL1. * The specified mode is monitor mode. * EL3 is using AArch64. Correct the condition governing the trap to EL3 to check the specified mode. Signed-off-by: Ralf-Philipp Weinmann <ralf+devel@comsecuris.com> Message-id: 20160222224251.GA11654@beta.comsecuris.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: tweaked comment text to read 'specified mode'; edited commit message] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: implement BE32 mode in system emulationPaolo Bonzini
System emulation only has a little-endian target; BE32 mode is implemented by adjusting the low bits of the address for every byte and halfword load and store. 64-bit accesses flip the low and high words. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [PC changes: * rebased against master (Jan 2016) ] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: implement setendPaolo Bonzini
Since this is not a high-performance path, just use a helper to flip the E bit and force a lookup in the hash table since the flags have changed. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: introduce tbflag for endiannessPeter Crosthwaite
Introduce a tbflags for endianness, set based upon the CPUs current endianness. This in turn propagates through to the disas endianness flag. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: a64: Add endianness supportPeter Crosthwaite
Set the dc->mo_endianness flag for AA64 and use it in all ldst ops. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: introduce disas flag for endiannessPaolo Bonzini
Introduce a disas flag for setting the CPU data endianness. This allows control of the endianness from the CPU state rather than hard-coding it to TARGET_WORDS_BIGENDIAN. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [ PC changes: * Split off as new patch from original: "target-arm: introduce tbflag for CPSR.E" * Wrote commit message from scratch ] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: pass DisasContext to gen_aa32_ld*/st*Paolo Bonzini
We'll need the DisasContext in the next patch to retrieve the desired endianness, so pass it as a whole to gen_aa32_ld*/st*. Unfortunately we cannot let those functions call get_mem_index, because of user-mode load/store instructions. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [ PC changes: * Fix long lines ] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: implement SCTLR.EEPeter Crosthwaite
Implement SCTLR.EE bit which controls data endianess for exceptions and page table translations. SCTLR.EE is mirrored to the CPSR.E bit on exception entry. Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04linux-user: arm: handle CPSR.E correctly in strex emulationPaolo Bonzini
Now that CPSR.E is set correctly, prepare for when setend will be able to change it; bswap data in and out of strex manually by comparing SCTLR.B, CPSR.E and TARGET_WORDS_BIGENDIAN (we do not have the luxury of using TCGMemOps). Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [ PC changes: * Moved SCTLR/CPSR logic to arm_cpu_data_is_big_endian ] Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04arm: cpu: handle BE32 user-mode as BEPeter Crosthwaite
endian with address manipulations on subword accesses (to give the illusion of BE). But user-mode cannot tell the difference and is already implemented as straight BE. So handle the difference in the endianess query, where USER mode is BE and system is not. Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: cpu: Move cpu_is_big_endian to headerPeter Crosthwaite
There is a CPU data endianness test that is used to drive the virtio_big_endian test. Move this up to the header so it can be more generally used for endian tests. The KVM specific cpu_syncronize_state call is left behind in the virtio specific function. Rename it arm_cpu-data_is_big_endian() to more accurately capture that this is for data accesses only. Reviewed-by: Alistair Francis <alistair.francis@xilinx.com> Signed-off-by: Peter Crosthwaite <peter.crosthwaite@xilinx.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: implement SCTLR.B, drop bswap_codePaolo Bonzini
bswap_code is a CPU property of sorts ("is the iside endianness the opposite way round to TARGET_WORDS_BIGENDIAN?") but it is not the actual CPU state involved here which is SCTLR.B (set for BE32 binaries, clear for BE8). Replace bswap_code with SCTLR.B, and pass that to arm_ld*_code. The next patches will make data fetches honor both SCTLR.B and CPSR.E appropriately. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> [PC changes: * rebased on master (Jan 2016) * s/TARGET_USER_ONLY/CONFIG_USER_ONLY * Use bswap_code() for disas_set_info() instead of raw sctlr_b ] Signed-off-by: Peter Crosthwaite <crosthwaite.peter@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-03-04target-arm: Correct handling of writes to CPSR mode bits from gdb in usermodePeter Maydell
In helper.c the expression (env->uncached_cpsr & CPSR_M) != CPSR_USER is always true; the right hand side was supposed to be ARM_CPU_MODE_USR (an error in commit cb01d391). Since the incorrect expression was always true, this just meant that commit cb01d391 had no effect. However simply changing the RHS here would reveal a logic error: if the mode is USR we wish to completely ignore the attempt to set the mode bits, which means that we must clear the CPSR_M bits from mask to avoid the uncached_cpsr bits being updated at the end of the function. Move the condition into the correct place in the code, fix its RHS constant, and add a comment about the fact that we must be doing a gdbstub write if we're in user mode. Fixes: https://bugs.launchpad.net/qemu/+bug/1550503 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1456764438-30015-1-git-send-email-peter.maydell@linaro.org
2016-03-01tcg: Add type for vCPU pointersLluís Vilanova
Adds the 'TCGv_env' type for pointers to 'CPUArchState' objects. The tracing infrastructure later needs to differentiate between regular pointers and pointers to vCPUs. Also changes all targets to use the new 'TCGv_env' type instead of the generic 'TCGv_ptr'. As of now, the change is merely cosmetic ('TCGv_env' translates into 'TCGv_ptr'), but that could change in the future to enforce the difference. Note that a 'TCGv_env' type (for 'CPUState') is not added, since all helpers currently receive the architecture-specific pointer ('CPUArchState'). Signed-off-by: Lluís Vilanova <vilanova@ac.upc.edu> Acked-by: Richard Henderson <rth@twiddle.net> Message-id: 145641859552.30295.7821536833590725201.stgit@localhost Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2016-02-26target-arm: Make reserved ranges in ID_AA64* spaces RAZ, not UNDEFPeter Maydell
The v8 ARM ARM defines that unused spaces in the ID_AA64* system register ranges are Reserved and must RAZ, rather than being UNDEF. Implement this. In particular, ARM v8.2 adds a new feature register ID_AA64MMFR2, and newer versions of the Linux kernel will attempt to read this, which causes them not to boot up on versions of QEMU missing this fix. Since the encoding .opc0 = 3, .opc1 = 0, .crn = 0, .crm = 2, .opc2 = 6 is actually defined in ARMv8 (as ID_MMFR4), we give it an entry in the ARMCPU struct so CPUs can override it, though since none do this too will just RAZ. Cc: qemu-stable@nongnu.org Reported-by: Ard Biesheuvel <ard.biesheuvel@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1455890863-11203-1-git-send-email-peter.maydell@linaro.org Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Tested-by: Alex Bennée <alex.bennee@linaro.org>
2016-02-26target-arm: Mark CNTHP_TVAL_EL2 as ARM_CP_NO_RAWEdgar E. Iglesias
Mark CNTHP_TVAL_EL2 as ARM_CP_NO_RAW due to the register not having any underlying state. This fixes an issue with booting KVM enabled kernels when EL2 is on. Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 1456490739-19343-1-git-send-email-edgar.iglesias@gmail.com Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-02-26target-arm: Implement MDCR_EL3.TPM and MDCR_EL2.TPM trapsPeter Maydell
Implement the performance monitor register traps controlled by MDCR_EL3.TPM and MDCR_EL2.TPM. Most of the performance registers already have an access function to deal with the user-enable bit, and the TPM checks can be added there. We also need a new access function which only implements the TPM checks for use by the few not-EL0-accessible registers and by PMUSERENR_EL0 (which is always EL0-readable). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1455892784-11328-3-git-send-email-peter.maydell@linaro.org Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Acked-by: Alistair Francis <alistair.francis@xilinx.com>
2016-02-26target-arm: Fix handling of SDCR for 32-bit codePeter Maydell
Fix two issues with our implementation of the SDCR: * it is only present from ARMv8 onwards * it does not contain several of the trap bits present in its 64-bit counterpart the MDCR_EL3 Put the register description in the right place so that it does not get enabled for ARMv7 and earlier, and give it a write function so that we can mask out the bits which should not be allowed to have an effect if EL3 is 32-bit. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1455892784-11328-2-git-send-email-peter.maydell@linaro.org Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Acked-by: Alistair Francis <alistair.francis@xilinx.com>
2016-02-26target-arm: Make Monitor->NS PL1 mode changes illegal if HCR.TGE is 1Peter Maydell
If HCR.TGE is 1 then mode changes via CPS and MSR from Monitor to NonSecure PL1 modes are illegal mode changes. Implement this check in bad_mode_switch(). (We don't currently implement HCR.TGE, but this is the only missing check from the v8 ARM ARM G1.9.3 and so it's worth adding now; the rest of the HCR.TGE checks can be added later as necessary.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-12-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: Make mode switches from Hyp via CPS and MRS illegalPeter Maydell
Mode switches from Hyp to any other mode via the CPS and MRS instructions are illegal mode switches (though obviously switching via exception return is valid). Add this check to bad_mode_switch(). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-11-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: In v8, make illegal AArch32 mode changes set PSTATE.ILPeter Maydell
In v8, the illegal mode changes which are UNPREDICTABLE in v7 are given architected behaviour: * the mode field is unchanged * PSTATE.IL is set (so any subsequent instructions will UNDEF) * any other CPSR fields are written to as normal This is pretty much the same behaviour we picked for our UNPREDICTABLE handling, with the exception that for v8 we need to set the IL bit. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-10-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: Forbid mode switch to Mon from Secure EL1Peter Maydell
In v8 trying to switch mode to Mon from Secure EL1 is an illegal mode switch. (In v7 this is impossible as all secure modes except User are at EL3.) We can handle this case by making a switch to Mon valid only if the current EL is 3, which then gives the correct answer whether EL3 is AArch32 or AArch64. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-9-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: Add Hyp mode checks to bad_mode_switch()Peter Maydell
We don't actually support Hyp mode yet, but add the correct checks for it to the bad_mode_switch() function for completeness. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-8-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: Add comment about not implementing NSACR.RFRPeter Maydell
QEMU doesn't implement the NSACR.RFR bit, which is a permitted IMPDEF in choice in ARMv7 and the only permitted choice in ARMv8. Add a comment to bad_mode_switch() to note that this is why FIQ is always a valid mode regardless of the CPU's Secure state. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-7-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: In cpsr_write() ignore mode switches from User modePeter Maydell
The only case where we can attempt a cpsr_write() mode switch from User is from the gdbstub; all other cases are handled in the calling code (notably translate.c). Architecturally attempts to alter the mode bits from user mode are simply ignored (and not treated as a bad mode switch, which in v8 sets CPSR.IL). Make mode switches from User ignored in cpsr_write() as well, for consistency. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-6-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: Raw CPSR writes should skip checks and bank switchingPeter Maydell
Raw CPSR writes should skip the architectural checks for whether we're allowed to set the A or F bits and should also not do the switching of register banks if the mode changes. Handle this inside cpsr_write(), which allows us to drop the "manually set the mode bits to avoid the bank switch" code from all the callsites which are using CPSRWriteRaw. This fixes a bug in 32-bit KVM handling where we had forgotten the "manually set the mode bits" part and could thus potentially trash the register state if the mode from the last exit to userspace differed from the mode on this exit. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-4-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: Add write_type argument to cpsr_write()Peter Maydell
Add an argument to cpsr_write() to indicate what kind of CPSR write is being requested, since the exact behaviour should differ for the different cases. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-3-git-send-email-peter.maydell@linaro.org
2016-02-26target-arm: Give CPSR setting on 32-bit exception return its own helperPeter Maydell
The rules for setting the CPSR on a 32-bit exception return are subtly different from those for setting the CPSR via an instruction like MSR or CPS. (In particular, in Hyp mode changing the mode bits is not valid via MSR or CPS.) Split the exception-return case into its own helper for setting CPSR, so we can eventually handle them differently in the helper function. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1455556977-3644-2-git-send-email-peter.maydell@linaro.org
2016-02-23all: Clean up includesPeter Maydell
Clean up includes so that osdep.h is included first and headers which it implies are not included manually. This commit was created with scripts/clean-includes. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Eric Blake <eblake@redhat.com>
2016-02-18target-arm: Add PMUSERENR_EL0 registerAlistair Francis
The Linux kernel accesses this register early in its setup. Signed-off-by: Christopher Covington <christopher.covington@linaro.org> Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: b30d536cb16ec57b4412172bb6dbc3f00d293e7d.1455060548.git.alistair.francis@xilinx.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-02-18target-arm: Add the pmovsclr_el0 and pmintenclr_el1 registersAlistair Francis
Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Tested-by: Nathan Rossi <nathan@nathanrossi.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 50deeafb24958a5b6d7f594b5dda399a022c0e5b.1455060548.git.alistair.francis@xilinx.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-02-18target-arm: Add the pmceid0 and pmceid1 registersAlistair Francis
Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> Signed-off-by: Alistair Francis <alistair.francis@xilinx.com> Tested-by: Nathan Rossi <nathan@nathanrossi.com> Message-id: da0563119a9f56fd5fbdc26e7ed19a8a8457c5b9.1455060548.git.alistair.francis@xilinx.com [PMM: Use 0 for PMCEID0 values for A15 and A57 since our PMU does not currently implement any events.] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-02-18target-arm: UNDEF in the UNPREDICTABLE SRS-from-System casePeter Maydell
Make get_r13_banked() raise an exception at runtime for the corner case of SRS from System mode, so that we can UNDEF it; this brings us in to line with the ARM ARM's set of permitted CONSTRAINED UNPREDICTABLE choices. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2016-02-18target-arm: Combine user-only and softmmu get/set_r13_banked()Peter Maydell
The user-mode versions of get/set_r13_banked() exist just to assert if they're ever called -- the translate time code should never emit calls to them because SRS from user mode always UNDEF. There's no code in the softmmu versions that can't compile in CONFIG_USER_ONLY, and the assertion is not particularly useful, so combine the two functions rather than having completely split versions under ifdefs. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com>
2016-02-18target-arm: Move bank_number() into internals.hPeter Maydell
Move bank_number()'s implementation into internals.h, so it's available in the user-mode-only compile as well. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com>
2016-02-18target-arm: Move get/set_r13_banked() to op_helper.cPeter Maydell
Move get/set_r13_banked() from helper.c to op_helper.c. This will let us add exception-raising code to them, and also puts them in the same file as get/set_user_reg(), which makes some conceptual sense. (The original reason for the helper.c/op_helper.c split was that only op_helper.c had access to the CPU env pointer; this distinction has not been true for a long time, though, and so the split is now rather arbitrary.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2016-02-18target-arm: Clean up trap/undef handling of SRSPeter Maydell
The SRS instruction is: * UNDEFINED in Hyp mode * UNPREDICTABLE in User or System mode * UNPREDICTABLE if the specified mode isn't accessible * trapped to EL3 if EL3 is AArch64 and we are at Secure EL1 Clean up the code to handle all these cases cleanly, including picking UNDEF as our choice of UNPREDICTABLE behaviour rather blindly trusting the mode field passed in the instruction. As part of this, move the check for IS_USER into gen_srs() itself rather than having it done by the caller. The exception is that we don't UNDEF for calls from System mode, which need a runtime check. This will be dealt with in the following commits. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2016-02-18target-arm: Report correct syndrome for FPEXC32_EL2 trapsPeter Maydell
If access to FPEXC32_EL2 is trapped by CPTR_EL2.TFP or CPTR_EL3.TFP, this should be reported with a syndrome register indicating an FP access trap, not one indicating a system register access trap. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com>
2016-02-18target-arm: Implement MDCR_EL3.TDA and MDCR_EL2.TDA trapsPeter Maydell
Implement the debug register traps controlled by MDCR_EL2.TDA and MDCR_EL3.TDA. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com>
2016-02-18target-arm: Implement MDCR_EL2.TDRA trapsPeter Maydell
Implement trapping of the "debug ROM" registers, which are controlled by MDCR_EL2.TDRA for EL2 but by the more general MDCR_EL3.TDA for EL3. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com>
2016-02-18target-arm: Implement MDCR_EL3.TDOSA and MDCR_EL2.TDOSA trapsPeter Maydell
Implement the traps to EL2 and EL3 controlled by the bits MDCR_EL2.TDOSA MDCR_EL3.TDOSA. These can configurably trap accesses to the "powerdown debug" registers. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com>
2016-02-18target-arm: Fix handling of SCR.SMDPeter Maydell
We weren't quite implementing the handling of SCR.SMD correctly. The condition governing whether the SMD bit should apply only for NS state is "is EL3 is AArch32", not "is the current EL AArch32". Fix the condition, and clarify the comment both to reflect this and to expand slightly on what's going on for the v7-no-Virtualization case. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2016-02-18target-arm: correct CNTFRQ access rightsPeter Maydell
Correct some corner cases we were getting wrong for CNTFRQ access rights: * should UNDEF from 32-bit Secure EL1 * only writable from the highest implemented exception level, which might not be EL1 now To clarify the code, provide a new utility function arm_highest_el() which returns the highest implemented exception level. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2016-02-11target-arm: Implement checking of fired watchpointSergey Fedorov
ARM stops before access to a location covered by watchpoint. Also, QEMU watchpoint fire is not necessarily an architectural watchpoint match. Unfortunately, that is hardly possible to ignore a fired watchpoint in debug exception handler. So move watchpoint check from debug exception handler to the dedicated watchpoint checking callback. Signed-off-by: Sergey Fedorov <serge.fdrv@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 1454256948-10485-3-git-send-email-serge.fdrv@gmail.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2016-02-11target-arm: Fix IL bit reported for Thumb VFP and Neon trapsPeter Maydell
All Thumb Neon and VFP instructions are 32 bits, so the IL bit in the syndrome register should be set. Pass false to the syn_* function's is_16bit argument rather than s->thumb so we report the correct IL bit. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1454683067-16001-4-git-send-email-peter.maydell@linaro.org
2016-02-11target-arm: Fix IL bit reported for Thumb coprocessor trapsPeter Maydell
All Thumb coprocessor instructions are 32 bits, so the IL bit in the syndrome register should be set. Pass false to the syn_* function's is_16bit argument rather than s->thumb so we report the correct IL bit. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1454683067-16001-3-git-send-email-peter.maydell@linaro.org
2016-02-11target-arm: Correct misleading 'is_thumb' syn_* parameter namesPeter Maydell
In syndrome register values, the IL bit indicates the instruction length, and is 1 for 4-byte instructions and 0 for 2-byte instructions. All A64 and A32 instructions are 4-byte, but Thumb instructions may be either 2 or 4 bytes long. Unfortunately we named the parameter to the syn_* functions for constructing syndromes "is_thumb", which falsely implies that it should be set for all Thumb instructions, rather than only the 16-bit ones. Fix the functions to name the parameter 'is_16bit' instead. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1454683067-16001-2-git-send-email-peter.maydell@linaro.org
2016-02-11target-arm: Enable EL3 for Cortex-A53 and Cortex-A57Peter Maydell
Enable EL3 support for our Cortex-A53 and Cortex-A57 CPU models. We have enough implemented now to be able to run real world code at least to some extent (I can boot ARM Trusted Firmware to the point where it pulls in OP-TEE and then falls over because it doesn't have a UEFI image it can chain to). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1454506721-11843-8-git-send-email-peter.maydell@linaro.org
2016-02-11target-arm: Implement NSACR trapping behaviourPeter Maydell
Implement some corner cases of the behaviour of the NSACR register on ARMv8: * if EL3 is AArch64 then accessing the NSACR from Secure EL1 with AArch32 should trap to EL3 * if EL3 is not present or is AArch64 then reads from NS EL1 and NS EL2 return constant 0xc00 It would in theory be possible to implement all these with a single reginfo definition, but for clarity we use three separate definitions for the three cases and install the right one based on the CPU feature flags. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Message-id: 1454506721-11843-7-git-send-email-peter.maydell@linaro.org
2016-02-11target-arm: Add isread parameter to CPAccessFnsPeter Maydell
System registers might have access requirements which need to be described via a CPAccessFn and which differ for reads and writes. For this to be possible we need to pass the access function a parameter to tell it whether the access being checked is a read or a write. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Sergey Fedorov <serge.fdrv@gmail.com> Message-id: 1454506721-11843-6-git-send-email-peter.maydell@linaro.org
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