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2019-01-21target/arm: Make PMCEID[01]_EL0 64 bit registers, add PMCEID[23]Aaron Lindsay
Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20181211151945.29137-9-aaron@os.amperecomputing.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Implement PMOVSSETAaron Lindsay
Add an array for PMOVSSET so we only define it for v7ve+ platforms Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181211151945.29137-7-aaron@os.amperecomputing.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Allow AArch32 access for PMCCFILTRAaron Lindsay
Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181211151945.29137-6-aaron@os.amperecomputing.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Filter cycle counter based on PMCCFILTR_EL0Aaron Lindsay
Rename arm_ccnt_enabled to pmu_counter_enabled, and add logic to only return 'true' if the specified counter is enabled and neither prohibited or filtered. Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> Signed-off-by: Aaron Lindsay <aclindsa@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181211151945.29137-5-aaron@os.amperecomputing.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Swap PMU values before/after migrationsAaron Lindsay
Because of the PMU's design, many register accesses have side effects which are inter-related, meaning that the normal method of saving CP registers can result in inconsistent state. These side-effects are largely handled in pmu_op_start/finish functions which can be called before and after the state is saved/restored. By doing this and adding raw read/write functions for the affected registers, we avoid migration-related inconsistencies. Signed-off-by: Aaron Lindsay <aclindsa@gmail.com> Signed-off-by: Aaron Lindsay <aaron@os.amperecomputing.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20181211151945.29137-4-aaron@os.amperecomputing.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Reorganize PMCCNTR accessesAaron Lindsay
pmccntr_read and pmccntr_write contained duplicate code that was already being handled by pmccntr_sync. Consolidate the duplicated code into two functions: pmccntr_op_start and pmccntr_op_finish. Add a companion to c15_ccnt in CPUARMState so that we can simultaneously save both the architectural register value and the last underlying cycle count - this ensures time isn't lost and will also allow us to access the 'old' architectural register value in order to detect overflows in later patches. Signed-off-by: Aaron Lindsay <alindsay@codeaurora.org> Signed-off-by: Aaron Lindsay <aclindsa@gmail.com> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20181211151945.29137-3-aaron@os.amperecomputing.com Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Add PAuth system registersRichard Henderson
Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190108223129.5570-29-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Reuse aa64_va_parameters for setting tbflagsRichard Henderson
The arm_regime_tbi{0,1} functions are replacable with the new function by giving the lowest and highest address. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190108223129.5570-24-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Decode TBID from TCRRichard Henderson
Use TBID in aa64_va_parameters depending on the data parameter. This automatically updates all existing users of the function. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20190108223129.5570-23-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Add aa64_va_parameters_bothRichard Henderson
We will want to check TBI for I and D simultaneously. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20190108223129.5570-22-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Export aa64_va_parameters to internals.hRichard Henderson
We need to reuse this from helper-a64.c. Provide a stub definition for CONFIG_USER_ONLY. This matches the stub definitions that we removed for arm_regime_tbi{0,1} before. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190108223129.5570-21-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Merge TBFLAG_AA_TB{0, 1} to TBIIRichard Henderson
We will shortly want to talk about TBI as it relates to data. Passing around a pair of variables is less convenient than a single variable. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20190108223129.5570-20-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Create ARMVAParameters and helpersRichard Henderson
Split out functions to extract the virtual address parameters. Let the functions choose T0 or T1 address space half, if present. Extract (most of) the control bits that vary between EL or Tx. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20190108223129.5570-19-richard.henderson@linaro.org [PMM: fixed minor checkpatch comment nits] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Introduce arm_stage1_mmu_idxRichard Henderson
While we could expose stage_1_mmu_idx, the combination is probably going to be more useful. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190108223129.5570-18-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Introduce arm_mmu_idxRichard Henderson
The pattern ARMMMUIdx mmu_idx = core_to_arm_mmu_idx(env, cpu_mmu_index(env, false)); is computing the full ARMMMUIdx, stripping off the ARM bits, and then putting them back. Avoid the extra two steps with the appropriate helper function. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190108223129.5570-17-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Move cpu_mmu_index out of lineRichard Henderson
This function is, or will shortly become, too big to inline. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190108223129.5570-16-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Add PAuth active bit to tbflagsRichard Henderson
There are 5 bits of state that could be added, but to save space within tbflags, add only a single enable bit. Helpers will determine the rest of the state at runtime. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20190108223129.5570-4-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-21target/arm: Allow Aarch32 exception return to switch from Mon->HypAlexander Graf
In U-boot, we switch from S-SVC -> Mon -> Hyp mode when we want to enter Hyp mode. The change into Hyp mode is done by doing an exception return from Mon. This doesn't work with current QEMU. The problem is that in bad_mode_switch() we refuse to allow the change of mode. Note that bad_mode_switch() is used to do validation for two situations: (1) changes to mode by instructions writing to CPSR.M (ie not exception take/return) -- this corresponds to the Armv8 Arm ARM pseudocode Arch32.WriteModeByInstr (2) changes to mode by exception return Attempting to enter or leave Hyp mode via case (1) is forbidden in v8 and UNPREDICTABLE in v7, and QEMU is correct to disallow it there. However, we're already doing that check at the top of the bad_mode_switch() function, so if that passes then we should allow the case (2) exception return mode changes to switch into Hyp mode. We want to test whether we're trying to return to the nonexistent "secure Hyp" mode, so we need to look at arm_is_secure_below_el3() rather than arm_is_secure(), since the latter is always true if we're in Mon (EL3). Signed-off-by: Alexander Graf <agraf@suse.de> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20190109152430.32359-1-agraf@suse.de [PMM: rewrote commit message] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2019-01-07target/arm: Convert ARM_TBFLAG_* to FIELDsRichard Henderson
Use "register" TBFLAG_ANY to indicate shared state between A32 and A64, and "registers" TBFLAG_A32 & TBFLAG_A64 for fields that are specific to the given cpu state. Move ARM_TBFLAG_BE_DATA to shared state, instead of its current placement within "Bit usage when in AArch32 state". Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20181218164348.7127-1-richard.henderson@linaro.org [PMM: removed the renaming of BE_DATA flag to BE] Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-13target/arm: Implement the ARMv8.1-LOR extensionRichard Henderson
Provide a trivial implementation with zero limited ordering regions, which causes the LDLAR and STLLR instructions to devolve into the LDAR and STLR instructions from the base ARMv8.0 instruction set. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181210150501.7990-4-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-13target/arm: Use arm_hcr_el2_eff more placesRichard Henderson
Since arm_hcr_el2_eff includes a check against arm_is_secure_below_el3, we can often remove a nearby check against secure state. In some cases, sort the call to arm_hcr_el2_eff to the end of a short-circuit logical sequence. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181210150501.7990-3-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-13target/arm: Introduce arm_hcr_el2_effRichard Henderson
Replace arm_hcr_el2_{fmo,imo,amo} with a more general routine that also takes SCR_EL3.NS (aka arm_is_secure_below_el3) into account, as documented for the plethora of bits in HCR_EL2. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181210150501.7990-2-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-13target/arm: Implement the ARMv8.2-AA32HPD extensionRichard Henderson
The bulk of the work here, beyond base HPD, is defining the TTBCR2 register. In addition we must check TTBCR.T2E, which is not present (RES0) for AArch64. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181203203839.757-11-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-13target/arm: Implement the ARMv8.1-HPD extensionRichard Henderson
Since the TCR_*.HPD bits were RES0 in ARMv8.0, we can simply interpret the bits as if ARMv8.1-HPD is present without checking. We will need a slightly different check for hpd for aarch32. Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181203203839.757-10-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-13target/arm: Tidy scr_writeRichard Henderson
Because EL3 has a fixed execution mode, we can properly decide which of the bits are RES{0,1}. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181203203839.757-8-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-13target/arm: Fix HCR_EL2.TGE check in arm_phys_excp_target_elRichard Henderson
The enable for TGE has already occurred within arm_hcr_el2_amo and friends. Moreover, when E2H is also set, the sense is supposed to be reversed, which has also already occurred within the helpers. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181203203839.757-5-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-12-13target/arm: Move id_aa64mmfr* to ARMISARegistersPeter Maydell
At the same time, define the fields for these registers, and use those defines in arm_pamax(). Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181203203839.757-2-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> [PMM: fixed up typo (s/achf/ahcf/) belatedly spotted by RTH] Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-11-13target/arm: Hyp mode R14 is shared with User and SystemPeter Maydell
Hyp mode is an exception to the general rule that each AArch32 mode has its own r13, r14 and SPSR -- it has a banked r13 and SPSR but shares its r14 with User and System mode. We were incorrectly implementing it as banked, which meant that on entry to Hyp mode r14 was 0 rather than the USR/SYS r14. We provide a new function r14_bank_number() which is like the existing bank_number() but provides the index into env->banked_r14[]; bank_number() provides the index to use for env->banked_r13[] and env->banked_cpsr[]. All the points in the code that were using bank_number() to index into env->banked_r14[] are updated for consintency: * switch_mode() -- this is the only place where we fix an actual bug * aarch64_sync_32_to_64() and aarch64_sync_64_to_32(): no behavioural change as we already special-cased Hyp R14 * kvm32.c: no behavioural change since the guest can't ever be in Hyp mode, but conceptually the right thing to do * msr_banked()/mrs_banked(): we can never get to the case that accesses banked_r14[] with tgtmode == ARM_CPU_MODE_HYP, so no behavioural change Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20181109173553.22341-2-peter.maydell@linaro.org
2018-11-13target/arm: Correctly implement handling of HCR_EL2.{VI, VF}Peter Maydell
In commit 8a0fc3a29fc2315325400 we tried to implement HCR_EL2.{VI,VF}, but we got it wrong and had to revert it. In that commit we implemented them as simply tracking whether there is a pending virtual IRQ or virtual FIQ. This is not correct -- these bits cause a software-generated VIRQ/VFIQ, which is distinct from whether there is a hardware-generated VIRQ/VFIQ caused by the external interrupt controller. So we need to track separately the HCR_EL2 bit state and the external virq/vfiq line state, and OR the two together to get the actual pending VIRQ/VFIQ state. Fixes: 8a0fc3a29fc2315325400c738f807d0d4ae0ab7f Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Message-id: 20181109134731.11605-4-peter.maydell@linaro.org
2018-11-13Revert "target/arm: Implement HCR.VI and VF"Peter Maydell
This reverts commit 8a0fc3a29fc2315325400c738f807d0d4ae0ab7f. The implementation of HCR.VI and VF in that commit is not correct -- they do not track the overall "is there a pending VIRQ or VFIQ" status, but whether there is a pending interrupt due to "this mechanism", ie the hypervisor having set the VI/VF bits. The overall pending state for VIRQ and VFIQ is effectively the logical OR of the inbound lines from the GIC with the VI and VF bits. Commit 8a0fc3a29fc231 would result in pending VIRQ/VFIQ possibly being lost when the hypervisor wrote to HCR. As a preliminary to implementing the HCR.VI/VF feature properly, revert the broken one entirely. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20181109134731.11605-2-peter.maydell@linaro.org
2018-11-13target/arm: Fix typo in tlbi_aa64_vmalle1_writeRichard Henderson
This would cause an infinite recursion or loop. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20181110121711.15257-1-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-11-13target/arm: Remove antique TODO commentPeter Maydell
Remove a TODO comment about implementing the vectored interrupt controller. We have had an implementation of that for a decade; it's in hw/intc/pl190.c. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181106164118.16184-1-peter.maydell@linaro.org Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
2018-11-13target/arm: Remove workaround for small SAU regionsPeter Maydell
Before we supported direct execution from MMIO regions, we implemented workarounds in commit 720424359917887c926a33d2 which let us avoid doing so, even if the SAU or MPU region was less than page-sized. Once we implemented execute-from-MMIO, we removed part of those workarounds in commit d4b6275df320cee76; but we forgot the one in get_phys_addr_pmsav8() which suppressed use of small SAU regions in executable regions. Remove that workaround now. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181106163801.14474-1-peter.maydell@linaro.org
2018-11-06target/arm: Fix ATS1Hx instructionsPeter Maydell
ATS1HR and ATS1HW (which allow AArch32 EL2 to do address translations on the EL2 translation regime) were implemented in commit 14db7fe09a2c8. However, we got them wrong: these should do stage 1 address translations as defined for NS-EL2, which is ARMMMUIdx_S1E2. We were incorrectly making them perform stage 2 translations. A few years later in commit 1313e2d7e2cd we forgot entirely that we'd implemented ATS1Hx, and added a comment that ATS1Hx were "not supported yet". Remove the comment; there is no extra code needed to handle these operations in do_ats_write(), because arm_s1_regime_using_lpae_format() returns true for ARMMMUIdx_S1E2, which forces 64-bit PAR format. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20181016093703.10637-3-peter.maydell@linaro.org Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
2018-11-06target/arm: Set S and PTW in 64-bit PAR formatPeter Maydell
In do_ats_write() we construct a PAR value based on the result of the translation. A comment says "S2WLK and FSTAGE are always zero, because we don't implement virtualization". Since we do in fact now implement virtualization, add the missing code that sets these bits based on the reported ARMMMUFaultInfo. (These bits are named PTW and S in ARMv8, so we follow that convention in the new comments in this patch.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20181016093703.10637-2-peter.maydell@linaro.org
2018-10-24target/arm: Only flush tlb if ASID changesRichard Henderson
Since QEMU does not implement ASIDs, changes to the ASID must flush the tlb. However, if the ASID does not change there is no reason to flush. In testing a boot of the Ubuntu installer to the first menu, this reduces the number of flushes by 30%, or nearly 600k instances. Reviewed-by: Aaron Lindsay <aaron@os.amperecomputing.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Message-id: 20181019015617.22583-3-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-24target/arm: Remove writefn from TTBR0_EL3Richard Henderson
The EL3 version of this register does not include an ASID, and so the tlb_flush performed by vmsa_ttbr_write is not needed. Reviewed-by: Aaron Lindsay <aaron@os.amperecomputing.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20181019015617.22583-2-richard.henderson@linaro.org Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-24target/arm: Report correct syndrome for FP/SIMD traps to Hyp modePeter Maydell
For traps of FP/SIMD instructions to AArch32 Hyp mode, the syndrome provided in HSR has more information than is reported to AArch64. Specifically, there are extra fields TA and coproc which indicate whether the trapped instruction was FP or SIMD. Add this extra information to the syndromes we construct, and mask it out when taking the exception to AArch64. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-11-peter.maydell@linaro.org
2018-10-24target/arm: Get IL bit correct for v7 syndrome valuesPeter Maydell
For the v7 version of the Arm architecture, the IL bit in syndrome register values where the field is not valid was defined to be UNK/SBZP. In v8 this is RES1, which is what QEMU currently implements. Handle the desired v7 behaviour by squashing the IL bit for the affected cases: * EC == EC_UNCATEGORIZED * prefetch aborts * data aborts where ISV is 0 (The fourth case listed in the v8 Arm ARM DDI 0487C.a in section G7.2.70, "illegal state exception", can't happen on a v7 CPU.) This deals with a corner case noted in a comment. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-10-peter.maydell@linaro.org
2018-10-24target/arm: New utility function to extract EC from syndromePeter Maydell
Create and use a utility function to extract the EC field from a syndrome, rather than open-coding the shift. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-9-peter.maydell@linaro.org
2018-10-24target/arm: Implement HCR.PTWPeter Maydell
If the HCR_EL2 PTW virtualizaiton configuration register bit is set, then this means that a stage 2 Permission fault must be generated if a stage 1 translation table access is made to an address that is mapped as Device memory in stage 2. Implement this. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-8-peter.maydell@linaro.org
2018-10-24target/arm: Implement HCR.VI and VFPeter Maydell
The HCR_EL2 VI and VF bits are supposed to track whether there is a pending virtual IRQ or virtual FIQ. For QEMU we store the pending VIRQ/VFIQ status in cs->interrupt_request, so this means: * if the register is read we must get these bit values from cs->interrupt_request * if the register is written then we must write the bit values back into cs->interrupt_request Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-7-peter.maydell@linaro.org
2018-10-24target/arm: ISR_EL1 bits track virtual interrupts if IMO/FMO setPeter Maydell
The A/I/F bits in ISR_EL1 should track the virtual interrupt status, not the physical interrupt status, if the associated HCR_EL2.AMO/IMO/FMO bit is set. Implement this, rather than always showing the physical interrupt status. We don't currently implement anything to do with external aborts, so this applies only to the I and F bits (though it ought to be possible for the outer guest to present a virtual external abort to the inner guest, even if QEMU doesn't emulate physical external aborts, so there is missing functionality in this area). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-6-peter.maydell@linaro.org
2018-10-24target/arm: Implement HCR.DCPeter Maydell
The HCR.DC virtualization configuration register bit has the following effects: * SCTLR.M behaves as if it is 0 for all purposes except direct reads of the bit * HCR.VM behaves as if it is 1 for all purposes except direct reads of the bit * the memory type produced by the first stage of the EL1&EL0 translation regime is Normal Non-Shareable, Inner Write-Back Read-Allocate Write-Allocate, Outer Write-Back Read-Allocate Write-Allocate. Implement this behaviour. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-5-peter.maydell@linaro.org
2018-10-24target/arm: Implement HCR.FBPeter Maydell
The HCR.FB virtualization configuration register bit requests that TLB maintenance, branch predictor invalidate-all and icache invalidate-all operations performed in NS EL1 should be upgraded from "local CPU only to "broadcast within Inner Shareable domain". For QEMU we NOP the branch predictor and icache operations, so we only need to upgrade the TLB invalidates: AArch32 TLBIALL, TLBIMVA, TLBIASID, DTLBIALL, DTLBIMVA, DTLBIASID, ITLBIALL, ITLBIMVA, ITLBIASID, TLBIMVAA, TLBIMVAL, TLBIMVAAL AArch64 TLBI VMALLE1, TLBI VAE1, TLBI ASIDE1, TLBI VAAE1, TLBI VALE1, TLBI VAALE1 Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-4-peter.maydell@linaro.org
2018-10-24target/arm: Make switch_mode() file-localPeter Maydell
The switch_mode() function is defined in target/arm/helper.c and used only in that file and nowhere else, so we can make it file-local rather than global. Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-3-peter.maydell@linaro.org
2018-10-24target/arm: Improve debug logging of AArch32 exception returnPeter Maydell
For AArch32, exception return happens through certain kinds of CPSR write. We don't currently have any CPU_LOG_INT logging of these events (unlike AArch64, where we log in the ERET instruction). Add some suitable logging. This will log exception returns like this: Exception return from AArch32 hyp to usr PC 0x80100374 paralleling the existing logging in the exception_return helper for AArch64 exception returns: Exception return from AArch64 EL2 to AArch64 EL0 PC 0x8003045c Exception return from AArch64 EL2 to AArch32 EL0 PC 0x8003045c (Note that an AArch32 exception return can only be AArch32->AArch32, never to AArch64.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181012144235.19646-2-peter.maydell@linaro.org
2018-10-24target/arm: Convert v8.2-fp16 from feature bit to aa64pfr0 testRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181016223115.24100-9-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-24target/arm: Convert sve from feature bit to aa64pfr0 testRichard Henderson
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181016223115.24100-8-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-24target/arm: Move some system registers into a substructureRichard Henderson
Create struct ARMISARegisters, to be accessed during translation. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20181016223115.24100-2-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
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