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2018-11-02target/arm: Conditionalize some asserts on aarch32 supportRichard Henderson2-2/+18
When populating id registers from kvm, on a host that doesn't support aarch32 mode at all, neither arm_div nor jazelle will be supported either. Signed-off-by: Richard Henderson <richard.henderson@linaro.org> Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Tested-by: Alex Bennée <alex.bennee@linaro.org> Message-id: 20181102102025.3546-1-richard.henderson@linaro.org Reviewed-by: Peter Maydell <peter.maydell@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-11-02Merge remote-tracking branch 'remotes/riscv/tags/riscv-for-master-3.1-sf1' ↵Peter Maydell1-1/+1
into staging RISC-V Patches for the 3.1 Soft Freeze, Part 2 This tag contains a few simple patches that I'd like to target for the QEMU soft freeze. There's only one code change: a fix to our PMP implementation that avoids an internal truncation while computing a partial PMP read. I also have two updates to the MAINTAINERS file: one to add Alistair as a RISC-V maintainer, and one to add our newly created mailing list. # gpg: Signature made Tue 30 Oct 2018 18:17:17 GMT # gpg: using RSA key EF4CA1502CCBAB41 # gpg: Good signature from "Palmer Dabbelt <palmer@dabbelt.com>" # gpg: aka "Palmer Dabbelt <palmer@sifive.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 00CE 76D1 8349 60DF CE88 6DF8 EF4C A150 2CCB AB41 * remotes/riscv/tags/riscv-for-master-3.1-sf1: Add qemu-riscv@nongnu.org as the RISC-V list Add Alistair as a RISC-V Maintainer target/riscv/pmp.c: pmpcfg_csr_read returns bogus value on RV64 Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-11-02Merge remote-tracking branch 'remotes/vivier/tags/m68k-for-3.1-pull-request' ↵Peter Maydell2-4/+3
into staging Fix illegal instruction exception number # gpg: Signature made Thu 01 Nov 2018 11:34:49 GMT # gpg: using RSA key F30C38BD3F2FBE3C # gpg: Good signature from "Laurent Vivier <lvivier@redhat.com>" # gpg: aka "Laurent Vivier <laurent@vivier.eu>" # gpg: aka "Laurent Vivier (Red Hat) <lvivier@redhat.com>" # Primary key fingerprint: CD2F 75DD C8E3 A4DC 2E4F 5173 F30C 38BD 3F2F BE3C * remotes/vivier/tags/m68k-for-3.1-pull-request: target/m68k: use EXCP_ILLEGAL instead of EXCP_UNSUPPORTED Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-11-01Merge remote-tracking branch 'remotes/rth/tags/pull-dt-20181031' into stagingPeter Maydell3-375/+355
Updates to decodetree.py for risc-v. # gpg: Signature made Wed 31 Oct 2018 16:52:07 GMT # gpg: using RSA key 64DF38E8AF7E215F # gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>" # Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A 05C0 64DF 38E8 AF7E 215F * remotes/rth/tags/pull-dt-20181031: decodetree: Allow multiple input files decodetree: Remove "insn" argument from trans_* expanders decodetree: Add !extern flag to argument sets Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-11-01target/m68k: use EXCP_ILLEGAL instead of EXCP_UNSUPPORTEDLaurent Vivier2-4/+3
Coldfire defines an "Unsupported instruction" exception if execution of a valid instruction is attempted but the required hardware is not present in the processor. We use it with instructions that are in fact undefined or illegal, and the exception expected in this case by the kernel is the illegal exception, so this patch fixes that. Signed-off-by: Laurent Vivier <laurent@vivier.eu> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-Id: <20181030165554.5761-1-laurent@vivier.eu>
2018-10-31decodetree: Remove "insn" argument from trans_* expandersRichard Henderson3-375/+355
This allows trans_* expanders to be shared between decoders for 32 and 16-bit insns, by not tying the expander to the size of the insn that produced it. This change requires adjusting the two existing users to match. Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com> Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-10-30i386: Add PKU on Skylake-Server CPU modelTao Xu1-0/+4
As the release document ref below link (page 13): https://software.intel.com/sites/default/files/managed/c5/15/\ architecture-instruction-set-extensions-programming-reference.pdf PKU is supported in Skylake Server (Only Server) and later, and on Intel(R) Xeon(R) Processor Scalable Family. So PKU is supposed to be in Skylake-Server CPU model. And PKU's CPUID has been exposed to QEMU. But PKU can't be find in Skylake-Server CPU model in the code. So this patch will fix this issue in Skylake-Server CPU model. Signed-off-by: Tao Xu <tao3.xu@intel.com> Message-Id: <5014b57f834dcfa8fd3781504d98dcf063d54fde.1540801392.git.tao3.xu@intel.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-10-30i386: Add new model of Cascadelake-ServerTao Xu1-0/+54
New CPU models mostly inherit features from ancestor Skylake-Server, while addin new features: AVX512_VNNI, Intel PT. SSBD support for speculative execution side channel mitigations. Note: On Cascadelake, some capabilities (RDCL_NO, IBRS_ALL, RSBA, SKIP_L1DFL_VMENTRY and SSB_NO) are enumerated by MSR. These features rely on MSR based feature support patch. Will be added later after that patch's in. http://lists.nongnu.org/archive/html/qemu-devel/2018-09/msg00074.html Signed-off-by: Tao Xu <tao3.xu@intel.com> Message-Id: <20180919031122.28487-2-tao3.xu@intel.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-10-30x86: define a new MSR based feature word -- FEATURE_WORDS_ARCH_CAPABILITIESRobert Hoo3-1/+42
Note RSBA is specially treated -- no matter host support it or not, qemu pretends it is supported. Signed-off-by: Robert Hoo <robert.hu@linux.intel.com> Message-Id: <1539578845-37944-4-git-send-email-robert.hu@linux.intel.com> [ehabkost: removed automatic enabling of RSBA] Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-10-30x86: Data structure changes to support MSR based featuresRobert Hoo1-55/+142
Add FeatureWordType indicator in struct FeatureWordInfo. Change feature_word_info[] accordingly. Change existing functions that refer to feature_word_info[] accordingly. Signed-off-by: Robert Hoo <robert.hu@linux.intel.com> Message-Id: <1539578845-37944-3-git-send-email-robert.hu@linux.intel.com> [ehabkost: fixed hvf_enabled() case] Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-10-30kvm: Add support to KVM_GET_MSR_FEATURE_INDEX_LIST and KVM_GET_MSRS system ioctlRobert Hoo1-0/+80
Add kvm_get_supported_feature_msrs() to get supported MSR feature index list. Add kvm_arch_get_supported_msr_feature() to get each MSR features value. Signed-off-by: Robert Hoo <robert.hu@linux.intel.com> Message-Id: <1539578845-37944-2-git-send-email-robert.hu@linux.intel.com> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-10-30target/i386: Remove #ifdeffed-out icebp debugging hackPeter Maydell1-6/+0
Remove a debugging hack which could be used to cause the undocumented 'icebp' instruction to enable QEMU internal debug logging. This code has always been #ifdeffed out since it was introduced in commit aba9d61e34b9 in 2005; judging by the rest of that commit (which is entirely unrelated) it may have even been committed by accident. (Note that WANT_ICEBP is not defined by default anyway.) Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-Id: <20181009183314.13416-1-peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-10-30i386: correct cpu_x86_cpuid(0xd)Sebastian Andrzej Siewior1-1/+1
Intel SDM says for CPUID function 0DH, sub-function 0: | • ECX enumerates the size (in bytes) required by the XSAVE instruction for an | XSAVE area containing all the user state components supported by this | processor. | • EBX enumerates the size (in bytes) required by the XSAVE instruction for an | XSAVE area containing all the user state components corresponding to bits | currently set in XCR0. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Message-Id: <20180928104319.3296-1-bigeasy@linutronix.de> Reviewed-by: Eduardo Habkost <ehabkost@redhat.com> Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-10-30target/riscv/pmp.c: pmpcfg_csr_read returns bogus value on RV64Dayeol Lee1-1/+1
pmp_read_cfg() returns 8-bit value, which is combined together to form a single pmpcfg CSR. The default promotion rules will result in an integer here ("i*8" is integer, which flows through) resulting in a 32-bit signed value on most hosts. That's bogus on RV64I, with the high bits of the CSR being wrong. Signed-off-by: Dayeol Lee <dayeol@berkeley.edu> Reviewed-by: Palmer Dabbelt <palmer@sifive.com> Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
2018-10-29target/mips: Amend MXU ASE overview noteAleksandar Markovic1-10/+74
Add prefix, suffix, operation descriptions, and other corrections and amendments to the comment that describes MXU ASE. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Move MXU_EN check one level higherAleksandar Markovic1-271/+238
Move MXU_EN check to the main MXU decoding function, to avoid code repetition. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add emulation of MXU instructions S32LDD and S32LDDRCraig Janeczek1-7/+47
Add support for emulating the S32LDD and S32LDDR MXU instructions. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add emulation of MXU instructions Q8MUL and Q8MULSUCraig Janeczek1-7/+94
Adds support for emulating the Q8MUL and Q8MULSU MXU instructions. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add emulation of MXU instruction D16MACCraig Janeczek1-3/+87
Add support for emulating the D16MAC MXU instruction. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add emulation of MXU instruction D16MULCraig Janeczek1-3/+63
Add support for emulating the D16MUL MXU instruction. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add emulation of MXU instruction S8LDDCraig Janeczek1-3/+87
Add support for emulating the S8LDD MXU instruction. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Move MUL, S32M2I, S32I2M handling out of main MXU switchAleksandar Markovic1-18/+23
Move MUL, S32M2I, S32I2M handling out of switch. These are all instructions that do not depend on MXU_EN flag of MXU_CR. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add emulation of MXU instructions S32I2M and S32M2ICraig Janeczek1-6/+85
Add support for emulating the S32I2M and S32M2I MXU instructions. This commit also contains utility functions for reading/writing to MXU registers. This is required for overall MXU instruction support. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add emulation of non-MXU MULL within MXU decoding engineCraig Janeczek1-1/+18
Add emulation of non-MXU MULL within MXU decoding engine. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add bit encoding for MXU operand getting pattern 'optn3'Craig Janeczek1-0/+10
Add bit encoding for MXU operand getting pattern 'optn3'. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add bit encoding for MXU operand getting pattern 'optn2'Craig Janeczek1-0/+6
Add bit encoding for MXU operand getting pattern 'optn2'. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add bit encoding for MXU execute add/sub pattern 'eptn2'Aleksandar Markovic1-0/+6
Add bit encoding for MXU execute 2-bit add/subtract pattern 'eptn2'. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add bit encoding for MXU accumulate add/sub 2-bit pattern 'aptn2'Craig Janeczek1-0/+6
Add bit encoding for MXU accumulate add/subtract 2-bit pattern 'aptn2'. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add bit encoding for MXU accumulate add/sub 1-bit pattern 'aptn1'Aleksandar Markovic1-0/+6
Add bit encoding for MXU accumulate add/subtract 1-bit pattern 'aptn1'. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add MXU decoding engineAleksandar Markovic1-2/+1141
Add MXU decoding engine: add handlers for all instruction pools, and main decode handler. The handlers, for now, for the purpose of this patch, contain only sceleton in the form of a single switch statement. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add and integrate MXU decoding engine placeholderAleksandar Markovic1-0/+8
Provide the placeholder and add the invocation logic for MXU decoding engine. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Amend MXU instruction opcodesAleksandar Markovic1-91/+69
Amend MXU instruction opcodes. Pool04 is actually only instruction OPC_MXU_S16MAD. Two cases within S16MAD are recognized by 1-bit subfield 'aptn1'. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Define a bit for MXU in insn_flagsCraig Janeczek1-0/+1
Define a bit for MXU in insn_flags. This is the first non-MIPS (third party) ASE supported in QEMU for MIPS, so it is placed in the section "bits 56-63: vendor-specific ASEs". Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Introduce MXU registersCraig Janeczek2-0/+30
Define and initialize the 16 MXU registers - 15 general computational register, and 1 control register). There is also a zero register, but it does not have any corresponding variable. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Craig Janeczek <jancraig@amazon.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-29target/mips: Add two missing breaks for NM_LLWPE and NM_SCWPE decoder casesAleksandar Markovic1-0/+2
Coverity found two fallthroughs that miss break statement. Fix them. Revieved-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-25target/mips: Add disassembler support for nanoMIPSAleksandar Markovic1-2/+11
Add disassembler support for nanoMIPS. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Matthew Fortune <matthew.fortune@mips.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-25target/mips: Implement emulation of nanoMIPS EVA instructionsDimitrije Nikolic1-0/+128
Implement emulation of nanoMIPS EVA instructions. They are all part of P.LS.E0 instruction pool, or one of its subpools. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Dimitrije Nikolic <dnikolic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-25target/mips: Add nanoMIPS CRC32 instruction poolAleksandar Markovic1-0/+10
Add nanoMIPS CRC32 instruction pool. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-25Merge remote-tracking branch 'remotes/riscv/tags/riscv-for-master-3.1-sf0' ↵Peter Maydell6-362/+420
into staging First RISC-V Patch Set for the 3.1 Soft Freeze This pull request contains a handful of patches that have been floating around various trees for a while but haven't made it upstream. These patches all appear quite safe. They're all somewhat independent from each other: * One refactors our IRQ management function to allow multiple interrupts to be raised an once. This patch has no functional difference. * Cleaning up the op_helper/cpu_helper split. This patch has no functional difference. * Updates to various constants to keep them in sync with the latest ISA specification and to remove some non-standard bits that snuck in. * A fix for a memory leak in the PLIC driver. * A fix to our device tree handling to avoid provinging a NULL string. I've given this my standard test: building the port, booting a Fedora root filesytem on the latest Linux tag, and then shutting down that image. Essentially I'm just following the QEMU RISC-V wiki page's instructions. Everything looks fine here. We have a lot more outstanding patches so I'll definately be submitting another PR for the soft freeze. # gpg: Signature made Wed 17 Oct 2018 21:17:52 BST # gpg: using RSA key EF4CA1502CCBAB41 # gpg: Good signature from "Palmer Dabbelt <palmer@dabbelt.com>" # gpg: aka "Palmer Dabbelt <palmer@sifive.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 00CE 76D1 8349 60DF CE88 6DF8 EF4C A150 2CCB AB41 * remotes/riscv/tags/riscv-for-master-3.1-sf0: RISC-V: Don't add NULL bootargs to device-tree RISC-V: Add missing free for plic_hart_config RISC-V: Update CSR and interrupt definitions RISC-V: Move non-ops from op_helper to cpu_helper RISC-V: Allow setting and clearing multiple irqs Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-24Merge remote-tracking branch ↵Peter Maydell3-19/+908
'remotes/amarkovic/tags/mips-queue-oct-2018-part-2-v2' into staging MIPS queue for October 2018 - part 2 - v2 # gpg: Signature made Wed 24 Oct 2018 14:22:54 BST # gpg: using RSA key D4972A8967F75A65 # gpg: Good signature from "Aleksandar Markovic <amarkovic@wavecomp.com>" # gpg: WARNING: This key is not certified with a trusted signature! # gpg: There is no indication that the signature belongs to the owner. # Primary key fingerprint: 8526 FBF1 5DA3 811F 4A01 DD75 D497 2A89 67F7 5A65 * remotes/amarkovic/tags/mips-queue-oct-2018-part-2-v2: (33 commits) target/mips: Fix decoding of ALIGN and DALIGN instructions target/mips: Fix the title of translate.c linux-user/mips: Recognize the R5900 CPU model target/mips: Define the R5900 CPU tests/tcg/mips: Add tests for R5900 DIVU1 tests/tcg/mips: Add tests for R5900 DIV1 tests/tcg/mips: Add tests for R5900 MTLO1 and MTHI1 tests/tcg/mips: Add tests for R5900 MFLO1 and MFHI1 tests/tcg/mips: Add tests for R5900 three-operand MULTU1 tests/tcg/mips: Add tests for R5900 three-operand MULT1 tests/tcg/mips: Add tests for R5900 three-operand MULTU tests/tcg/mips: Add tests for R5900 three-operand MULT target/mips: Make R5900 DMULT[U], DDIV[U], LL[D] and SC[D] user only target/mips: Support R5900 MOVN, MOVZ and PREF instructions from MIPS IV target/mips: Support R5900 DIV1 and DIVU1 instructions target/mips: Support R5900 MFLO1, MTLO1, MFHI1 and MTHI1 instructions target/mips: Support R5900 three-operand MULT1 and MULTU1 instructions target/mips: Support R5900 three-operand MULT and MULTU instructions target/mips: Add a placeholder for R5900 MMI3 instruction subclass target/mips: Add a placeholder for R5900 MMI2 instruction subclass ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-10-24target/mips: Fix decoding of ALIGN and DALIGN instructionsAleksandar Markovic1-8/+32
Opcode for ALIGN and DALIGN must be in fact ranges of opcodes, to allow paremeter 'bp' to occupy two and three bits, respectively. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Fix the title of translate.cAleksandar Markovic1-1/+1
Replace MIPS32 with MIPS, since the file covers all generations of MIPS architectures. Reviewed-by: Stefan Markovic <smarkovic@wavecomp.com> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Define the R5900 CPUFredrik Noring1-0/+59
The primary purpose of this change is to support programs compiled by GCC for the R5900 target and thereby run R5900 Linux distributions, for example Gentoo. GCC in version 7.3, by itself, by inspection of the GCC source code and inspection of the generated machine code, for the R5900 target, only emits two instructions that are specific to the R5900: the three- operand MULT and MULTU. GCC and libc also emit certain MIPS III instructions that are not part of the R5900 ISA. They are normally trapped and emulated by the Linux kernel, and therefore need to be treated accordingly by QEMU. A program compiled by GCC is taken to mean source code compiled by GCC under the restrictions above. One can, with the apparent limitations, with a bit of effort obtain a fully functioning operating system such as R5900 Gentoo. Strictly speaking, programs need not be compiled by GCC to make use of this change. Instructions and other facilities of the R5900 not implemented by this change are intended to signal provisional exceptions. One such example is the FPU that is not compliant with IEEE 754-1985 in system mode. It is therefore provisionally disabled. In user space the FPU is trapped and emulated by IEEE 754-1985 compliant software in the kernel, and this is handled accordingly by QEMU. Another example is the 93 multimedia instructions specific to the R5900 that generate provisional reserved instruction exception signals. One of the benefits of running a Linux distribution under QEMU is that programs can be compiled with a native compiler, where the host and target are the same, as opposed to a cross-compiler, where they are not the same. This is especially important in cases where the target hardware does not have the resources to run a native compiler. Problems with cross-compilation are often related to host and target differences in integer sizes, pointer sizes, endianness, machine code, ABI, etc. Sometimes cross-compilation is not even supported by the build script for a given package. One effective way to avoid those problems is to replace the cross-compiler with a native compiler. This change of compilation methods does not resolve the inherent problems with cross-compilation. The native compiler naturally replaces the cross-compiler, because one typically uses one or the other, and preferably the native compiler when the circumstances admit this. The native compiler is also a good test case for the R5900 QEMU user mode. Additionally, Gentoo is well- known for compiling and installing its packages from sources. This change has been tested with Gentoo compiled for R5900, including native compilation of several packages under QEMU. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Make R5900 DMULT[U], DDIV[U], LL[D] and SC[D] user onlyFredrik Noring1-1/+22
The Linux kernel traps certain reserved instruction exceptions to emulate the corresponding instructions. QEMU plays the role of the kernel in user mode, so those traps are emulated by accepting the instructions. This change adds the function check_insn_opc_user_only to signal a reserved instruction exception for flagged CPUs in QEMU system mode. The MIPS III instructions DMULT[U], DDIV[U], LL[D] and SC[D] are not implemented in R5900 hardware. They are trapped and emulated by the Linux kernel and, accordingly, therefore QEMU user only instructions. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Support R5900 MOVN, MOVZ and PREF instructions from MIPS IVFredrik Noring1-2/+3
The R5900 is taken to be MIPS III with certain modifications. From MIPS IV it implements the instructions MOVN, MOVZ and PREF. Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Support R5900 DIV1 and DIVU1 instructionsFredrik Noring1-3/+9
Add support for DIV1 and DIVU1 instructions. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Support R5900 MFLO1, MTLO1, MFHI1 and MTHI1 instructionsFredrik Noring1-6/+17
Add support for MFLO1, MTLO1, MFHI1 and MTHI1 instructions. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Support R5900 three-operand MULT1 and MULTU1 instructionsFredrik Noring1-3/+14
Add support for MULT1 and MULTU1 instructions. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Support R5900 three-operand MULT and MULTU instructionsFredrik Noring1-0/+74
The three-operand MULT and MULTU are the only R5900-specific instructions emitted by GCC 7.3. The R5900 also implements the three- operand MADD and MADDU instructions, but they are omitted in QEMU for now since they are absent in programs compiled by current GCC versions. Likewise, the R5900-specific pipeline 1 instruction variants MULT1, MULTU1, DIV1, DIVU1, MADD1, MADDU1, MFHI1, MFLO1, MTHI1 and MTLO1 are omitted here as well. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org> Signed-off-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
2018-10-24target/mips: Add a placeholder for R5900 MMI3 instruction subclassFredrik Noring1-1/+30
Add a placeholder for MMI3 subclass. Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com> Signed-off-by: Fredrik Noring <noring@nocrew.org> Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
generated by cgit v1.1 at 2025-01-01 01:48:29 +0000