2ac031d171
This pull request is almost entirely an implementation of the draft hypervisor extension. This extension is still in draft and is expected to have incompatible changes before being frozen, but we've had good luck managing other RISC-V draft extensions in QEMU so far. Additionally, there's a fix to PCI addressing and some improvements to the M-mode timer. This boots linux and passes make check for me. -----BEGIN PGP SIGNATURE----- iQJHBAABCgAxFiEEKzw3R0RoQ7JKlDp6LhMZ81+7GIkFAl5do3gTHHBhbG1lckBk YWJiZWx0LmNvbQAKCRAuExnzX7sYiXhlD/9gtiGUT9QxnwygSAck2rLYJHN0rWLC 7FRUar9egPDQ9rtwYKYM5H9fqFzfAxoWc2CTGPPxm75fS49gmEU06p6jBM3gdnNf WGXPdwefeBhWHxuS0LoQodoLybNmB1H+prrZA6LjoQFbp6BHEdOzSeGBvrUvoYuZ MCX++mA39h3gRvuXQdMYdPec2DdP07cMRirpXUgzlGtQ5WYUK8fNMDYDNkc0vKQc aDFDnL7KHRgKt74Fs9LnlEUuZg5r8vEsf4h80SWwBxqDLbSUf9Sh/F8K1abxDUEo tAm/45mPwTXEbFtEGG9f7uHD6ul0GyoTnybCf/1EQgWUtrm6yhw9b69UUdziOW7/ LVFNjuX4zI175PP6pANb9QnPJnr+VRaCaBg+rXeju3OypkFNsQi6EwefkZFnn1Ye 9hteMOKNaiuYY5qcNXqskJ3j/lnoPTzNpsZKbDinyXARr/tslRqZdn1MU8J9FVUS M+w0qVgrHPHojmFAbzwKQIONExApiKBkhrV+K5tkbxNNnp3tYBqoLXW8HYpu4MWh PavscLRVdLzzBJ7AQHnSNmJVlgiAz/VwJh/v0KNhfwrQzE0XAxcCyUQ/1NMLTkjY CGP3jxV3Wnxf6BQObqrUEUKG0UOOwWmGhYe28suVt8ni4c8eDvZ/z6P+yxFj/v9q cn03WY6J3beQlw== =5W7J -----END PGP SIGNATURE----- Merge remote-tracking branch 'remotes/palmer/tags/riscv-for-master-5.0-sf3' into staging RISC-V Patches for the 5.0 Soft Freeze, Part 3 This pull request is almost entirely an implementation of the draft hypervisor extension. This extension is still in draft and is expected to have incompatible changes before being frozen, but we've had good luck managing other RISC-V draft extensions in QEMU so far. Additionally, there's a fix to PCI addressing and some improvements to the M-mode timer. This boots linux and passes make check for me. # gpg: Signature made Tue 03 Mar 2020 00:23:20 GMT # gpg: using RSA key 2B3C3747446843B24A943A7A2E1319F35FBB1889 # gpg: issuer "palmer@dabbelt.com" # gpg: Good signature from "Palmer Dabbelt <palmer@dabbelt.com>" [unknown] # gpg: aka "Palmer Dabbelt <palmer@sifive.com>" [unknown] # gpg: aka "Palmer Dabbelt <palmerdabbelt@google.com>" [unknown] # 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 # Subkey fingerprint: 2B3C 3747 4468 43B2 4A94 3A7A 2E13 19F3 5FBB 1889 * remotes/palmer/tags/riscv-for-master-5.0-sf3: (38 commits) hw/riscv: Provide rdtime callback for TCG in CLINT emulation target/riscv: Emulate TIME CSRs for privileged mode riscv: virt: Allow PCI address 0 target/riscv: Allow enabling the Hypervisor extension target/riscv: Add the MSTATUS_MPV_ISSET helper macro target/riscv: Add support for the 32-bit MSTATUSH CSR target/riscv: Set htval and mtval2 on execptions target/riscv: Raise the new execptions when 2nd stage translation fails target/riscv: Implement second stage MMU target/riscv: Allow specifying MMU stage target/riscv: Respect MPRV and SPRV for floating point ops target/riscv: Mark both sstatus and msstatus_hs as dirty target/riscv: Disable guest FP support based on virtual status target/riscv: Only set TB flags with FP status if enabled target/riscv: Remove the hret instruction target/riscv: Add hfence instructions target/riscv: Add Hypervisor trap return support target/riscv: Add hypvervisor trap support target/riscv: Generate illegal instruction on WFI when V=1 target/ricsv: Flush the TLB on virtulisation mode changes ... Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
=========== QEMU README =========== QEMU is a generic and open source machine & userspace emulator and virtualizer. QEMU is capable of emulating a complete machine in software without any need for hardware virtualization support. By using dynamic translation, it achieves very good performance. QEMU can also integrate with the Xen and KVM hypervisors to provide emulated hardware while allowing the hypervisor to manage the CPU. With hypervisor support, QEMU can achieve near native performance for CPUs. When QEMU emulates CPUs directly it is capable of running operating systems made for one machine (e.g. an ARMv7 board) on a different machine (e.g. an x86_64 PC board). QEMU is also capable of providing userspace API virtualization for Linux and BSD kernel interfaces. This allows binaries compiled against one architecture ABI (e.g. the Linux PPC64 ABI) to be run on a host using a different architecture ABI (e.g. the Linux x86_64 ABI). This does not involve any hardware emulation, simply CPU and syscall emulation. QEMU aims to fit into a variety of use cases. It can be invoked directly by users wishing to have full control over its behaviour and settings. It also aims to facilitate integration into higher level management layers, by providing a stable command line interface and monitor API. It is commonly invoked indirectly via the libvirt library when using open source applications such as oVirt, OpenStack and virt-manager. QEMU as a whole is released under the GNU General Public License, version 2. For full licensing details, consult the LICENSE file. Building ======== QEMU is multi-platform software intended to be buildable on all modern Linux platforms, OS-X, Win32 (via the Mingw64 toolchain) and a variety of other UNIX targets. The simple steps to build QEMU are: .. code-block:: shell mkdir build cd build ../configure make Additional information can also be found online via the QEMU website: * `<https://qemu.org/Hosts/Linux>`_ * `<https://qemu.org/Hosts/Mac>`_ * `<https://qemu.org/Hosts/W32>`_ Submitting patches ================== The QEMU source code is maintained under the GIT version control system. .. code-block:: shell git clone https://git.qemu.org/git/qemu.git When submitting patches, one common approach is to use 'git format-patch' and/or 'git send-email' to format & send the mail to the qemu-devel@nongnu.org mailing list. All patches submitted must contain a 'Signed-off-by' line from the author. Patches should follow the guidelines set out in the CODING_STYLE.rst file. Additional information on submitting patches can be found online via the QEMU website * `<https://qemu.org/Contribute/SubmitAPatch>`_ * `<https://qemu.org/Contribute/TrivialPatches>`_ The QEMU website is also maintained under source control. .. code-block:: shell git clone https://git.qemu.org/git/qemu-web.git * `<https://www.qemu.org/2017/02/04/the-new-qemu-website-is-up/>`_ A 'git-publish' utility was created to make above process less cumbersome, and is highly recommended for making regular contributions, or even just for sending consecutive patch series revisions. It also requires a working 'git send-email' setup, and by default doesn't automate everything, so you may want to go through the above steps manually for once. For installation instructions, please go to * `<https://github.com/stefanha/git-publish>`_ The workflow with 'git-publish' is: .. code-block:: shell $ git checkout master -b my-feature $ # work on new commits, add your 'Signed-off-by' lines to each $ git publish Your patch series will be sent and tagged as my-feature-v1 if you need to refer back to it in the future. Sending v2: .. code-block:: shell $ git checkout my-feature # same topic branch $ # making changes to the commits (using 'git rebase', for example) $ git publish Your patch series will be sent with 'v2' tag in the subject and the git tip will be tagged as my-feature-v2. Bug reporting ============= The QEMU project uses Launchpad as its primary upstream bug tracker. Bugs found when running code built from QEMU git or upstream released sources should be reported via: * `<https://bugs.launchpad.net/qemu/>`_ If using QEMU via an operating system vendor pre-built binary package, it is preferable to report bugs to the vendor's own bug tracker first. If the bug is also known to affect latest upstream code, it can also be reported via launchpad. For additional information on bug reporting consult: * `<https://qemu.org/Contribute/ReportABug>`_ Contact ======= The QEMU community can be contacted in a number of ways, with the two main methods being email and IRC * `<mailto:qemu-devel@nongnu.org>`_ * `<https://lists.nongnu.org/mailman/listinfo/qemu-devel>`_ * #qemu on irc.oftc.net Information on additional methods of contacting the community can be found online via the QEMU website: * `<https://qemu.org/Contribute/StartHere>`_