| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <4cf93458-e5e1-d02d-4728-c2ddb4ea2088@loongson.cn>
Date: Tue, 18 Apr 2023 17:19:59 +0800
From: Tianrui Zhao <zhaotianrui@...ngson.cn>
To: Paolo Bonzini <pbonzini@...hat.com>
Cc: Huacai Chen <chenhuacai@...nel.org>,
WANG Xuerui <kernel@...0n.name>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
loongarch@...ts.linux.dev, linux-kernel@...r.kernel.org,
kvm@...r.kernel.org, Jens Axboe <axboe@...nel.dk>,
Mark Brown <broonie@...nel.org>,
Alex Deucher <alexander.deucher@....com>,
Oliver Upton <oliver.upton@...ux.dev>, maobibo@...ngson.cn,
Xi Ruoyao <xry111@...111.site>
Subject: Re: [PATCH v7 00/30] Add KVM LoongArch support
Please ignore this mail message, as it is not a complete patch series.
Please see the next V7 patches I have sent.
Thanks
Tianrui Zhao
在 2023年04月17日 17:46, Tianrui Zhao 写道:
> This series adds KVM LoongArch support. Loongson 3A5000 supports hardware
> assisted virtualization. With cpu virtualization, there are separate
> hw-supported user mode and kernel mode in guest mode. With memory
> virtualization, there are two-level hw mmu table for guest mode and host
> mode. Also there is separate hw cpu timer with consant frequency in
> guest mode, so that vm can migrate between hosts with different freq.
> Currently, we are able to boot LoongArch Linux Guests.
>
> Few key aspects of KVM LoongArch added by this series are:
> 1. Enable kvm hardware function when kvm module is loaded.
> 2. Implement VM and vcpu related ioctl interface such as vcpu create,
> vcpu run etc. GET_ONE_REG/SET_ONE_REG ioctl commands are use to
> get general registers one by one.
> 3. Hardware access about MMU, timer and csr are emulated in kernel.
> 4. Hardwares such as mmio and iocsr device are emulated in user space
> such as APIC, IPI, pci devices etc.
>
> The running environment of LoongArch virt machine:
> 1. Cross tools to build kernel and uefi:
> $ wget https://github.com/loongson/build-tools/releases/download/2022.09.06/loongarch64-clfs-6.3-cross-tools-gcc-glibc.tar.xz
> tar -vxf loongarch64-clfs-6.3-cross-tools-gcc-glibc.tar.xz -C /opt
> export PATH=/opt/cross-tools/bin:$PATH
> export LD_LIBRARY_PATH=/opt/cross-tools/lib:$LD_LIBRARY_PATH
> export LD_LIBRARY_PATH=/opt/cross-tools/loongarch64-unknown-linux-gnu/lib/:$LD_LIBRARY_PATH
> 2. This series is based on the linux source code:
> https://github.com/loongson/linux-loongarch-kvm
> Build command:
> git checkout kvm-loongarch
> make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu- loongson3_defconfig
> make ARCH=loongarch CROSS_COMPILE=loongarch64-unknown-linux-gnu-
> 3. QEMU hypervisor with LoongArch supported:
> https://github.com/loongson/qemu
> Build command:
> git checkout kvm-loongarch
> ./configure --target-list="loongarch64-softmmu" --enable-kvm
> make
> 4. Uefi bios of LoongArch virt machine:
> Link: https://github.com/tianocore/edk2-platforms/tree/master/Platform/Loongson/LoongArchQemuPkg#readme
> 5. you can also access the binary files we have already build:
> https://github.com/yangxiaojuan-loongson/qemu-binary
> The command to boot loongarch virt machine:
> $ qemu-system-loongarch64 -machine virt -m 4G -cpu la464 \
> -smp 1 -bios QEMU_EFI.fd -kernel vmlinuz.efi -initrd ramdisk \
> -serial stdio -monitor telnet:localhost:4495,server,nowait \
> -append "root=/dev/ram rdinit=/sbin/init console=ttyS0,115200" \
> --nographic
>
> Changes for v7:
> 1. Fix the kvm_save/restore_hw_gcsr compiling warnings reported by
> kernel test robot. The report link is:
> https://lore.kernel.org/oe-kbuild-all/202304131526.iXfLaVZc-lkp@intel.com/
> 2. Fix loongarch kvm trace related compiling problems.
>
> Changes for v6:
> 1. Fix the Documentation/virt/kvm/api.rst compile warning about
> loongarch parts.
>
> Changes for v5:
> 1. Implement get/set mp_state ioctl interface, and only the
> KVM_MP_STATE_RUNNABLE state is supported now, and other states
> will be completed in the future. The state is also used when vcpu
> run idle instruction, if vcpu state is changed to RUNNABLE, the
> vcpu will have the possibility to be woken up.
> 2. Supplement kvm document about loongarch-specific part, such as add
> api introduction for GET/SET_ONE_REG, GET/SET_FPU, GET/SET_MP_STATE,
> etc.
> 3. Improve the kvm_switch_to_guest function in switch.S, remove the
> previous tmp,tmp1 arguments and replace it with t0,t1 reg.
>
> Changes for v4:
> 1. Add a csr_need_update flag in _vcpu_put, as most csr registers keep
> unchanged during process context switch, so we need not to update it
> every time. We can do this only if the soft csr is different form hardware.
> That is to say all of csrs should update after vcpu enter guest, as for
> set_csr_ioctl, we have written soft csr to keep consistent with hardware.
> 2. Improve get/set_csr_ioctl interface, we set SW or HW or INVALID flag
> for all csrs according to it's features when kvm init. In get/set_csr_ioctl,
> if csr is HW, we use gcsrrd/ gcsrwr instruction to access it, else if csr is
> SW, we use software to emulate it, and others return false.
> 3. Add set_hw_gcsr function in csr_ops.S, and it is used in set_csr_ioctl.
> We have splited hw gcsr into three parts, so we can calculate the code offset
> by gcsrid and jump here to run the gcsrwr instruction. We use this function to
> make the code easier and avoid to use the previous SET_HW_GCSR(XXX) interface.
> 4. Improve kvm mmu functions, such as flush page table and make clean page table
> interface.
>
> Changes for v3:
> 1. Remove the vpid array list in kvm_vcpu_arch and use a vpid variable here,
> because a vpid will never be recycled if a vCPU migrates from physical CPU A
> to B and back to A.
> 2. Make some constant variables in kvm_context to global such as vpid_mask,
> guest_eentry, enter_guest, etc.
> 3. Add some new tracepoints, such as kvm_trace_idle, kvm_trace_cache,
> kvm_trace_gspr, etc.
> 4. There are some duplicate codes in kvm_handle_exit and kvm_vcpu_run,
> so we move it to a new function kvm_pre_enter_guest.
> 5. Change the RESUME_HOST, RESUME_GUEST value, return 1 for resume guest
> and "<= 0" for resume host.
> 6. Fcsr and fpu registers are saved/restored together.
>
> Changes for v2:
> 1. Seprate the original patch-01 and patch-03 into small patches, and the
> patches mainly contain kvm module init, module exit, vcpu create, vcpu run,
> etc.
> 2. Remove the original KVM_{GET,SET}_CSRS ioctl in the kvm uapi header,
> and we use the common KVM_{GET,SET}_ONE_REG to access register.
> 3. Use BIT(x) to replace the "1 << n_bits" statement.
>
> Tianrui Zhao (30):
> LoongArch: KVM: Add kvm related header files
> LoongArch: KVM: Implement kvm module related interface
> LoongArch: KVM: Implement kvm hardware enable, disable interface
> LoongArch: KVM: Implement VM related functions
> LoongArch: KVM: Add vcpu related header files
> LoongArch: KVM: Implement vcpu create and destroy interface
> LoongArch: KVM: Implement vcpu run interface
> LoongArch: KVM: Implement vcpu handle exit interface
> LoongArch: KVM: Implement vcpu get, vcpu set registers
> LoongArch: KVM: Implement vcpu ENABLE_CAP ioctl interface
> LoongArch: KVM: Implement fpu related operations for vcpu
> LoongArch: KVM: Implement vcpu interrupt operations
> LoongArch: KVM: Implement misc vcpu related interfaces
> LoongArch: KVM: Implement vcpu load and vcpu put operations
> LoongArch: KVM: Implement vcpu status description
> LoongArch: KVM: Implement update VM id function
> LoongArch: KVM: Implement virtual machine tlb operations
> LoongArch: KVM: Implement vcpu timer operations
> LoongArch: KVM: Implement kvm mmu operations
> LoongArch: KVM: Implement handle csr excption
> LoongArch: KVM: Implement handle iocsr exception
> LoongArch: KVM: Implement handle idle exception
> LoongArch: KVM: Implement handle gspr exception
> LoongArch: KVM: Implement handle mmio exception
> LoongArch: KVM: Implement handle fpu exception
> LoongArch: KVM: Implement kvm exception vector
> LoongArch: KVM: Implement vcpu world switch
> LoongArch: KVM: Implement probe virtualization when loongarch cpu init
> LoongArch: KVM: Enable kvm config and add the makefile
> LoongArch: KVM: Supplement kvm document about loongarch-specific part
>
> Documentation/virt/kvm/api.rst | 71 +-
> arch/loongarch/Kbuild | 1 +
> arch/loongarch/Kconfig | 2 +
> arch/loongarch/configs/loongson3_defconfig | 2 +
> arch/loongarch/include/asm/cpu-features.h | 22 +
> arch/loongarch/include/asm/cpu-info.h | 13 +
> arch/loongarch/include/asm/inst.h | 16 +
> arch/loongarch/include/asm/kvm_csr.h | 58 ++
> arch/loongarch/include/asm/kvm_host.h | 268 +++++++
> arch/loongarch/include/asm/kvm_types.h | 11 +
> arch/loongarch/include/asm/kvm_vcpu.h | 114 +++
> arch/loongarch/include/asm/loongarch.h | 213 ++++-
> arch/loongarch/include/uapi/asm/kvm.h | 107 +++
> arch/loongarch/kernel/asm-offsets.c | 32 +
> arch/loongarch/kernel/cpu-probe.c | 53 ++
> arch/loongarch/kvm/Kconfig | 38 +
> arch/loongarch/kvm/Makefile | 22 +
> arch/loongarch/kvm/csr_ops.S | 76 ++
> arch/loongarch/kvm/exit.c | 707 +++++++++++++++++
> arch/loongarch/kvm/interrupt.c | 126 +++
> arch/loongarch/kvm/main.c | 340 ++++++++
> arch/loongarch/kvm/mmu.c | 730 +++++++++++++++++
> arch/loongarch/kvm/switch.S | 301 +++++++
> arch/loongarch/kvm/timer.c | 266 +++++++
> arch/loongarch/kvm/tlb.c | 31 +
> arch/loongarch/kvm/trace.h | 168 ++++
> arch/loongarch/kvm/vcpu.c | 882 +++++++++++++++++++++
> arch/loongarch/kvm/vm.c | 79 ++
> arch/loongarch/kvm/vmid.c | 65 ++
> include/uapi/linux/kvm.h | 9 +
> 30 files changed, 4808 insertions(+), 15 deletions(-)
> create mode 100644 arch/loongarch/include/asm/kvm_csr.h
> create mode 100644 arch/loongarch/include/asm/kvm_host.h
> create mode 100644 arch/loongarch/include/asm/kvm_types.h
> create mode 100644 arch/loongarch/include/asm/kvm_vcpu.h
> create mode 100644 arch/loongarch/include/uapi/asm/kvm.h
> create mode 100644 arch/loongarch/kvm/Kconfig
> create mode 100644 arch/loongarch/kvm/Makefile
> create mode 100644 arch/loongarch/kvm/csr_ops.S
> create mode 100644 arch/loongarch/kvm/exit.c
> create mode 100644 arch/loongarch/kvm/interrupt.c
> create mode 100644 arch/loongarch/kvm/main.c
> create mode 100644 arch/loongarch/kvm/mmu.c
> create mode 100644 arch/loongarch/kvm/switch.S
> create mode 100644 arch/loongarch/kvm/timer.c
> create mode 100644 arch/loongarch/kvm/tlb.c
> create mode 100644 arch/loongarch/kvm/trace.h
> create mode 100644 arch/loongarch/kvm/vcpu.c
> create mode 100644 arch/loongarch/kvm/vm.c
> create mode 100644 arch/loongarch/kvm/vmid.c
>
Powered by blists - more mailing lists