Re: [PATCH V7 00/15] KVM: MIPS: Add Loongson-3 support (Host Side)

[Paolo Bonzini <pbonzini@redhat.com>]

On 23/05/20 09:56, Huacai Chen wrote:
> We are preparing to add KVM support for Loongson-3. VZ extension is
> fully supported in Loongson-3A R4+, and we will not care about old CPUs
> (at least now). We already have a full functional Linux kernel (based
> on Linux-5.4.x LTS) and QEMU (based on 5.0.0) and their git repositories
> are here:
> 
> QEMU: https://github.com/chenhuacai/qemu
> Kernel: https://github.com/chenhuacai/linux
> 
> Of course these two repositories need to be rework and not suitable for
> upstream (especially the commits need to be splitted). We show them here
> is just to tell others what we have done, and how KVM/Loongson will look
> like.
> 
> Our plan is make the KVM host side be upstream first, and after that,
> we will make the KVM guest side and QEMU emulator be upstream.
> 
> V1 -> V2:
> 1, Remove "mips: define pud_index() regardless of page table folding"
>    because it has been applied.
> 2, Make Loongson-specific code be guarded by CONFIG_CPU_LOONGSON64.
> 
> V2 -> V3:
> 1, Emulate a reduced feature list of CPUCFG.
> 2, Fix all possible checkpatch.pl errors and warnings.
> 
> V3 -> V4:
> 1, Emulate LOONGSON_CFG0/LOONGSON_CFG3 in CPUCFG correctly.
> 2, Update commit messages to explain Loongson-3 Virtual IPI.
> 3, Add Reviewed-by: Aleksandar Markovic <aleksandar.qemu.devel@gmail.com>.
> 
> V4 -> V5:
> 1, Fix a typo.
> 2, Update MAINTAINERS.
> 
> V5 -> V6:
> 1, Fix a mismatch during rebasing.
> 2, Add Acked-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>.
> 
> V6 -> V7:
> 1, Rebase on latest mips-next (Config6 feature bits definition updated).

Queued, thanks.  Please check the queue branch of kvm.git.

Paolo

> Xing Li(2):
>  KVM: MIPS: Define KVM_ENTRYHI_ASID to cpu_asid_mask(&boot_cpu_data)
>  KVM: MIPS: Fix VPN2_MASK definition for variable cpu_vmbits
> 
> Huacai Chen(13):
>  KVM: MIPS: Increase KVM_MAX_VCPUS and KVM_USER_MEM_SLOTS to 16
>  KVM: MIPS: Add EVENTFD support which is needed by VHOST
>  KVM: MIPS: Use lddir/ldpte instructions to lookup gpa_mm.pgd
>  KVM: MIPS: Introduce and use cpu_guest_has_ldpte
>  KVM: MIPS: Use root tlb to control guest's CCA for Loongson-3
>  KVM: MIPS: Let indexed cacheops cause guest exit on Loongson-3
>  KVM: MIPS: Add more types of virtual interrupts
>  KVM: MIPS: Add Loongson-3 Virtual IPI interrupt support
>  KVM: MIPS: Add CPUCFG emulation for Loongson-3
>  KVM: MIPS: Add CONFIG6 and DIAG registers emulation
>  KVM: MIPS: Add more MMIO load/store instructions emulation
>  KVM: MIPS: Enable KVM support for Loongson-3
>  MAINTAINERS: Update KVM/MIPS maintainers
> 
> Signed-off-by: Huacai Chen <chenhc@lemote.com>
> ---
>  MAINTAINERS                          |   4 +-
>  arch/mips/Kconfig                    |   1 +
>  arch/mips/include/asm/cpu-features.h |   3 +
>  arch/mips/include/asm/kvm_host.h     |  52 +++-
>  arch/mips/include/asm/mipsregs.h     |   7 +
>  arch/mips/include/uapi/asm/inst.h    |  11 +
>  arch/mips/kernel/cpu-probe.c         |   2 +
>  arch/mips/kvm/Kconfig                |   1 +
>  arch/mips/kvm/Makefile               |   5 +-
>  arch/mips/kvm/emulate.c              | 503 ++++++++++++++++++++++++++++++++++-
>  arch/mips/kvm/entry.c                |  19 +-
>  arch/mips/kvm/interrupt.c            |  93 +------
>  arch/mips/kvm/interrupt.h            |  14 +-
>  arch/mips/kvm/loongson_ipi.c         | 214 +++++++++++++++
>  arch/mips/kvm/mips.c                 |  49 +++-
>  arch/mips/kvm/tlb.c                  |  41 +++
>  arch/mips/kvm/trap_emul.c            |   3 +
>  arch/mips/kvm/vz.c                   | 237 ++++++++++++-----
>  18 files changed, 1092 insertions(+), 167 deletions(-)
>  create mode 100644 arch/mips/kvm/loongson_ipi.c
> --
> 2.7.0
>