1. 15 Feb, 2017 6 commits
  2. 09 Feb, 2017 3 commits
  3. 08 Feb, 2017 15 commits
  4. 07 Feb, 2017 8 commits
  5. 06 Feb, 2017 2 commits
  6. 03 Feb, 2017 6 commits
    • James Hogan's avatar
      KVM: MIPS: Allow multiple VCPUs to be created · 12ed1fae
      James Hogan authored
      Increase the maximum number of MIPS KVM VCPUs to 8, and implement the
      KVM_CAP_NR_VCPUS and KVM_CAP_MAX_CPUS capabilities which expose the
      recommended and maximum number of VCPUs to userland. The previous
      maximum of 1 didn't allow for any form of SMP guests.
      
      We calculate the values similarly to ARM, recommending as many VCPUs as
      there are CPUs online in the system. This will allow userland to know
      how many VCPUs it is possible to create.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      12ed1fae
    • James Hogan's avatar
      KVM: MIPS/T&E: Expose read-only CP0_IntCtl register · ad58d4d4
      James Hogan authored
      Expose the CP0_IntCtl register through the KVM register access API,
      which is a required register since MIPS32r2. It is currently read-only
      since the VS field isn't implemented due to lack of Config3.VInt or
      Config3.VEIC.
      
      It is implemented in trap_emul.c so that a VZ implementation can allow
      writes.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      ad58d4d4
    • James Hogan's avatar
      KVM: MIPS/T&E: Expose CP0_EntryLo0/1 registers · 013044cc
      James Hogan authored
      Expose the CP0_EntryLo0 and CP0_EntryLo1 registers through the KVM
      register access API. This is fairly straightforward for trap & emulate
      since we don't support the RI and XI bits. For the sake of future
      proofing (particularly for VZ) it is explicitly specified that the API
      always exposes the 64-bit version of these registers (i.e. with the RI
      and XI bits in bit positions 63 and 62 respectively), and they are
      implemented in trap_emul.c rather than mips.c to allow them to be
      implemented differently for VZ.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      013044cc
    • James Hogan's avatar
      KVM: MIPS/T&E: Default to reset vector · be67a0be
      James Hogan authored
      Set the default VCPU state closer to the architectural reset state, with
      PC pointing at the reset vector (uncached PA 0x1fc00000, which for KVM
      T&E is VA 0x5fc00000), and with CP0_Status.BEV and CP0_Status.ERL to 1.
      
      Although QEMU at least will overwrite this state, it makes sense to do
      this now that CP0_EBase is properly implemented to check BEV, and now
      that we support a sparse GPA layout potentially with a boot ROM at GPA
      0x1fc00000.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      be67a0be
    • James Hogan's avatar
      KVM: MIPS/T&E: Implement CP0_EBase register · 7801bbe1
      James Hogan authored
      The CP0_EBase register is a standard feature of MIPS32r2, so we should
      always have been implementing it properly. However the register value
      was ignored and wasn't exposed to userland.
      
      Fix the emulation of exceptions and interrupts to use the value stored
      in guest CP0_EBase, and fix the masks so that the top 3 bits (rather
      than the standard 2) are fixed, so that it is always in the guest KSeg0
      segment.
      
      Also add CP0_EBASE to the KVM one_reg interface so it can be accessed by
      userland, also allowing the CPU number field to be written (which isn't
      permitted by the guest).
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      7801bbe1
    • James Hogan's avatar
      KVM: MIPS/T&E: Move CP0 register access into T&E · 654229a0
      James Hogan authored
      Access to various CP0 registers via the KVM register access API needs to
      be implementation specific to allow restrictions to be made on changes,
      for example when VZ guest registers aren't present, so move them all
      into trap_emul.c in preparation for VZ.
      Signed-off-by: default avatarJames Hogan <james.hogan@imgtec.com>
      Cc: Paolo Bonzini <pbonzini@redhat.com>
      Cc: "Radim Krčmář" <rkrcmar@redhat.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: linux-mips@linux-mips.org
      Cc: kvm@vger.kernel.org
      654229a0