1. 28 7月, 2014 2 次提交
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      KVM: PPC: Book3S: Allow only implemented hcalls to be enabled or disabled · ae2113a4
      Paul Mackerras 提交于
      This adds code to check that when the KVM_CAP_PPC_ENABLE_HCALL
      capability is used to enable or disable in-kernel handling of an
      hcall, that the hcall is actually implemented by the kernel.
      If not an EINVAL error is returned.
      
      This also checks the default-enabled list of hcalls and prints a
      warning if any hcall there is not actually implemented.
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      ae2113a4
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      KVM: PPC: Book3S: Controls for in-kernel sPAPR hypercall handling · 699a0ea0
      Paul Mackerras 提交于
      This provides a way for userspace controls which sPAPR hcalls get
      handled in the kernel.  Each hcall can be individually enabled or
      disabled for in-kernel handling, except for H_RTAS.  The exception
      for H_RTAS is because userspace can already control whether
      individual RTAS functions are handled in-kernel or not via the
      KVM_PPC_RTAS_DEFINE_TOKEN ioctl, and because the numeric value for
      H_RTAS is out of the normal sequence of hcall numbers.
      
      Hcalls are enabled or disabled using the KVM_ENABLE_CAP ioctl for the
      KVM_CAP_PPC_ENABLE_HCALL capability on the file descriptor for the VM.
      The args field of the struct kvm_enable_cap specifies the hcall number
      in args[0] and the enable/disable flag in args[1]; 0 means disable
      in-kernel handling (so that the hcall will always cause an exit to
      userspace) and 1 means enable.  Enabling or disabling in-kernel
      handling of an hcall is effective across the whole VM.
      
      The ability for KVM_ENABLE_CAP to be used on a VM file descriptor
      on PowerPC is new, added by this commit.  The KVM_CAP_ENABLE_CAP_VM
      capability advertises that this ability exists.
      
      When a VM is created, an initial set of hcalls are enabled for
      in-kernel handling.  The set that is enabled is the set that have
      an in-kernel implementation at this point.  Any new hcall
      implementations from this point onwards should not be added to the
      default set without a good reason.
      
      No distinction is made between real-mode and virtual-mode hcall
      implementations; the one setting controls them both.
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      699a0ea0
  2. 30 5月, 2014 4 次提交
    • A
      KVM: PPC: Add CAP to indicate hcall fixes · f2e91042
      Alexander Graf 提交于
      We worked around some nasty KVM magic page hcall breakages:
      
        1) NX bit not honored, so ignore NX when we detect it
        2) LE guests swizzle hypercall instruction
      
      Without these fixes in place, there's no way it would make sense to expose kvm
      hypercalls to a guest. Chances are immensely high it would trip over and break.
      
      So add a new CAP that gives user space a hint that we have workarounds for the
      bugs above in place. It can use those as hint to disable PV hypercalls when
      the guest CPU is anything POWER7 or higher and the host does not have fixes
      in place.
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      f2e91042
    • A
      KVM: PPC: Disable NX for old magic page using guests · f3383cf8
      Alexander Graf 提交于
      Old guests try to use the magic page, but map their trampoline code inside
      of an NX region.
      
      Since we can't fix those old kernels, try to detect whether the guest is sane
      or not. If not, just disable NX functionality in KVM so that old guests at
      least work at all. For newer guests, add a bit that we can set to keep NX
      functionality available.
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      f3383cf8
    • A
      KVM: PPC: Make shared struct aka magic page guest endian · 5deb8e7a
      Alexander Graf 提交于
      The shared (magic) page is a data structure that contains often used
      supervisor privileged SPRs accessible via memory to the user to reduce
      the number of exits we have to take to read/write them.
      
      When we actually share this structure with the guest we have to maintain
      it in guest endianness, because some of the patch tricks only work with
      native endian load/store operations.
      
      Since we only share the structure with either host or guest in little
      endian on book3s_64 pr mode, we don't have to worry about booke or book3s hv.
      
      For booke, the shared struct stays big endian. For book3s_64 hv we maintain
      the struct in host native endian, since it never gets shared with the guest.
      
      For book3s_64 pr we introduce a variable that tells us which endianness the
      shared struct is in and route every access to it through helper inline
      functions that evaluate this variable.
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      5deb8e7a
    • A
      KVM: PPC: PR: Fill pvinfo hcall instructions in big endian · 2743103f
      Alexander Graf 提交于
      We expose a blob of hypercall instructions to user space that it gives to
      the guest via device tree again. That blob should contain a stream of
      instructions necessary to do a hypercall in big endian, as it just gets
      passed into the guest and old guests use them straight away.
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      2743103f
  3. 28 5月, 2014 1 次提交
  4. 27 1月, 2014 2 次提交
    • S
      kvm/ppc: IRQ disabling cleanup · 6c85f52b
      Scott Wood 提交于
      Simplify the handling of lazy EE by going directly from fully-enabled
      to hard-disabled.  This replaces the lazy_irq_pending() check
      (including its misplaced kvm_guest_exit() call).
      
      As suggested by Tiejun Chen, move the interrupt disabling into
      kvmppc_prepare_to_enter() rather than have each caller do it.  Also
      move the IRQ enabling on heavyweight exit into
      kvmppc_prepare_to_enter().
      Signed-off-by: NScott Wood <scottwood@freescale.com>
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      6c85f52b
    • C
      KVM: PPC: Book3S: MMIO emulation support for little endian guests · 73601775
      Cédric Le Goater 提交于
      MMIO emulation reads the last instruction executed by the guest
      and then emulates. If the guest is running in Little Endian order,
      or more generally in a different endian order of the host, the
      instruction needs to be byte-swapped before being emulated.
      
      This patch adds a helper routine which tests the endian order of
      the host and the guest in order to decide whether a byteswap is
      needed or not. It is then used to byteswap the last instruction
      of the guest in the endian order of the host before MMIO emulation
      is performed.
      
      Finally, kvmppc_handle_load() of kvmppc_handle_store() are modified
      to reverse the endianness of the MMIO if required.
      Signed-off-by: NCédric Le Goater <clg@fr.ibm.com>
      [agraf: add booke handling]
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      73601775
  5. 09 1月, 2014 1 次提交
  6. 18 10月, 2013 2 次提交
  7. 17 10月, 2013 4 次提交
  8. 04 9月, 2013 1 次提交
  9. 18 7月, 2013 1 次提交
  10. 11 7月, 2013 1 次提交
  11. 02 5月, 2013 2 次提交
  12. 27 4月, 2013 6 次提交
  13. 17 4月, 2013 1 次提交
  14. 22 3月, 2013 1 次提交
  15. 05 3月, 2013 3 次提交
  16. 10 1月, 2013 2 次提交
    • A
      KVM: PPC: BookE: Implement EPR exit · 1c810636
      Alexander Graf 提交于
      The External Proxy Facility in FSL BookE chips allows the interrupt
      controller to automatically acknowledge an interrupt as soon as a
      core gets its pending external interrupt delivered.
      
      Today, user space implements the interrupt controller, so we need to
      check on it during such a cycle.
      
      This patch implements logic for user space to enable EPR exiting,
      disable EPR exiting and EPR exiting itself, so that user space can
      acknowledge an interrupt when an external interrupt has successfully
      been delivered into the guest vcpu.
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      1c810636
    • A
      KVM: PPC: Only WARN on invalid emulation · 5a33169e
      Alexander Graf 提交于
      When we hit an emulation result that we didn't expect, that is an error,
      but it's nothing that warrants a BUG(), because it can be guest triggered.
      
      So instead, let's only WARN() the user that this happened.
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      5a33169e
  17. 14 12月, 2012 1 次提交
  18. 06 12月, 2012 2 次提交
    • P
      KVM: PPC: Book3S HV: Provide a method for userspace to read and write the HPT · a2932923
      Paul Mackerras 提交于
      A new ioctl, KVM_PPC_GET_HTAB_FD, returns a file descriptor.  Reads on
      this fd return the contents of the HPT (hashed page table), writes
      create and/or remove entries in the HPT.  There is a new capability,
      KVM_CAP_PPC_HTAB_FD, to indicate the presence of the ioctl.  The ioctl
      takes an argument structure with the index of the first HPT entry to
      read out and a set of flags.  The flags indicate whether the user is
      intending to read or write the HPT, and whether to return all entries
      or only the "bolted" entries (those with the bolted bit, 0x10, set in
      the first doubleword).
      
      This is intended for use in implementing qemu's savevm/loadvm and for
      live migration.  Therefore, on reads, the first pass returns information
      about all HPTEs (or all bolted HPTEs).  When the first pass reaches the
      end of the HPT, it returns from the read.  Subsequent reads only return
      information about HPTEs that have changed since they were last read.
      A read that finds no changed HPTEs in the HPT following where the last
      read finished will return 0 bytes.
      
      The format of the data provides a simple run-length compression of the
      invalid entries.  Each block of data starts with a header that indicates
      the index (position in the HPT, which is just an array), the number of
      valid entries starting at that index (may be zero), and the number of
      invalid entries following those valid entries.  The valid entries, 16
      bytes each, follow the header.  The invalid entries are not explicitly
      represented.
      Signed-off-by: NPaul Mackerras <paulus@samba.org>
      [agraf: fix documentation]
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      a2932923
    • A
      KVM: PPC: Support eventfd · 0e673fb6
      Alexander Graf 提交于
      In order to support the generic eventfd infrastructure on PPC, we need
      to call into the generic KVM in-kernel device mmio code.
      Signed-off-by: NAlexander Graf <agraf@suse.de>
      0e673fb6
  19. 28 11月, 2012 1 次提交
  20. 06 10月, 2012 2 次提交