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  1. 26 9月, 2011 12 次提交
    • P
      KVM: PPC: Assemble book3s{,_hv}_rmhandlers.S separately · 177339d7
      由 Paul Mackerras 提交于 
      This makes arch/powerpc/kvm/book3s_rmhandlers.S and
arch/powerpc/kvm/book3s_hv_rmhandlers.S be assembled as
separate compilation units rather than having them #included in
arch/powerpc/kernel/exceptions-64s.S.  We no longer have any
conditional branches between the exception prologs in
exceptions-64s.S and the KVM handlers, so there is no need to
keep their contents close together in the vmlinux image.

In their current location, they are using up part of the limited
space between the first-level interrupt handlers and the firmware
NMI data area at offset 0x7000, and with some kernel configurations
this area will overflow (e.g. allyesconfig), leading to an
"attempt to .org backwards" error when compiling exceptions-64s.S.

Moving them out requires that we add some #includes that the
book3s_{,hv_}rmhandlers.S code was previously getting implicitly
via exceptions-64s.S.
Signed-off-by: NPaul Mackerras <paulus@samba.org>
Signed-off-by: NAlexander Graf <agraf@suse.de>
      177339d7
    • A
      KVM: PPC: Add sanity checking to vcpu_run · af8f38b3
      由 Alexander Graf 提交于 
      There are multiple features in PowerPC KVM that can now be enabled
depending on the user's wishes. Some of the combinations don't make
sense or don't work though.

So this patch adds a way to check if the executing environment would
actually be able to run the guest properly. It also adds sanity
checks if PVR is set (should always be true given the current code
flow), if PAPR is only used with book3s_64 where it works and that
HV KVM is only used in PAPR mode.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      af8f38b3
    • A
      KVM: PPC: Enable the PAPR CAP for Book3S · 930b412a
      由 Alexander Graf 提交于 
      Now that Book3S PV mode can also run PAPR guests, we can add a PAPR cap and
enable it for all Book3S targets. Enabling that CAP switches KVM into PAPR
mode.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      930b412a
    • A
      KVM: PPC: Support SC1 hypercalls for PAPR in PR mode · a668f2bd
      由 Alexander Graf 提交于 
      PAPR defines hypercalls as SC1 instructions. Using these, the guest modifies
page tables and does other privileged operations that it wouldn't be allowed
to do in supervisor mode.

This patch adds support for PR KVM to trap these instructions and route them
through the same PAPR hypercall interface that we already use for HV style
KVM.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      a668f2bd
    • A
      KVM: PPC: Stub emulate CFAR and PURR SPRs · aacf9aa3
      由 Alexander Graf 提交于 
      Recent Linux versions use the CFAR and PURR SPRs, but don't really care about
their contents (yet). So for now, we can simply return 0 when the guest wants
to read them.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      aacf9aa3
    • A
      KVM: PPC: Add PAPR hypercall code for PR mode · 0254f074
      由 Alexander Graf 提交于 
      When running a PAPR guest, we need to handle a few hypercalls in kernel space,
most prominently the page table invalidation (to sync the shadows).

So this patch adds handling for a few PAPR hypercalls to PR mode KVM. I tried
to share the code with HV mode, but it ended up being a lot easier this way
around, as the two differ too much in those details.
Signed-off-by: NAlexander Graf <agraf@suse.de>

---

v1 -> v2:

  - whitespace fix
      0254f074
    • A
      KVM: PPC: Add support for explicit HIOR setting · a15bd354
      由 Alexander Graf 提交于 
      Until now, we always set HIOR based on the PVR, but this is just wrong.
Instead, we should be setting HIOR explicitly, so user space can decide
what the initial HIOR value is - just like on real hardware.

We keep the old PVR based way around for backwards compatibility, but
once user space uses the SREGS based method, we drop the PVR logic.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      a15bd354
    • A
      KVM: PPC: Read out syscall instruction on trap · 77e675ad
      由 Alexander Graf 提交于 
      We have a few traps where we cache the instruction that cause the trap
for analysis later on. Since we now need to be able to distinguish
between SC 0 and SC 1 system calls and the only way to find out which
is which is by looking at the instruction, we also read out the instruction
causing the system call.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      77e675ad
    • A
      KVM: PPC: Interpret SDR1 as HVA in PAPR mode · 04fcc11b
      由 Alexander Graf 提交于 
      When running a PAPR guest, the guest is not allowed to set SDR1 - instead
the HTAB information is held in internal hypervisor structures. But all of
our current code relies on SDR1 and walking the HTAB like on real hardware.

So in order to not be too intrusive, we simply set SDR1 to the HTAB we hold
in host memory. That way we can keep the HTAB in user space, but use it from
kernel space to map the guest.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      04fcc11b
    • A
      KVM: PPC: Check privilege level on SPRs · 317a8fa3
      由 Alexander Graf 提交于 
      We have 3 privilege levels: problem state, supervisor state and hypervisor
state. Each of them can access different SPRs, so we need to check on every
SPR if it's accessible in the respective mode.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      317a8fa3
    • A
      KVM: PPC: Add papr_enabled flag · 9432ba60
      由 Alexander Graf 提交于 
      When running a PAPR guest, some things change. The privilege level drops
from hypervisor to supervisor, SDR1 gets treated differently and we interpret
hypercalls. For bisectability sake, add the flag now, but only enable it when
all the support code is there.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      9432ba60
    • A
      KVM: PPC: move compute_tlbie_rb to book3s common header · db507c30
      由 Alexander Graf 提交于 
      We need the compute_tlbie_rb in _pr and _hv implementations for papr
soon, so let's move it over to a common header file that both
implementations can leverage.
Signed-off-by: NAlexander Graf <agraf@suse.de>
      db507c30
  3. 31 8月, 2011 3 次提交
  5. 30 8月, 2011 1 次提交
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  15. 27 7月, 2011 4 次提交