Instead of separate accessors for the segment selector and cached descriptor,
use one accessor for both.  This simplifies the code somewhat.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Avoids a VMREAD.
Signed-off-by: NAvi Kivity <avi@redhat.com>

dump_vmcb isn't used outside this module, make it static.
Shrink text and object by ~1% by standardizing formats.

$ size arch/x86/kvm/svm.o*
   text	   data	    bss	    dec	    hex	filename
  52910	    580	  10072	  63562	   f84a	arch/x86/kvm/svm.o.new
  53563	    580	  10072	  64215	   fad7	arch/x86/kvm/svm.o.old
Signed-off-by: NJoe Perches <joe@perches.com>
Acked-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Fix regression introduced by
  commit e30d2a170506830d5eef5e9d7990c5aedf1b0a51
  KVM: MMU: Optimize guest page table walk

On x86_32, get_user() does not support 64-bit values and we fail to
build KVM at the point of 64-bit paging.

This patch fixes this by using get_user() twice for that condition.
Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Reported-by: NJan Kiszka <jan.kiszka@web.de>
Signed-off-by: NAvi Kivity <avi@redhat.com>

This patch fixes some sparse warning about "dubious one-bit signed bitfield."
Signed-off-by: NJeff Mahoney <jeffm@suse.com>
Originally-by: NJan Blunck <jblunck@suse.de>
Signed-off-by: NJan Blunck <jblunck@suse.de>
Acked-by: NXiantao Zhang <xiantao.zhang@intel.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

The CPUIDs for Centaur are added, and then the features of
PadLock hardware engine on VIA CPU, such as "ace", "ace_en"
and so on, can be passed into the kvm guest.
Signed-off-by: NBrilly Wu <brillywu@viatech.com.cn>
Signed-off-by: NKary Jin <karyjin@viatech.com.cn>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

mmio_index should be taken into account when copying data from
userspace.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Remove unused variable mmio_fault_cr2.
Signed-off-by: NGleb Natapov <gleb@redhat.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Move all groups into a single field and handle them in a single place.  This
saves bits when we add more group types (3 bits -> 7 groups types).
Signed-off-by: NAvi Kivity <avi@redhat.com>

walk_addr_generic() is a hot path and is also hard for the cpu to predict -
some of the parameters (fetch_fault in particular) vary wildly from
invocation to invocation.

Add unlikely() annotations where appropriate; all walk failures are
considered unlikely, as are cases where we have to mark the accessed or
dirty bit, as they are slow paths both in kvm and on real processors.
Signed-off-by: NAvi Kivity <avi@redhat.com>

For this, em_pushf/popf() are introduced.
Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: NAvi Kivity <avi@redhat.com>

For this, emulate_pusha/popa() are converted to em_pusha/popa().
Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: NAvi Kivity <avi@redhat.com>

In addition, the RET emulation is changed to call em_pop() to remove
the pop_instruction label.
Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: NAvi Kivity <avi@redhat.com>

The following instructions are changed to use opcode::execute.

Group 1 (80-83)
  ADD (00-05), OR (08-0D), ADC (10-15), SBB (18-1D), AND (20-25),
  SUB (28-2D), XOR (30-35), CMP (38-3D)

CMPS (A6-A7), SCAS (AE-AF)

The last two do the same as CMP in the emulator, so em_cmp() is used.
Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: NAvi Kivity <avi@redhat.com>

This patch optimizes the guest page table walk by using get_user()
instead of copy_from_user().

With this patch applied, paging64_walk_addr_generic() has become
about 0.5us to 1.0us faster on my Phenom II machine with NPT on.
Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: NAvi Kivity <avi@redhat.com>

By reserving 0 as an invalid x86_intercept_stage, we no longer
need to store a valid flag in x86_intercept_map.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Signed-off-by: NAvi Kivity <avi@redhat.com>

While it isn't defined, no need to force a #UD.  If it becomes defined
in the future this can cause wierd problems for the guest.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Signed-off-by: NAvi Kivity <avi@redhat.com>

arch/x86/kvm/emulate.c:2598: warning: integer constant is too large for 'long' type
Signed-off-by: NRandy Dunlap <randy.dunlap@oracle.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Commit 0b56652e33c72092956c651ab6ceb9f0ad081153 fails to build:

  CC [M]  arch/x86/kvm/emulate.o
arch/x86/kvm/emulate.c: In function 'x86_emulate_insn':
arch/x86/kvm/emulate.c:4095:25: error: macro "wbinvd" passed 1 arguments, but takes just 0
arch/x86/kvm/emulate.c:4095:3: warning: statement with no effect
make[2]: *** [arch/x86/kvm/emulate.o] Error 1
make[1]: *** [arch/x86/kvm] Error 2
make: *** [arch/x86] Error 2

Work around this for now.
Signed-off-by: NClemens Noss <cnoss@gmx.de>
Signed-off-by: NAvi Kivity <avi@redhat.com>

This patch makes the cmpxchg_gpte() function aware of the
difference between l1-gfns and l2-gfns when nested
virtualization is in use.  This fixes a potential
data-corruption problem in the l1-guest and makes the code
work correct (at least as correct as the hardware which is
emulated in this code) again.

Cc: stable@kernel.org
Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com>
Signed-off-by: NAvi Kivity <avi@redhat.com>

No longer used.
Signed-off-by: NAvi Kivity <avi@redhat.com>

We can use container_of() instead.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Instead of calling kvm_emulate_wbinvd() directly.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Artificial, but needed to remove direct calls to KVM.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Instead of reaching into vcpu internals.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Removing direct calls to KVM.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Avoid using ctxt->vcpu; we can do everything with ->get_cr() and ->set_cr().

A side effect is that we no longer activate the fpu on emulated CLTS; but that
should be very rare.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Avoid use of ctxt->vcpu.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Requires ctxt->vcpu, which is to be abolished.  Replace with open calls
to get_msr().
Signed-off-by: NAvi Kivity <avi@redhat.com>

Replacing direct calls to realmode_lgdt(), realmode_lidt().
Signed-off-by: NAvi Kivity <avi@redhat.com>

Unneeded for register access.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Making the emulator caller agnostic.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Making the emulator caller agnostic.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Making the emulator caller agnostic.

[Takuya Yoshikawa: fix typo leading to LDT failures]
Signed-off-by: NTakuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp>
Signed-off-by: NAvi Kivity <avi@redhat.com>

Making the emulator caller agnostic.
Signed-off-by: NAvi Kivity <avi@redhat.com>

Making the emulator caller agnostic.
Signed-off-by: NAvi Kivity <avi@redhat.com>