Commit Graph

361632 Commits

Author SHA1 Message Date
Abel Gordon
abc4fc58c5 KVM: nVMX: Detect shadow-vmcs capability
Add logic required to detect if shadow-vmcs is supported by the
processor. Introduce a new kernel module parameter to specify if L0 should use
shadow vmcs (or not) to run L1.

Signed-off-by: Abel Gordon <abelg@il.ibm.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-22 10:51:21 +03:00
Abel Gordon
89662e566c KVM: nVMX: Shadow-vmcs control fields/bits
Add definitions for all the vmcs control fields/bits
required to enable vmcs-shadowing

Signed-off-by: Abel Gordon <abelg@il.ibm.com>
Reviewed-by: Orit Wasserman <owasserm@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-22 10:51:09 +03:00
Gleb Natapov
d10ab869ae Merge git://github.com/agraf/linux-2.6.git kvm-ppc-next into queue 2013-04-22 10:38:15 +03:00
Yang Zhang
e606264797 KVM: ia64: Fix kvm_vm_ioctl_irq_line
Fix the compile error with kvm_vm_ioctl_irq_line.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-17 23:14:45 -03:00
Zhang, Yang Z
6ffbbbbab3 KVM: x86: Fix posted interrupt with CONFIG_SMP=n
->send_IPI_mask is not defined on UP.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-17 23:11:54 -03:00
Scott Wood
be28a27c99 kvm/ppc: don't call complete_mmio_load when it's a store
complete_mmio_load writes back the mmio result into the
destination register.  Doing this on a store results in
register corruption.

Signed-off-by: Scott Wood <scottwood@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-17 15:21:16 +02:00
Stuart Yoder
c32498ee64 KVM: PPC: emulate dcbst
Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-17 15:21:15 +02:00
Bharat Bhushan
8c32a2ea65 Added ONE_REG interface for debug instruction
This patch adds the one_reg interface to get the special instruction
to be used for setting software breakpoint from userspace.

Signed-off-by: Bharat Bhushan <bharat.bhushan@freescale.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
2013-04-17 15:21:14 +02:00
Alexander Graf
fca7567c30 Merge commit 'origin/next' into kvm-ppc-next 2013-04-17 15:20:38 +02:00
Gleb Natapov
f13882d84d KVM: VMX: Fix check guest state validity if a guest is in VM86 mode
If guest vcpu is in VM86 mode the vcpu state should be checked as if in
real mode.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 18:34:19 -03:00
Paolo Bonzini
26539bd0e4 KVM: nVMX: check vmcs12 for valid activity state
KVM does not use the activity state VMCS field, and does not support
it in nested VMX either (the corresponding bits in the misc VMX feature
MSR are zero).  Fail entry if the activity state is set to anything but
"active".

Since the value will always be the same for L1 and L2, we do not need
to read and write the corresponding VMCS field on L1/L2 transitions,
either.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 18:22:14 -03:00
Alexander Graf
79558f112f KVM: ARM: Fix kvm_vm_ioctl_irq_line
Commit aa2fbe6d broke the ARM KVM target by introducing a new parameter
to irq handling functions.

Fix the function prototype to get things compiling again and ignore the
parameter just like we did before

Signed-off-by: Alexander Graf <agraf@suse.de>
Acked-by: Christoffer Dall <cdall@cs.columbia.edu>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 18:16:10 -03:00
Yang Zhang
5a71785dde KVM: VMX: Use posted interrupt to deliver virtual interrupt
If posted interrupt is avaliable, then uses it to inject virtual
interrupt to guest.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 16:32:41 -03:00
Yang Zhang
a20ed54d6e KVM: VMX: Add the deliver posted interrupt algorithm
Only deliver the posted interrupt when target vcpu is running
and there is no previous interrupt pending in pir.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 16:32:40 -03:00
Yang Zhang
cf9e65b773 KVM: Set TMR when programming ioapic entry
We already know the trigger mode of a given interrupt when programming
the ioapice entry. So it's not necessary to set it in each interrupt
delivery.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 16:32:40 -03:00
Yang Zhang
3d81bc7e96 KVM: Call common update function when ioapic entry changed.
Both TMR and EOI exit bitmap need to be updated when ioapic changed
or vcpu's id/ldr/dfr changed. So use common function instead eoi exit
bitmap specific function.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 16:32:40 -03:00
Yang Zhang
01e439be77 KVM: VMX: Check the posted interrupt capability
Detect the posted interrupt feature. If it exists, then set it in vmcs_config.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 16:32:40 -03:00
Yang Zhang
d78f266483 KVM: VMX: Register a new IPI for posted interrupt
Posted Interrupt feature requires a special IPI to deliver posted interrupt
to guest. And it should has a high priority so the interrupt will not be
blocked by others.
Normally, the posted interrupt will be consumed by vcpu if target vcpu is
running and transparent to OS. But in some cases, the interrupt will arrive
when target vcpu is scheduled out. And host will see it. So we need to
register a dump handler to handle it.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 16:32:39 -03:00
Yang Zhang
a547c6db4d KVM: VMX: Enable acknowledge interupt on vmexit
The "acknowledge interrupt on exit" feature controls processor behavior
for external interrupt acknowledgement. When this control is set, the
processor acknowledges the interrupt controller to acquire the
interrupt vector on VM exit.

After enabling this feature, an interrupt which arrived when target cpu is
running in vmx non-root mode will be handled by vmx handler instead of handler
in idt. Currently, vmx handler only fakes an interrupt stack and jump to idt
table to let real handler to handle it. Further, we will recognize the interrupt
and only delivery the interrupt which not belong to current vcpu through idt table.
The interrupt which belonged to current vcpu will be handled inside vmx handler.
This will reduce the interrupt handle cost of KVM.

Also, interrupt enable logic is changed if this feature is turnning on:
Before this patch, hypervior call local_irq_enable() to enable it directly.
Now IF bit is set on interrupt stack frame, and will be enabled on a return from
interrupt handler if exterrupt interrupt exists. If no external interrupt, still
call local_irq_enable() to enable it.

Refer to Intel SDM volum 3, chapter 33.2.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-16 16:32:39 -03:00
Yang Zhang
2c2bf01136 KVM: Use eoi to track RTC interrupt delivery status
Current interrupt coalescing logci which only used by RTC has conflict
with Posted Interrupt.
This patch introduces a new mechinism to use eoi to track interrupt:
When delivering an interrupt to vcpu, the pending_eoi set to number of
vcpu that received the interrupt. And decrease it when each vcpu writing
eoi. No subsequent RTC interrupt can deliver to vcpu until all vcpus
write eoi.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-15 23:20:35 -03:00
Yang Zhang
aa2fbe6d44 KVM: Let ioapic know the irq line status
Userspace may deliver RTC interrupt without query the status. So we
want to track RTC EOI for this case.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-15 23:20:34 -03:00
Yang Zhang
f3bff6318f KVM: Force vmexit with virtual interrupt delivery
Need the EOI to track interrupt deliver status, so force vmexit
on EOI for rtc interrupt when enabling virtual interrupt delivery.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-15 23:20:34 -03:00
Yang Zhang
106069193c KVM: Add reset/restore rtc_status support
restore rtc_status from migration or save/restore

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-15 23:20:34 -03:00
Yang Zhang
b4f2225c07 KVM: Return destination vcpu on interrupt injection
Add a new parameter to know vcpus who received the interrupt.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-15 23:20:34 -03:00
Yang Zhang
8dc6aade5b KVM: Introduce struct rtc_status
rtc_status is used to track RTC interrupt delivery status. The pending_eoi
will be increased by vcpu who received RTC interrupt and will be decreased
when EOI to this interrupt.
Also, we use dest_map to record the destination vcpu to avoid the case that
vcpu who didn't get the RTC interupt, but issued EOI with same vector of RTC
and descreased pending_eoi by mistake.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-15 23:20:33 -03:00
Yang Zhang
1fcc7890db KVM: Add vcpu info to ioapic_update_eoi()
Add vcpu info to ioapic_update_eoi, so we can know which vcpu
issued this EOI.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2013-04-15 23:20:33 -03:00
Jan Kiszka
c0d1c770c0 KVM: nVMX: Avoid reading VM_EXIT_INTR_ERROR_CODE needlessly on nested exits
We only need to update vm_exit_intr_error_code if there is a valid exit
interruption information and it comes with a valid error code.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-14 18:27:10 +03:00
Jan Kiszka
e8457c67a4 KVM: nVMX: Fix conditions for interrupt injection
If we are entering guest mode, we do not want L0 to interrupt this
vmentry with all its side effects on the vmcs. Therefore, injection
shall be disallowed during L1->L2 transitions, as in the previous
version. However, this check is conceptually independent of
nested_exit_on_intr, so decouple it.

If L1 traps external interrupts, we can kick the guest from L2 to L1,
also just like the previous code worked. But we no longer need to
consider L1's idt_vectoring_info_field. It will always be empty at this
point. Instead, if L2 has pending events, those are now found in the
architectural queues and will, thus, prevent vmx_interrupt_allowed from
being called at all.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-14 18:27:09 +03:00
Jan Kiszka
5f3d579997 KVM: nVMX: Rework event injection and recovery
The basic idea is to always transfer the pending event injection on
vmexit into the architectural state of the VCPU and then drop it from
there if it turns out that we left L2 to enter L1, i.e. if we enter
prepare_vmcs12.

vmcs12_save_pending_events takes care to transfer pending L0 events into
the queue of L1. That is mandatory as L1 may decide to switch the guest
state completely, invalidating or preserving the pending events for
later injection (including on a different node, once we support
migration).

This concept is based on the rule that a pending vmlaunch/vmresume is
not canceled. Otherwise, we would risk to lose injected events or leak
them into the wrong queues. Encode this rule via a WARN_ON_ONCE at the
entry of nested_vmx_vmexit.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-14 18:27:07 +03:00
Jan Kiszka
3b656cf764 KVM: nVMX: Fix injection of PENDING_INTERRUPT and NMI_WINDOW exits to L1
Check if the interrupt or NMI window exit is for L1 by testing if it has
the corresponding controls enabled. This is required when we allow
direct injection from L0 to L2

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Reviewed-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-14 18:27:05 +03:00
Gleb Natapov
188424ba10 KVM: emulator: mark 0xff 0x7d opcode as undefined.
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-14 09:44:17 +03:00
Gleb Natapov
1146a78b8d KVM: emulator: Do not fail on emulation of undefined opcode
Emulation of undefined opcode should inject #UD instead of causing
emulation failure. Do that by moving Undefined flag check to emulation
stage and injection #UD there.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-14 09:44:17 +03:00
Gleb Natapov
991eebf9f8 KVM: VMX: do not try to reexecute failed instruction while emulating invalid guest state
During invalid guest state emulation vcpu cannot enter guest mode to try
to reexecute instruction that emulator failed to emulate, so emulation
will happen again and again.  Prevent that by telling the emulator that
instruction reexecution should not be attempted.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-14 09:44:17 +03:00
Gleb Natapov
0b789eee2c KVM: emulator: fix unimplemented instruction detection
Unimplemented instruction detection is broken for group instructions
since it relies on "flags" field of opcode to be zero, but all
instructions in a group inherit flags from a group encoding. Fix that by
having a separate flag for unimplemented instructions.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-14 09:44:16 +03:00
Kevin Wolf
f8da94e9e4 KVM: x86 emulator: Fix segment loading in VM86
This fixes a regression introduced in commit 03ebebeb1 ("KVM: x86
emulator: Leave segment limit and attributs alone in real mode").

The mentioned commit changed the segment descriptors for both real mode
and VM86 to only update the segment base instead of creating a
completely new descriptor with limit 0xffff so that unreal mode keeps
working across a segment register reload.

This leads to an invalid segment descriptor in the eyes of VMX, which
seems to be okay for real mode because KVM will fix it up before the
next VM entry or emulate the state, but it doesn't do this if the guest
is in VM86, so we end up with:

  KVM: entry failed, hardware error 0x80000021

Fix this by effectively reverting commit 03ebebeb1 for VM86 and leaving
it only in place for real mode, which is where it's really needed.

Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-11 15:53:06 +03:00
Geoff Levand
8b415dcd76 KVM: Move kvm_rebooting declaration out of x86
The variable kvm_rebooting is a common kvm variable, so move its
declaration from arch/x86/include/asm/kvm_host.h to
include/asm/kvm_host.h.

Fixes this sparse warning when building on arm64:

  virt/kvm/kvm_main.c⚠️ symbol 'kvm_rebooting' was not declared. Should it be static?

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-08 13:02:09 +03:00
Geoff Levand
e3ba45b804 KVM: Move kvm_spurious_fault to x86.c
The routine kvm_spurious_fault() is an x86 specific routine, so
move it from virt/kvm/kvm_main.c to arch/x86/kvm/x86.c.

Fixes this sparse warning when building on arm64:

  virt/kvm/kvm_main.c⚠️ symbol 'kvm_spurious_fault' was not declared. Should it be static?

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-08 13:02:06 +03:00
Geoff Levand
39369f7a8b KVM: Make local routines static
The routines get_user_page_nowait(), kvm_io_bus_sort_cmp(), kvm_io_bus_insert_dev()
and kvm_io_bus_get_first_dev() are only referenced within kvm_main.c, so give them
static linkage.

Fixes sparse warnings like these:

  virt/kvm/kvm_main.c: warning: symbol 'get_user_page_nowait' was not declared. Should it be static?

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-08 13:02:04 +03:00
Geoff Levand
fc1b74925f KVM: Move vm_list kvm_lock declarations out of x86
The variables vm_list and kvm_lock are common to all architectures, so
move the declarations from arch/x86/include/asm/kvm_host.h to
include/linux/kvm_host.h.

Fixes sparse warnings like these when building for arm64:

  virt/kvm/kvm_main.c: warning: symbol 'kvm_lock' was not declared. Should it be static?
  virt/kvm/kvm_main.c: warning: symbol 'vm_list' was not declared. Should it be static?

Signed-off-by: Geoff Levand <geoff@infradead.org>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-08 13:02:00 +03:00
Jan Kiszka
a63cb56061 KVM: VMX: Add missing braces to avoid redundant error check
The code was already properly aligned, now also add the braces to avoid
that err is checked even if alloc_apic_access_page didn't run and change
it. Found via Coccinelle by Fengguang Wu.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-08 12:46:06 +03:00
Yang Zhang
458f212e36 KVM: x86: fix memory leak in vmx_init
Free vmx_msr_bitmap_longmode_x2apic and vmx_msr_bitmap_longmode if
kvm_init() fails.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-08 10:56:08 +03:00
Michael S. Tsirkin
05e07f9bdb kvm: fix MMIO/PIO collision misdetection
PIO and MMIO are separate address spaces, but
ioeventfd registration code mistakenly detected
two eventfds as duplicate if they use the same address,
even if one is PIO and another one MMIO.

Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-07 14:53:47 +03:00
Jan Kiszka
b8c07d55d0 KVM: nVMX: Check exit control for VM_EXIT_SAVE_IA32_PAT, not entry controls
Obviously a copy&paste mistake: prepare_vmcs12 has to check L1's exit
controls for VM_EXIT_SAVE_IA32_PAT.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-07 14:06:42 +03:00
Yang Zhang
44944d4d28 KVM: Call kvm_apic_match_dest() to check destination vcpu
For a given vcpu, kvm_apic_match_dest() will tell you whether
the vcpu in the destination list quickly. Drop kvm_calculate_eoi_exitmap()
and use kvm_apic_match_dest() instead.

Signed-off-by: Yang Zhang <yang.z.zhang@Intel.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-07 13:55:49 +03:00
Cornelia Huck
99437a2782 KVM: s390: virtio_ccw: reset errors for new I/O.
ccw_io_helper neglected to reset vcdev->err after a new channel
program had been successfully started, resulting in stale errors
delivered after one I/O failed. Reset the error after a new
channel program has been successfully started with no old I/O
pending.

Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-07 13:13:47 +03:00
Takuya Yoshikawa
450e0b411f Revert "KVM: MMU: Move kvm_mmu_free_some_pages() into kvm_mmu_alloc_page()"
With the following commit, shadow pages can be zapped at random during
a shadow page talbe walk:
  KVM: MMU: Move kvm_mmu_free_some_pages() into kvm_mmu_alloc_page()
  7ddca7e43c

This patch reverts it and fixes __direct_map() and FNAME(fetch)().

Signed-off-by: Takuya Yoshikawa <yoshikawa_takuya_b1@lab.ntt.co.jp>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-07 13:13:36 +03:00
Paolo Bonzini
afd80d85ae pmu: prepare for migration support
In order to migrate the PMU state correctly, we need to restore the
values of MSR_CORE_PERF_GLOBAL_STATUS (a read-only register) and
MSR_CORE_PERF_GLOBAL_OVF_CTRL (which has side effects when written).
We also need to write the full 40-bit value of the performance counter,
which would only be possible with a v3 architectural PMU's full-width
counter MSRs.

To distinguish host-initiated writes from the guest's, pass the
full struct msr_data to kvm_pmu_set_msr.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-02 17:42:44 +03:00
Nick Wang
e1e2e605c2 KVM: s390: Enable KVM_CAP_NR_MEMSLOTS on s390
Return KVM_USER_MEM_SLOTS in kvm_dev_ioctl_check_extension().

Signed-off-by: Nick Wang <jfwang@us.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-02 16:14:53 +03:00
Nick Wang
dd2887e7c3 KVM: s390: Remove the sanity checks for kvm memory slot
To model the standby memory with memory_region_add_subregion
and friends, the guest would have one or more regions of ram.
Remove the check allowing only one memory slot and the check
requiring the real address of memory slot starts at zero.

Signed-off-by: Nick Wang <jfwang@us.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-02 16:14:51 +03:00
Nick Wang
3188bf6b80 KVM: s390: Change the virtual memory mapping location for virtio devices
The current location for mapping virtio devices does not take
into consideration the standby memory. This causes the failure
of mapping standby memory since the location for the mapping is
already taken by the virtio devices. To fix the problem, we move
the location to beyond the end of standby memory.

Signed-off-by: Nick Wang <jfwang@us.ibm.com>
Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
2013-04-02 16:14:49 +03:00