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Commit Graph

80798 Commits

Author SHA1 Message Date
Jan Kiszka
15b00f32d5 KVM: VMX: Force seg.base == (seg.sel << 4) in real mode
Ensure that segment.base == segment.selector << 4 when entering the real
mode on Intel so that the CPU will not bark at us.  This fixes some old
protected mode demo from http://www.x86.org/articles/pmbasics/tspec_a1_doc.htm.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:06 +02:00
Zhang Xiantao
54f1585a8d KVM: Portability: Move some function declarations to x86.h
Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:06 +02:00
Zhang Xiantao
ec6d273deb KVM: Move some static inline functions out from kvm.h into x86.h
Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:06 +02:00
Zhang Xiantao
2b3ccfa0c5 KVM: Portability: Move vcpu regs enumeration definition to x86.h
Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:05 +02:00
Zhang Xiantao
ea4a5ff80c KVM: Portability: Move struct kvm_x86_ops definition to x86.h
Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:05 +02:00
Zhang Xiantao
cd6e8f87ef KVM: Portability: Move some macro definitions from kvm.h to x86.h
Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:05 +02:00
Zhang Xiantao
56c6d28a9a KVM: Portability: MMU initialization and teardown split
Move out kvm_mmu init and exit functionality from kvm_main.c

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:05 +02:00
Zhang Xiantao
5bb064dcde KVM: Portability: Move kvm_vcpu_ioctl_get_dirty_log to arch-specific file
Meanwhile keep the interface in common, and leave as more logic in common
as possible.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:05 +02:00
Amit Shah
9327fd1195 KVM: Make unloading of FPU state when putting vcpu arch-independent
Instead of having each architecture do it individually, we
do this in the arch-independent code (just x86 as of now).

[avi: add svm to the mix, which was added to mainline during the
 2.6.24-rc process]

Signed-off-by: Amit Shah <amit.shah@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:05 +02:00
Avi Kivity
4cee576493 KVM: MMU: Add some mmu statistics
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:04 +02:00
Avi Kivity
ba1389b7a0 KVM: Extend stats support for VM stats
This is in addition to the current virtual cpu statistics.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:04 +02:00
Avi Kivity
f2b5756bb3 KVM: Add instruction emulation statistics 2008-01-30 17:53:04 +02:00
Avi Kivity
f096ed8588 KVM: Add fpu_reload counter
Measure the number of times we switch the fpu state.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:04 +02:00
Avi Kivity
e1beb1d37c KVM: Replace 'light_exits' stat with 'host_state_reload'
This is a little more accurate (since it counts actual reloads, not potential
reloads), and reverses the sense of the statistic to measure a bad event like
most of the other stats (e.g. we want to minimize all counters).

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:04 +02:00
Zhang Xiantao
d19a9cd275 KVM: Portability: Add two hooks to handle kvm_create and destroy vm
Add two arch hooks to handle kvm_create_vm and kvm destroy_vm. Now, just
put io_bus init and destory in common.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:04 +02:00
Zhang Xiantao
a16b043cc9 KVM: Remove __init attributes for kvm_init_debug and kvm_init_msr_list
Since their callers are not declared with __init.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:04 +02:00
Joe Perches
56919c5c97 KVM: Remove ptr comparisons to 0
Fix sparse warnings "Using plain integer as NULL pointer"

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:03 +02:00
Zhang Xiantao
8b0067913d KVM: Portability: Make kvm_vcpu_ioctl_translate arch dependent
Move kvm_vcpu_ioctl_translate to arch, since mmu would be put under arch.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:03 +02:00
Avi Kivity
e08aa78ae5 KVM: VMX: Consolidate register usage in vmx_vcpu_run()
We pass vcpu, vmx->fail, and vmx->launched to assembly code, but all three
are fields within vmx.  Consolidate by only passing in vmx and offsets for
the rest.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:03 +02:00
Zhang Xiantao
018d00d2fe KVM: Portability: move KVM_CHECK_EXTENSION
Make KVM_CHECK_EXTENSION code into a function, all archs can define its
capability independently.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:03 +02:00
Sheng Yang
a7e6c88a78 KVM: x86 emulator: modify 'lods', and 'stos' not to depend on CR2
The current 'lods' and 'stos' is depending on incoming CR2 rather than decode
memory address from registers.

Signed-off-by: Sheng Yang <sheng.yang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:03 +02:00
Zhang Xiantao
f8c16bbaa9 KVM: Portability: Move x86 specific code from kvm_init() to kvm_arch()
Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:03 +02:00
Zhang Xiantao
cb498ea2ce KVM: Portability: Combine kvm_init and kvm_init_x86
Will be called once arch module registers itself.

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:02 +02:00
Zhang Xiantao
e9b11c1755 KVM: Portability: Add vcpu and hardware management arch hooks
Add the following hooks:

  void decache_vcpus_on_cpu(int cpu);
  int kvm_arch_vcpu_init(struct kvm_vcpu *vcpu);
  void kvm_arch_vcpu_uninit(struct kvm_vcpu *vcpu);
  void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu);
  void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu);
  void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu);
  struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id);
  void kvm_arch_vcpu_destory(struct kvm_vcpu *vcpu);
  int kvm_arch_vcpu_reset(struct kvm_vcpu *vcpu);
  void kvm_arch_hardware_enable(void *garbage);
  void kvm_arch_hardware_disable(void *garbage);
  int kvm_arch_hardware_setup(void);
  void kvm_arch_hardware_unsetup(void);
  void kvm_arch_check_processor_compat(void *rtn);

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:02 +02:00
Zhang Xiantao
97896d04a1 KVM: Portability: Move kvm_x86_ops to x86.c
Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:02 +02:00
Zhang Xiantao
d825ed0a97 KVM: Portability: Move some includes to x86.c
Move some includes to x86.c from kvm_main.c, since the related functions
have been moved to x86.c

Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com>
Acked-by: Carsten Otte <cotte@de.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:02 +02:00
Izik Eidus
e0506bcba5 KVM: Change kvm_{read,write}_guest() to use copy_{from,to}_user()
This changes kvm_write_guest_page/kvm_read_guest_page to use
copy_to_user/read_from_user, as a result we get better speed
and better dirty bit tracking.

Signed-off-by: Izik Eidus <izike@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:02 +02:00
Izik Eidus
539cb6608c KVM: introduce gfn_to_hva()
Convert a guest frame number to the corresponding host virtual address.

Signed-off-by: Izik Eidus <izike@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:01 +02:00
Izik Eidus
f9d46eb0e4 KVM: add kvm_is_error_hva()
Check for the "error hva", an address outside the user address space that
signals a bad gfn.

Signed-off-by: Izik Eidus <izike@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:01 +02:00
Avi Kivity
1a6f4d7fbd KVM: Simplify CPU_TASKS_FROZEN cpu notifier handling
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:01 +02:00
Izik Eidus
906e608b05 KVM: x86 emulator: remove 8 bytes operands emulator for call near instruction
it is removed beacuse it isnt supported on a real host

Signed-off-by: Izik Eidus <izike@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:01 +02:00
Eddie Dong
e5edaa01c4 KVM: VMX: wbinvd exiting
Add wbinvd VM Exit support to prepare for pass-through
device cache emulation and also enhance real time
responsiveness.

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:01 +02:00
Eddie Dong
8a70cc3d0f KVM: VMX: Comment VMX primary/secondary exec ctl definitions
Add comments for secondary/primary Processor-Based VM-execution controls.

Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:01 +02:00
Avi Kivity
9c8cba3761 KVM: Fix faults during injection of real-mode interrupts
If vmx fails to inject a real-mode interrupt while fetching the interrupt
redirection table, it fails to record this in the vectoring information
field.  So we detect this condition and do it ourselves.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:01 +02:00
Avi Kivity
1155f76a81 KVM: VMX: Read & store IDT_VECTORING_INFO_FIELD
We'll want to write to it in order to fix real-mode irq injection problems,
but it is a read-only field.  Storing it in a variable solves that issue.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:00 +02:00
Avi Kivity
9c5623e3e4 KVM: VMX: Use vmx to inject real-mode interrupts
Instead of injecting real-mode interrupts by writing the interrupt frame into
guest memory, abuse vmx by injecting a software interrupt.  We need to
pretend the software interrupt instruction had a length > 0, so we have to
adjust rip backward.

This lets us not to mess with writing guest memory, which is complex and also
sleeps.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:00 +02:00
Dor Laor
12264760e4 KVM: Add make_page_dirty() to kvm_clear_guest_page()
Every write access to guest pages should be tracked.

Signed-off-by: Dor Laor <dor.laor@qumranet.com>
Signed-off-by: Izik Eidus <izike@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:00 +02:00
Hollis Blanchard
b6c7a5dccf KVM: Portability: Move x86 vcpu ioctl handlers to x86.c
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:00 +02:00
Hollis Blanchard
d075206073 KVM: Portability: Move x86 FPU handling to x86.c
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:00 +02:00
Hollis Blanchard
8776e5194f KVM: Portability: Move x86 instruction emulation code to x86.c
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:53:00 +02:00
Hollis Blanchard
417bc3041f KVM: Portability: Make exported debugfs data architecture-specific
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:59 +02:00
Avi Kivity
1c73ef6650 KVM: x86 emulator: Hoist modrm and abs decoding into separate functions
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:59 +02:00
Uri Lublin
3b6fff198c KVM: Make mark_page_dirty() work for aliased pages too.
Recommended by Izik Eidus.

Signed-off-by: Uri Lublin <uril@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:59 +02:00
Avi Kivity
9f1ef3f8f5 KVM: Simplify decode_register_operand() calling convention
Now that rex_prefix is part of the decode cache, there is no need to pass
it along.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:59 +02:00
Avi Kivity
33615aa956 KVM: x86 emulator: centralize decoding of one-byte register access insns
Instructions like 'inc reg' that have the register operand encoded
in the opcode are currently specially decoded.  Extend
decode_register_operand() to handle that case, indicated by having
DstReg or SrcReg without ModRM.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:59 +02:00
Avi Kivity
3c118e24af KVM: x86 emulator: Extract the common code of SrcReg and DstReg
Share the common parts of SrcReg and DstReg decoding.

Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:59 +02:00
Carsten Otte
de7d789acd KVM: Portability: Move pio emulation functions to x86.c
This patch moves implementation of the following functions from
kvm_main.c to x86.c:
free_pio_guest_pages, vcpu_find_pio_dev, pio_copy_data, complete_pio,
kernel_pio, pio_string_write, kvm_emulate_pio, kvm_emulate_pio_string

The function inject_gp, which was duplicated by yesterday's patch
series, is removed from kvm_main.c now because it is not needed anymore.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Acked-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:59 +02:00
Carsten Otte
bbd9b64e37 KVM: Portability: Move x86 emulation and mmio device hook to x86.c
This patch moves the following functions to from kvm_main.c to x86.c:
emulator_read/write_std, vcpu_find_pervcpu_dev, vcpu_find_mmio_dev,
emulator_read/write_emulated, emulator_write_phys,
emulator_write_emulated_onepage, emulator_cmpxchg_emulated,
get_setment_base, emulate_invlpg, emulate_clts, emulator_get/set_dr,
kvm_report_emulation_failure, emulate_instruction

The following data type is moved to x86.c:
struct x86_emulate_ops emulate_ops

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Acked-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:58 +02:00
Carsten Otte
15c4a6406f KVM: Portability: Move kvm_get/set_msr[_common] to x86.c
This patch moves the implementation of the functions of kvm_get/set_msr,
kvm_get/set_msr_common, and set_efer from kvm_main.c to x86.c. The
definition of EFER_RESERVED_BITS is moved too.

Signed-off-by: Carsten Otte <cotte@de.ibm.com>
Acked-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:58 +02:00
Anthony Liguori
aab61cc0d2 KVM: Fix gfn_to_page() acquiring mmap_sem twice
KVM's nopage handler calls gfn_to_page() which acquires the mmap_sem when
calling out to get_user_pages().  nopage handlers are already invoked with the
mmap_sem held though.  Introduce a __gfn_to_page() for use by the nopage
handler which requires the lock to already be held.

This was noticed by tglx.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30 17:52:58 +02:00