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2011-05-22KVM: Add CPUID support for VIA CPUBrillyWu@viatech.com.cn
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: Brilly Wu <brillywu@viatech.com.cn> Signed-off-by: Kary Jin <karyjin@viatech.com.cn> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: call cache_all_regs() only once during instruction emulationGleb Natapov
Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: Fix compound mmioGleb Natapov
mmio_index should be taken into account when copying data from userspace. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: emulator: Propagate fault in far jump emulationGleb Natapov
Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: mmio_fault_cr2 is not usedGleb Natapov
Remove unused variable mmio_fault_cr2. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: consolidate group handlingAvi Kivity
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: Avi Kivity <avi@redhat.com>
2011-05-22KVM: MMU: Add unlikely() annotations to walk_addr_generic()Avi Kivity
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: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: Use opcode::execute for PUSHF/POPF (9C/9D)Takuya Yoshikawa
For this, em_pushf/popf() are introduced. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: Use opcode::execute for PUSHA/POPA (60/61)Takuya Yoshikawa
For this, emulate_pusha/popa() are converted to em_pusha/popa(). Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: Use opcode::execute for POP reg (58-5F)Takuya Yoshikawa
In addition, the RET emulation is changed to call em_pop() to remove the pop_instruction label. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: Use opcode::execute for Group 1, CMPS and SCASTakuya Yoshikawa
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: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: MMU: Optimize guest page table walkTakuya Yoshikawa
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: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: SVM: Get rid of x86_intercept_map::validAvi Kivity
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: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: Use opcode::execute for 0F 01 opcodeAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: Don't force #UD for 0F 01 /5Avi Kivity
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: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: move 0F 01 sub-opcodes into their own functionsAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: fix const value warning on i386 in svm insn RAX checkRandy Dunlap
arch/x86/kvm/emulate.c:2598: warning: integer constant is too large for 'long' type Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: avoid calling wbinvd() macroClemens Noss
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: Clemens Noss <cnoss@gmx.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: MMU: Make cmpxchg_gpte aware of nesting tooRoedel, Joerg
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: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: drop x86_emulate_ctxt::vcpuAvi Kivity
No longer used. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: Avoid using x86_emulate_ctxt.vcpuAvi Kivity
We can use container_of() instead. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: add new ->wbinvd() callbackAvi Kivity
Instead of calling kvm_emulate_wbinvd() directly. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: add ->fix_hypercall() callbackAvi Kivity
Artificial, but needed to remove direct calls to KVM. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: add new ->halt() callbackAvi Kivity
Instead of reaching into vcpu internals. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: make emulate_invlpg() an emulator callbackAvi Kivity
Removing direct calls to KVM. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: emulate CLTS internallyAvi Kivity
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: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: Replace calls to is_pae() and is_paging with ->get_cr()Avi Kivity
Avoid use of ctxt->vcpu. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: drop use of is_long_mode()Avi Kivity
Requires ctxt->vcpu, which is to be abolished. Replace with open calls to get_msr(). Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: add and use new callbacks set_idt(), set_gdt()Avi Kivity
Replacing direct calls to realmode_lgdt(), realmode_lidt(). Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: avoid using ctxt->vcpu in check_perm() callbacksAvi Kivity
Unneeded for register access. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: drop vcpu argument from intercept callbackAvi Kivity
Making the emulator caller agnostic. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: drop vcpu argument from cr/dr/cpl/msr callbacksAvi Kivity
Making the emulator caller agnostic. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-22KVM: x86 emulator: drop vcpu argument from segment/gdt/idt callbacksAvi Kivity
Making the emulator caller agnostic. [Takuya Yoshikawa: fix typo leading to LDT failures] Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: x86 emulator: drop vcpu argument from pio callbacksAvi Kivity
Making the emulator caller agnostic. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: x86 emulator: drop vcpu argument from memory read/write callbacksAvi Kivity
Making the emulator caller agnostic. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: x86 emulator: whitespace cleanupsAvi Kivity
Clean up lines longer than 80 columns. No code changes. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: emulator: Use linearize() when fetching instructionsNelson Elhage
Since segments need to be handled slightly differently when fetching instructions, we add a __linearize helper that accepts a new 'fetch' boolean. [avi: fix oops caused by wrong segmented_address initialization order] Signed-off-by: Nelson Elhage <nelhage@ksplice.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: X86: Update last_guest_tsc in vcpu_putJoerg Roedel
The last_guest_tsc is used in vcpu_load to adjust the tsc_offset since tsc-scaling is merged. So the last_guest_tsc needs to be updated in vcpu_put instead of the the last_host_tsc. This is fixed with this patch. Reported-by: Jan Kiszka <jan.kiszka@web.de> Tested-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: SVM: Fix nested sel_cr0 intercept path with decode-assistsJoerg Roedel
This patch fixes a bug in the nested-svm path when decode-assists is available on the machine. After a selective-cr0 intercept is detected the rip is advanced unconditionally. This causes the l1-guest to continue running with an l2-rip. This bug was with the sel_cr0 unit-test on decode-assists capable hardware. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: x86 emulator: Handle wraparound in (cs_base + offset) when fetching insnsNelson Elhage
Currently, setting a large (i.e. negative) base address for %cs does not work on a 64-bit host. The "JOS" teaching operating system, used by MIT and other universities, relies on such segments while bootstrapping its way to full virtual memory management. Signed-off-by: Nelson Elhage <nelhage@ksplice.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: remove useless function declaration kvm_inject_pit_timer_irqs()Duan Jiong
Just remove useless function define kvm_inject_pit_timer_irqs() from file arch/x86/kvm/i8254.h Signed-off-by:Duan Jiong<djduanjiong@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: remove useless function declarations from file arch/x86/kvm/irq.hDuan Jiong
Just remove useless function define kvm_pic_clear_isr_ack() and pit_has_pending_timer() Signed-off-by: Duan Jiong<djduanjiong@gmail.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: fix push of wrong eip when doing softintSerge E. Hallyn
When doing a soft int, we need to bump eip before pushing it to the stack. Otherwise we'll do the int a second time. [apw@canonical.com: merged eip update as per Jan's recommendation.] Signed-off-by: Serge E. Hallyn <serge.hallyn@ubuntu.com> Signed-off-by: Andy Whitcroft <apw@canonical.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: x86 emulator: Use em_push() instead of emulate_push()Takuya Yoshikawa
em_push() is a simple wrapper of emulate_push(). So this patch replaces emulate_push() with em_push() and removes the unnecessary former. In addition, the unused ops arguments are removed from emulate_pusha() and emulate_grp45(). Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: x86 emulator: Make emulate_push() store the value directlyTakuya Yoshikawa
PUSH emulation stores the value by calling writeback() after setting the dst operand appropriately in emulate_push(). This writeback() using dst is not needed at all because we know the target is the stack. So this patch makes emulate_push() call, newly introduced, segmented_write() directly. By this, many inlined writeback()'s are removed. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: x86 emulator: Disable writeback for CMP emulationTakuya Yoshikawa
This stops "CMP r/m, reg" to write back the data into memory. Pointed out by Avi. The writeback suppression now covers CMP, CMPS, SCAS. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: VMX: Ensure that vmx_create_vcpu always returns proper errorJan Kiszka
In case certain allocations fail, vmx_create_vcpu may return 0 as error instead of a negative value encoded via ERR_PTR. This causes a NULL pointer dereferencing later on in kvm_vm_ioctl_vcpu_create. Reported-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-05-11KVM: emulator: do not needlesly sync registers from emulator ctxt to vcpuGleb Natapov
Currently we sync registers back and forth before/after exiting to userspace for IO, but during IO device model shouldn't need to read/write the registers, so we can as well skip those sync points. The only exaception is broken vmware backdor interface. The new code sync registers content during IO only if registers are read from/written to by userspace in the middle of the IO operation and this almost never happens in practise. Signed-off-by: Gleb Natapov <gleb@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-05-11KVM: x86 emulator: implement segment permission checksAvi Kivity
Signed-off-by: Avi Kivity <avi@redhat.com>
2011-05-11KVM: x86 emulator: move desc_limit_scaled()Avi Kivity
For reuse later. Signed-off-by: Avi Kivity <avi@redhat.com>
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