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2008-01-30KVM: Portability: Add vcpu and hardware management arch hooksZhang Xiantao
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>
2008-01-30KVM: Portability: Move kvm_x86_ops to x86.cZhang Xiantao
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>
2008-01-30KVM: Portability: Move some includes to x86.cZhang Xiantao
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>
2008-01-30KVM: Change kvm_{read,write}_guest() to use copy_{from,to}_user()Izik Eidus
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>
2008-01-30KVM: introduce gfn_to_hva()Izik Eidus
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>
2008-01-30KVM: add kvm_is_error_hva()Izik Eidus
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>
2008-01-30KVM: Simplify CPU_TASKS_FROZEN cpu notifier handlingAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: x86 emulator: remove 8 bytes operands emulator for call near instructionIzik Eidus
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>
2008-01-30KVM: VMX: wbinvd exitingEddie Dong
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>
2008-01-30KVM: VMX: Comment VMX primary/secondary exec ctl definitionsEddie Dong
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>
2008-01-30KVM: Fix faults during injection of real-mode interruptsAvi Kivity
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>
2008-01-30KVM: VMX: Read & store IDT_VECTORING_INFO_FIELDAvi Kivity
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>
2008-01-30KVM: VMX: Use vmx to inject real-mode interruptsAvi Kivity
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>
2008-01-30KVM: Add make_page_dirty() to kvm_clear_guest_page()Dor Laor
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>
2008-01-30KVM: Portability: Move x86 vcpu ioctl handlers to x86.cHollis Blanchard
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: Move x86 FPU handling to x86.cHollis Blanchard
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: Move x86 instruction emulation code to x86.cHollis Blanchard
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: Make exported debugfs data architecture-specificHollis Blanchard
Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: x86 emulator: Hoist modrm and abs decoding into separate functionsAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Make mark_page_dirty() work for aliased pages too.Uri Lublin
Recommended by Izik Eidus. Signed-off-by: Uri Lublin <uril@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Simplify decode_register_operand() calling conventionAvi Kivity
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>
2008-01-30KVM: x86 emulator: centralize decoding of one-byte register access insnsAvi Kivity
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>
2008-01-30KVM: x86 emulator: Extract the common code of SrcReg and DstRegAvi Kivity
Share the common parts of SrcReg and DstReg decoding. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: Move pio emulation functions to x86.cCarsten Otte
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>
2008-01-30KVM: Portability: Move x86 emulation and mmio device hook to x86.cCarsten Otte
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>
2008-01-30KVM: Portability: Move kvm_get/set_msr[_common] to x86.cCarsten Otte
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>
2008-01-30KVM: Fix gfn_to_page() acquiring mmap_sem twiceAnthony Liguori
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>
2008-01-30KVM: VMX: Enable memory mapped TPR shadow (FlexPriority)Sheng Yang
This patch based on CR8/TPR patch, and enable the TPR shadow (FlexPriority) for 32bit Windows. Since TPR is accessed very frequently by 32bit Windows, especially SMP guest, with FlexPriority enabled, we saw significant performance gain. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: Move control register helper functions to x86.cCarsten Otte
This patch moves the definitions of CR0_RESERVED_BITS, CR4_RESERVED_BITS, and CR8_RESERVED_BITS along with the following functions from kvm_main.c to x86.c: set_cr0(), set_cr3(), set_cr4(), set_cr8(), get_cr8(), lmsw(), load_pdptrs() The static function wrapper inject_gp is duplicated in kvm_main.c and x86.c for now, the version in kvm_main.c should disappear once the last user of it is gone too. The function load_pdptrs is no longer static, and now defined in x86.h for the time being, until the last user of it is gone from kvm_main.c. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: move get/set_apic_base to x86.cCarsten Otte
This patch moves the implementation of get_apic_base and set_apic_base from kvm_main.c to x86.c Signed-off-by: Carsten Otte <cotte@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: Move memory segmentation to x86.cCarsten Otte
This patch moves the definition of segment_descriptor_64 for AMD64 and EM64T from kvm_main.c to segment_descriptor.h. It also adds a proper #ifndef...#define...#endif around that header file. The implementation of segment_base is moved from kvm_main.c to x86.c. Signed-off-by: Carsten Otte <cotte@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: Split kvm_vm_ioctl v3Carsten Otte
This patch splits kvm_vm_ioctl into archtecture independent parts, and x86 specific parts which go to kvm_arch_vcpu_ioctl in x86.c. The patch is unchanged since last submission. Common ioctls for all architectures are: KVM_CREATE_VCPU, KVM_GET_DIRTY_LOG, KVM_SET_USER_MEMORY_REGION x86 specific ioctls are: KVM_SET_MEMORY_REGION, KVM_GET/SET_NR_MMU_PAGES, KVM_SET_MEMORY_ALIAS, KVM_CREATE_IRQCHIP, KVM_CREATE_IRQ_LINE, KVM_GET/SET_IRQCHIP KVM_SET_TSS_ADDR Signed-off-by: Carsten Otte <cotte@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: MMU: Topup the mmu memory preallocation caches before emulating an insnAvi Kivity
Emulation may cause a shadow pte to be instantiated, which requires memory resources. Make sure the caches are filled to avoid an oops. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Move page fault processing to common codeAvi Kivity
The code that dispatches the page fault and emulates if we failed to map is duplicated across vmx and svm. Merge it to simplify further bugfixing. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: x86 emulator: don't depend on cr2 for mov abs emulationAvi Kivity
The 'mov abs' instruction family (opcodes 0xa0 - 0xa3) still depends on cr2 provided by the page fault handler. This is wrong for several reasons: - if an instruction accessed misaligned data that crosses a page boundary, and if the fault happened on the second page, cr2 will point at the second page, not the data itself. - if we're emulating in real mode, or due to a FlexPriority exit, there is no cr2 generated. So, this change adds decoding for this instruction form and drops reliance on cr2. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: SVM: Let gcc to choose which registers to save (i386)Laurent Vivier
This patch lets GCC to determine which registers to save when we switch to/from a VCPU in the case of AMD i386 * Original code saves following registers: ebx, ecx, edx, esi, edi, ebp * Patched code: - informs GCC that we modify following registers using the clobber description: ebx, ecx, edx, esi, edi - rbp is saved (pop/push) because GCC seems to ignore its use in the clobber description. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: SVM: Let gcc to choose which registers to save (x86_64)Laurent Vivier
This patch lets GCC to determine which registers to save when we switch to/from a VCPU in the case of AMD x86_64. * Original code saves following registers: rbx, rcx, rdx, rsi, rdi, rbp, r8, r9, r10, r11, r12, r13, r14, r15 * Patched code: - informs GCC that we modify following registers using the clobber description: rbx, rcx, rdx, rsi, rdi r8, r9, r10, r11, r12, r13, r14, r15 - rbp is saved (pop/push) because GCC seems to ignore its use in the clobber description. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: VMX: Let gcc to choose which registers to save (i386)Laurent Vivier
This patch lets GCC to determine which registers to save when we switch to/from a VCPU in the case of intel i386. * Original code saves following registers: eax, ebx, ecx, edx, edi, esi, ebp (using popa) * Patched code: - informs GCC that we modify following registers using the clobber description: ebx, edi, rsi - doesn't save eax because it is an output operand (vmx->fail) - cannot put ecx in clobber description because it is an input operand, but as we modify it and we want to keep its value (vcpu), we must save it (pop/push) - ebp is saved (pop/push) because GCC seems to ignore its use the clobber description. - edx is saved (pop/push) because it is reserved by GCC (REGPARM) and cannot be put in the clobber description. - line "mov (%%esp), %3 \n\t" has been removed because %3 is ecx and ecx is restored just after. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: VMX: Let gcc to choose which registers to save (x86_64)Laurent Vivier
This patch lets GCC to determine which registers to save when we switch to/from a VCPU in the case of intel x86_64. * Original code saves following registers: rax, rbx, rcx, rdx, rsi, rdi, rbp, r8, r9, r10, r11, r12, r13, r14, r15 * Patched code: - informs GCC that we modify following registers using the clobber description: rbx, rdi, rsi, r8, r9, r10, r11, r12, r13, r14, r15 - doesn't save rax because it is an output operand (vmx->fail) - cannot put rcx in clobber description because it is an input operand, but as we modify it and we want to keep its value (vcpu), we must save it (pop/push) - rbp is saved (pop/push) because GCC seems to ignore its use in the clobber description. - rdx is saved (pop/push) because it is reserved by GCC (REGPARM) and cannot be put in the clobber description. - line "mov (%%rsp), %3 \n\t" has been removed because %3 is rcx and rcx is restored just after. - line ASM_VMX_VMWRITE_RSP_RDX() is moved out of the ifdef/else/endif Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Add ioctl to tss address from userspace,Izik Eidus
Currently kvm has a wart in that it requires three extra pages for use as a tss when emulating real mode on Intel. This patch moves the allocation internally, only requiring userspace to tell us where in the physical address space we can place the tss. Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Add kernel-internal memory slotsIzik Eidus
Reserve a few memory slots for kernel internal use. This is good for case you have to register memory region and you want to be sure it was not registered from userspace, and for case you want to register a memory region that won't be seen from userspace. Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Export memory slot allocation mechanismIzik Eidus
Remove kvm memory slot allocation mechanism from the ioctl and put it to exported function. Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Unmap kernel-allocated memory on slot destructionIzik Eidus
kvm_vm_ioctl_set_memory_region() is able to remove memory in addition to adding it. Therefore when using kernel swapping support for old userspaces, we need to munmap the memory if the user request to remove it Signed-off-by: Izik Eidus <izike@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Split IOAPIC reset function and export for kernel RESETEddie Dong
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Export PIC reset for kernel device resetEddie Dong
Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Add a might_sleep() annotation to gfn_to_page()Avi Kivity
This will help trap accesses to guest memory in atomic context. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Move vmx_vcpu_reset() out of vmx_vcpu_setup()Avi Kivity
Split guest reset code out of vmx_vcpu_setup(). Besides being cleaner, this moves the realmode tss setup (which can sleep) outside vmx_vcpu_setup() (which is executed with preemption enabled). [izik: remove unused variable] Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Portability: Split kvm_vcpu into arch dependent and independent parts ↵Zhang Xiantao
(part 1) First step to split kvm_vcpu. Currently, we just use an macro to define the common fields in kvm_vcpu for all archs, and all archs need to define its own kvm_vcpu struct. Signed-off-by: Zhang Xiantao <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Allocate userspace memory for older userspaceAnthony Liguori
Allocate a userspace buffer for older userspaces. Also eliminate phys_mem buffer. The memset() in kvmctl really kills initial memory usage but swapping works even with old userspaces. A side effect is that maximum guest side is reduced for older userspace on i386. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-01-30KVM: Use virtual cpu accounting if available for guest times.Christian Borntraeger
ppc and s390 offer the possibility to track process times precisely by looking at cpu timer on every context switch, irq, softirq etc. We can use that infrastructure as well for guest time accounting. We need to account the used time before we change the state. This patch adds a call to account_system_vtime to kvm_guest_enter and kvm_guest exit. If CONFIG_VIRT_CPU_ACCOUNTING is not set, account_system_vtime is defined in hardirq.h as an empty function, which means this patch does not change the behaviour on other platforms. I compile tested this patch on x86 and function tested the patch on s390. Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
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