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2008-04-27KVM: add basic paravirt supportMarcelo Tosatti
Add basic KVM paravirt support. Avoid vm-exits on IO delays. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Add reset support for in kernel PITSheng Yang
Separate the reset part and prepare for reset support. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Add save/restore supporting of in kernel PITSheng Yang
Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: In kernel PIT modelSheng Yang
The patch moves the PIT model from userspace to kernel, and increases the timer accuracy greatly. [marcelo: make last_injected_time per-guest] Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Tested-and-Acked-by: Alex Davis <alex14641@yahoo.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Remove pointless desc_ptr #ifdefAvi Kivity
The desc_struct changes left an unnecessary #ifdef; remove it. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: VMX: Don't adjust tsc offset forwardAvi Kivity
Most Intel hosts have a stable tsc, and playing with the offset only reduces accuracy. By limiting tsc offset adjustment only to forward updates, we effectively disable tsc offset adjustment on these hosts. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: replace remaining __FUNCTION__ occurancesHarvey Harrison
__FUNCTION__ is gcc-specific, use __func__ Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: detect if VCPU triple faultsJoerg Roedel
In the current inject_page_fault path KVM only checks if there is another PF pending and injects a DF then. But it has to check for a pending DF too to detect a shutdown condition in the VCPU. If this is not detected the VCPU goes to a PF -> DF -> PF loop when it should triple fault. This patch detects this condition and handles it with an KVM_SHUTDOWN exit to userspace. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Use kzalloc to avoid allocating kvm_regs from kernel stackXiantao Zhang
Since the size of kvm_regs is too big to allocate from kernel stack on ia64, use kzalloc to allocate it. Signed-off-by: Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Prefix control register accessors with kvm_ to avoid namespace pollutionAvi Kivity
Names like 'set_cr3()' look dangerously close to affecting the host. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: MMU: large page supportMarcelo Tosatti
Create large pages mappings if the guest PTE's are marked as such and the underlying memory is hugetlbfs backed. If the largepage contains write-protected pages, a large pte is not used. Gives a consistent 2% improvement for data copies on ram mounted filesystem, without NPT/EPT. Anthony measures a 4% improvement on 4-way kernbench, with NPT. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: MMU: ignore zapped root pagetablesMarcelo Tosatti
Mark zapped root pagetables as invalid and ignore such pages during lookup. This is a problem with the cr3-target feature, where a zapped root table fools the faulting code into creating a read-only mapping. The result is a lockup if the instruction can't be emulated. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Cc: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Implement dummy values for MSR_PERF_STATUSAlexander Graf
Darwin relies on this and ceases to work without. Signed-off-by: Alexander Graf <alex@csgraf.de> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: sparse fixes for kvm/x86.cHarvey Harrison
In two case statements, use the ever popular 'i' instead of index: arch/x86/kvm/x86.c:1063:7: warning: symbol 'index' shadows an earlier one arch/x86/kvm/x86.c:1000:9: originally declared here arch/x86/kvm/x86.c:1079:7: warning: symbol 'index' shadows an earlier one arch/x86/kvm/x86.c:1000:9: originally declared here Make it static. arch/x86/kvm/x86.c:1945:24: warning: symbol 'emulate_ops' was not declared. Should it be static? Drop the return statements. arch/x86/kvm/x86.c:2878:2: warning: returning void-valued expression arch/x86/kvm/x86.c:2944:2: warning: returning void-valued expression Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: SVM: make iopm_base staticHarvey Harrison
Fixes sparse warning as well. arch/x86/kvm/svm.c:69:15: warning: symbol 'iopm_base' was not declared. Should it be static? Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: x86 emulator: fix sparse warnings in x86_emulate.cHarvey Harrison
Nesting __emulate_2op_nobyte inside__emulate_2op produces many shadowed variable warnings on the internal variable _tmp used by both macros. Change the outer macro to use __tmp. Avoids a sparse warning like the following at every call site of __emulate_2op arch/x86/kvm/x86_emulate.c:1091:3: warning: symbol '_tmp' shadows an earlier one arch/x86/kvm/x86_emulate.c:1091:3: originally declared here [18 more warnings suppressed] Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Add stat counter for hypercallsAmit Shah
Signed-off-by: Amit Shah <amit.shah@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Use x86's segment descriptor struct instead of private definitionAvi Kivity
The x86 desc_struct unification allows us to remove segment_descriptor.h. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Increase the number of user memory slots per vmAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Add API for determining the number of supported memory slotsAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Increase vcpu count to 16Avi Kivity
With NPT support, scalability is much improved. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Add API to retrieve the number of supported vcpus per vmAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: x86 emulator: make register_address_increment and JMP_REL static inlinesHarvey Harrison
Change jmp_rel() to a function as well. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: x86 emulator: make register_address, address_mask static inlinesHarvey Harrison
Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: x86 emulator: add ad_mask static inlineHarvey Harrison
Replaces open-coded mask calculation in macros. Signed-off-by: Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27x86: KVM guest: paravirtualized clocksourceGlauber de Oliveira Costa
This is the guest part of kvm clock implementation It does not do tsc-only timing, as tsc can have deltas between cpus, and it did not seem worthy to me to keep adjusting them. We do use it, however, for fine-grained adjustment. Other than that, time comes from the host. [randy dunlap: add missing include] [randy dunlap: disallow on Voyager or Visual WS] Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: paravirtualized clocksource: host partGlauber de Oliveira Costa
This is the host part of kvm clocksource implementation. As it does not include clockevents, it is a fairly simple implementation. We only have to register a per-vcpu area, and start writing to it periodically. The area is binary compatible with xen, as we use the same shadow_info structure. [marcelo: fix bad_page on MSR_KVM_SYSTEM_TIME] [avi: save full value of the msr, even if enable bit is clear] [avi: clear previous value of time_page] Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: SVM: enable LBR virtualizationJoerg Roedel
This patch implements the Last Branch Record Virtualization (LBRV) feature of the AMD Barcelona and Phenom processors into the kvm-amd module. It will only be enabled if the guest enables last branch recording in the DEBUG_CTL MSR. So there is no increased world switch overhead when the guest doesn't use these MSRs. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Markus Rechberger <markus.rechberger@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: SVM: allocate the MSR permission map per VCPUJoerg Roedel
This patch changes the kvm-amd module to allocate the SVM MSR permission map per VCPU instead of a global map for all VCPUs. With this we have more flexibility allowing specific guests to access virtualized MSRs. This is required for LBR virtualization. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Markus Rechberger <markus.rechberger@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: SVM: let init_vmcb() take struct vcpu_svm as parameterJoerg Roedel
Change the parameter of the init_vmcb() function in the kvm-amd module from struct vmcb to struct vcpu_svm. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Markus Rechberger <markus.rechberger@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: VMX: fix typo in VMX header defineRyan Harper
Looking at Intel Volume 3b, page 148, table 20-11 and noticed that the field name is 'Deliver' not 'Deliever'. Attached patch changes the define name and its user in vmx.c Signed-off-by: Ryan Harper <ryanh@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: SVM: add support for Nested PagingJoerg Roedel
This patch contains the SVM architecture dependent changes for KVM to enable support for the Nested Paging feature of AMD Barcelona and Phenom processors. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: MMU: add TDP support to the KVM MMUJoerg Roedel
This patch contains the changes to the KVM MMU necessary for support of the Nested Paging feature in AMD Barcelona and Phenom Processors. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: export the load_pdptrs() function to modulesJoerg Roedel
The load_pdptrs() function is required in the SVM module for NPT support. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: MMU: make the __nonpaging_map function genericJoerg Roedel
The mapping function for the nonpaging case in the softmmu does basically the same as required for Nested Paging. Make this function generic so it can be used for both. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: export information about NPT to generic x86 codeJoerg Roedel
The generic x86 code has to know if the specific implementation uses Nested Paging. In the generic code Nested Paging is called Two Dimensional Paging (TDP) to avoid confusion with (future) TDP implementations of other vendors. This patch exports the availability of TDP to the generic x86 code. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: SVM: add module parameter to disable Nested PagingJoerg Roedel
To disable the use of the Nested Paging feature even if it is available in hardware this patch adds a module parameter. Nested Paging can be disabled by passing npt=0 to the kvm_amd module. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: SVM: add detection of Nested Paging featureJoerg Roedel
Let SVM detect if the Nested Paging feature is available on the hardware. Disable it to keep this patch series bisectable. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: SVM: move feature detection to hardware setup codeJoerg Roedel
By moving the SVM feature detection from the each_cpu code to the hardware setup code it runs only once. As an additional advance the feature check is now available earlier in the module setup process. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: allow access to EFER in 32bit KVMJoerg Roedel
This patch makes the EFER register accessible on a 32bit KVM host. This is necessary to boot 32 bit PAE guests under SVM. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: VMX: unifdef the EFER specific codeJoerg Roedel
To allow access to the EFER register in 32bit KVM the EFER specific code has to be exported to the x86 generic code. This patch does this in a backwards compatible manner. [avi: add check for EFER-less hosts] Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: align valid EFER bits with the features of the host systemJoerg Roedel
This patch aligns the bits the guest can set in the EFER register with the features in the host processor. Currently it lets EFER.NX disabled if the processor does not support it and enables EFER.LME and EFER.LMA only for KVM on 64 bit hosts. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: make EFER_RESERVED_BITS configurable for architecture codeJoerg Roedel
This patch give the SVM and VMX implementations the ability to add some bits the guest can set in its EFER register. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Disable pagefaults during copy_from_user_inatomic()Andrea Arcangeli
With CONFIG_PREEMPT=n, this is needed in order to disable the fault-in code from sleeping. Signed-off-by: Andrea Arcangeli <andrea@qumranet.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Use CONFIG_PREEMPT_NOTIFIERS around struct preempt_notifierHollis Blanchard
This allows kvm_host.h to be #included even when struct preempt_notifier is undefined. This is needed to build ppc asm-offsets.h. Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: VMX: Enable Virtual Processor Identification (VPID)Sheng Yang
To allow TLB entries to be retained across VM entry and VM exit, the VMM can now identify distinct address spaces through a new virtual-processor ID (VPID) field of the VMCS. [avi: drop vpid_sync_all()] [avi: add "cc" to asm constraints] Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Limit vcpu mmap size to one page on non-x86Avi Kivity
The second page is only needed on archs that support pio. Noted by Carsten Otte. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: MMU: Decouple mmio from shadow page tablesAvi Kivity
Currently an mmio guest pte is encoded in the shadow pagetable as a not-present trapping pte, with the SHADOW_IO_MARK bit set. However nothing is ever done with this information, so maintaining it is a useless complication. This patch moves the check for mmio to before shadow ptes are instantiated, so the shadow code is never invoked for ptes that reference mmio. The code is simpler, and with future work, can be made to handle mmio concurrently. Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: x86 emulator: group decoding for group 1 instructionsAvi Kivity
Opcodes 0x80-0x83 Signed-off-by: Avi Kivity <avi@qumranet.com>
2008-04-27KVM: Only x86 has pioAvi Kivity
Signed-off-by: Avi Kivity <avi@qumranet.com>
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