- 15 Oct, 2008 40 commits
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Marcelo Tosatti authored
The PIC code makes little effort to avoid kvm_vcpu_kick(), resulting in unnecessary guest exits in some conditions. For example, if the timer interrupt is routed through the IOAPIC, IRR for IRQ 0 will get set but not cleared, since the APIC is handling the acks. This means that everytime an interrupt < 16 is triggered, the priority logic will find IRQ0 pending and send an IPI to vcpu0 (in case IRQ0 is not masked, which is Linux's case). Introduce a new variable isr_ack to represent the IRQ's for which the guest has been signalled / cleared the ISR. Use it to avoid more than one IPI per trigger-ack cycle, in addition to the avoidance when ISR is set in get_priority(). Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by:
Avi Kivity <avi@redhat.com>
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Marcelo Tosatti authored
Subject says it all. Signed-off-by:
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Marcelo Tosatti authored
Cache the unsynced children information in a per-page bitmap. Signed-off-by:
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Marcelo Tosatti authored
Allow guest pagetables to go out of sync. Instead of emulating write accesses to guest pagetables, or unshadowing them, we un-write-protect the page table and allow the guest to modify it at will. We rely on invlpg executions to synchronize individual ptes, and will synchronize the entire pagetable on tlb flushes. Signed-off-by:
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Marcelo Tosatti authored
Need to convert shadow_notrap_nonpresent -> shadow_trap_nonpresent when unsyncing pages. Signed-off-by:
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Marcelo Tosatti authored
kvm_mmu_zap_page will soon zap the unsynced children of a page. Restart list walk in such case. Signed-off-by:
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Marcelo Tosatti authored
Introduce a function to walk all parents of a given page, invoking a handler. Signed-off-by:
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Marcelo Tosatti authored
With pages out of sync invlpg needs to be trapped. For now simply nuke the entry. Untested on AMD. Signed-off-by:
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Marcelo Tosatti authored
Signed-off-by:
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Marcelo Tosatti authored
Examine guest pagetable and bring the shadow back in sync. Caller is responsible for local TLB flush before re-entering guest mode. Signed-off-by:
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Marcelo Tosatti authored
There is not much point in write protecting large mappings. This can only happen when a page is shadowed during the window between is_largepage_backed and mmu_lock acquision. Zap the entry instead, so the next pagefault will find a shadowed page via is_largepage_backed and fallback to 4k translations. Simplifies out of sync shadow. Signed-off-by:
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Marcelo Tosatti authored
Since the sync page path can collapse flushes. Signed-off-by:
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Marcelo Tosatti authored
Split the spte entry creation code into a new set_spte function. Signed-off-by:
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Marcelo Tosatti authored
It is necessary to flush all TLB's when a large spte entry is overwritten with a normal page directory pointer. Signed-off-by:
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Harvey Harrison authored
arch/x86/kernel/pvclock.c:102:6: warning: symbol 'tsc_khz' shadows an earlier one include/asm/tsc.h:18:21: originally declared here Signed-off-by:
Harvey Harrison <harvey.harrison@gmail.com> Signed-off-by:
Andrew Morton <akpm@linux-foundation.org> Signed-off-by:
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Xiantao Zhang authored
In Tukwila processor, VT-i has been enhanced in its implementation, it is often called VT-i2 techonology. With VTi-2 support, virtulization performance should be improved. In this patch, we added the related stuff to support kvm/ia64 for Tukwila processors. Signed-off-by:
Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by:
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Xiantao Zhang authored
An uniform entry kvm_vps_entry is added for vps_sync_write/read, vps_resume_handler/guest, and branches to differnt PAL service according to the offset. Singed-off-by:
Anthony Xu <anthony.xu@intel.com> Signed-off-by:
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Weidong Han authored
Currently "#include <linux/intel-iommu.h>" is not needed in virt/kvm/kvm_main.c. Signed-off-by:
Weidong Han <weidong.han@intel.com> Signed-off-by:
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Glauber Costa authored
One of vcpu_setup responsibilities is to do mmu initialization. However, in case we fail in kvm_arch_vcpu_reset, before we get the chance to init mmu. OTOH, vcpu_destroy will attempt to destroy mmu, triggering a bug. Keeping track of whether or not mmu is initialized would unnecessarily complicate things. Rather, we just make return, making sure any needed uninitialization is done before we return, in case we fail. Signed-off-by:
Glauber Costa <glommer@redhat.com> Signed-off-by:
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Gleb Natapov authored
The vcpu should process pending SIPI message before entering guest mode again. kvm_arch_vcpu_runnable() returns true if the vcpu is in SIPI state, so we can't call it here. Signed-off-by:
Gleb Natapov <gleb@qumranet.com> Signed-off-by:
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Avi Kivity authored
Signed-off-by: -
Harvey Harrison authored
Noticed by sparse: arch/x86/kvm/x86.c:3591:5: warning: symbol 'kvm_load_realmode_segment' was not declared. Should it be static? Signed-off-by:
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Marcelo Tosatti authored
Convert gfn_to_pfn to use get_user_pages_fast, which can do lockless pagetable lookups on x86. Kernel compilation on 4-way guest is 3.7% faster on VMX. Signed-off-by:
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Marcelo Tosatti authored
kvm_vm_fault is invoked with mmap_sem held in read mode. Since gfn_to_page will be converted to get_user_pages_fast, which requires this lock NOT to be held, switch to opencoded get_user_pages. Signed-off-by:
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Amit Shah authored
When an IRQ allocation fails, we free up the device structures and disable the device so that we can unregister the device in the userspace and not expose it to the guest at all. Signed-off-by:
Amit Shah <amit.shah@redhat.com> Signed-off-by:
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Ben-Ami Yassour authored
Based on a patch by: Kay, Allen M <allen.m.kay@intel.com> This patch enables PCI device assignment based on VT-d support. When a device is assigned to the guest, the guest memory is pinned and the mapping is updated in the VT-d IOMMU. [Amit: Expose KVM_CAP_IOMMU so we can check if an IOMMU is present and also control enable/disable from userspace] Signed-off-by:
Kay, Allen M <allen.m.kay@intel.com> Signed-off-by:
Ben-Ami Yassour <benami@il.ibm.com> Signed-off-by:
Amit Shah <amit.shah@qumranet.com> Acked-by:
Mark Gross <mgross@linux.intel.com> Signed-off-by:
Avi Kivity <avi@qumranet.com>
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Kay, Allen M authored
This patch extends the VT-d driver to support KVM [Ben: fixed memory pinning] [avi: move dma_remapping.h as well] Signed-off-by:
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Guillaume Thouvenin authored
For instruction 'and al,imm' we use DstAcc instead of doing the emulation directly into the instruction's opcode. Signed-off-by:
Guillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by:
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Guillaume Thouvenin authored
Add decode entries for these opcodes; execution is already implemented. Signed-off-by:
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Guillaume Thouvenin authored
Add DstAcc operand type. That means that there are 4 bits now for DstMask. "In the good old days cpus would have only one register that was able to fully participate in arithmetic operations, typically called A for Accumulator. The x86 retains this tradition by having special, shorter encodings for the A register (like the cmp opcode), and even some instructions that only operate on A (like mul). SrcAcc and DstAcc would accommodate these instructions by decoding A into the corresponding 'struct operand'." -- Avi Kivity Signed-off-by:
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Sheng Yang authored
For MSR_IA32_FEATURE_CONTROL is already there. Signed-off-by:
Sheng Yang <sheng.yang@intel.com> Signed-off-by:
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Sheng Yang authored
Signed-off-by:
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Joerg Roedel authored
Signed-off-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
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Avi Kivity authored
jmp r/m64 doesn't require the rex.w prefix to indicate the operand size is 64 bits. Set the Stack attribute (even though it doesn't involve the stack, really) to indicate this. Signed-off-by: -
Jan Kiszka authored
Commit 1c0f4f5011829dac96347b5f84ba37c2252e1e08 left a useless access of VM_ENTRY_INTR_INFO_FIELD in vmx_intr_assist behind. Clean this up. Signed-off-by:
Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by:
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Hollis Blanchard authored
And it gets in the way of get_user_pages_fast(). Signed-off-by:
Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by:
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Marcelo Tosatti authored
Since "KVM: x86: do not execute halted vcpus", HLT by vcpu0 before system reset by the IO thread will hang the guest. Mark vcpu as runnable in such case. Signed-off-by:
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Mohammed Gamal authored
Add call near absolute instruction. Signed-off-by:
Mohammed Gamal <m.gamal005@gmail.com> Signed-off-by:
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Marcelo Tosatti authored
Offline or uninitialized vcpu's can be executed if requested to perform userspace work. Follow Avi's suggestion to handle halted vcpu's in the main loop, simplifying kvm_emulate_halt(). Introduce a new vcpu->requests bit to indicate events that promote state from halted to running. Also standardize vcpu wake sites. Signed-off-by: Marcelo Tosatti <mtosatti <at> redhat.com> Signed-off-by: -
Mohammed Gamal authored
The patch adds in/out instructions to the x86 emulator. The instruction was encountered while running the BIOS while using the invalid guest state emulation patch. Signed-off-by:
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