- 03 12月, 2009 3 次提交
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由 Avi Kivity 提交于
They're just copies of vcpu->run, which is readily accessible. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Mohammed Gamal 提交于
Introduces a new decode option "No64", which is used for instructions that are invalid in long mode. Signed-off-by: NMohammed Gamal <m.gamal005@gmail.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Mohammed Gamal 提交于
[avi: avoid buffer overflow] Signed-off-by: NMohammed Gamal <m.gamal005@gmail.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 04 11月, 2009 2 次提交
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由 Gleb Natapov 提交于
If TSS we are switching to resides in high memory task switch will fail since address will be truncated. Windows2k3 does this sometimes when running with more then 4G Cc: stable@kernel.org Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Jan Kiszka 提交于
We only allocate memory for 32 MCE banks (KVM_MAX_MCE_BANKS) but we allow user space to fill up to 255 on setup (mcg_cap & 0xff), corrupting kernel memory. Catch these overflows. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 16 10月, 2009 2 次提交
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由 Frederik Deweerdt 提交于
On a 32 bits compile, commit 3da0dd43 introduced the following warnings: arch/x86/kvm/mmu.c: In function ‘kvm_set_pte_rmapp’: arch/x86/kvm/mmu.c:770: warning: cast to pointer from integer of different size arch/x86/kvm/mmu.c: In function ‘kvm_set_spte_hva’: arch/x86/kvm/mmu.c:849: warning: cast from pointer to integer of different size The following patch uses 'unsigned long' instead of u64 to match the pointer size on both arches. Signed-off-by: NFrederik Deweerdt <frederik.deweerdt@xprog.eu> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Marcelo Tosatti 提交于
hrtimer->base can be temporarily NULL due to racing hrtimer_start. See switch_hrtimer_base/lock_hrtimer_base. Use hrtimer_get_remaining which is robust against it. CC: stable@kernel.org Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 04 10月, 2009 8 次提交
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由 Izik Eidus 提交于
this is needed for kvm if it want ksm to directly map pages into its shadow page tables. [marcelo: cast pfn assignment to u64] Signed-off-by: NIzik Eidus <ieidus@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Izik Eidus 提交于
this flag notify that the host physical page we are pointing to from the spte is write protected, and therefore we cant change its access to be write unless we run get_user_pages(write = 1). (this is needed for change_pte support in kvm) Signed-off-by: NIzik Eidus <ieidus@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Izik Eidus 提交于
When using mmu notifiers, we are allowed to remove the page count reference tooken by get_user_pages to a specific page that is mapped inside the shadow page tables. This is needed so we can balance the pagecount against mapcount checking. (Right now kvm increase the pagecount and does not increase the mapcount when mapping page into shadow page table entry, so when comparing pagecount against mapcount, you have no reliable result.) Signed-off-by: NIzik Eidus <ieidus@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Avi Kivity 提交于
The number of entries is multiplied by the entry size, which can overflow on 32-bit hosts. Bound the entry count instead. Reported-by: NDavid Wagner <daw@cs.berkeley.edu> Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Marcelo Tosatti 提交于
It is possible that stale EPTP-tagged mappings are used, if a vcpu migrates to a different pcpu. Set KVM_REQ_TLB_FLUSH in vmx_vcpu_load, when switching pcpus, which will invalidate both VPID and EPT mappings on the next vm-entry. Cc: stable@kernel.org Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Aurelien Jarno 提交于
Don't overflow when computing the 64-bit period from 32-bit registers. Fixes sourceforge bug #2826486. Signed-off-by: NAurelien Jarno <aurelien@aurel32.net> Cc: stable@kernel.org Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Joerg Roedel 提交于
When running nested we need to touch the l1 guests tsc_offset. Otherwise changes will be lost or a wrong value be read. Cc: stable@kernel.org Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Joerg Roedel 提交于
When svm_vcpu_load is called while the vcpu is running in guest mode the tsc adjustment made there is lost on the next emulated #vmexit. This causes the tsc running backwards in the guest. This patch fixes the issue by also adjusting the tsc_offset in the emulated hsave area so that it will not get lost. Cc: stable@kernel.org Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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- 10 9月, 2009 25 次提交
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由 Avi Kivity 提交于
Debug registers may only be accessed from cpl 0. Unfortunately, vmx will code to emulate the instruction even though it was issued from guest userspace, possibly leading to an unexpected trap later. Cc: stable@kernel.org Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Gleb Natapov 提交于
Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Marcelo Tosatti 提交于
kvm_mmu_slot_remove_write_access already calls it. Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
No need to call it before each kvm_(set|get)_msr_common() Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Avi Kivity 提交于
Only reload debug register 6 if we're running with the guest's debug registers. Saves around 150 cycles from the guest lightweight exit path. dr6 contains a couple of bits that are updated on #DB, so intercept that unconditionally and update those bits then. Signed-off-by: NAvi Kivity <avi@redhat.com> Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com>
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由 Avi Kivity 提交于
Instead of saving the debug registers from the processor to a kvm data structure, rely in the debug registers stored in the thread structure. This allows us not to save dr6 and dr7. Reduces lightweight vmexit cost by 350 cycles, or 11 percent. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Don't call adjust_vmx_controls() two times for the same control. It restores options that were dropped earlier. This loses us the cr8 exit control, which causes a massive performance regression Windows x64. Cc: stable@kernel.org Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
We know no pages are protected, so we can short-circuit the whole thing (including fairly nasty guest memory accesses). Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
update_cr8_intercept() can be triggered from userspace while there is no apic present. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Sheng Yang 提交于
QNX update WP bit when paging enabled, which is not covered yet. This one fix QNX boot with EPT. Cc: stable@kernel.org Signed-off-by: NSheng Yang <sheng@linux.intel.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Mikhail Ershov 提交于
Segment descriptors tables can be placed on two non-contiguous pages. This patch makes reading segment descriptors by linear address. Signed-off-by: NMikhail Ershov <Mike.Ershov@gmail.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Mohammed Gamal 提交于
Add missing decoder flags for adc and sbb instructions (opcodes 0x14-0x15, 0x1c-0x1d) Signed-off-by: NMohammed Gamal <m.gamal005@gmail.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
We're in arch/x86, what could we possibly be emulating? Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Anthony Liguori 提交于
According to 16.2.5 in the SDM, eflags.vm in the tss is consulted before loading and new segments. If eflags.vm == 1, then the segments are treated as 16-bit segments. The LDTR and TR are not normally available in vm86 mode so if they happen to somehow get loaded, they need to be treated as 32-bit segments. This fixes an invalid vmentry failure in a custom OS that was happening after a task switch into vm8086 mode. Since the segments were being mistakenly treated as 32-bit, we loaded garbage state. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
We set rflags.vm86 when virtualizing real mode to do through vm8086 mode; so we need to take it out again when reading rflags. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Avi Kivity 提交于
It is no longer possible to reproduce the problem any more, so presumably it has been fixed. Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Gleb Natapov 提交于
Since on vcpu entry we do it only if apic is enabled we should do it when TPR is changed while apic is disabled. This happens when windows resets HW without setting TPR to zero. Signed-off-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
Nested SVM is (in my experience) stable enough to be enabled by default. So omit the requirement to pass a module parameter. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
Not checking for this flag breaks any nested hypervisor that does not set VINTR. So fix it with this patch. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
This patch removes one indentation level from nested_svm_intr and makes the logic more readable. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
This check is not necessary. We have to sync the vcpu->arch.cr2 always back to the VMCB. This patch remove the is_nested check. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
This patch moves the handling for special nested vmexits like #pf to a separate function. This makes the kvm_override parameter obsolete and makes the code more readable. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
If nested svm fails to load the msrpm the vmrun succeeds with the old msrpm which is not correct. This patch changes the logic to roll back to host mode in case the msrpm cannot be loaded. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
This function is not longer required. So remove it. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Joerg Roedel 提交于
This patch removes the usage of nested_svm_do from the vmrun emulation path. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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