- 01 Mar, 2010 40 commits
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Jan Kiszka authored
This marks the guest single-step API improvement of 94fe45da and 91586a3b with a capability flag to allow reliable detection by user space. Signed-off-by:
Jan Kiszka <jan.kiszka@siemens.com> Cc: stable@kernel.org (2.6.33) Signed-off-by:
Avi Kivity <avi@redhat.com>
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Jan Kiszka authored
We intercept #BP while in guest debugging mode. As VM exits due to intercepted exceptions do not necessarily come with valid idt_vectoring, we have to update event_exit_inst_len explicitly in such cases. At least in the absence of migration, this ensures that re-injections of #BP will find and use the correct instruction length. Signed-off-by:
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Takuya Yoshikawa authored
This patch fixes emulate_syscall(), emulate_sysenter() and emulate_sysexit() to handle injected faults properly. Even though original code injects faults in these functions, we cannot handle these unless we use the different return value from the UNHANDLEABLE case. So this patch use X86EMUL_* codes instead of -1 and 0 and makes x86_emulate_insn() to handle these propagated faults. Be sure that, in x86_emulate_insn(), goto cannot_emulate and goto done with rc equals X86EMUL_UNHANDLEABLE have same effect. Signed-off-by:
Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
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Gleb Natapov authored
Add proper error and permission checking. This patch also change task switching code to load segment selectors before segment descriptors, like SDM requires, otherwise permission checking during segment descriptor loading will be incorrect. Cc: stable@kernel.org (2.6.33, 2.6.32) Signed-off-by:
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Takuya Yoshikawa authored
This patch injects page fault when reading descriptor in load_guest_segment_descriptor() fails with FAULT. Effects of this injection: This function is used by kvm_load_segment_descriptor() which is necessary for the following instructions: - mov seg,r/m16 - jmp far - pop ?s This patch makes it possible to emulate the page faults generated by these instructions. But be sure that unless we change the kvm_load_segment_descriptor()'s ret value propagation this patch has no effect. Signed-off-by:
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Gleb Natapov authored
Inject #UD if guest attempts to do so. This is in accordance to Intel SDM. Cc: stable@kernel.org (2.6.33, 2.6.32) Signed-off-by:
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Avi Kivity authored
The code relies on kvm->requests_lock inhibiting preemption. Noted by Jan Kiszka. Signed-off-by: -
Thomas Gleixner authored
The i8254/i8259 locks need to be real spinlocks on preempt-rt. Convert them to raw_spinlock. No change for !RT kernels. Signed-off-by:
Thomas Gleixner <tglx@linutronix.de> Signed-off-by:
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Gleb Natapov authored
Instructions with opcode 82 are not valid in 64 bit mode. Signed-off-by:
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Wei Yongjun authored
Just remove redundant semicolon. Signed-off-by:
Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by:
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Avi Kivity authored
These features are unused by modern userspace and can go away. Paravirt mmu needs to stay a little longer for live migration. Signed-off-by: -
Gleb Natapov authored
Instructions which are not allowed to have LOCK prefix should generate #UD if one is used. [avi: fold opcode 82 fix from another patch] Signed-off-by:
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Gleb Natapov authored
Add CPL checking in case emulator is tricked into emulating privilege instruction from userspace. Signed-off-by:
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Gleb Natapov authored
POPF behaves differently depending on current CPU mode. Emulate correct logic to prevent guest from changing flags that it can't change otherwise. Signed-off-by:
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Gleb Natapov authored
Make emulator check that vcpu is allowed to execute IN, INS, OUT, OUTS, CLI, STI. Signed-off-by:
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Gleb Natapov authored
Currently when x86 emulator needs to access memory, page walk is done with broadest permission possible, so if emulated instruction was executed by userspace process it can still access kernel memory. Fix that by providing correct memory access to page walker during emulation. Signed-off-by:
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Gleb Natapov authored
For some instructions CPU behaves differently for real-mode and virtual 8086. Let emulator know which mode cpu is in, so it will not poke into vcpu state directly. Signed-off-by:
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Gleb Natapov authored
Use groups mechanism to decode 0F C7 instructions. Signed-off-by:
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Gleb Natapov authored
Use groups mechanism to decode 0F BA instructions. Signed-off-by:
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Michael S. Tsirkin authored
wqh is unused, so we do not need to store it in irqfd anymore Signed-off-by:
Michael S. Tsirkin <mst@redhat.com> Signed-off-by:
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Liu Yu authored
Old method prematurely sets ESR and DEAR. Move this part after we decide to inject interrupt, which is more like hardware behave. Signed-off-by:
Liu Yu <yu.liu@freescale.com> Acked-by:
Hollis Blanchard <hollis@penguinppc.org> Acked-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
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Wei Yongjun authored
If KVM_CREATE_IRQCHIP fail due to kvm_setup_default_irq_routing(), ioapic device is not destroyed and kvm->arch.vioapic is not set to NULL, this may cause KVM_GET_IRQCHIP and KVM_SET_IRQCHIP access to unexcepted memory. Signed-off-by:
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Wei Yongjun authored
If we fail to init ioapic device or the fail to setup the default irq routing, the device register by kvm_create_pic() and kvm_ioapic_init() remain unregister. This patch fixed to do this. Signed-off-by:
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Wei Yongjun authored
kvm->arch.vioapic should be NULL in case of kvm_ioapic_init() failure due to cannot register io dev. Signed-off-by:
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Wei Yongjun authored
If fail to create pit, we should unregister kvm irq notifier which register in kvm_create_pit(). Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by:
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Sheng Yang authored
Following the new SDM. Now the bit is named "Ignore PAT memory type". Signed-off-by:
Sheng Yang <sheng@linux.intel.com> Signed-off-by:
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Avi Kivity authored
Signed-off-by: -
Jochen Maes authored
Fixed 2 codestyle issues in virt/kvm/coalesced_mmio.c Signed-off-by:
Jochen Maes <jochen.maes@sejo.be> Signed-off-by:
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Takuya Yoshikawa authored
kvm_emulate_pio() and complete_pio() both read out the RAX register value and copy it to a place into which the value read out from the port will be copied later. This patch removes this redundancy. /*** snippet from arch/x86/kvm/x86.c ***/ int complete_pio(struct kvm_vcpu *vcpu) { ... if (!io->string) { if (io->in) { val = kvm_register_read(vcpu, VCPU_REGS_RAX); memcpy(&val, vcpu->arch.pio_data, io->size); kvm_register_write(vcpu, VCPU_REGS_RAX, val); } ... Signed-off-by: -
Rik van Riel authored
Currently KVM pretends that pages with EPT mappings never got accessed. This has some side effects in the VM, like swapping out actively used guest pages and needlessly breaking up actively used hugepages. We can avoid those very costly side effects by emulating the accessed bit for EPT PTEs, which should only be slightly costly because pages pass through page_referenced infrequently. TLB flushing is taken care of by kvm_mmu_notifier_clear_flush_young(). This seems to help prevent KVM guests from being swapped out when they should not on my system. Signed-off-by:
Rik van Riel <riel@redhat.com> Signed-off-by:
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Joerg Roedel authored
This patch introduces a generic function to find out the host page size for a given gfn. This function is needed by the kvm iommu code. This patch also simplifies the x86 host_mapping_level function. Signed-off-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
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Julia Lawall authored
msr was tested above, so the second test is not needed. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @r@ expression *x; expression e; identifier l; @@ if (x == NULL || ...) { ... when forall return ...; } ... when != goto l; when != x = e when != &x *x == NULL // </smpl> Signed-off-by:
Julia Lawall <julia@diku.dk> Signed-off-by:
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Joe Perches authored
String constants that are continued on subsequent lines with \ are not good. Signed-off-by:
Joe Perches <joe@perches.com> Signed-off-by:
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Avi Kivity authored
Signed-off-by: -
Takuya Yoshikawa authored
This patch fixes kvm_fix_hypercall() to propagate X86EMUL_* info generated by emulator_write_emulated() to its callers: suggested by Marcelo. The effect of this is x86_emulate_insn() will begin to handle the page faults which occur in emulator_write_emulated(): this should be OK because emulator_write_emulated_onepage() always injects page fault when emulator_write_emulated() returns X86EMUL_PROPAGATE_FAULT. Signed-off-by:
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Takuya Yoshikawa authored
This patch fixes load_guest_segment_descriptor() to return X86EMUL_PROPAGATE_FAULT when it tries to access the descriptor table beyond the limit of it: suggested by Marcelo. I have checked current callers of this helper function, - kvm_load_segment_descriptor() - kvm_task_switch() and confirmed that this patch will change nothing in the upper layers if we do not change the handling of this return value from load_guest_segment_descriptor(). Next step: Although fixing the kvm_task_switch() to handle the propagated faults properly seems difficult, and maybe not worth it because TSS is not used commonly these days, we can fix kvm_load_segment_descriptor(). By doing so, the injected #GP becomes possible to be handled by the guest. The only problem for this is how to differentiate this fault from the page faults generated by kvm_read_guest_virt(). We may have to split this function to achive this goal. Signed-off-by:
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Zhai, Edwin authored
Enable optional parameter (default 0) - PCI segment (or domain) besides BDF, when assigning PCI device to guest. Signed-off-by:
Zhai Edwin <edwin.zhai@intel.com> Acked-by:
Chris Wright <chrisw@sous-sol.org> Signed-off-by:
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Gui Jianfeng authored
flexpriority_enabled implies cpu_has_vmx_virtualize_apic_accesses() returning true, so we don't need this check here. Signed-off-by:
Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by:
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Avi Kivity authored
Record failed msrs reads and writes, and the fact that they failed as well. Signed-off-by:
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Avi Kivity authored
- data is 64 bits wide, not unsigned long - rw is confusingly named Signed-off-by:
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