- 01 Mar, 2010 40 commits
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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:
Avi Kivity <avi@redhat.com>
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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:Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by:
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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
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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:
Marcelo Tosatti <mtosatti@redhat.com>
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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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Gleb Natapov authored
On HW task switch newly loaded segments should me marked as accessed. Reported-by:
Lorenzo Martignoni <martignlo@gmail.com> Signed-off-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
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Avi Kivity authored
When cr0.mp is clear, the guest doesn't expect a #NM in response to a WAIT instruction. Because we always keep cr0.mp set, it will get a #NM, and potentially be confused. Fix by keeping cr0.mp set only when the fpu is inactive, and passing it through when inactive. Reported-by:
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Liu Yu authored
commit 55fb1027c1cf9797dbdeab48180da530e81b1c39 doesn't update tlbcfg correctly. Fix it. And since guest OS likes 'fixed' hardware, initialize tlbcfg everytime when guest access is useless. So move this part to init code. Signed-off-by:
Liu Yu <yu.liu@freescale.com> Acked-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
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Liu Yu authored
commit 513579e3 change the way we emulate PVR/PIR, which left PVR/PIR uninitialized on E500, and make guest puzzled. Signed-off-by:
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Liu Yu authored
Latest kernel start to access l1csr0 to contron L1. We just tell guest no operation is on going. Signed-off-by:
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Wei Yongjun authored
If we fail to alloc page for vcpu->arch.mmu.pae_root, call to free_mmu_pages() is unnecessary, which just do free the page malloc for vcpu->arch.mmu.pae_root. Signed-off-by:
Wei Yongjun <yjwei@cn.fujitsu.com> Signed-off-by:
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Avi Kivity authored
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Avi Kivity authored
'mask' is always a constant, so we can check whether it includes a bit that might be owned by the guest very cheaply, and avoid the decache call. Saves a few hundred bytes of module text. Signed-off-by:
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Avi Kivity authored
None of the other registers have the shadow_ prefix. Signed-off-by:
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Avi Kivity authored
They have more general scope than the mmu. Signed-off-by:
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Avi Kivity authored
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Avi Kivity authored
Assume that if the guest executes clts, it knows what it's doing, and load the guest fpu to prevent an #NM exception. Signed-off-by:
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Avi Kivity authored
Not used anymore. Signed-off-by:
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Avi Kivity authored
This allows accessing the guest fpu from the instruction emulator, as well as being symmetric with kvm_put_guest_fpu(). Signed-off-by:
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Gleb Natapov authored
Move to/from Control Registers chapter of Intel SDM says. "Reserved bits in CR0 remain clear after any load of those registers; attempts to set them have no impact". Control Register chapter says "Bits 63:32 of CR0 are reserved and must be written with zeros. Writing a nonzero value to any of the upper 32 bits results in a general-protection exception, #GP(0)." This patch tries to implement this twisted logic. Signed-off-by:
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Sheng Yang authored
The commit 0953ca73 "KVM: Simplify coalesced mmio initialization" allocate kvm_coalesced_mmio_ring in the kvm_coalesced_mmio_init(), but didn't discard the original allocation... Signed-off-by:
Sheng Yang <sheng@linux.intel.com> Signed-off-by:
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Jan Kiszka authored
To enable proper debug register emulation under all conditions, trap access to all DR0..7. This may be optimized later on. Signed-off-by:
Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by:
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Jan Kiszka authored
Enhance mov dr instruction emulation used by SVM so that it properly handles dr4/5: alias to dr6/7 if cr4.de is cleared. Otherwise return EMULATE_FAIL which will let our only possible caller in that scenario, ud_interception, re-inject UD. We do not need to inject faults, SVM does this for us (exceptions take precedence over instruction interceptions). For the same reason, the value overflow checks can be removed. Signed-off-by:
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Jan Kiszka authored
As we trap all debug register accesses, we do not need to switch real DR6 at all. Clean up update_exception_bitmap at this chance, too. Signed-off-by:
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Jan Kiszka authored
Make sure DR4 and DR5 are aliased to DR6 and DR7, respectively, if CR4.DE is not set. Signed-off-by:
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Jan Kiszka authored
Injecting GP without an error code is a bad idea (causes unhandled guest exits). Moreover, we must not skip the instruction if we injected an exception. Signed-off-by:
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Takuya Yoshikawa authored
The return values from x86_emulate_ops are defined in kvm_emulate.h as macros X86EMUL_*. But in emulate.c, we are comparing the return values from these ops with 0 to check if they're X86EMUL_CONTINUE or not: X86EMUL_CONTINUE is defined as 0 now. To avoid possible mistakes in the future, this patch substitutes "X86EMUL_CONTINUE" for "0" that are being compared with the return values from x86_emulate_ops. We think that there are more places we should use these macros, but the meanings of rc values in x86_emulate_insn() were not so clear at a glance. If we use proper macros in this function, we would be able to follow the flow of each emulation more easily and, maybe, more securely. Signed-off-by:
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Marcelo Tosatti authored
cleanup_srcu_struct on VM destruction remains broken: BUG: unable to handle kernel paging request at ffffffffffffffff IP: [<ffffffff802533d2>] srcu_read_lock+0x16/0x21 RIP: 0010:[<ffffffff802533d2>] [<ffffffff802533d2>] srcu_read_lock+0x16/0x21 Call Trace: [<ffffffffa05354c4>] kvm_arch_vcpu_uninit+0x1b/0x48 [kvm] [<ffffffffa05339c6>] kvm_vcpu_uninit+0x9/0x15 [kvm] [<ffffffffa0569f7d>] vmx_free_vcpu+0x7f/0x8f [kvm_intel] [<ffffffffa05357b5>] kvm_arch_destroy_vm+0x78/0x111 [kvm] [<ffffffffa053315b>] kvm_put_kvm+0xd4/0xfe [kvm] Move it to kvm_arch_destroy_vm. Signed-off-by:
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Gleb Natapov authored
Fix compilation warnings and wrong mask value. Signed-off-by:
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Sheng Yang authored
As Avi noted: >There are two problems with the kernel failure report. First, it >doesn't report enough data - registers, surrounding instructions, etc. >that are needed to explain what is going on. Second, it can flood >dmesg, which is a pretty bad thing to do. So we remove the emulation failure report in handle_invalid_guest_state(), and would inspected the guest using userspace tool in the future. Signed-off-by:
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Avi Kivity authored
Needed by <asm/kvm_para.h>. Signed-off-by: -
Takuya Yoshikawa authored
There are two spellings of "writable" in arch/x86/kvm/mmu.c and paging_tmpl.h . This patch renames is_writeble_pte() to is_writable_pte() and makes grepping easy. New name is consistent with the definition of itself: return pte & PT_WRITABLE_MASK; Signed-off-by:
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