- 20 7月, 2008 40 次提交
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由 Avi Kivity 提交于
rip relative decoding is relative to the instruction pointer of the next instruction; by moving address adjustment until after decoding is complete, we remove the need to determine the instruction size. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Consolidate the duplicated code when not in any special case. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Instead of using sparse switches, use simpler if/else sequences. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
x86_64 does not decode rex.b in certain cases, where the r/m field = 5. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Mohammed Gamal 提交于
Signed-off-by: NMohammed Gamal <m.gamal005@gmail.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Emulation failure reports are useful, so allow more than one per the lifetime of the module. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Tan, Li 提交于
Currently kvmtrace is not portable. This will prevent from copying a trace file from big-endian target to little-endian workstation for analysis. In the patch, kernel outputs metadata containing a magic number to trace log, and changes 64-bit words to be u64 instead of a pair of u32s. Signed-off-by: NTan Li <li.tan@intel.com> Acked-by: NJerone Young <jyoung5@us.ibm.com> Acked-by: NHollis Blanchard <hollisb@us.ibm.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Glauber Costa 提交于
If we're not gonna do anything (case in which failure is already reported), we do not need to even bother with calculating the linear rip. Signed-off-by: NGlauber Costa <gcosta@redhat.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Marcelo Tosatti 提交于
Only abort guest entry if the timer count went from 0->1, since for 1->2 or larger the bit will either be set already or a timer irq will have been injected. Using atomic_inc_and_test() for it also introduces an SMP barrier to the LAPIC version (thought it was unecessary because of timer migration, but guest can be scheduled to a different pCPU between exit and kvm_vcpu_block(), so there is the possibility for a race). Noticed by Avi. Signed-off-by: NMarcelo Tosatti <mtosatti@redhat.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Laurent Vivier 提交于
This patch enables coalesced MMIO for ia64 architecture. It defines KVM_MMIO_PAGE_OFFSET and KVM_CAP_COALESCED_MMIO. It enables the compilation of coalesced_mmio.c. [akpm: fix compile error on ia64] Signed-off-by: NLaurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Laurent Vivier 提交于
This patch enables coalesced MMIO for powerpc architecture. It defines KVM_MMIO_PAGE_OFFSET and KVM_CAP_COALESCED_MMIO. It enables the compilation of coalesced_mmio.c. Signed-off-by: NLaurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Laurent Vivier 提交于
This patch enables coalesced MMIO for x86 architecture. It defines KVM_MMIO_PAGE_OFFSET and KVM_CAP_COALESCED_MMIO. It enables the compilation of coalesced_mmio.c. Signed-off-by: NLaurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Laurent Vivier 提交于
This patch adds all needed structures to coalesce MMIOs. Until an architecture uses it, it is not compiled. Coalesced MMIO introduces two ioctl() to define where are the MMIO zones that can be coalesced: - KVM_REGISTER_COALESCED_MMIO registers a coalesced MMIO zone. It requests one parameter (struct kvm_coalesced_mmio_zone) which defines a memory area where MMIOs can be coalesced until the next switch to user space. The maximum number of MMIO zones is KVM_COALESCED_MMIO_ZONE_MAX. - KVM_UNREGISTER_COALESCED_MMIO cancels all registered zones inside the given bounds (bounds are also given by struct kvm_coalesced_mmio_zone). The userspace client can check kernel coalesced MMIO availability by asking ioctl(KVM_CHECK_EXTENSION) for the KVM_CAP_COALESCED_MMIO capability. The ioctl() call to KVM_CAP_COALESCED_MMIO will return 0 if not supported, or the page offset where will be stored the ring buffer. The page offset depends on the architecture. After an ioctl(KVM_RUN), the first page of the KVM memory mapped points to a kvm_run structure. The offset given by KVM_CAP_COALESCED_MMIO is an offset to the coalesced MMIO ring expressed in PAGE_SIZE relatively to the address of the start of th kvm_run structure. The MMIO ring buffer is defined by the structure kvm_coalesced_mmio_ring. [akio: fix oops during guest shutdown] Signed-off-by: NLaurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: NAkio Takebe <takebe_akio@jp.fujitsu.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Laurent Vivier 提交于
Modify member in_range() of structure kvm_io_device to pass length and the type of the I/O (write or read). This modification allows to use kvm_io_device with coalesced MMIO. Signed-off-by: NLaurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
SVM cannot benefit from page prefetching since guest page fault bypass cannot by made to work there. Avoid accessing the guest page table in this case. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
In preparation for next patch. No code change. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Encountered in FC6 boot sequence, now that we don't force ss.rpl = 0 during the protected mode transition. Not really necessary, but nice to have. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Instead of fetching the data explicitly, use SrcImmByte. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Instead of reading each pte individually, read 256 bytes worth of ptes and batch process them. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Guillaume Thouvenin 提交于
Add support for mov r, sreg (0x8c) instruction Signed-off-by: NGuillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: NLaurent Vivier <laurent.vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Guillaume Thouvenin 提交于
Add support for mov r, sreg (0x8c) instruction. [avi: drop the sreg decoding table in favor of 1:1 encoding] Signed-off-by: NGuillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: NLaurent Vivier <laurent.vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Guillaume Thouvenin 提交于
Add support to mov r, imm (0xb8) instruction. Signed-off-by: NGuillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: NLaurent Vivier <laurent.vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Guillaume Thouvenin 提交于
Add support for jmp far (opcode 0xea) instruction. Signed-off-by: NGuillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: NLaurent Vivier <laurent.vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Guillaume Thouvenin 提交于
Update c->dst.bytes in decode instruction instead of instruction itself. It's needed because if c->dst.bytes is equal to 0, the instruction is not emulated. Signed-off-by: NGuillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: NLaurent Vivier <laurent.vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Guillaume Thouvenin 提交于
Prefixes functions that will be exported with kvm_. We also prefixed set_segment() even if it still static to be coherent. signed-off-by: NGuillaume Thouvenin <guillaume.thouvenin@ext.bull.net> Signed-off-by: NLaurent Vivier <laurent.vivier@bull.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Add emulation for the memory type range registers, needed by VMware esx 3.5, and by pci device assignment. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
This can be used to simplify the x86 instruction decoder. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Sheng Yang 提交于
Signed-off-by: NSheng Yang <sheng.yang@intel.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Sheng Yang 提交于
[avi: fix ia64 build breakage] Signed-off-by: NSheng Yang <sheng.yang@intel.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Since we aren't modifying any register, there's no need to decache the register state. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Obsoleted by the vmx-specific per-cpu list. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
VMX hardware can cache the contents of a vcpu's vmcs. This cache needs to be flushed when migrating a vcpu to another cpu, or (which is the case that interests us here) when disabling hardware virtualization on a cpu. The current implementation of decaching iterates over the list of all vcpus, picks the ones that are potentially cached on the cpu that is being offlined, and flushes the cache. The problem is that it uses mutex_trylock() to gain exclusive access to the vcpu, which fires off a (benign) warning about using the mutex in an interrupt context. To avoid this, and to make things generally nicer, add a new per-cpu list of potentially cached vcus. This makes the decaching code much simpler. The list is vmx-specific since other hardware doesn't have this issue. [andrea: fix crash on suspend/resume] Signed-off-by: NAndrea Arcangeli <andrea@qumranet.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
KVM turns off hardware virtualization extensions during reboot, in order to disassociate the memory used by the virtualization extensions from the processor, and in order to have the system in a consistent state. Unfortunately virtual machines may still be running while this goes on, and once virtualization extensions are turned off, any virtulization instruction will #UD on execution. Fix by adding an exception handler to virtualization instructions; if we get an exception during reboot, we simply spin waiting for the reset to complete. If it's a true exception, BUG() so we can have our stack trace. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
The KVM MMU tries to detect when a speculative pte update is not actually used by demand fault, by checking the accessed bit of the shadow pte. If the shadow pte has not been accessed, we deem that page table flooded and remove the shadow page table, allowing further pte updates to proceed without emulation. However, if the pte itself points at a page table and only used for write operations, the accessed bit will never be set since all access will happen through the emulator. This is exactly what happens with kscand on old (2.4.x) HIGHMEM kernels. The kernel points a kmap_atomic() pte at a page table, and then proceeds with read-modify-write operations to look at the dirty and accessed bits. We get a false flood trigger on the kmap ptes, which results in the mmu spending all its time setting up and tearing down shadows. Fix by setting the shadow accessed bit on emulated accesses. Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Avi Kivity 提交于
Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Chris Lalancette 提交于
Attached is a patch that fixes a guest crash when booting older Linux kernels. The problem stems from the fact that we are currently emulating MSR_K7_EVNTSEL[0-3], but not emulating MSR_K7_PERFCTR[0-3]. Because of this, setup_k7_watchdog() in the Linux kernel receives a GPF when it attempts to write into MSR_K7_PERFCTR, which causes an OOPs. The patch fixes it by just "fake" emulating the appropriate MSRs, throwing away the data in the process. This causes the NMI watchdog to not actually work, but it's not such a big deal in a virtualized environment. When we get a write to one of these counters, we printk_ratelimit() a warning. I decided to print it out for all writes, even if the data is 0; it doesn't seem to make sense to me to special case when data == 0. Tested by myself on a RHEL-4 guest, and Joerg Roedel on a Windows XP 64-bit guest. Signed-off-by: NChris Lalancette <clalance@redhat.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Aurelien Jarno 提交于
The in-kernel PIT emulation ignores pending timers if operating under mode 3, which for example Hurd uses. This mode should output a square wave, high for (N+1)/2 counts and low for (N-1)/2 counts. As we only care about the resulting interrupts, the period is N, and mode 3 is the same as mode 2 with regard to interrupts. Signed-off-by: NAurelien Jarno <aurelien@aurel32.net> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Anthony Liguori 提交于
This patch allows VMAs that contain no backing page to be used for guest memory. This is useful for assigning mmio regions to a guest. Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Joerg Roedel 提交于
To distinguish between real page faults and nested page faults they should be traced as different events. This is implemented by this patch. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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由 Joerg Roedel 提交于
This patch adds the missing kvmtrace markers to the svm module of kvm. Signed-off-by: NJoerg Roedel <joerg.roedel@amd.com> Signed-off-by: NAvi Kivity <avi@qumranet.com>
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