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According to the Intel manual
"Intel® 64 and IA-32 Architectures Software Developer’s Manual
Volume 3", "3.4.4 Segment Loading Instructions in IA-32e Mode":
"When in compatibility mode, FS and GS overrides operate as defined by
32-bit mode behavior regardless of the value loaded into the upper 32
linear-address bits of the hidden descriptor register base field.
Compatibility mode ignores the upper 32 bits when calculating an effective address."
However, the code misses the 64-bit mode case, where an instruction with
address and segment size override would be translated incorrectly. For example,
inc dword ptr gs:260h[ebx*4] gets incorrectly translated to:
(uint32_t)(gs.base + ebx * 4 + 0x260)
instead of
gs.base + (uint32_t)(ebx * 4 + 0x260)
Signed-off-by: Vitaly Chipounov <vitaly.chipounov@epfl.ch>
Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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This patch makes Qemu recognize the PCID feature specified from configuration or command line options.
Signed-off-by: Junjie Mao <junjie.mao@intel.com>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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* qemu-kvm/uq/master:
virtio: move common irqfd handling out of virtio-pci
virtio: move common ioeventfd handling out of virtio-pci
event_notifier: add event_notifier_set_handler
memory: pass EventNotifier, not eventfd
ivshmem: wrap ivshmem_del_eventfd loops with transaction
ivshmem: use EventNotifier and memory API
event_notifier: add event_notifier_init_fd
event_notifier: remove event_notifier_test
event_notifier: add event_notifier_set
apic: Defer interrupt updates to VCPU thread
apic: Reevaluate pending interrupts on LVT_LINT0 changes
apic: Resolve potential endless loop around apic_update_irq
kvm: expose tsc deadline timer feature to guest
kvm_pv_eoi: add flag support
kvm: Don't abort on kvm_irqchip_add_msi_route()
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KVM performs TPR raising asynchronously to QEMU, specifically outside
QEMU's global lock. When an interrupt is injected into the APIC and TPR
is checked to decide if this can be delivered, a stale TPR value may be
used, causing spurious interrupts in the end.
Fix this by deferring apic_update_irq to the context of the target VCPU.
We introduce a new interrupt flag for this, CPU_INTERRUPT_POLL. When it
is set, the VCPU calls apic_poll_irq before checking for further pending
interrupts. To avoid special-casing KVM, we also implement this logic
for TCG mode.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
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Rephrase some of the expressions used to select an entry
in the SSE op table arrays so that it's clearer that they
don't overrun the op table array size.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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The X86_64_DEF macro is a confusing way of making some terms
in a conditional only appear if TARGET_X86_64 is defined. We
only use it in two places, and in both cases this is for making
the same test, so abstract that check out into a function
where we can use a more conventional #ifdef.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Commit 11f8cdb removed all the uses of the X86_64_ONLY
macro. The BUGGY_64() macro has been unused for a long time:
it originally marked some ops which couldn't be enabled
because of issues with the pre-TCG code generation scheme.
Remove the now-unnecessary definitions of both macros.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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commit c4baa0503d9623f1ce891f525ccd140c598bc29a improved SSE table
type safety which now raises compiler errors when latest QEMU was
configured with --enable-debug.
Fix this by splitting the SSE tables even further to separate
helper functions with different signatures.
Instead of crashing by calling address 0, the code now jumps to
label illegal_op.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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This patch exposes tsc deadline timer feature to guest if
1). in-kernel irqchip is used, and
2). kvm has emulated tsc deadline timer, and
3). user authorize the feature exposing via -cpu or +/- tsc-deadline
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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Support the new PV EOI flag in kvm - it recently got merged
into kvm.git. Set by default with -cpu kvm.
Set for -cpu qemu by adding +kvm_pv_eoi.
Clear by adding -kvm_pv_eoi to -cpu option.
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
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Rename what is remaining of op_helper.c to seg_helper.c.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move memory access helpers to mem_helper.c.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move various functions to misc_helper.c.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move SMM helpers to smm_helper.c.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move SVM helpers to svm_helper.c.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move integer and bit field helpers to int_helper.c.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move condition code helpers to cc_helper.c.
Move the shared inline functions lshift(), cpu_load_eflags() and
cpu_cc_compute_all() to cpu.h.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Adjust function names and add an explicit CPUX86State
parameter instead of relying on AREG0.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move shift templates from helper_template.h to
shift_helper_template.h and the condition code helpers
to cc_helper_template.h.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Fix coding style in helper_template.h before next commit.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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SSE function tables could easily be corrupted because of use
of void pointers.
Introduce function pointer types and helper variables in order
to improve type safety.
Split sse_op_table3 according to types used.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move FPU and MMX/SSE helpers to fpu_helpers.c.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Fix coding style in ops_sse.h before next commit.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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After the previous patch, we can use the proper
declaration in a common header file.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Move exception handlers from op_helper.c to excp_helper.c.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Add an explicit CPUX86State parameter instead of relying on AREG0.
Merge raise_exception_env() to raise_exception(), likewise with
raise_exception_err_env() and raise_exception_err().
Introduce cpu_svm_check_intercept_param() and cpu_vmexit()
as wrappers.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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Fix coding style and a few typos.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
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This new 'QEmu' was recently added.
Replace it by the official all upper case 'QEMU'.
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
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Use LOG_UNIMP for some target CPU cases.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Acked-by: Alexander Graf <agraf@suse.de>
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QEMU exposes its version to the guest's hardware and in some cases that is wrong
(e.g. Windows prints messages about driver updates when you switch
the QEMU version).
There is a new field now on the struct QEmuMachine, hw_version, which may
contain the version that the specific machine should report. If that field is
set, then that machine will report that version to the guest.
Signed-off-by: Crístian Viana <vianac@linux.vnet.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
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This simplifies the code and resolves TODOs.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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This simplifies things, because they will only be included for softmmu
targets and because the stubs are taken out-of-line in separate files,
which in the future could even be compiled only once.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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So that it can use the same prototype in both cases.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Also drop duplicate occurrence of device-hotplug.o.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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* qmp/queue/qmp: (29 commits)
Add 'query-events' command to QMP to query async events
qapi: convert netdev_del
qapi: convert netdev_add
net: net_client_init(): use error_set()
net: purge the monitor object from all init functions
qemu-config: introduce qemu_find_opts_err()
qemu-config: find_list(): use error_set()
qerror: introduce QERR_INVALID_OPTION_GROUP
qemu-option: qemu_opts_from_qdict(): use error_set()
qemu-option: introduce qemu_opt_set_err()
qemu-option: opt_set(): use error_set()
qemu-option: qemu_opts_validate(): use error_set()
qemu-option: qemu_opt_parse(): use error_set()
qemu-option: parse_option_size(): use error_set()
qemu-option: parse_option_bool(): use error_set()
qemu-option: parse_option_number(): use error_set()
qemu-option: qemu_opts_create(): use error_set()
introduce a new monitor command 'dump-guest-memory' to dump guest's memory
make gdb_id() generally avialable and rename it to cpu_index()
target-i386: Add API to get note's size
...
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In commit 1bba0dc932e8826a7d030df3767daf0bc339f9a2 cpu_reset()
was renamed to cpu_state_reset(), to allow introducing a new cpu_reset()
that would operate on QOM objects.
All callers have been updated except for one in target-mips, so drop all
implementations except for the one in target-mips and move the
declaration there until MIPSCPU reset can be fully QOM'ified.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Acked-by: Michael Walle <michael@walle.cc> (for lm32)
Acked-by: Max Filippov <jcmvbkbc@gmail.com> (for xtensa)
Acked-by: Edgar E. Iglesias <edgar.iglesias@gmail.com> (for mb + cris)
Acked-by: Alexander Graf <agraf@suse.de> (for ppc)
Acked-by: Blue Swirl <blauwirbel@gmail.com>
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Turn cpu_init macro into a static inline function returning CPUX86State
for backwards compatibility.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
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Allows to use cpu_reset() in place of cpu_state_reset().
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
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We should know where the note and memory is stored before writing
them to vmcore. If we know this, we can avoid using lseek() when
creating vmcore.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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Dump info contains: endian, class and architecture. The next
patch will use these information to create vmcore. Note: on
x86 box, the class is ELFCLASS64 if the memory is larger than 4G.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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The core file has register's value. But it does not include all registers value.
Store the cpu status into QEMU note, and the user can get more information
from vmcore. If you change QEMUCPUState, please count up QEMUCPUSTATE_VERSION.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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The core file contains register's value. These APIs write registers to
core file, and them will be called in the following patch.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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This API will be used in the following patch.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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Walk cpu's page table and collect all virtual address and physical address mapping.
Then, add these mapping into memory mapping list. If the guest does not use paging,
it will do nothing. Note: the I/O memory will be skipped.
Signed-off-by: Wen Congyang <wency@cn.fujitsu.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
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Changes v2 -> v3;
- Check for kvm_enabled() before setting cpuid_7_0_ebx_features
Changes v1 -> v2:
- Use kvm_arch_get_supported_cpuid() instead of host_cpuid() on
cpu_x86_fill_host().
We should use GET_SUPPORTED_CPUID for all bits on "-cpu host"
eventually, but I am not changing all the other CPUID leaves because
we may not be able to test such an intrusive change in time for 1.1.
Description of the bug:
Since QEMU 0.15, the CPUID information on CPUID[EAX=7,ECX=0] is being
returned unfiltered to the guest, directly from the GET_SUPPORTED_CPUID
return value.
The problem is that this makes the resulting CPU feature flags
unpredictable and dependent on the host CPU and kernel version. This
breaks live-migration badly if migrating from a host CPU that supports
some features on that CPUID leaf (running a recent kernel) to a kernel
or host CPU that doesn't support it.
Migration also is incorrect (the virtual CPU changes under the guest's
feet) if you migrate in the opposite direction (from an old CPU/kernel
to a new CPU/kernel), but with less serious consequences (guests
normally query CPUID information only once on boot).
Fortunately, the bug affects only users using cpudefs with level >= 7.
The right behavior should be to explicitly enable those features on
[cpudef] config sections or on the "-cpu" command-line arguments. Right
now there is no predefined CPU model on QEMU that has those features:
the latest Intel model we have is Sandy Bridge.
I would like to get this fixed on 1.1, so I am submitting this patch,
that enables those features only if "-cpu host" is being used (as we
don't have any pre-defined CPU model that actually have those features).
After 1.1 is released, we can make those features properly configurable
on [cpudef] and -cpu configuration.
One problem is: with this patch, users with the following setup:
- Running QEMU 1.0;
- Using a cpudef having level >= 7;
- Running a kernel that supports the features on CPUID leaf 7; and
- Running on a CPU that supports some features on CPUID leaf 7
won't be able to live-migrate to QEMU 1.1. But for these users
live-migration is already broken (they can't live-migrate to hosts with
older CPUs or older kernels, already), I don't see how to avoid this
problem.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
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Commit de024815e3b523addf58f1f79846b7fe74643678 (target-i386: QOM'ify
CPU init) moved mce_init() call from helper.c:cpu_x86_init() into
X86CPU's cpu.c:x86_cpu_initfn().
mce_init() checks for a family >= 6 though, so we could end up with a
sequence such as for -cpu somecpu,family=6:
x86_cpu_initfn => X86CPU::family == 5
mce_init => no-op
cpu_x86_register => X86CPU::family = 6
=> MCE unexpectedly not init'ed
or for -cpu someothercpu,family=5:
x86_cpu_initfn => X86CPU::family == 6
mce_init => init'ed
cpu_x86_register => X86CPU::family = 5
=> MCE unexpectedly init'ed
Therefore partially revert the above commit. To avoid moving
mce_init() back into helper.c, foresightedly move it into a
new x86_cpu_realize() function and, in lack of ObjectClass::realize,
call it directly from cpu_x86_init().
While at it, move the qemu_init_vcpu() call that used to follow
mce_init() in cpu_x86_init() into the new realizefn as well.
Reported-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
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Use Hz as unit.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
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