This was accessing an XMM register's low half without going through XMM_Q.
Cc: qemu-stable@nongnu.org
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
on s390 MSI-X irqs are presented as thin or adapter interrupts
for this we have to reorganize the routing entry to contain
valid information for the adapter interrupt code on s390.
To minimize impact on existing code we introduce an architecture
function to fixup the routing entry.
Signed-off-by: Frank Blaschka <frank.blaschka@de.ibm.com>
Signed-off-by: Cornelia Huck <cornelia.huck@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Running barebox on qemu-system-mips* with '-d unimp' overloads
stderr by very very many mips_cpu_handle_mmu_fault() messages:
mips_cpu_handle_mmu_fault address=b80003fd ret 0 physical 00000000180003fd prot 3
mips_cpu_handle_mmu_fault address=a0800884 ret 0 physical 0000000000800884 prot 3
mips_cpu_handle_mmu_fault pc a080cd80 ad b80003fd rw 0 mmu_idx 0
So it's very difficult to find LOG_UNIMP message.
The mips_cpu_handle_mmu_fault() messages appear on enabling ANY
logging! It's not very handy.
Adding separate log category for *_cpu_handle_mmu_fault()
logging fixes the problem.
Signed-off-by: Antony Pavlov <antonynpavlov@gmail.com>
Acked-by: Alexander Graf <agraf@suse.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Message-id: 1418489298-1184-1-git-send-email-antonynpavlov@gmail.com
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
- valgrind/KVM support
- small i386 patches
- PCI SD host controller support
- malloc/free cleanups from Markus (x86/scsi)
- IvyBridge model
- XSAVES support for KVM
- initial patches from record/replay
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
- Migration and linuxboot fixes for 2.2 regressions
- valgrind/KVM support
- small i386 patches
- PCI SD host controller support
- malloc/free cleanups from Markus (x86/scsi)
- IvyBridge model
- XSAVES support for KVM
- initial patches from record/replay
# gpg: Signature made Mon 15 Dec 2014 16:35:08 GMT using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* remotes/bonzini/tags/for-upstream: (47 commits)
sdhci: Support SDHCI devices on PCI
sdhci: Define SDHCI PCI ids
sdhci: Add "sysbus" to sdhci QOM types and methods
sdhci: Remove class "virtual" methods
sdhci: Set a default frequency clock
serial: only resample THR interrupt on rising edge of IER.THRI
serial: update LSR on enabling/disabling FIFOs
serial: clean up THRE/TEMT handling
serial: reset thri_pending on IER writes with THRI=0
linuxboot: fix loading old kernels
kvm/apic: fix 2.2->2.1 migration
target-i386: add Ivy Bridge CPU model
target-i386: add f16c and rdrand to Haswell and Broadwell
target-i386: add VME to all CPUs
pc: add 2.3 machine types
i386: do not cross the pages boundaries in replay mode
cpus: make icount warp behave well with respect to stop/cont
timer: introduce new QEMU_CLOCK_VIRTUAL_RT clock
cpu-exec: invalidate nocache translation if they are interrupted
icount: introduce cpu_get_icount_raw
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Both were added in Ivy Bridge (for which we do not have a CPU model
yet!).
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
vm86 mode extensions date back to the 486. All models should have
them.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This patch denies crossing the boundary of the pages in the replay mode,
because it can cause an exception. Do it only when boundary is
crossed by the first instruction in the block.
If current instruction already crossed the bound - it's ok,
because an exception hasn't stopped this code.
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
g_new(T, n) is neater than g_malloc(sizeof(T) * n). It's also safer,
for two reasons. One, it catches multiplication overflowing size_t.
Two, it returns T * rather than void *, which lets the compiler catch
more type errors.
This commit only touches allocations with size arguments of the form
sizeof(T).
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Add xsaves related definition, it also adds corresponding part
to kvm_get/put, and vmstate.
Signed-off-by: Wanpeng Li <wanpeng.li@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
These represent xsave-related capabilities of the processor, and KVM may
or may not support them.
Add feature bits so that they are considered by "-cpu ...,enforce", and use
the new feature work instead of calling kvm_arch_get_supported_cpuid.
Bit 3 (XSAVES) is not migratables because it requires saving MSR_IA32_XSS.
Neither KVM nor any commonly available hardware supports it anyway.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
struct kvm_vcpu_events contains reserved fields. Let's use a
designated initializer to avoid false positives in valgrind.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
struct kvm_msrs contains a pad field. Let's use a designated
initializer on the info part to avoid false positives from
valgrind/memcheck.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
struct kvm_msrs contains padding bytes. Let's use a designated
initializer on the info part to avoid false positives from
valgrind/memcheck. Do the same for generic MSRS, the TSC and
feature control.
We also need to zero out the reserved fields in the entries.
We do this in kvm_msr_entry_set as suggested by Paolo. This
avoids a big memset that a designated initializer on the
full structure would do.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
struct kvm_xcrs contains padding bytes. Let's use a designated
initializer to avoid false positives from valgrind/memcheck.
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Compute kvm_irqfds_allowed by checking the KVM_CAP_IRQFD extension.
Remove direct settings in architecture specific files.
Add a new kvm_resamplefds_allowed variable, initialized by
checking the KVM_CAP_IRQFD_RESAMPLE extension. Add a corresponding
kvm_resamplefds_enabled() function.
A special notice for s390 where KVM_CAP_IRQFD was not immediatly
advirtised when irqfd capability was introduced in the kernel.
KVM_CAP_IRQ_ROUTING was advertised instead.
This was fixed in "KVM: s390: announce irqfd capability",
ebc3226202d5956a5963185222982d435378b899 whereas irqfd support
was brought in 84223598778ba08041f4297fda485df83414d57e,
"KVM: s390: irq routing for adapter interrupts". Both commits
first appear in 3.15 so there should not be any kernel
version impacted by this QEMU modification.
Signed-off-by: Eric Auger <eric.auger@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This patch simplifies the AES code, by directly accessing the newly added
S-Box, InvS-Box and InvMixColumns tables instead of recreating them by
using the AES_Te and AES_Td tables.
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
TCG generates optimized code for i386 repz instructions in single step mode.
It means that when ecx becomes 0, execution of the string instruction breaks
immediately without an additional iteration for ecx==0 (which will only check
ecx and set the flags). Omitting this iteration leads to different
instructions counting in singlestep mode and in normal execution.
This patch disables optimization of this last iteration for icount mode
which should be deterministic.
v2: inverted the condition and formatted the comment
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Richard Henderson <rth@twiddle.net>
After the next patch, if a masked PIC interrupts causes CPU_INTERRUPT_POLL
to be set, the CPU will spuriously get out of halted state. While this
is technically valid, we should avoid that.
Make CPU_INTERRUPT_POLL run apic_update_irq in the right thread and then
look at CPU_INTERRUPT_HARD. If CPU_INTERRUPT_HARD does not get set,
do not report the CPU as having work.
Also move the handling of software-disabled APIC from apic_update_irq
to apic_irq_pending, and always trigger CPU_INTERRUPT_POLL. This will
be important once we will add a case that resets CPU_INTERRUPT_HARD
from apic_update_irq. We want to run it even if we go through
CPU_INTERRUPT_POLL, and even if the local APIC is software disabled.
Reported-by: Richard Bilson <rbilson@qnx.com>
Tested-by: Richard Bilson <rbilson@qnx.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
patches, pending confirmation from the submitter that they really
fix QNX.
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
x86 and SCSI fixes. I left out the APIC device model
patches, pending confirmation from the submitter that they really
fix QNX.
# gpg: Signature made Thu 13 Nov 2014 15:13:38 GMT using RSA key ID 78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg: aka "Paolo Bonzini <pbonzini@redhat.com>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg: It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 46F5 9FBD 57D6 12E7 BFD4 E2F7 7E15 100C CD36 69B1
# Subkey fingerprint: F133 3857 4B66 2389 866C 7682 BFFB D25F 78C7 AE83
* remotes/bonzini/tags/for-upstream:
acpi: accurate overflow check
smbios: change 'ram_addr_t' variables to 'uint64_t'
kvmclock: Add comment explaining why we need cpu_clean_all_dirty()
target-i386: fix Coverity complaints about overflows
apic_common: migrate missing fields
target-i386: eliminate dead code and hoist common code out of "if"
virtio-scsi: Fix comment for VirtIOSCSIReq
virtio-scsi: dataplane: suppress guest notification
esp: Do not overwrite ESP_TCHI after reset
virtio-scsi: dataplane: fix allocation for 'cmd_vrings'
esp: fix coding standards
virtio-scsi: work around bug in old BIOSes
esp-pci: fixup deadlock with linux
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
sipi_vector is an int; it is shifted by 12 and passed as a 64-bit value,
which makes Coverity think that we wanted (uint64_t)sipi_vector << 12.
But actually it must be between 0 and 255. Make this explicit.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
ist != 0 is checked in the first "if", so it cannot be true in
the "else if" part. While at it, simplify the code and move
the ESP alignment out of the conditionals.
Reported by Coverity.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
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Merge remote-tracking branch 'remotes/mjt/tags/pull-trivial-patches-2014-11-11' into staging
trivial patches for 2014-11-11
# gpg: Signature made Tue 11 Nov 2014 14:38:39 GMT using RSA key ID A4C3D7DB
# gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>"
# gpg: aka "Michael Tokarev <mjt@corpit.ru>"
# gpg: aka "Michael Tokarev <mjt@debian.org>"
* remotes/mjt/tags/pull-trivial-patches-2014-11-11:
block: Fix comment for bdrv_co_get_block_status
sysbus: Correct SYSTEM_BUS(obj) defines
target-i386: cpu: keeping function parameters alignment on new line
xen-hvm: Remove redundant variable 'xstate'
coroutine-sigaltstack: Change jmp_buf to sigjmp_buf
pc-bios: petalogix-s3adsp1800.dtb: Use 'xlnx, xps-ethernetlite-2.00.a' instead of 'xlnx, xps-ethernetlite-2.00.b'
gdbstub: Add a missing case of signal number translation in gdbstub
numa: make 'info numa' take into account hotplugged memory
slirp/smbd: modify/set several parameters in generated smbd.conf
qemu-doc.texi: fix typos in x509 examples
icc_bus: fix typo ICC_BRIGDE -> ICC_BRIDGE
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Make SVM be disabled by default on all CPU models when in KVM mode.
Nested SVM is enabled by default in the KVM kernel module, but it is
probably less stable than nested VMX (which is already disabled by
default).
Add a new compat function, x86_cpu_compat_kvm_no_autodisable(), to keep
compatibility on previous machine-types.
Suggested-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
TCG doesn't support VMX, and nested VMX is not enabled by default in the
KVM kernel module.
So, there's no reason to have VMX enabled by default on the core2duo and
coreduo CPU models, today. Even the newer Intel CPU model definitions
don't have it enabled.
In this case, we need machine-type compat code, as people may be running
the older machine-types on hosts that had VMX nesting enabled.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
The following CPU features were never supported by neither TCG or KVM,
so they are useless on the CPU model definitions, today:
* CPUID_DTS (DS)
* CPUID_HT
* CPUID_TM
* CPUID_PBE
* CPUID_EXT_DTES64
* CPUID_EXT_DSCPL
* CPUID_EXT_EST
* CPUID_EXT_TM2
* CPUID_EXT_XTPR
* CPUID_EXT_PDCM
* CPUID_SVM_LBRV
As using "enforce" mode is the only way to ensure guest ABI doesn't
change when moving to a different host, we should make "enforce" mode
the default or at least encourage management software to always use it.
In turn, to make "enforce" usable, we need CPU models that work without
always requiring some features to be explicitly disabled. This patch
removes the above features from all CPU model definitions.
We won't need any machine-type compat code for those changes, because it
is impossible to have existing VMs with those features enabled.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Cc: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Andreas Färber <afaerber@suse.de>
KVM never supported the CPUID_ACPI flag, so it doesn't make sense to
have it enabled by default when KVM is enabled.
The motivation here is exactly the same we had for the MONITOR flag
(disabled by commit 136a7e9a85).
And like in the MONITOR flag case, we don't need machine-type compat code
because it is currently impossible to run a KVM VM with the ACPI flag set.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
The x86_cpu_compat_disable_kvm_features() name was a bit confusing, as
it won't forcibly disable the feature for all CPU models (i.e. add it to
kvm_default_unset_features), but it will instead turn off the KVM
auto-enabling of the feature (i.e. remove it from kvm_default_features),
meaning the feature may still be enabled by default in some CPU models).
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
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Merge remote-tracking branch 'remotes/mjt/tags/pull-trivial-patches-2014-11-02' into staging
trivial patches for 2014-11-02
# gpg: Signature made Sun 02 Nov 2014 11:54:43 GMT using RSA key ID A4C3D7DB
# gpg: Good signature from "Michael Tokarev <mjt@tls.msk.ru>"
# gpg: aka "Michael Tokarev <mjt@corpit.ru>"
# gpg: aka "Michael Tokarev <mjt@debian.org>"
* remotes/mjt/tags/pull-trivial-patches-2014-11-02: (23 commits)
vdi: wrapped uuid_unparse() in #ifdef
tap: fix possible fd leak in net_init_tap
tap: do not close(fd) in net_init_tap_one
target-i386: Remove unused model_features_t struct
tap_int.h: remove repeating NETWORK_SCRIPT defines
os-posix: reorder parent notification for -daemonize
pidfile: stop making pidfile error a special case
os-posix: replace goto again with a proper loop
os-posix: use global daemon_pipe instead of cryptic fds[1]
dump: Fix dump-guest-memory termination and use-after-close
virtio-9p-proxy: improve error messages in connect_namedsocket()
virtio-9p-proxy: fix error return in proxy_init()
virtio-9p-proxy: Fix sockfd leak
target-tricore: check return value before using it
net/slirp: specify logbase for smbd
Revert "os-posix: report error message when lock file failed"
util: Improve os_mem_prealloc error message
sparse: fix build
target-arm: A64: remove redundant store
target-xtensa: mark XtensaConfig structs as unused
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
The struct is not used anymore and can be removed.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This patch fixes instructions counting when execution is stopped on
breakpoint (e.g. set from gdb). Without a patch extra instruction is translated
and icount is incremented by invalid value (which equals to number of
executed instructions + 1).
Signed-off-by: Pavel Dovgalyuk <pavel.dovgaluk@ispras.ru>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Only Intel CPUs support hyperthreading. When users select threads>1 in
-smp option, QEMU fixes it by adjusting CPUID_0000_0001_EBX and
CPUID_8000_0008_ECX based on inputs (sockets, cores, threads);
so guest VM can boot correctly. However it is still better to gives
users a warning when such case happens.
Signed-off-by: Wei Huang <wei@redhat.com>
[As suggested by Eduardo, check for !IS_INTEL instead of AMD. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
kvmclock fix. This was reverted last minute for 2.1, but it is now back
with the problematic case fixed.
Note: I will soon switch to a subkey for signing purposes. To verify
future signed pull requests from me, please update my key with
"gpg --recv-keys 9B4D86F2". You should see 3 new subkeys---the
one for signing will be a 2048-bit RSA key, 4E6B09D7.
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging
Usual mix of patches, the most important being Alex and Marcelo's
kvmclock fix. This was reverted last minute for 2.1, but it is now back
with the problematic case fixed.
Note: I will soon switch to a subkey for signing purposes. To verify
future signed pull requests from me, please update my key with
"gpg --recv-keys 9B4D86F2". You should see 3 new subkeys---the
one for signing will be a 2048-bit RSA key, 4E6B09D7.
# gpg: Signature made Fri 26 Sep 2014 15:34:44 BST using RSA key ID 9B4D86F2
# gpg: Good signature from "Paolo Bonzini <pbonzini@redhat.com>"
# gpg: aka "Paolo Bonzini <bonzini@gnu.org>"
* remotes/bonzini/tags/for-upstream:
kvm/valgrind: don't mark memory as initialized
po: fix conflict with %.mo rule in rules.mak
kvmvapic: fix migration when VM paused and when not running Windows
serial: check if backed by a physical serial port at realize time
serial: reset state at startup
target-i386: update fp status fix
hw/dma/i8257: Silence phony error message
kvmclock: Ensure time in migration never goes backward
kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation
Introduce cpu_clean_all_dirty
pit: fix pit interrupt can't inject into vm after migration
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Note that the code that was within the "exit" ifdef block
was identical to the cpu_compute_eflags inline, so make that
simplification at the same time.
Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Message-id: 1410626734-3804-4-git-send-email-rth@twiddle.net
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This patch introduces cpu_set_fpuc() function, which changes fpuc field
of the CPU state and calls update_fp_status() function.
These calls update status of softfloat library and prevent bugs caused
by non-coherent rounding settings of the FPU and softfloat.
v2 changes:
* Added missed calls and intoduced setter function (as suggested by TeLeMan)
Reviewed-by: TeLeMan <geleman@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Pavel Dovgalyuk <Pavel.Dovgaluk@ispras.ru>
Instead of simply printing a warning, report an error when invalid CPU
options are provided on the CPU model string.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
When the "migratable" property was implemented, the behavior was tested
by changing the default on the code, but actually using the option on
the command-line (e.g. "-cpu host,migratable=false") doesn't work as
expected. This is a regression for a common use case of "-cpu host",
which is to enable features that are supported by the host CPU + kernel
before feature-specific code is added to QEMU.
Fix this by initializing the feature words for "-cpu host" on
x86_cpu_parse_featurestr(), right after parsing the CPU options.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Michael Roth <mdroth@linux.vnet.ibm.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Andreas Färber <afaerber@suse.de>
of the NMI monitor command.
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Merge remote-tracking branch 'remotes/kvm/tags/for-upstream' into staging
Mostly bugfixes + Alexey's interface-based implementation
of the NMI monitor command.
# gpg: Signature made Thu 28 Aug 2014 15:07:22 BST using RSA key ID 9B4D86F2
# gpg: Good signature from "Paolo Bonzini <pbonzini@redhat.com>"
# gpg: aka "Paolo Bonzini <bonzini@gnu.org>"
* remotes/kvm/tags/for-upstream:
mc146818rtc: reinitialize irq_reinject_on_ack_count on reset
target-i386: Add "tsc_adjust" CPU feature name
target-i386: Add "mpx" CPU feature name
vl: process -object after other backend options
checkpatch.pl: adjust typedef definition to QEMU coding style
x86: Clear MTRRs on vCPU reset
x86: kvm: Add MTRR support for kvm_get|put_msrs()
x86: Use common variable range MTRR counts
target-i386: Don't forbid NX bit on PAE PDEs and PTEs
spapr: Add support for new NMI interface
s390x: Migrate to new NMI interface
s390x: Convert QEMUMachine to MachineClass
cpus: Define callback for QEMU "nmi" command
kvm: run cpu state synchronization on target vcpu thread
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
tsc_adjust migration support is already implemented (commit
f28558d3d3), so we can add it to the list
of known feature names.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Migration support for MPX is already implemented (commit
79e9ebebbf), so we can add it to the list
of known feature names.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The SDM specifies (June 2014 Vol3 11.11.5):
On a hardware reset, the P6 and more recent processors clear the
valid flags in variable-range MTRRs and clear the E flag in the
IA32_MTRR_DEF_TYPE MSR to disable all MTRRs. All other bits in the
MTRRs are undefined.
We currently do none of that, so whatever MTRR settings you had prior
to reset is what you have after reset. Usually this doesn't matter
because KVM often ignores the guest mappings and uses write-back
anyway. However, if you have an assigned device and an IOMMU that
allows NoSnoop for that device, KVM defers to the guest memory
mappings which are now stale after reset. The result is that OVMF
rebooting on such a configuration takes a full minute to LZMA
decompress the firmware volume, a process that is nearly instant on
the initial boot.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The MTRR state in KVM currently runs completely independent of the
QEMU state in CPUX86State.mtrr_*. This means that on migration, the
target loses MTRR state from the source. Generally that's ok though
because KVM ignores it and maps everything as write-back anyway. The
exception to this rule is when we have an assigned device and an IOMMU
that doesn't promote NoSnoop transactions from that device to be cache
coherent. In that case KVM trusts the guest mapping of memory as
configured in the MTRR.
This patch updates kvm_get|put_msrs() so that we retrieve the actual
vCPU MTRR settings and therefore keep CPUX86State synchronized for
migration. kvm_put_msrs() is also used on vCPU reset and therefore
allows future modificaitons of MTRR state at reset to be realized.
Note that the entries array used by both functions was already
slightly undersized for holding every possible MSR, so this patch
increases it beyond the 28 new entries necessary for MTRR state.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We currently define the number of variable range MTRR registers as 8
in the CPUX86State structure and vmstate, but use MSR_MTRRcap_VCNT
(also 8) to report to guests the number available. Change this to
use MSR_MTRRcap_VCNT consistently.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit e8f6d00c30 ("target-i386: raise
page fault for reserved physical address bits") added a check that the
NX bit is not set on PAE PDPEs, but it also added it to rsvd_mask for
the rest of the function. This caused any PDEs or PTEs with NX set to be
erroneously rejected, making PAE guests with NX support unusable.
Signed-off-by: William Grant <wgrant@ubuntu.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Currently syscall instruction is buggy on user mode X86_64,
the EIP is updated after do_syscall(), that is too late for
clone(). Because clone() will create a thread at the env->EIP
(the address of syscall insn), and then child thread enters
do_syscall() again, that is not expected. Sometimes it is tragic.
User mode syscall insn emulation is not used MSR, so the
action should be same to INT 0x80. INT 0x80 will update EIP in
do_interrupt(), ditto for syscall() for consistency.
Signed-off-by: Jincheng Miao <jmiao@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
Signed-off-by: Chen Fan <chen.fan.fnst@cn.fujitsu.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Previously, execute would be disabled for all pages with SMEP enabled,
regardless of what mode the access took place in.
Signed-off-by: Ricky Zhou <ricky@rzhou.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
KVM_FEATURE_CLOCKSOURCE_STABLE_BIT is enabled by default and supported
by KVM. But not having a name defined makes QEMU treat it as an unknown
and unmigratable feature flag (as any unknown feature may possibly
require state to be migrated), and disable it by default on "-cpu host".
As a side-effect, the new name also makes the flag configurable,
allowing the user to disable it (which may be useful for testing or for
compatibility with old kernels).
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This adds a new CPU model named "Broadwell". It has all the features
from Haswell, plus PREFETCHW, RDSEED, ADX, SMAP.
PREFETCHW was already supported as "3dnowprefetch".
RDSEED, ADX was added on Linux v3.15-rc1.
SMAP was added on Linux v3.15-rc2.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Cc: Wang, Yong Y <yong.y.wang@intel.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Dugger, Donald D <donald.d.dugger@intel.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Expose "Invariant TSC" flag, if KVM is enabled. From Intel documentation:
17.13.1 Invariant TSC The time stamp counter in newer processors may
support an enhancement, referred to as invariant TSC. Processor’s
support for invariant TSC is indicated by CPUID.80000007H:EDX[8].
The invariant TSC will run at a constant rate in all ACPI P-, C-.
and T-states. This is the architectural behavior moving forward. On
processors with invariant TSC support, the OS may use the TSC for wall
clock timer services (instead of ACPI or HPET timers). TSC reads are
much more efficient and do not incur the overhead associated with a ring
transition or access to a platform resource.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
[ehabkost: redo feature filtering to use .tcg_features]
[ehabkost: add CPUID_APM_INVTSC macro, add it to .unmigratable_flags]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Invariant TSC documentation mentions that "invariant TSC will run at a
constant rate in all ACPI P-, C-. and T-states".
This is not the case if migration to a host with different TSC frequency
is allowed, or if savevm is performed. So block migration/savevm.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
[AF+mtosatti: Updated error message]
Signed-off-by: Andreas Färber <afaerber@suse.de>
Having only migratable flags reported by default on the "host" CPU model
is safer for the following reasons:
* Existing users may expect "-cpu host" to be migration-safe, if they
take care of always using compatible host CPUs, host kernels, and
QEMU versions.
* Users who don't care aboug migration and want to enable all features
supported by the host kernel can simply change their setup to use
migratable=no.
Without this change, people using "-cpu host" will stop being able to
migrate, because now "invtsc" is getting enabled by default.
We are not setting migratable=yes by default on all X86CPU subclasses,
because users should be able to get non-migratable features enabled if
they ask for them explicitly.
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This flag will allow the user to choose between two modes:
* All flags that can be enabled on the host, even if unmigratable
(migratable=no);
* All flags that can be enabled on the host, are known to QEMU
and migratable (migratable=yes).
The default is still migratable=false, to keep current behavior, but
this will be changed to migratable=true by another patch.
My plan was to support the "migratable" flag on all CPU classes, but
have the default to "false" on all CPU models except "host". However,
DeviceClass has no mechanism to allow a child class to have a different
property default from the parent class yet, so by now only the "host"
CPU model will support the "migratable" flag.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
If enforce/check is specified in TCG mode, QEMU will ensure all CPU
features are supported by TCG, so no CPU feature is silently disabled.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
[AF: Be explicit about TCG vs. !KVM]
Signed-off-by: Andreas Färber <afaerber@suse.de>
Instead of manually filtering each feature word, add a tcg_features
field to FeatureWordInfo, and use that field to filter all feature words
in TCG mode.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Now that we have the feature word arrays, we don't need to manually copy
each array item, we can simply iterate through each feature word.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Those macros will be used in the feature_word_info array data, so need
to be defined earlier.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
TCG doesn't support any of the feature flags on FEAT_KVM and
FEAT_C000_0001_EDX feature words, so clear all bits on those feature
words.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
The TCG_7_0_EBX_FEATURES macro was defined but never used (it even had a
typo that was never noticed). Make the existing TCG feature filtering
code use it.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: Andreas Färber <afaerber@suse.de>
Instead of an #ifdef in the middle of the code, just set
TCG_EXT2_FEATURES to a different value depending on TARGET_X86_64.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This will allow us to re-use the feature filtering logic (and the
check/enforce flag logic) for TCG.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This will help us simplify the code that calls
report_unavailable_features() later.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Merge filter_features_for_kvm() and kvm_check_features_against_host().
Both functions made exactly the same calculations, the only difference
was that filter_features_for_kvm() changed the bits on cpu->features[],
and kvm_check_features_against_host() did error reporting.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Instead of checking and calling unavailable_host_feature() once for each
bit, simply call the function (now renamed to
report_unavailable_features()) once for each feature word.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
[AF: Drop unused return value]
Signed-off-by: Andreas Färber <afaerber@suse.de>
KVM never supported the MONITOR flag so it doesn't make sense to have it
enabled by default when KVM is enabled.
The rationale here is similar to the cases where it makes sense to have
a feature enabled by default on all CPU models when on KVM mode (e.g.
x2apic). In this case we are having a feature disabled by default for
the same reasons.
In this case we don't need machine-type compat code because it is
currently impossible to run a KVM VM with the MONITOR flag set.
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This patch eliminates the (now) redundant copy of the Advanced Encryption Standard (AES)
ShiftRows and InvShiftRows tables; the code is updated to use the common tables declared in
include/qemu/aes.h.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
After previous Peter patch, they are redundant. This way we don't
assign them except when needed. Once there, there were lots of case
where the ".fields" indentation was wrong:
.fields = (VMStateField []) {
and
.fields = (VMStateField []) {
Change all the combinations to:
.fields = (VMStateField[]){
The biggest problem (appart from aesthetics) was that checkpatch complained
when we copy&pasted the code from one place to another.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Acked-by: Alexey Kardashevskiy <aik@ozlabs.ru>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Because of the "goto out", the contents of local_err are leaked
and lost.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
The function tcg_gen_lshift() is unused; remove it.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
* remotes/bonzini/softmmu-smap: (33 commits)
target-i386: cleanup x86_cpu_get_phys_page_debug
target-i386: fix protection bits in the TLB for SMEP
target-i386: support long addresses for 4MB pages (PSE-36)
target-i386: raise page fault for reserved bits in large pages
target-i386: unify reserved bits and NX bit check
target-i386: simplify pte/vaddr calculation
target-i386: raise page fault for reserved physical address bits
target-i386: test reserved PS bit on PML4Es
target-i386: set correct error code for reserved bit access
target-i386: introduce support for 1 GB pages
target-i386: introduce do_check_protect label
target-i386: tweak handling of PG_NX_MASK
target-i386: commonize checks for PAE and non-PAE
target-i386: commonize checks for 4MB and 4KB pages
target-i386: commonize checks for 2MB and 4KB pages
target-i386: fix coding standards in x86_cpu_handle_mmu_fault
target-i386: simplify SMAP handling in MMU_KSMAP_IDX
target-i386: fix kernel accesses with SMAP and CPL = 3
target-i386: move check_io helpers to seg_helper.c
target-i386: rename KSMAP to KNOSMAP
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* remotes/kvm/uq/master:
kvm: Fix eax for cpuid leaf 0x40000000
kvmclock: Ensure proper env->tsc value for kvmclock_current_nsec calculation
kvm: Enable -cpu option to hide KVM
kvm: Ensure negative return value on kvm_init() error handling path
target-i386: set CC_OP to CC_OP_EFLAGS in cpu_load_eflags
target-i386: get CPL from SS.DPL
target-i386: rework CPL checks during task switch, preparing for next patch
target-i386: fix segment flags for SMM and VM86 mode
target-i386: Fix vm86 mode regression introduced in fd460606fd.
kvm_stat: allow choosing between tracepoints and old stats
kvmclock: Ensure time in migration never goes backward
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
User pages must be marked as non-executable when running under SMEP;
otherwise, fetching the page first and then calling it will fail.
With this patch, all SMEP testcases in kvm-unit-tests now pass.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
4MB pages can use 40-bit addresses by putting the higher 8 bits in bits
20-13 of the PDE. Bit 21 is reserved.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Remove the tail of the PAE case, so that we can use "goto" in the
next patch to jump to the protection checks.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Do not use this MMU index at all if CR4.SMAP is false, and drop
the SMAP check from x86_cpu_handle_mmu_fault.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
With SMAP, implicit kernel accesses from user mode always behave as
if AC=0. To do this, kernel mode is not anymore a separate MMU mode.
Instead, KERNEL_IDX is renamed to KSMAP_IDX and the kernel mode accessors
wrap KSMAP_IDX and KNOSMAP_IDX.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This will collect all load and store helpers soon. For now
it is just a replacement for softmmu_exec.h, which this patch
stops including directly, but we also include it where this will
be necessary in order to simplify the next patch.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
They do not need to be in op_helper.c. Because cputlb.c now includes
softmmu_template.h twice for each size, io_readX must be elided the
second time through.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Since Linux kernel 3.5, KVM has documented eax for leaf 0x40000000
to be KVM_CPUID_FEATURES:
57c22e5f35
But qemu still tries to set it to 0. It would be better to make qemu
and kvm consistent. This patch just fixes this issue.
Signed-off-by: Jidong Xiao <jidong.xiao@gmail.com>
[Include kvm_base in the value. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The latest Nvidia driver (337.88) specifically checks for KVM as the
hypervisor and reports Code 43 for the driver in a Windows guest when
found. Removing or changing the KVM signature is sufficient for the
driver to load and work. This patch adds an option to easily allow
the KVM hypervisor signature to be hidden using '-cpu kvm=off'. We
continue to expose KVM via the cpuid value by default. The state of
this option does not supercede or replace -enable-kvm or the accel=kvm
machine option. This only changes the visibility of KVM to the guest
and paravirtual features specifically tied to the KVM cpuid.
Signed-off-by: Alex Williamson <alex.williamson@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Rather than include helper.h with N values of GEN_HELPER, include a
secondary file that sets up the macros to include helper.h. This
minimizes the files that must be rebuilt when changing the macros
for file N.
Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
There is no reason to keep that out of the function. The comment refers
to the disassembler's cc_op state rather than the CPUState field.
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
CS.RPL is not equal to the CPL in the few instructions between
setting CR0.PE and reloading CS. We get this right in the common
case, because writes to CR0 do not modify the CPL, but it would
not be enough if an SMI comes exactly during that brief period.
Were this to happen, the RSM instruction would erroneously set
CPL to the low two bits of the real-mode selector; and if they are
not 00, the next instruction fetch cannot access the code segment
and causes a triple fault.
However, SS.DPL *is* always equal to the CPL. In real processors
(AMD only) there is a weird case of SYSRET setting SS.DPL=SS.RPL
from the STAR register while forcing CPL=3, but we do not emulate
that.
Tested-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
During task switch, all of CS.DPL, CS.RPL, SS.DPL must match (in addition
to all the other requirements) and will be the new CPL. So far this worked
by carefully setting the CS selector and flags before doing the task
switch; but this will not work once we get the CPL from SS.DPL.
Temporarily assume that the CPL comes from CS.RPL during task switch
to a protected-mode task, until the descriptor of SS is loaded.
Tested-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
With the next patch, these need to be correct or VM86 tasks
have the wrong CPL. The flags are basically what the Intel VMX
documentation say is mandatory for entry into a VM86 guest.
For consistency, SMM ought to have the same flags except with
CPL=0.
Tested-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Commit fd460606fd moved setting of eflags above calls to
cpu_x86_load_seg_cache() in seg_helper.c. Unfortunately, in
do_interrupt_protected() this moved the clearing of VM_MASK above a
test for it.
Fix this regression by storing the value of VM_MASK at the start of
do_interrupt_protected().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* remotes/kvm/uq/master:
pc: port 92 reset requires a low->high transition
cpu: make CPU_INTERRUPT_RESET available on all targets
apic: do not accept SIPI on the bootstrap processor
target-i386: preserve FPU and MSR state on INIT
target-i386: fix set of registers zeroed on reset
kvm: forward INIT signals coming from the chipset
kvm: reset state from the CPU's reset method
target-i386: the x86 CPL is stored in CS.selector - auto update hflags accordingly.
target-i386: set eflags prior to calling cpu_x86_load_seg_cache() in seg_helper.c
target-i386: set eflags and cr0 prior to calling cpu_x86_load_seg_cache() in smm_helper.c
target-i386: set eflags prior to calling svm_load_seg_cache() in svm_helper.c
pci-assign: limit # of msix vectors
pci-assign: Fix a bug when map MSI-X table memory failed
kvm: make one_reg helpers available for everyone
target-i386: Remove unused data from local array
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
On the x86, some devices need access to the CPU reset pin (INIT#).
Provide a generic service to do this, using one of the internal
cpu_interrupt targets. Generalize the PPC-specific code for
CPU_INTERRUPT_RESET to other targets.
Since PPC does not support migration across QEMU versions (its
machine types are not versioned yet), I picked the value that
is used on x86, CPU_INTERRUPT_TGT_INT_1. Consequently, TGT_INT_2
and TGT_INT_3 are shifted down by one while keeping their value.
Reviewed-by: Anthony Liguori <aliguori@us.ibm.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Most MSRs, plus the FPU, MMX, MXCSR, XMM and YMM registers should not
be zeroed on INIT (Table 9-1 in the Intel SDM). Copy them out of
CPUX86State and back in, instead of special casing env->pat.
The relevant fields are already consecutive except PAT and SMBASE.
However:
- KVM and Hyper-V MSRs should be reset because they include memory
locations written by the hypervisor. These MSRs are moved together
at the end of the preserved area.
- SVM state can be moved out of the way since it is written by VMRUN.
Cc: Andreas Faerber <afaerber@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
BND0-3, BNDCFGU, BNDCFGS, BNDSTATUS were not zeroed on reset, but they
should be (Intel Instruction Set Extensions Programming Reference
319433-015, pages 9-4 and 9-6). Same for YMM.
XCR0 should be reset to 1.
TSC and TSC_RESET were zeroed already by the memset, remove the explicit
assignments.
Cc: Andreas Faerber <afaerber@suse.de>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Now that we have a CPU object with a reset method, it is better to
keep the KVM reset close to the CPU reset. Using qemu_register_reset
as we do now keeps them far apart.
With this patch, PPC no longer calls the kvm_arch_ function, so
it can get removed there. Other arches call it from their CPU
reset handler, and the function gets an ARMCPU/X86CPU/S390CPU.
Note that ARM- and s390-specific functions are called kvm_arm_*
and kvm_s390_*, while x86-specific functions are called kvm_arch_*.
That follows the convention used by the different architectures.
Changing that is the topic of a separate patch.
Reviewed-by: Gleb Natapov <gnatapov@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Instead of manually calling cpu_x86_set_cpl() when the CPL changes,
check for CPL changes on calls to cpu_x86_load_seg_cache(R_CS). Every
location that called cpu_x86_set_cpl() also called
cpu_x86_load_seg_cache(R_CS), so cpu_x86_set_cpl() is no longer
required.
This fixes the SMM handler code as it was not setting/restoring the
CPL level manually.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The cpu_x86_load_seg_cache() function inspects eflags, so make sure
all changes to eflags are done prior to loading the segment caches.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The cpu_x86_load_seg_cache() function inspects cr0 and eflags, so make
sure all changes to eflags and cr0 are done prior to loading the
segment caches.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The svm_load_seg_cache() function calls cpu_x86_load_seg_cache() which
inspects env->eflags. So, make sure all changes to eflags are done
prior to loading the segment cache.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Older Intel manuals (pre-2010) and current AMD manuals describe Z as
undefined, but newer Intel manuals describe Z as unchanged.
Cc: qemu-stable@nongnu.org
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Using error_is_set(ERRP) to find out whether a function failed is
either wrong, fragile, or unnecessarily opaque. It's wrong when ERRP
may be null, because errors go undetected when it is. It's fragile
when proving ERRP non-null involves a non-local argument. Else, it's
unnecessarily opaque (see commit 84d18f0).
I guess the error_is_set(errp) in the ObjectProperty set() methods are
merely fragile right now, because I can't find a call chain that
passes a null errp argument.
Make the code more robust and more obviously correct: receive the
error in a local variable, then propagate it through the parameter.
Signed-off-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
The subsection already exists in one well-known enterprise Linux
distribution, but for some strange reason the fields were swapped
when forward-porting the patch to upstream.
Limit headaches for said enterprise Linux distributor when the
time will come to rebase their version of QEMU.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-id: 1396452782-21473-1-git-send-email-pbonzini@redhat.com
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Linux guests, when using more than 4GB of RAM, may end up using 1GB pages
to store (kernel) data. When this happens, we're unable to debug a running
Linux kernel with GDB:
(gdb) p node_data[0]->node_id
Cannot access memory at address 0xffff88013fffd3a0
(gdb)
GDB returns this error because x86_cpu_get_phys_page_debug() doesn't support
translating 1GB pages in IA-32e paging mode and returns an error to GDB.
This commit adds support for 1GB page translation for IA32e paging.
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Add 'U' suffixes where necessary to avoid (1 << 31) which
shifts left into the sign bit, which is undefined behaviour.
Add the suffix also for other constants in the same groupings
even if they don't shift into bit 31, for consistency.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
This fixes warnings from the static code analysis (smatch).
Signed-off-by: Stefan Weil <sw@weilnetz.de>
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
Most targets were using offsetof(CPUFooState, breakpoints) to determine
how much of CPUFooState to clear on reset. Use the next field after
CPU_COMMON instead, if any, or sizeof(CPUFooState) otherwise.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Note that while such functions may exist both for *-user and softmmu,
only *-user uses the CPUState hook, while softmmu reuses the prototype
for calling it directly.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Adapt the X86CPU implementation to suit the generic hook.
This involves a cleanup of error handling to cope with NULL errp.
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Register separate QOM types for each x86 CPU model.
This will allow management code to more easily probe what each CPU model
provides, by simply creating objects using the appropriate class name,
without having to restart QEMU.
This also allows us to eliminate the qdev_prop_set_globals_for_type()
hack to set CPU-model-specific global properties.
Instead of creating separate class_init functions for each class, I just
used class_data to store a pointer to the X86CPUDefinition struct for
each CPU model. This should make the patch shorter and easier to review.
Later we can gradually convert each X86CPUDefinition field to lists of
per-class property defaults.
The "host" CPU model is special, as the feature flags depend on KVM
being initialized. So it has its own class_init and instance_init
function, and feature flags are set on instance_init instead of
class_init.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Tested-by: Eduardo Habkost <ehabkost@redhat.com>
[AF: Limit the host CPU type to CONFIG_KVM as build fix]
Signed-off-by: Andreas Färber <afaerber@suse.de>
When on KVM mode, enable x2apic by default on all CPU models.
Normally we try to keep the CPU model definitions as close as the real
CPUs as possible, but x2apic can be emulated by KVM without host CPU
support for x2apic, and it improves performance by reducing APIC access
overhead. x2apic emulation is available on KVM since 2009 (Linux
2.6.32-rc1), there's no reason for not enabling x2apic by default when
running KVM.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Instead of the feature-specific disable_kvm_pv_eoi() function, create a
more general function that can be used to disable other feature bits in
machine-type compat code.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
We will later make the KVM-specific code affect other feature words,
too.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Some of my recent changes introduced variable declarations in the middle
of code blocks.
Fix the code so that it compiles without warnings when using
-Wdeclaration-after-statement.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
As the new X86CPU subclass code is going to change lots of the code
invoving x86_def_t, let's rename the struct to match coding style first.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
As we will initialize the X86CPU fields on instance_init eventually,
move the code that initializes the X86CPU data based on the CPU model
name closer to the object_new() call.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
There isn't any kind of "registration" involved in cpu_x86_register()
anymore: it is simply looking up a CPU model name and loading the model
definition data into the X86CPU object. Rename it to x86_cpu_load_def()
to reflect what it does.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Default to false.
Tidy variable naming and inline cast uses while at it.
Tested-by: Jia Liu <proljc@gmail.com> (or32)
Signed-off-by: Andreas Färber <afaerber@suse.de>
Commits fdfba1a298,
f606604f1c and
2c17449b30 added usages of ENV_GET_CPU()
macro in target-specific code.
Use x86_env_get_cpu() or reuse existing X86CPU variable instead.
Cc: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Cc: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Andreas Färber <afaerber@suse.de>
* remotes/qmp-unstable/queue/qmp:
tests: test-qmp-commands: Fix double free
qapi script: do not add "_" for every capitalized char in enum
qapi script: do not allow string discriminator
qapi: convert BlockdevOptions to use enum discriminator
qapi script: support enum type as discriminator in union
qapi script: use same function to generate enum string
qapi script: code move for generate_enum_name()
qapi script: check correctness of union
qapi script: remember line number in schema parsing
qapi script: add check for duplicated key
qapi script: remember explicitly defined enum values
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
* remotes/kvm/uq/master:
target-i386: bugfix of Intel MPX
file_ram_alloc: unify mem-path,mem-prealloc error handling
kvm-all: exit in case max vcpus exceeded
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Now "enum AIOContext" will generate AIO_CONTEXT instead of A_I_O_CONTEXT,
"X86CPU" will generate X86_CPU instead of X86_C_P_U.
Signed-off-by: Wenchao Xia <wenchaoqemu@gmail.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Reviewed-by: Markus Armbruster <armbru@redhat.com>
Signed-off-by: Luiz Capitulino <lcapitulino@redhat.com>
The correct size of cpuid 0x0d sub-leaf 4 is 0x40, not 0x10.
This is confirmed by Anvin H Peter and Mallick Asit K.
Signed-off-by: Liu Jinsong <jinsong.liu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Asit K Mallick <asit.k.mallick@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Liu, Jinsong <jinsong.liu@intel.com>
* remotes/qmp-unstable/queue/qmp: (32 commits)
qapi: Add missing null check to opts_start_struct()
qapi: Clean up superfluous null check in qapi_dealloc_type_str()
qapi: Clean up null checking in generated visitors
qapi: Drop unused code in qapi-commands.py
qapi: Drop nonsensical header guard in generated qapi-visit.c
qapi: Fix licensing of scripts
tests/qapi-schema: Cover flat union types
tests/qapi-schema: Cover union types with base
tests/qapi-schema: Cover complex types with base
tests/qapi-schema: Cover anonymous union types
tests/qapi-schema: Cover simple argument types
tests/qapi-schema: Cover optional command arguments
tests/qapi-schema: Actually check successful QMP command response
monitor: Remove left-over code in do_info_profile.
qerror: Improve QERR_DEVICE_NOT_ACTIVE message
qmp: Check for returned data from __json_read in get_events
dump: add 'query-dump-guest-memory-capability' command
Define the architecture for compressed dump format
dump: make kdump-compressed format available for 'dump-guest-memory'
dump: add API to write dump pages
...
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
We were loading 16 bytes for both single and double-precision
scalar comparisons.
Reported-by: Alexander Bluhm <bluhm@openbsd.org>
Signed-off-by: Richard Henderson <rth@twiddle.net>
When we restore the mxcsr register with FXRSTOR, or set it with gdb,
we need to update the various SSE status flags in CPUX86State
Reported-by: Richard Purdie <richard.purdie@linuxfoundation.org>
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Parity should be set for a zero result.
Cc: qemu-stable@nongnu.org
Reviewed-by: Paolo Bonzini <pbonzini@redhat.com>
Reviewed-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Commit 1b90d56e changed the implementation of in/out imm to not assign
the accessed port number to cpu_T[0] as it appeared unnecessary.
However, currently gen_check_io() makes use of cpu_T[0] to implement the
I/O bitmap checks, so it's in fact still used and the change broke the
check, leading to #GP in legitimate cases (and probably also allowing
access to ports that shouldn't be allowed).
This patch reintroduces the missing assignment for these cases.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
As we will not have a cpu_x86_find_by_name() function anymore,
move the KVM default-vendor hack to instance_init.
Unfortunately we can't move that code to class_init because it depends
on KVM being initialized.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
As eventually the x86_def_t data is going to be provided by the CPU
class, it's better to not touch it, and handle the special cases on the
X86CPU object itself.
Current behavior of the code should stay exactly the same.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The compiler is already able to eliminate the kvm_arch_get_supported_cpuid()
calls in kvm_cpu_fill_host() and filter_features_for_kvm(), so we can
eliminate the CONFIG_KVM #ifdefs there.
Also, kvm_cpu_fill_host() and host_cpuid() don't need to check
CONFIG_KVM, as they don't have any KVM-specific function calls.
Tested to build successfully with CONFIG_KVM disabled, using the
following CFLAGS combinations: "-DNDEBUG", "-DNDEBUG -O', "-DNDEBUG
-O0", "-DNDEBUG -O1", "-DNDEBUG -O2".
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
http://msdn.microsoft.com/en-us/library/windows/hardware/ff541625%28v=vs.85%29.aspx
This code is generic for activating reference time counter or virtual reference time stamp counter
Signed-off-by: Vadim Rozenfeld <vrozenfe@redhat.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
The MS docs specify HV_X64_MSR_HYPERCALL as a mandatory interface,
thus we must provide the MSRs even if the user only specified
features that, like relaxed timing, in principle don't require them.
And the MSRs are only there if the hypervisor has KVM_CAP_HYPERV.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
kvm_arch_init_vcpu's initialization of the KVM leaves at 0x40000100
is broken, because KVM_CPUID_FEATURES is left at 0x40000001. Move
it to 0x40000101 if Hyper-V is enabled.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
We don't need the ft[] array on kvm_check_features_against_host()
anymore, as we can simply use the feature_word_info[] array, that has
everything we need.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Now that the kvm_cpu_fill_host() code is simplified, we can simply set
the feature word array using a simple loop.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Reorder the code so all the code that sets x86_cpu_def->features is at
the end of the function.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
There's no need to check CPU xlevel2 before calling
kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX), because:
* The kernel won't return any entry for 0xC0000000 if host CPU vendor
is not Centaur (See kvm_dev_ioctl_get_supported_cpuid() on the kernel
code)
* Similarly, the kernel won't return any entry for 0xC0000001 if
CPUID[0xC0000000].EAX is < 0xC0000001
* kvm_arch_get_supported_cpuid() will return 0 if no entry is returned
by the kernel for the requested leaf
For similar reasons, we can simply set x86_cpu_def->xlevel2 directly
instead of making it conditional, because it will be set to 0 CPU vendor
is not Centaur.
This will simplify the kvm_cpu_fill_host() code a little.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
[Remove unparseable comment. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
There's no need to check CPU vendor before calling
kvm_arch_get_supported_cpuid(s, 0xC0000000, 0, R_EAX), because:
* The kernel won't return any entry for 0xC0000000 if host CPU vendor
is not Centaur (See kvm_dev_ioctl_get_cpuid() on the kernel code);
* kvm_arch_get_supported_cpuid() will return 0 if no entry is returned
by the kernel for the requested leaf.
This will simplify the kvm_cpu_fill_host() code a little.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
There's no need to check level (CPUID[0].EAX) before calling
kvm_arch_get_supported_cpuid(s, 0x7, 0, R_EBX), because:
* The kernel won't return any entry for CPUID 7 if CPUID[0].EAX is < 7
on the host (See kvm_dev_ioctl_get_cpuid() on the kernel code);
* kvm_arch_get_supported_cpuid() will return 0 if no entry is returned
by the kernel for the requested leaf.
This will simplify the kvm_cpu_fill_host() code a little.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Those host_cpuid() calls are useless. They are leftovers from when the
old code using host_cpuid() was removed.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* qemu-kvm/uq/master:
kvm: always update the MPX model specific register
KVM: fix addr type for KVM_IOEVENTFD
KVM: Retry KVM_CREATE_VM on EINTR
mempath prefault: fix off-by-one error
kvm: x86: Separately write feature control MSR on reset
roms: Flush icache when writing roms to guest memory
target-i386: clear guest TSC on reset
target-i386: do not special case TSC writeback
target-i386: Intel MPX
Conflicts:
exec.c
aliguori: fix trivial merge conflict in exec.c
Signed-off-by: Anthony Liguori <aliguori@amazon.com>
The original patch from Liu Jinsong restricted them to reset or full
state updates, but that's unnecessary (and wrong) since the BNDCFGS
MSR has no side effects.
Cc: Liu Jinsong <jinsong.liu@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
