This replaces the feature-bit fields on both X86CPU and x86_def_t
structs with an array.
With this, we will be able to simplify code that simply does the same
operation on all feature words (e.g. kvm_check_features_against_host(),
filter_features_for_kvm(), add_flagname_to_bitmaps(), CPU feature-bit
property lookup/registration, and the proposed "feature-words" property)
The following field replacements were made on X86CPU and x86_def_t:
(cpuid_)features -> features[FEAT_1_EDX]
(cpuid_)ext_features -> features[FEAT_1_ECX]
(cpuid_)ext2_features -> features[FEAT_8000_0001_EDX]
(cpuid_)ext3_features -> features[FEAT_8000_0001_ECX]
(cpuid_)ext4_features -> features[FEAT_C000_0001_EDX]
(cpuid_)kvm_features -> features[FEAT_KVM]
(cpuid_)svm_features -> features[FEAT_SVM]
(cpuid_)7_0_ebx_features -> features[FEAT_7_0_EBX]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Add appropriate spaces around operators, and break line where it needs
to be broken to allow feature-words array to be introduced without
having too-long lines.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Read and write steal time MSR, so that reporting is functional across
migration.
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Many of these should be cleaned up with proper qdev-/QOM-ification.
Right now there are many catch-all headers in include/hw/ARCH depending
on cpu.h, and this makes it necessary to compile these files per-target.
However, fixing this does not belong in these patches.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Both fields are used in VMState, thus need to be moved together.
Explicitly zero them on reset since they were located before
breakpoints.
Pass PowerPCCPU to kvmppc_handle_halt().
Signed-off-by: Andreas Färber <afaerber@suse.de>
* qemu-kvm/uq/master:
target-i386: kvm: prevent buffer overflow if -cpu foo, [x]level is too big
vmxcap: bit 9 of VMX_PROCBASED_CTLS2 is 'virtual interrupt delivery'
Conflicts:
target-i386/kvm.c
Trivial merge resolution due to lack of context.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Stack corruption may occur if too big 'level' or 'xlevel' values passed
on command line with KVM enabled, due to limited size of cpuid_data
in kvm_arch_init_vcpu().
reproduces with:
qemu -enable-kvm -cpu qemu64,level=4294967295
or
qemu -enable-kvm -cpu qemu64,xlevel=4294967295
Check if there is space in cpuid_data before passing it to cpu_x86_cpuid()
or abort() if there is not space.
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Andreas Faerber <afaerber@suse.de>
Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
The CPU ID in KVM is supposed to be the APIC ID, so change the
KVM_CREATE_VCPU call to match it. The current behavior didn't break
anything yet because today the APIC ID is assumed to be equal to the CPU
index, but this won't be true in the future.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-by: Marcelo Tosatti <mtosatti@redhat.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
This will allow each architecture to define how the VCPU ID is set on
the KVM_CREATE_VCPU ioctl call.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Acked-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Andreas Färber <afaerber@suse.de>
Various header files rely on qemu-char.h including qemu-config.h or
main-loop.h, but they really do not need qemu-char.h at all (particularly
interesting is the case of the block layer!). Clean this up, and also
add missing inclusions of qemu-char.h itself.
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
CPUID.7.0.EBX[1]=1 indicates IA32_TSC_ADJUST MSR 0x3b is supported
Basic design is to emulate the MSR by allowing reads and writes to the
hypervisor vcpu specific locations to store the value of the emulated MSRs.
In this way the IA32_TSC_ADJUST value will be included in all reads to
the TSC MSR whether through rdmsr or rdtsc.
As this is a new MSR that the guest may access and modify its value needs
to be migrated along with the other MRSs. The changes here are specifically
for recognizing when IA32_TSC_ADJUST is enabled in CPUID and code added
for migrating its value.
Signed-off-by: Will Auld <will.auld@intel.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Pass around CPUArchState instead of using global cpu_single_env.
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
* qemu-kvm/uq/master: (28 commits)
update-linux-headers.sh: Handle new kernel uapi/ directories
target-i386: kvm_cpu_fill_host: use GET_SUPPORTED_CPUID
target-i386: cpu: make -cpu host/check/enforce code KVM-specific
target-i386: make cpu_x86_fill_host() void
Emulate qemu-kvms -no-kvm option
Issue warning when deprecated -tdf option is used
Issue warning when deprecated drive parameter boot=on|off is used
Use global properties to emulate -no-kvm-pit-reinjection
Issue warning when deprecated -no-kvm-pit is used
Use machine options to emulate -no-kvm-irqchip
cirrus_vga: allow configurable vram size
target-i386: Add missing kvm cpuid feature name
i386: cpu: add missing CPUID[EAX=7,ECX=0] flag names
i386: kvm: filter CPUID leaf 7 based on GET_SUPPORTED_CPUID, too
i386: kvm: reformat filter_features_for_kvm() code
i386: kvm: filter CPUID feature words earlier, on cpu.c
i386: kvm: mask cpuid_ext4_features bits earlier
i386: kvm: mask cpuid_kvm_features earlier
i386: kvm: x2apic is not supported without in-kernel irqchip
i386: kvm: set CPUID_EXT_TSC_DEADLINE_TIMER on kvm_arch_get_supported_cpuid()
...
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
cpu.c contains the code that will check if all requested CPU features
are available, so the filtering of KVM features must be there, so we can
implement "check" and "enforce" properly.
The only point where kvm_arch_init_vcpu() is called on i386 is:
- cpu_x86_init()
- x86_cpu_realize() (after cpu_x86_register() is called)
- qemu_init_vcpu()
- qemu_kvm_start_vcpu()
- qemu_kvm_thread_fn() (on a new thread)
- kvm_init_vcpu()
- kvm_arch_init_vcpu()
With this patch, the filtering will be done earlier, at:
- cpu_x86_init()
- cpu_x86_register() (before x86_cpu_realize() is called)
Also, the KVM CPUID filtering will now be done at the same place where
the TCG CPUID feature filtering is done. Later, the code can be changed
to use the same filtering code for the "check" and "enforce" modes, as
now the cpu.c code knows exactly which CPU features are going to be
exposed to the guest (and much earlier).
One thing I was worrying about when doing this is that
kvm_arch_get_supported_cpuid() depends on kvm_irqchip_in_kernel(), and
maybe the 'kvm_kernel_irqchip' global variable wasn't initialized yet at
CPU creation time. But kvm_kernel_irqchip is initialized during
kvm_init(), that is called very early (much earlier than the machine
init function), and kvm_init() is already a requirement to run the
GET_SUPPORTED_CPUID ioctl() (as kvm_init() initializes the kvm_state
global variable).
Side note: it would be nice to keep KVM-specific code inside kvm.c. The
problem is that properly implementing -cpu check/enforce code (that's
inside cpu.c) depends directly on the feature bit filtering done using
kvm_arch_get_supported_cpuid(). Currently -cpu check/enforce is broken
because it simply uses the host CPU feature bits instead of
GET_SUPPORTED_CPUID, and we need to fix that.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This way all the filtering by GET_SUPPORTED_CPUID is being done at the
same place in the code.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Instead of masking the KVM feature bits very late (while building the
KVM_SET_CPUID2 data), mask it out on env->cpuid_kvm_features, at the
same point where the other feature words are masked out.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This is necessary so that x2apic is not improperly enabled when the
in-kernel irqchip is disabled.
This won't generate a warning with "-cpu ...,check" because the current
check/enforce code is broken (it checks the host CPU data directly,
instead of using kvm_arch_get_supported_cpuid()), but it will be
eventually fixed to properly report the missing x2apic flag.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This moves the CPUID_EXT_TSC_DEADLINE_TIMER CPUID flag hacking from
kvm_arch_init_vcpu() to kvm_arch_get_supported_cpuid().
Full git grep for kvm_arch_get_supported_cpuid:
kvm.h:uint32_t kvm_arch_get_supported_cpuid(KVMState *env, uint32_t function,
target-i386/cpu.c: x86_cpu_def->cpuid_7_0_ebx_features = kvm_arch_get_supported_cpuid(kvm_state, 0x7, 0, R_EBX);
target-i386/cpu.c: *eax = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EAX);
target-i386/cpu.c: *ebx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EBX);
target-i386/cpu.c: *ecx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_ECX);
target-i386/cpu.c: *edx = kvm_arch_get_supported_cpuid(s, 0xA, count, R_EDX);
target-i386/cpu.c: *eax = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EAX);
target-i386/cpu.c: *ebx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EBX);
target-i386/cpu.c: *ecx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_ECX);
target-i386/cpu.c: *edx = kvm_arch_get_supported_cpuid(s, 0xd, count, R_EDX);
target-i386/kvm.c:uint32_t kvm_arch_get_supported_cpuid(KVMState *s, uint32_t function,
target-i386/kvm.c: cpuid_1_edx = kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
target-i386/kvm.c: env->cpuid_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_EDX);
* target-i386/kvm.c: env->cpuid_ext_features &= kvm_arch_get_supported_cpuid(s, 1, 0, R_ECX);
target-i386/kvm.c: env->cpuid_ext2_features &= kvm_arch_get_supported_cpuid(s, 0x80000001,
target-i386/kvm.c: env->cpuid_ext3_features &= kvm_arch_get_supported_cpuid(s, 0x80000001,
target-i386/kvm.c: env->cpuid_svm_features &= kvm_arch_get_supported_cpuid(s, 0x8000000A,
target-i386/kvm.c: kvm_arch_get_supported_cpuid(s, KVM_CPUID_FEATURES, 0, R_EAX);
target-i386/kvm.c: kvm_arch_get_supported_cpuid(s, 0xC0000001, 0, R_EDX);
Note that there is only one call for CPUID[1].ECX above (*), and it is
the one that gets hacked to include CPUID_EXT_TSC_DEADLINE_TIMER, so we
can simply make kvm_arch_get_supported_cpuid() set it, to let the rest
of the code know the flag can be safely set by QEMU.
One thing I was worrying about when doing this is that now
kvm_arch_get_supported_cpuid() depends on kvm_irqchip_in_kernel(). But
the 'kvm_kernel_irqchip' global variable is initialized during
kvm_init(), that is called very early, and kvm_init() is already a
requirement to run the GET_SUPPORTED_CPUID ioctl() (as kvm_init() is the
function that initializes the 'kvm_state' global variable).
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Additional fixups will be added, and making them a single 'if/else if'
chain makes it clearer than two nested switch statements.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
The reg switch will be moved to a separate function, so store the entry
pointer in a variable.
No behavior change, just code movement.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Instead of a function-specific has_kvm_features variable, simply use a
"found" variable that will be checked in case we have to use the legacy
get_para_features() interface.
No behavior change, just code cleanup.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
The for loop will become a separate function, so clean it up so it can
become independent from the bit hacking for R_EDX.
No behavior change[1], just code movement.
[1] Well, only if the kernel returned CPUID leafs 1 or 0x80000001 as
unsupported, but there's no kernel version that does that.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Change return type to bool, move to include/qemu/cpu.h and
add documentation.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Reviewed-by: Igor Mammedov <imammedo@redhat.com>
[AF: Updated new caller qemu_in_vcpu_thread()]
target_phys_addr_t is unwieldly, violates the C standard (_t suffixes are
reserved) and its purpose doesn't match the name (most target_phys_addr_t
addresses are not target specific). Replace it with a finger-friendly,
standards conformant hwaddr.
Outstanding patchsets can be fixed up with the command
git rebase -i --exec 'find -name "*.[ch]"
| xargs s/target_phys_addr_t/hwaddr/g' origin
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Instea of using a hardcoded hex constant, define CPUID_EXT2_AMD_ALIASES
as the set of CPUID[8000_0001].EDX bits that on AMD are the same as the
bits of CPUID[1].EDX.
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-By: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Don Slutz <Don@CloudSwitch.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
Bit 10 of CPUID[8000_0001].EDX is not defined as an alias of
CPUID[1].EDX[10], so do not duplicate it on
kvm_arch_get_supported_cpuid().
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Reviewed-By: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Don Slutz <Don@CloudSwitch.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
These helpers abstract the interaction of upcoming pci-assign with the
KVM kernel services. Put them under i386 only as other archs will
implement device pass-through via VFIO and not this classic interface.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Acked-by: Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Support get/set of new PV EOI MSR, for migration.
Add an optional section for MSR value - send it
out in case MSR was changed from the default value (0).
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Don't assume having an in-kernel irqchip means that GSI
routing is enabled.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
Decouple another x86-specific assumption about what irqchips imply.
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Avi Kivity <avi@redhat.com>
