Commit graph

19 commits

Author SHA1 Message Date
Laurent Vivier 0aecb15f3b
accel/tcg: add size paremeter in tlb_fill()
The MC68040 MMU provides the size of the access that
triggers the page fault.

This size is set in the Special Status Word which
is written in the stack frame of the access fault
exception.

So we need the size in m68k_cpu_unassigned_access() and
m68k_cpu_handle_mmu_fault().

To be able to do that, this patch modifies the prototype of
handle_mmu_fault handler, tlb_fill() and probe_write().
do_unassigned_access() already includes a size parameter.

This patch also updates handle_mmu_fault handlers and
tlb_fill() of all targets (only parameter, no code change).

Backports commit 98670d47cd8d63a529ff230fd39ddaa186156f8c from qemu
2018-03-06 10:56:34 -05:00
Yang Zhong 258b885b17
x86/cpu: Enable new SSE/AVX/AVX512 cpu features
Intel IceLake cpu has added new cpu features,AVX512_VBMI2/GFNI/
VAES/VPCLMULQDQ/AVX512_VNNI/AVX512_BITALG. Those new cpu features
need expose to guest VM.

The bit definition:
CPUID.(EAX=7,ECX=0):ECX[bit 06] AVX512_VBMI2
CPUID.(EAX=7,ECX=0):ECX[bit 08] GFNI
CPUID.(EAX=7,ECX=0):ECX[bit 09] VAES
CPUID.(EAX=7,ECX=0):ECX[bit 10] VPCLMULQDQ
CPUID.(EAX=7,ECX=0):ECX[bit 11] AVX512_VNNI
CPUID.(EAX=7,ECX=0):ECX[bit 12] AVX512_BITALG

The release document ref below link:
https://software.intel.com/sites/default/files/managed/c5/15/\
architecture-instruction-set-extensions-programming-reference.pdf

Backports commit aff9e6e46a343e1404498be4edd03db1112f0950 from qemu
2018-03-05 14:19:37 -05:00
Eduardo Habkost 6fbabb4bce
i386: Add FEAT_8000_0008_EBX CPUID feature word
Add the new feature word and the "ibpb" feature flag.

Based on a patch by Paolo Bonzini.

Backports commit 1ade973f5202404e772aae7b1acd331270d246dc from qemu
2018-03-05 13:48:30 -05:00
Eduardo Habkost 7bee95ad28
i386: Add spec-ctrl CPUID bit
Add the feature name and a CPUID_7_0_EDX_SPEC_CTRL macro.

Backports commit 803d42fa65a371f7bb13180a5953299dc3a160e0 from qemu
2018-03-05 13:48:30 -05:00
Paolo Bonzini 7cf98b1a6e
i386: Add support for SPEC_CTRL MSR
Backports commit cb2637a5ae1f4e61af423395300548f14e8a2e2a from qemu
2018-03-05 13:48:29 -05:00
Gonglei ce71be5c05
i386/cpu/hyperv: support over 64 vcpus for windows guests
Starting with Windows Server 2012 and Windows 8, if
CPUID.40000005.EAX contains a value of -1, Windows assumes specific
limit to the number of VPs. In this case, Windows Server 2012
guest VMs may use more than 64 VPs, up to the maximum supported
number of processors applicable to the specific Windows
version being used.

https://docs.microsoft.com/en-us/virtualization/hyper-v-on-windows/reference/tlfs

For compatibility, Let's introduce a new property for X86CPU,
named "x-hv-max-vps" as Eduardo's suggestion, and set it
to 0x40 before machine 2.10.

(The "x-" prefix indicates that the property is not supposed to
be a stable user interface.)

Backports relevant parts of commit 6c69dfb67e84747cf071958594d939e845dfcc0c from qemu
2018-03-05 00:00:53 -05:00
Daniel P. Berrange abf3c71af2
i386: expose TCGTCGTCGTCG in the 0x40000000 CPUID leaf
Currently when running KVM, we expose "KVMKVMKVM\0\0\0" in
the 0x40000000 CPUID leaf. Other hypervisors (VMWare,
HyperV, Xen, BHyve) all do the same thing, which leaves
TCG as the odd one out.

The CPUID signature is used by software to detect which
virtual environment they are running in and (potentially)
change behaviour in certain ways. For example, systemd
supports a ConditionVirtualization= setting in unit files.
The virt-what command can also report the virt type it is
running on

Currently both these apps have to resort to custom hacks
like looking for 'fw-cfg' entry in the /proc/device-tree
file to identify TCG.

This change thus proposes a signature "TCGTCGTCGTCG" to be
reported when running under TCG.

To hide this, the -cpu option tcg-cpuid=off can be used.

Backports commits 4ed3d478c63dc65a02eba774c35116618ea5ff10 and  1ce36bfe6424243082d3d7c2330e1a0a4ff72a43 from qemu
2018-03-03 22:56:32 -05:00
Yang Zhong a16bcbdac0
target/i386: add the tcg_enabled() in target/i386/
Add the tcg_enabled() where the x86 target needs to disable
TCG-specific code.

Backports commit 79c664f62d75cfba89a5bbe998622c8d5fdf833b from qemu
2018-03-03 21:56:31 -05:00
Yang Zhong 0c739344d3
target/i386: split cpu_set_mxcsr() and make cpu_set_fpuc() inline
Split the cpu_set_mxcsr() and make cpu_set_fpuc() inline with specific
tcg code.

Backports commit 1d8ad165b688759bbf00e40431ee9fde8817d190 from qemu
2018-03-03 21:52:29 -05:00
Yang Zhong 24225cb6fa
target/i386: make cpu_get_fp80()/cpu_set_fp80() static
Move cpu_get_fp80()/cpu_set_fp80() from fpu_helper.c to
machine.c because fpu_helper.c will be disabled if tcg is
disabled in the build.

Backports commit db573d2cf7ae6b5a4fc324be6f55e078fc218464 from qemu.
In unicorn's case, they can be moved into unicorn.c
2018-03-03 21:44:09 -05:00
Paolo Bonzini 741ff79e23
target/i386: use multiple CPU AddressSpaces
This speeds up SMM switches. Later on it may remove the need to take
the BQL, and it may also allow to reuse code between TCG and KVM.

Backports commit f8c45c6550b9ff1e1f0b92709ff3213a79870879 from qemu
2018-03-03 14:53:47 -05:00
Paolo Bonzini 710f393c13
target/i386: enable A20 automatically in system management mode
Ignore env->a20_mask when running in system management mode.

Backports commit c8bc83a4dd29a9a33f5be81686bfe6e2e628097b from qemu
2018-03-03 14:33:09 -05:00
Eduardo Habkost e71c7b7819
i386: Don't override -cpu options on -cpu host/max
The existing code for "host" and "max" CPU models overrides every
single feature in the CPU object at realize time, even the ones
that were explicitly enabled or disabled by the user using
"feat=on" or "feat=off", while features set using +feat/-feat are
kept.

This means "-cpu host,+invtsc" works as expected, while
"-cpu host,invtsc=on" doesn't.

This was a known bug, already documented in a comment inside
x86_cpu_expand_features(). What makes this bug worse now is that
libvirt 3.0.0 and newer now use "feat=on|off" instead of
+feat/-feat when it detects a QEMU version that supports it (see
libvirt commit d47db7b16dd5422c7e487c8c8ee5b181a2f9cd66).

Change the feature property getter/setter to set a
env->user_features field, to keep track of features that were
explicitly changed using QOM properties. Then make the
max_features code not override user features when handling "-cpu
host" and "-cpu max".

This will also allow us to remove the plus_features/minus_features
hack in the future, but I plan to do that after 2.9.0 is
released.

Backports commit d4a606b38b5d4b3689b86cc1575908e82179ecfb from qemu
2018-03-02 14:22:45 -05:00
Eduardo Habkost f865b17639
i386: host_vendor_fms() helper function
Helper function for code that needs to check the host CPU
vendor/family/model/stepping values.

Backports commit 20271d484069f154fb262507e63adc3a37e885d2 from qemu
2018-03-02 12:51:44 -05:00
Paolo Bonzini bc7a9ccfbd
target-i386: defer VMEXIT to do_interrupt
Paths through the softmmu code during code generation now need to be audited
to check for double locking of tb_lock. In particular, VMEXIT can take tb_lock
through cpu_vmexit -> cpu_x86_update_cr4 -> tlb_flush.

To avoid this, split VMEXIT delivery in two parts, similar to what is done with
exceptions. cpu_vmexit only records the VMEXIT exit code and information, and
cc->do_interrupt can then deliver it when it is safe to take the lock.

Backports commit 10cde894b63146139f981857e4eedf756fa53dcb from qemu
2018-03-02 12:49:18 -05:00
Alex Bennée a01496e6d9
target/i386/cpu.h: declare TCG_GUEST_DEFAULT_MO
This suppresses the incorrect warning when forcing MTTCG for x86
guests on x86 hosts. A future patch will still warn when
TARGET_SUPPORT_MTTCG hasn't been defined for the guest (which is still
pending for x86).

Backports commit 72c1701f62e8d44eb24a0583a958edc280105455 from qemu
2018-03-02 12:43:37 -05:00
Eduardo Habkost be606acff9
i386: Rename X86CPU::host_features to X86CPU::max_features
Rename the field and add a small comment to make its purpose
clearer.

Backports commit 44bd8e530661be1d22ae0f461a5c9bdbcc3847ec from qemu
2018-03-02 10:51:40 -05:00
He Chen b37fa358f3
x86: add AVX512_VPOPCNTDQ features
AVX512_VPOPCNTDQ: Vector POPCNT instructions for word and qwords.
variable precision.

Backports commit f77543772dcd38fa438470d9b80bafbd3a3ebbd7 from qemu
2018-03-01 23:44:32 -05:00
Thomas Huth b2f1326437
Move target-* CPU file into a target/ folder
We've currently got 18 architectures in QEMU, and thus 18 target-xxx
folders in the root folder of the QEMU source tree. More architectures
(e.g. RISC-V, AVR) are likely to be included soon, too, so the main
folder of the QEMU sources slowly gets quite overcrowded with the
target-xxx folders.
To disburden the main folder a little bit, let's move the target-xxx
folders into a dedicated target/ folder, so that target-xxx/ simply
becomes target/xxx/ instead.

Backports commit fcf5ef2ab52c621a4617ebbef36bf43b4003f4c0 from qemu
2018-03-01 22:50:58 -05:00
Renamed from qemu/target-i386/cpu.h (Browse further)