Commit Graph

357 Commits

Author SHA1 Message Date
Eduardo Habkost 7210a02c58 i386: Disable TOPOEXT by default on "-cpu host"
Enabling TOPOEXT is always allowed, but it can't be enabled
blindly by "-cpu host" because it may make guests crash if the
rest of the cache topology information isn't provided or isn't
consistent.

This addresses the bug reported at:
https://bugzilla.redhat.com/show_bug.cgi?id=1613277

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180809221852.15285-1-ehabkost@redhat.com>
Tested-by: Richard W.M. Jones <rjones@redhat.com>
Reviewed-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-08-16 13:43:01 -03:00
Wanpeng Li 7f710c32bb target-i386: adds PV_SEND_IPI CPUID feature bit
Adds PV_SEND_IPI CPUID feature bit.

Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Eduardo Habkost <ehabkost@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Wanpeng Li <wanpengli@tencent.com>
Message-Id: <1530526971-1812-1-git-send-email-wanpengli@tencent.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-08-16 13:43:01 -03:00
Robert Hoo 8a11c62da9 i386: Add new CPU model Icelake-{Server,Client}
New CPU models mostly inherit features from ancestor Skylake, while addin new
features: UMIP, New Instructions ( PCONIFIG (server only), WBNOINVD,
AVX512_VBMI2, GFNI, AVX512_VNNI, VPCLMULQDQ, VAES, AVX512_BITALG),
Intel PT and 5-level paging (Server only). As well as
IA32_PRED_CMD, SSBD support for speculative execution
side channel mitigations.

Note:
For 5-level paging, Guest physical address width can be configured, with
parameter "phys-bits". Unless explicitly specified, we still use its default
value, even for Icelake-Server cpu model.
At present, hold on expose IA32_ARCH_CAPABILITIES to guest, as 1) This MSR
actually presents more than 1 'feature', maintainers are considering expanding current
features presentation of only CPUIDs to MSR bits; 2) a reasonable default value
for MSR_IA32_ARCH_CAPABILITIES needs to settled first. These 2 are actully
beyond Icelake CPU model itself but fundamental. So split these work apart
and do it later.
https://lists.gnu.org/archive/html/qemu-devel/2018-07/msg00774.html
https://lists.gnu.org/archive/html/qemu-devel/2018-07/msg00796.html

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Message-Id: <1530781798-183214-6-git-send-email-robert.hu@linux.intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-08-16 13:43:01 -03:00
Robert Hoo 59a80a19ca i386: Add CPUID bit for WBNOINVD
WBNOINVD: Write back and do not invalidate cache, enumerated by
CPUID.(EAX=80000008H, ECX=0):EBX[bit 9].

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Message-Id: <1530781798-183214-5-git-send-email-robert.hu@linux.intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-08-16 13:43:01 -03:00
Robert Hoo 5131dc433d i386: Add CPUID bit for PCONFIG
PCONFIG: Platform configuration, enumerated by CPUID.(EAX=07H, ECX=0):
EDX[bit18].

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Message-Id: <1530781798-183214-4-git-send-email-robert.hu@linux.intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-08-16 13:43:01 -03:00
Robert Hoo 3fc7c73139 i386: Add CPUID bit and feature words for IA32_ARCH_CAPABILITIES MSR
Support of IA32_PRED_CMD MSR already be enumerated by same CPUID bit as
SPEC_CTRL.

At present, mark CPUID_7_0_EDX_ARCH_CAPABILITIES unmigratable, per Paolo's
comment.

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Message-Id: <1530781798-183214-3-git-send-email-robert.hu@linux.intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-08-16 13:43:01 -03:00
Robert Hoo 8c80c99fcc i386: Add new MSR indices for IA32_PRED_CMD and IA32_ARCH_CAPABILITIES
IA32_PRED_CMD MSR gives software a way to issue commands that affect the state
of indirect branch predictors. Enumerated by CPUID.(EAX=7H,ECX=0):EDX[26].
IA32_ARCH_CAPABILITIES MSR enumerates architectural features of RDCL_NO and
IBRS_ALL. Enumerated by CPUID.(EAX=07H, ECX=0):EDX[29].

https://software.intel.com/sites/default/files/managed/c5/63/336996-Speculative-Execution-Side-Channel-Mitigations.pdf

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Message-Id: <1530781798-183214-2-git-send-email-robert.hu@linux.intel.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-08-16 13:43:01 -03:00
Paolo Bonzini 1d3db6bdbb i386: implement MSR_SMI_COUNT for TCG
This is trivial, so just do it.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-30 14:00:11 +02:00
Paolo Bonzini 990e0be260 i386: do not migrate MSR_SMI_COUNT on machine types <2.12
MSR_SMI_COUNT started being migrated in QEMU 2.12.  Do not migrate it
on older machine types, or the subsection causes a load failure for
guests that use SMM.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-30 14:00:11 +02:00
Eduardo Habkost 5f00335aec i386: Rename enum CacheType members
Rename DCACHE to DATA_CACHE and ICACHE to INSTRUCTION_CACHE.
This avoids conflict with Linux asm/cachectl.h macros and fixes
build failure on mips hosts.

Reported-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180717194010.30096-1-ehabkost@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Tested-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Babu Moger <babu.moger@amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-07-23 12:56:19 -03:00
Roman Kagan e9688fabc3 hyperv: ensure VP index equal to QEMU cpu_index
Hyper-V identifies vCPUs by Virtual Processor (VP) index which can be
queried by the guest via HV_X64_MSR_VP_INDEX msr.  It is defined by the
spec as a sequential number which can't exceed the maximum number of
vCPUs per VM.

It has to be owned by QEMU in order to preserve it across migration.

However, the initial implementation in KVM didn't allow to set this
msr, and KVM used its own notion of VP index.  Fortunately, the way
vCPUs are created in QEMU/KVM makes it likely that the KVM value is
equal to QEMU cpu_index.

So choose cpu_index as the value for vp_index, and push that to KVM on
kernels that support setting the msr.  On older ones that don't, query
the kernel value and assert that it's in sync with QEMU.

Besides, since handling errors from vCPU init at hotplug time is
impossible, disable vCPU hotplug.

This patch also introduces accessor functions to encapsulate the mapping
between a vCPU and its vp_index.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20180702134156.13404-3-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-16 16:58:16 +02:00
Roman Kagan 1b2013ea5d hyperv: rename vcpu_id to vp_index
In Hyper-V-related code, vCPUs are identified by their VP (virtual
processor) index.  Since it's customary for "vcpu_id" in QEMU to mean
APIC id, rename the respective variables to "vp_index" to make the
distinction clear.

Signed-off-by: Roman Kagan <rkagan@virtuozzo.com>
Message-Id: <20180702134156.13404-2-rkagan@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-16 16:58:16 +02:00
Viktor Prutyanov 46fac17dca dump: add kernel_gs_base to QEMU CPU state
This patch adds field with content of KERNEL_GS_BASE MSR to QEMU note in
ELF dump.

On Windows, if all vCPUs are running usermode tasks at the time the dump is
created, this can be helpful in the discovery of guest system structures
during conversion ELF dump to MEMORY.DMP dump.

Signed-off-by: Viktor Prutyanov <viktor.prutyanov@virtuozzo.com>
Message-Id: <20180714123000.11326-1-viktor.prutyanov@virtuozzo.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-16 16:13:34 +02:00
Greg Kurz 02693cc4f4 i386: fix '-cpu ?' output for host cpu type
Since commit d6dcc5583e, '-cpu ?' shows the description of the
X86_CPU_TYPE_NAME("max") for the host CPU model:

Enables all features supported by the accelerator in the current host

instead of the expected:

KVM processor with all supported host features

or

HVF processor with all supported host features

This is caused by the early use of kvm_enabled() and hvf_enabled() in
a class_init function. Since the accelerator isn't configured yet, both
helpers return false unconditionally.

A QEMU binary will only be compiled with one of these accelerators, not
both. The appropriate description can thus be decided at build time.

Signed-off-by: Greg Kurz <groug@kaod.org>
Message-Id: <153055056654.212317.4697363278304826913.stgit@bahia.lan>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-06 18:39:19 +02:00
Doug Gale 3afc969a6e i386/monitor.c: make addresses canonical for "info mem" and "info tlb"
Correct the output of the "info mem" and "info tlb" monitor commands to
correctly show canonical addresses.

In 48-bit addressing mode, the upper 16 bits of linear addresses are
equal to bit 47. In 57-bit addressing mode (LA57), the upper 7 bits of
linear addresses are equal to bit 56.

Signed-off-by: Doug Gale <doug16k@gmail.com>
Message-Id: <20180617084025.29198-1-doug16k@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-02 15:41:18 +02:00
Jan Kiszka fe441054bb target-i386: Add NPT support
This implements NPT suport for SVM by hooking into
x86_cpu_handle_mmu_fault where it reads the stage-1 page table. Whether
we need to perform this 2nd stage translation, and how, is decided
during vmrun and stored in hflags2, along with nested_cr3 and
nested_pg_mode.

As get_hphys performs a direct cpu_vmexit in case of NPT faults, we need
retaddr in that function. To avoid changing the signature of
cpu_handle_mmu_fault, this passes the value from tlb_fill to get_hphys
via the CPU state.

This was tested successfully via the Jailhouse hypervisor.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <567473a0-6005-5843-4c73-951f476085ca@web.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-02 15:41:18 +02:00
Philippe Mathieu-Daudé 6a4e0614c3 x86/cpu: Use definitions from "qemu/units.h"
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Acked-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180625124238.25339-4-f4bug@amsat.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-02 14:45:23 +02:00
Vitaly Kuznetsov 475120099d i386/kvm: add support for Hyper-V TLB flush
Add support for Hyper-V TLB flush which recently got added to KVM.

Just like regular Hyper-V we announce HV_EX_PROCESSOR_MASKS_RECOMMENDED
regardless of how many vCPUs we have. Windows is 'smart' and uses less
expensive non-EX Hypercall whenever possible (when it wants to flush TLB
for all vCPUs or the maximum vCPU index in the vCPU set requires flushing
is less than 64).

Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Message-Id: <20180610184927.19309-1-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-07-02 14:45:23 +02:00
Peter Maydell 109b25045b * "info mtree" improvements (Alexey)
* fake VPD block limits for SCSI passthrough (Daniel Barboza)
 * chardev and main loop fixes (Daniel Berrangé, Sergio, Stefan)
 * help fixes (Eduardo)
 * pc-dimm refactoring (David)
 * tests improvements and fixes (Emilio, Thomas)
 * SVM emulation fixes (Jan)
 * MemoryRegionCache fix (Eric)
 * WHPX improvements (Justin)
 * ESP cleanup (Mark)
 * -overcommit option (Michael)
 * qemu-pr-helper fixes (me)
 * "info pic" improvements for x86 (Peter)
 * x86 TCG emulation fixes (Richard)
 * KVM slot handling fix (Shannon)
 * Next round of deprecation (Thomas)
 * Windows dump format support (Viktor)
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Merge remote-tracking branch 'remotes/bonzini/tags/for-upstream' into staging

* "info mtree" improvements (Alexey)
* fake VPD block limits for SCSI passthrough (Daniel Barboza)
* chardev and main loop fixes (Daniel Berrangé, Sergio, Stefan)
* help fixes (Eduardo)
* pc-dimm refactoring (David)
* tests improvements and fixes (Emilio, Thomas)
* SVM emulation fixes (Jan)
* MemoryRegionCache fix (Eric)
* WHPX improvements (Justin)
* ESP cleanup (Mark)
* -overcommit option (Michael)
* qemu-pr-helper fixes (me)
* "info pic" improvements for x86 (Peter)
* x86 TCG emulation fixes (Richard)
* KVM slot handling fix (Shannon)
* Next round of deprecation (Thomas)
* Windows dump format support (Viktor)

# gpg: Signature made Fri 29 Jun 2018 12:03:05 BST
# gpg:                using RSA key BFFBD25F78C7AE83
# gpg: Good signature from "Paolo Bonzini <bonzini@gnu.org>"
# gpg:                 aka "Paolo Bonzini <pbonzini@redhat.com>"
# 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: (60 commits)
  tests/boot-serial: Do not delete the output file in case of errors
  hw/scsi: add VPD Block Limits emulation
  hw/scsi: centralize SG_IO calls into single function
  hw/scsi: cleanups before VPD BL emulation
  dump: add Windows live system dump
  dump: add fallback KDBG using in Windows dump
  dump: use system context in Windows dump
  dump: add Windows dump format to dump-guest-memory
  i386/cpu: make -cpu host support monitor/mwait
  kvm: support -overcommit cpu-pm=on|off
  hmp: obsolete "info ioapic"
  ioapic: support "info irq"
  ioapic: some proper indents when dump info
  ioapic: support "info pic"
  doc: another fix to "info pic"
  target-i386: Mark cpu_vmexit noreturn
  target-i386: Allow interrupt injection after STGI
  target-i386: Add NMI interception to SVM
  memory/hmp: Print owners/parents in "info mtree"
  WHPX: register for unrecognized MSR exits
  ...

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-06-29 12:30:29 +01:00
Michael S. Tsirkin 2266d44311 i386/cpu: make -cpu host support monitor/mwait
When guest CPU PM is enabled, and with -cpu host, expose the host CPU
MWAIT leaf in the CPUID so guest can make good PM decisions.

Note: the result is 100% CPU utilization reported by host as host
no longer knows that the CPU is halted.

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180622192148.178309-3-mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-29 13:02:47 +02:00
Michael S. Tsirkin 6f131f13e6 kvm: support -overcommit cpu-pm=on|off
With this flag, kvm allows guest to control host CPU power state.  This
increases latency for other processes using same host CPU in an
unpredictable way, but if decreases idle entry/exit times for the
running VCPU, so to use it QEMU needs a hint about whether host CPU is
overcommitted, hence the flag name.

Follow-up patches will expose this capability to guest
(using mwait leaf).

Based on a patch by Wanpeng Li <kernellwp@gmail.com> .

Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Message-Id: <20180622192148.178309-2-mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:37 +02:00
Peter Xu 0c8465440d hmp: obsolete "info ioapic"
Let's start to use "info pic" just like other platforms.  For now we
keep the command for a while so that old users can know what is the new
command to use.

Signed-off-by: Peter Xu <peterx@redhat.com>
Message-Id: <20171229073104.3810-6-peterx@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:37 +02:00
Jan Kiszka 50b3de6e5c target-i386: Mark cpu_vmexit noreturn
It calls cpu_loop_exit in system emulation mode (and should never be
called in user emulation mode).

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <6f4d44ffde55d074cbceb48309c1678600abad2f.1522769774.git.jan.kiszka@web.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:37 +02:00
Jan Kiszka df2518aa58 target-i386: Allow interrupt injection after STGI
We need to terminate the translation block after STGI so that pending
interrupts can be injected.

This fixes pending NMI injection for Jailhouse which uses "stgi; clgi"
to open a brief injection window.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <37939b244dda0e9cccf96ce50f2b15df1e48315d.1522769774.git.jan.kiszka@web.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:36 +02:00
Jan Kiszka 02f7fd25a4 target-i386: Add NMI interception to SVM
Check for SVM interception prior to injecting an NMI. Tested via the
Jailhouse hypervisor.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Message-Id: <c65877e9a011ee4962931287e59f502c482b8d0b.1522769774.git.jan.kiszka@web.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:36 +02:00
Justin Terry (VM) e7ca549fc8 WHPX: register for unrecognized MSR exits
Some variations of Linux kernels end up accessing MSR's that the Windows
Hypervisor doesn't implement which causes a GP to be returned to the guest.
This fix registers QEMU for unimplemented MSR access and globally returns 0 on
reads and ignores writes. This behavior is allows the Linux kernel to probe the
MSR with a write/read/check sequence it does often without failing the access.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <20180605221500.21674-2-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:36 +02:00
Justin Terry (VM) e1753a7e1d WHPX workaround bug in OSVW handling
Adds a workaround to an incorrect value setting
CPUID Fn8000_0001_ECX[bit 9 OSVW] = 1. This can cause a guest linux kernel
to panic when an issue to rdmsr C001_0140h returns 0. Disabling this feature
correctly allows the guest to boot without accessing the osv workarounds.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <20180605221500.21674-1-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:36 +02:00
Paolo Bonzini 93d1499c81 whpx: commit missing file
Not included by mistake in commit 327fccb288.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:31 +02:00
Richard Henderson 13672386a9 target/i386: Fix BLSR and BLSI
The implementation of these two instructions was swapped.
At the same time, unify the setup of eflags for the insn group.

Reported-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170712192902.15493-1-rth@twiddle.net>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-28 19:05:30 +02:00
Stefan Hajnoczi f18793b096 compiler: add a sizeof_field() macro
Determining the size of a field is useful when you don't have a struct
variable handy.  Open-coding this is ugly.

This patch adds the sizeof_field() macro, which is similar to
typeof_field().  Existing instances are updated to use the macro.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
Reviewed-by: John Snow <jsnow@redhat.com>
Message-id: 20180614164431.29305-1-stefanha@redhat.com
Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
2018-06-27 13:01:40 +01:00
Babu Moger 6b2942f966 i386: Remove generic SMT thread check
Remove generic non-intel check while validating hyperthreading support.
Certain AMD CPUs can support hyperthreading now.

CPU family with TOPOEXT feature can support hyperthreading now.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Tested-by: Geoffrey McRae <geoff@hostfission.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <1529443919-67509-4-git-send-email-babu.moger@amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Babu Moger e00516475c i386: Enable TOPOEXT feature on AMD EPYC CPU
Enable TOPOEXT feature on EPYC CPU. This is required to support
hyperthreading on VM guests. Also extend xlevel to 0x8000001E.

Disable topoext on PC_COMPAT_2_12 and keep xlevel 0x8000000a.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1529443919-67509-3-git-send-email-babu.moger@amd.com>
[ehabkost: Added EPYC-IBPB.xlevel to PC_COMPAT_2_12]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Babu Moger 631be32155 i386: Fix up the Node id for CPUID_8000_001E
This is part of topoext support. To keep the compatibility, it is better
we support all the combination of nr_cores and nr_threads currently
supported. By allowing more nr_cores and nr_threads, we might end up with
more nodes than we can actually support with the real hardware. We need to
fix up the node id to make this work. We can achieve this by shifting the
socket_id bits left to address more nodes.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1529443919-67509-2-git-send-email-babu.moger@amd.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Babu Moger f98bbd8304 i386: Allow TOPOEXT to be enabled on older kernels
Enabling TOPOEXT feature might cause compatibility issues if
older kernels does not set this feature. Lets set this feature
unconditionally.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1528939107-17193-2-git-send-email-babu.moger@amd.com>
[ehabkost: rewrite comment and commit message]
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Konrad Rzeszutek Wilk 254790a909 i386: Define AMD's no SSB mitigation needed.
AMD future CPUs expose a mechanism to tell the guest that the
Speculative Store Bypass Disable is not needed and that the
CPU is all good.

This is exposed via the CPUID 8000_0008.EBX[26] bit.

See 124441_AMD64_SpeculativeStoreBypassDisable_Whitepaper_final.pdf

A copy of this document is available at
        https://bugzilla.kernel.org/show_bug.cgi?id=199889

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Message-Id: <20180601153809.15259-3-konrad.wilk@oracle.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Konrad Rzeszutek Wilk a764f3f719 i386: define the AMD 'amd-ssbd' CPUID feature bit
AMD future CPUs expose _two_ ways to utilize the Intel equivalant
of the Speculative Store Bypass Disable. The first is via
the virtualized VIRT_SPEC CTRL MSR (0xC001_011f) and the second
is via the SPEC_CTRL MSR (0x48). The document titled:
124441_AMD64_SpeculativeStoreBypassDisable_Whitepaper_final.pdf

gives priority of SPEC CTRL MSR over the VIRT SPEC CTRL MSR.

A copy of this document is available at
      https://bugzilla.kernel.org/show_bug.cgi?id=199889

Anyhow, this means that on future AMD CPUs there will be  _two_ ways to
deal with SSBD.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Message-Id: <20180601153809.15259-2-konrad.wilk@oracle.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Eduardo Habkost 9ccb9784b5 i386: Remove ospke CPUID flag name
OSPKE is not a static feature flag: it changes dynamically at
runtime depending on CR4, and it was never configurable: KVM
never returned OSPKE on GET_SUPPORTED_CPUID, and on TCG enables
it automatically if CR4_PKE_MASK is set.

Remove OSPKE from the feature name array so users don't try to
configure it manually.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180611203712.12086-1-ehabkost@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Eduardo Habkost f1a23522b0 i386: Remove osxsave CPUID flag name
OSXAVE is not a static feature flag: it changes dynamically at
runtime depending on CR4, and it was never configurable: KVM
never returned OSXSAVE on GET_SUPPORTED_CPUID, and it is not
included in TCG_EXT_FEATURES.

Remove OSXSAVE from the feature name array so users don't try to
configure it manually.

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Message-Id: <20180611203855.13269-1-ehabkost@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Daniel P. Berrangé cc643b1e78 i386: display known CPUID features linewrapped, in alphabetical order
When using '-cpu help' the list of CPUID features is grouped according
to the internal low level CPUID grouping. The data printed results in
very long lines too.

This combines to make it hard for users to read the output and identify
if QEMU knows about the feature they wish to use.

This change gets rid of the grouping of features and treats all flags as
single list. The list is sorted into alphabetical order and the printing
with line wrapping at the 77th column.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20180606165527.17365-4-berrange@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Daniel P. Berrangé c7dbff4b3a i386: improve sorting of CPU model names
The current list of CPU model names output by "-cpu help" is sorted
alphabetically based on the internal QOM class name. The text that is
displayed, however, uses the CPU model name, which is equivalent to the
QOM class name, minus a suffix. Unfortunately that suffix has an effect
on the sort ordering, for example, causing the various Broadwell
variants to appear reversed:

  x86 486
  x86 Broadwell-IBRS        Intel Core Processor (Broadwell, IBRS)
  x86 Broadwell-noTSX-IBRS  Intel Core Processor (Broadwell, no TSX, IBRS
  x86 Broadwell-noTSX       Intel Core Processor (Broadwell, no TSX)
  x86 Broadwell             Intel Core Processor (Broadwell)
  x86 Conroe                Intel Celeron_4x0 (Conroe/Merom Class Core 2)

By sorting on the actual CPU model name text that is displayed, the
result is

  x86 486
  x86 Broadwell             Intel Core Processor (Broadwell)
  x86 Broadwell-IBRS        Intel Core Processor (Broadwell, IBRS)
  x86 Broadwell-noTSX       Intel Core Processor (Broadwell, no TSX)
  x86 Broadwell-noTSX-IBRS  Intel Core Processor (Broadwell, no TSX, IBRS)
  x86 Conroe                Intel Celeron_4x0 (Conroe/Merom Class Core 2)

This requires extra string allocations during sorting, but this is not a
concern given the usage scenario and the number of CPU models that exist.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20180606165527.17365-3-berrange@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Daniel P. Berrangé 081492ca8a i386: improve alignment of CPU model listing
Since the addition of the -IBRS CPU model variants, the descriptions
shown by '-cpu help' are not well aligned, as several model names
overflow the space allowed. Right aligning the CPU model names is also
not attractive, because it obscures the common name prefixes of many
models. The CPU model name field needs to be 4 characters larger, and
be left aligned instead.

Signed-off-by: Daniel P. Berrangé <berrange@redhat.com>
Message-Id: <20180606165527.17365-2-berrange@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Babu Moger ed78467a21 i386: Add support for CPUID_8000_001E for AMD
Add support for cpuid leaf CPUID_8000_001E. Build the config that closely
match the underlying hardware. Please refer to the Processor Programming
Reference (PPR) for AMD Family 17h Model for more details.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1528498581-131037-2-git-send-email-babu.moger@amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-22 15:01:15 -03:00
Babu Moger 8f4202fb10 i386: Populate AMD Processor Cache Information for cpuid 0x8000001D
Add information for cpuid 0x8000001D leaf. Populate cache topology information
for different cache types (Data Cache, Instruction Cache, L2 and L3) supported
by 0x8000001D leaf. Please refer to the Processor Programming Reference (PPR)
for AMD Family 17h Model for more details.

Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1527176614-26271-3-git-send-email-babu.moger@amd.com>
Reviewed-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-08 15:54:10 -03:00
Eduardo Habkost a9f27ea9ad i386: Clean up cache CPUID code
Always initialize CPUCaches structs with cache information, even
if legacy_cache=true.  Use different CPUCaches struct for
CPUID[2], CPUID[4], and the AMD CPUID leaves.

This will simplify a lot the logic inside cpu_x86_cpuid().

Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Signed-off-by: Babu Moger <babu.moger@amd.com>
Message-Id: <1527176614-26271-2-git-send-email-babu.moger@amd.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
2018-06-08 15:54:10 -03:00
Peter Maydell 163670542f tcg-next queue
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 lV321YYI7nx7sHtViG/B3iTkvnxzZPWcc7XbBMxyV5xmMQ/5zjS/ynZPFyy/cYRn
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Merge remote-tracking branch 'remotes/rth/tags/tcg-next-pull-request' into staging

tcg-next queue

# gpg: Signature made Sat 02 Jun 2018 00:12:42 BST
# gpg:                using RSA key 64DF38E8AF7E215F
# gpg: Good signature from "Richard Henderson <richard.henderson@linaro.org>"
# Primary key fingerprint: 7A48 1E78 868B 4DB6 A85A  05C0 64DF 38E8 AF7E 215F

* remotes/rth/tags/tcg-next-pull-request:
  tcg: Pass tb and index to tcg_gen_exit_tb separately

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
2018-06-04 11:28:31 +01:00
Richard Henderson 07ea28b418 tcg: Pass tb and index to tcg_gen_exit_tb separately
Do the cast to uintptr_t within the helper, so that the compiler
can type check the pointer argument.  We can also do some more
sanity checking of the index argument.

Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
2018-06-01 15:15:27 -07:00
Peter Maydell 244e2ad0dc target/i386/kvm.c: Remove compatibility shim for KVM_HINTS_REALTIME
Now we've updated our copy of the kernel headers we can remove the
compatibility shim that handled KVM_HINTS_REALTIME not being defined.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180525132755.21839-7-peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-01 15:14:31 +02:00
Peter Maydell 2af1acadc2 target/i386/kvm.c: Handle renaming of KVM_HINTS_DEDICATED
In kernel header commit 633711e8287, the define KVM_HINTS_DEDICATED
was renamed to KVM_HINTS_REALTIME. Work around this compatibility
break by (a) using the new constant name, and (b) defining it
if the headers don't.

Part (b) can be removed once we've updated our copy of the kernel
headers to a version that defines KVM_HINTS_REALTIME.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <20180525132755.21839-5-peter.maydell@linaro.org>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-01 15:14:31 +02:00
Lucian Petrut c3942bf2bd WHPX: fix some compiler warnings
This patch fixes a few compiler warnings, especially in case of
x86 targets, where the number of registers was not properly handled
and could cause an overflow.

Signed-off-by: Alessandro Pilotti <apilotti@cloudbasesolutions.com>
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Signed-off-by: Lucian Petrut <lpetrut@cloudbasesolutions.com>
Message-Id: <1526405722-10887-3-git-send-email-lpetrut@cloudbasesolutions.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-01 15:13:46 +02:00
Lucian Petrut 327fccb288 WHPX: dynamically load WHP libraries
We're currently linking against import libraries of the WHP DLLs.

By dynamically loading the libraries, we ensure that QEMU will work
on previous Windows versions, where the WHP DLLs will be missing
(assuming that WHP is not requested).

Also, we're simplifying the build process, as we no longer require
the import libraries.

Signed-off-by: Alessandro Pilotti <apilotti@cloudbasesolutions.com>
Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Signed-off-by: Lucian Petrut <lpetrut@cloudbasesolutions.com>
Message-Id: <1526405722-10887-2-git-send-email-lpetrut@cloudbasesolutions.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-01 15:13:46 +02:00