Commit Graph

18 Commits

Author SHA1 Message Date
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
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
Philippe Mathieu-Daudé 23c11b04dc target: Do not include "exec/exec-all.h" if it is not necessary
Code change produced with:
    $ git grep '#include "exec/exec-all.h"' | \
      cut -d: -f-1 | \
      xargs egrep -L "(cpu_address_space_init|cpu_loop_|tlb_|tb_|GETPC|singlestep|TranslationBlock)" | \
      xargs sed -i.bak '/#include "exec\/exec-all.h"/d'

Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20180528232719.4721-10-f4bug@amsat.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-06-01 14:15:10 +02:00
Justin Terry (VM) 7becac84fb target/i386: WHPX: set CPUID_EXT_HYPERVISOR bit
Implements the CPUID trap for CPUID 1 to include the
CPUID_EXT_HYPERVISOR flag in the ECX results. This was preventing some
older linux kernels from booting when trying to access MSR's that dont
make sense when virtualized.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <20180326170658.606-1-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-04-09 16:36:38 +02:00
Justin Terry (VM) 4e286099fe WHPX improve vcpu_post_run perf
This removes the additional call to WHvGetVirtualProcessorRegisters in
whpx_vcpu_post_run now that the WHV_VP_EXIT_CONTEXT is returned in all
WHV_RUN_VP_EXIT_CONTEXT structures.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1521039163-138-4-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-03-26 14:37:12 +02:00
Justin Terry (VM) 60168541da WHPX fix WHvSetPartitionProperty in PropertyCode
This fixes a breaking change to WHvSetPartitionProperty to pass the 'in'
PropertyCode on function invocation introduced in Windows Insider SDK 17110.
Usage of this indicates the PropertyCode of the opaque PropertyBuffer passed in
on function invocation.

Also fixes the removal of the PropertyCode parameter from the
WHV_PARTITION_PROPERTY struct as it is now passed to the function directly.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1521039163-138-3-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-03-26 14:37:12 +02:00
Justin Terry (VM) 3907e6318e WHPX fix WHvGetCapability out WrittenSizeInBytes
This fixes a breaking change to WHvGetCapability to include the 'out'
WrittenSizeInBytes introduced in Windows Insider SDK 17110.

This specifies on return the safe length to read into the WHV_CAPABILITY
structure passed to the call.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1521039163-138-2-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-03-26 14:37:12 +02:00
Justin Terry (VM) via Qemu-devel eb1fe944a8 WHPX improve interrupt notification registration
Improves the usage of the InterruptNotification registration by skipping the
additional call to WHvSetVirtualProcessorRegisters if we have already
registered for the window exit.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-9-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
2018-03-06 14:01:29 +01:00
Justin Terry (VM) via Qemu-devel e2940978fc WHXP Removes the use of WHvGetExitContextSize
The use of WHvGetExitContextSize will break ABI compatibility if the platform
changes the context size while a qemu compiled executable does not recompile.
To avoid this we now use sizeof and let the platform determine which version
of the struction was passed for ABI compatibility.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-8-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
2018-03-06 14:01:29 +01:00
Justin Terry (VM) via Qemu-devel 2bf3e74de4 Fix WHPX issue leaking tpr values
Fixes an issue where if the tpr is assigned to the array but not a different
value from what is already expected on the vp the code will skip incrementing
the reg_count. In this case its possible that we set an invalid memory section
of the next call for DeliverabilityNotifications that was not expected.

The fix is to use a local variable to store the temporary tpr and only update
the array if the local tpr value is different than the vp context.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-7-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
2018-03-06 14:01:29 +01:00
Justin Terry (VM) via Qemu-devel f875f04c2c Fix WHPX typo in 'mmio'
Renames the usage of 'memio' to 'mmio' in the emulator callbacks.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-6-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
2018-03-06 14:01:29 +01:00
Justin Terry (VM) via Qemu-devel b27350e1b9 Fix WHPX additional lock acquisition
The code already is holding the qemu_mutex for the IO thread. We do not need
to additionally take the lock again in this case.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-5-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
2018-03-06 14:01:29 +01:00
Justin Terry (VM) via Qemu-devel 0ab2e74d79 Remove unnecessary WHPX __debugbreak();
Minor code cleanup. The calls to __debugbreak() are not required and should
no longer be used to prevent unnecessary breaks.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-4-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
2018-03-06 14:01:29 +01:00
Justin Terry (VM) via Qemu-devel 914e2ab364 Resolves WHPX breaking changes in SDK 17095
1. Fixes the changes required to the WHvTryMmioEmulation, WHvTryIoEmulation, and
WHvEmulatorCreateEmulator based on the new VpContext forwarding.
2. Removes the WHvRunVpExitReasonAlerted case.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-3-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
2018-03-06 14:01:28 +01:00
Justin Terry (VM) via Qemu-devel 53537bb18c Fixing WHPX casing to match SDK
Fixes an issue where the SDK that was releases had a different casing for the
*.h and *.lib files causing a build break if linked directly from Windows Kits.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1519665216-1078-2-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Justin Terry (VM) via Qemu-devel <qemu-devel@nongnu.org>
2018-03-06 14:01:28 +01:00
Justin Terry (VM) 812d49f2a3 Introduce the WHPX impl
Implements the Windows Hypervisor Platform accelerator (WHPX) target. Which
acts as a hypervisor accelerator for QEMU on the Windows platform. This enables
QEMU much greater speed over the emulated x86_64 path's that are taken on
Windows today.

1. Adds support for vPartition management.
2. Adds support for vCPU management.
3. Adds support for MMIO/PortIO.
4. Registers the WHPX ACCEL_CLASS.

Signed-off-by: Justin Terry (VM) <juterry@microsoft.com>
Message-Id: <1516655269-1785-4-git-send-email-juterry@microsoft.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2018-02-07 14:09:26 +01:00