Archipelago » qemu

Add svm cpuid features

This patch adds the svm cpuid feature flags to the qemu
intialization path. It also adds the svm features available
on phenom to its cpu-definition and extends the host cpu
type to support all svm features KVM can provide.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>...

MCE: Relay UCR MCE to guest

Port qemu-kvm's

commit 4b62fff1101a7ad77553147717a8bd3bf79df7ef
Author: Huang Ying <ying.huang@intel.com>
Date: Mon Sep 21 10:43:25 2009 +0800

MCE: Relay UCR MCE to guest

UCR (uncorrected recovery) MCE is supported in recent Intel CPUs,...

Fix memory leak in register save load due to xsave support

From: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

kvm: Enable XSAVE live migration support

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

kvm: Fix cpu_is_bsp() compilation warning

Signed-off-by: Sheng Yang <sheng@linux.intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

kvm: fix 80000001.EDX supported bit filtering

On AMD some bits from 1.EDX are reported in 80000001.EDX. The mask used
to copy bits from 1.EDX to 80000001.EDX is incorrect resulting in
unsupported features passed into a guest.

Signed-off-by: Gleb Natapov <gleb@redhat.com>...

kvm: validate context for kvm cpu get/put operations

Validate that KVM vcpu state is only read/written from cpu thread itself
or that cpu is stopped.

Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Signed-off-by: Avi Kivity <avi@redhat.com>

KVM: x86: Add debug register saving and restoring

Make use of the new KVM_GET/SET_DEBUGREGS to save/restore the x86 debug
registers.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>

kvm: avoid collision with dprintf macro in stdio.h, spotted by clang

Fixes clang errors:
CC i386-softmmu/kvm.o
/src/qemu/target-i386/kvm.c:40:9: error: 'dprintf' macro redefined
In file included from /src/qemu/target-i386/kvm.c:21:
In file included from /src/qemu/qemu-common.h:27:...

KVM: x86: Restrict writeback of VCPU state

Do not write nmi_pending, sipi_vector, and mpstate unless we at least go
through a reset. And TSC as well as KVM wallclocks should only be
written on full sync, otherwise we risk to drop some time on state
read-modify-write....

KVM: Rework of guest debug state writing

So far we synchronized any dirty VCPU state back into the kernel before
updating the guest debug state. This was a tribute to a deficite in x86
kernels before 2.6.33. But as this is an arch-dependent issue, it is
better handle in the x86 part of KVM and remove the writeback point for...

Merge remote branch 'qemu-kvm/uq/master' into staging

QEMU e820 reservation patch

Hi,

Kevin and I have agreed on the approach for this one now. So here is
the latest version of the patch for QEMU, submitting e820 reservation
entries via fw_cfg.

Cheers,
Jes

Use qemu-cfg to provide the BIOS with an optional table of e820 entries....

KVM: Request setting of nmi_pending and sipi_vector

The final version of VCPU events in 2.6.33 will allow to skip
nmi_pending and sipi_vector on KVM_SET_VCPU_EVENTS. For now let's write
them unconditionally, which is unproblematic for upstream due to missing...

remove pending exception on vcpu reset.

Without this qemu can even start on kvm modules with events support
since default value of exception_injected in zero and this is #DE
exception.

Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

v2: properly save kvm system time msr registers

Currently, the msrs involved in setting up pvclock are not saved over
migration and/or save/restore. This patch puts their value in special
fields in our CPUState, and deal with them using vmstate.

kvm also has to account for it, by including them in the msr list...

kvm: x86: Add support for VCPU event states

This patch extends the qemu-kvm state sync logic with support for
KVM_GET/SET_VCPU_EVENTS, giving access to yet missing exception,
interrupt and NMI states.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

kvm: Add arch reset handler

Will be required by succeeding changes.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

kvm: Move KVM mp_state accessors to i386-specific code

Unbreaks PowerPC and S390 KVM builds.

Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

kvm: Work around borken MSR_GET_INDEX_LIST

Allocate enough memory for KVM_GET_MSR_INDEX_LIST as older kernels shot
far beyond their limits, corrupting user space memory.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>

fix KVMs GET_SUPPORTED_CPUID feature usage

If we want to trim the user provided CPUID bits for KVM to be not greater
than that of the host, we should not remove the bits after we sent
them to the kernel.
This fixes the masking of features that are not present on the host by...

kvm: work around supported cpuid ioctl() brokenness

KVM_GET_SUPPORTED_CPUID has been known to fail to return -E2BIG
when it runs out of entries. Detect this by always trying again
with a bigger table if the ioctl() fills the table.

Signed-off-by: Mark McLoughlin <markmc@redhat.com>

kvm: Fix cpuid initialization (Jan Kiszka)

Fix (more or less) spurious guest boot failures due to corrupted cpuid
states. The reason was insufficient initialization of cpuid entries
before passing them to the kernel.

At this chance also fix improper entry pointer progression and simplify...

Guest debugging support for KVM (Jan Kiszka)

This is a backport of the guest debugging support for the KVM
accelerator that is now part of the KVM tree. It implements the reworked
KVM kernel API for guest debugging (KVM_CAP_SET_GUEST_DEBUG) which is
not yet part of any mainline kernel but will probably be 2.6.30 stuff....

KVM: Get all cpuid values from function 2 (Amit Shah)

cpuid function 2 can have multiple values to describe cache behaviour.
Loop till we have fetched all the values.

Signed-off-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>...

KVM: CPUID takes ecx as input value for some functions (Amit Shah)

The CPUID instruction takes the value of ECX as an input parameter
in addition to the value of EAX as the count for functions 4, 0xb
and 0xd. Make sure we pass the value to the instruction....

kvm-x86: Remove eflags conversion into emulator format (Jan Kiszka)

It seems that the conversion of the kernel-delivered eflags state into
qemu's internal split representation was once needed in an older kvm
design (register read-back may have taken place from inside cpu_exec)....

Correctly initialize msr list in KVM

I believe this was spotted by Gerd Hoffman but I can't find his patch
now. This will cause very subtle corruption on the heap because we
don't allocate the appropriately sized buffer.

Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>...

Define kvm_ioctl in the same way as ioctl

The third argument to ioctl is a ... which allows any value to be passed. In
practice, glibc always treats the argument as a void *.

Do the same thing for the kvm ioctls to keep things consistent with a
traditional ioctl....