This patch adds very basic KVM support. KVM is a kernel module for Linux that
allows userspace programs to make use of hardware virtualization support. It
current supports x86 hardware virtualization using Intel VT-x or AMD-V. It
also supports IA64 VT-i, PPC 440, and S390.
This patch only implements the bare minimum support to get a guest booting. It
has very little impact the rest of QEMU and attempts to integrate nicely with
the rest of QEMU.
Even though this implementation is basic, it is significantly faster than TCG.
Booting and shutting down a Linux guest:
w/TCG: 1:32.36 elapsed 84% CPU
w/KVM: 0:31.14 elapsed 59% CPU
Right now, KVM is disabled by default and must be explicitly enabled with
-enable-kvm. We can enable it by default later when we have had better
testing.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5627 c046a42c-6fe2-441c-8c8c-71466251a162
KVM needs to call CPUID from outside of the TCG code. This patch
splits out the CPUID logic into a separate helper that both the op
helper and KVM can call.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5626 c046a42c-6fe2-441c-8c8c-71466251a162
Some x86 CPU definitions that KVM needs
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5625 c046a42c-6fe2-441c-8c8c-71466251a162
A target_ulong may be 64-bit. Passing it to a function expecting a 32-bit
pointer is wrong and unfortunately happens to work for x86. It won't work on
big endian hosts though. Change the code to work properly on all hosts.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5570 c046a42c-6fe2-441c-8c8c-71466251a162
With SVM the TLB supports tagging to distinguish TLB entries from
different virtual CPUs. This tag is called an ASID. The amount of ASIDs is
given in EBX of the SVM-CPUID-leaf. Currently we return 0, which might
break hypervisors. Let's better return something >0 here, say 0x10.
Since we're flushing the complete TLB on every VM entry and exit we're not
making use of the ASID information anyways.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5496 c046a42c-6fe2-441c-8c8c-71466251a162
This patch adds a CPU definition for the Core Duo CPU. I tried to
resemble the original as closely as possible and document what features
are missing still. This patch enables the use of a recent CPU definition
on 32 bit platforms.
It also fixes two issues that went along the line:
- invalid xlevel in core2duo spec
While looking though the CPUIDs again, I found that xlevel is actually 8.
- non-PSE36 support
The CoreDuo CPUID does not expose the PSE36 capability, but CPUID
0x80000008 is tied to 36 bits. This broke Windows XP installation for
me, so I just set it to 32 bits width when PSE36 is not available. The
original CPU also exposes 32 bit width in CPUID 0x80000008.
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5488 c046a42c-6fe2-441c-8c8c-71466251a162
Forced the constant's width to long long so that it doesn't overflow,
problem spotted by C. W. Betts.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5417 c046a42c-6fe2-441c-8c8c-71466251a162
This adds support for CPUID_EXT_SSE41, CPUID_EXT_SSE42, CPUID_EXT_POPCNT
extensions. Most instructions haven't been tested yet.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5411 c046a42c-6fe2-441c-8c8c-71466251a162
load_seg_vm calls cpu_x86_load_seg_cache which updates hflags of
current env, real hardware doesn't do this, nor the code that handles
real mode lret/lcall/ljmp.
This unbreaks "unreal mode" and makes QEMU the first emulator being
able to run Project Angel demo by IMPACT Studios. (Not that there are
many physical machines out there capable of doing the same)
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5403 c046a42c-6fe2-441c-8c8c-71466251a162
sysenter_cs is a u32 and is loaded as a u32.
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5351 c046a42c-6fe2-441c-8c8c-71466251a162
the CPUID specification. This patch addresses this by specifying exactly
what is missing.
While going along the missing CPUID entries I also stumbled across
invalid and missing CPUID #defines while comparing them to the Intel
Documentation. This patch also addresses these. I found them too minor
to split them up in a separate patch.
Furthermore I looked through CPUID functions > 5 and realized that it
should be safe to bump the level to 10. I tried booting Linux with that
and it worked fine.
Signed-off-by: Alexander Graf <agraf@suse.de>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5350 c046a42c-6fe2-441c-8c8c-71466251a162
As noticed by Alexander Graf Atom is a name of a series with varying
features.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5341 c046a42c-6fe2-441c-8c8c-71466251a162
On Intel CPUs, sysenter and sysexit are valid in 64-bit mode. This patch
makes both 64-bit aware and enables them for Intel CPUs.
Add cpu save/load for 64-bit wide sysenter variables.
Signed-off-by: Alexander Graf <agraf@suse.de>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5318 c046a42c-6fe2-441c-8c8c-71466251a162
This patch adds a Core 2 Duo CPU to the available CPU types. The CPU
definition tries to resemble a real CPU as good as possible, whilst not
exposing features qemu does not implement.
The patch also includes some minor additions that Core 2 Duo CPUs have:
- New MSR: MSR_IA32_PERF_STATUS
- CPUID up to level 5 (cache info and mwait)
Signed-off-by: Alexander Graf <agraf@suse.de>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5317 c046a42c-6fe2-441c-8c8c-71466251a162
Right now CPU vendor identification contains a lot of magic numbers. The
patch cleans them up to defines, so we can identify the CPU later on
without copying magic numbers.
Signed-off-by: Alexander Graf <agraf@suse.de>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5316 c046a42c-6fe2-441c-8c8c-71466251a162
As discussed in
http://lists.gnu.org/archive/html/qemu-devel/2008-08/msg00667.html,
current pxe boot is broken for some use cases. The problem
goes away if we reduce the number of allowed bits in the address space
to 32 (which has the side effect of reducing guest max mem size to 4Gb).
After digging for a while, it turns out that it happens because pxelinux
tries to access address 0x10009e9a6, which does not fit a 32-bit address.
A closer look, however, reveals this access is totally valid: It's just
0x9e9a6 with an add carry.
To avoid this, this patch casts the address passed to the POPL macro to
a 32-bit value. This is also done, although just theorectically, for
PUSHL too.
Signed-off-by: Glauber Costa <glommer@redhat.com>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
Reported-by: Chris Lalancette <clalance@redhat.com>
CC: Eduardo Habkost <ehabkost@redhat.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5182 c046a42c-6fe2-441c-8c8c-71466251a162
It helps debugging guests when yet unmapped pages are correctly reported
as, well, unmapped.
Signed-off-by: Jan Kiszka <jan.kiszka@web.de>
Signed-off-by: Anthony Liguori <aliguori@us.ibm.com>
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5025 c046a42c-6fe2-441c-8c8c-71466251a162
Save and restore env->interrupt_request and env->halted.
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@4817 c046a42c-6fe2-441c-8c8c-71466251a162
