Currently we keep track of only two states: guest mode and host
mode. This patch adds an "exiting guest mode" state that tells
us that an IPI will happen soon, so unless we need to wait for the
IPI, we can avoid it completely.
Also
1: No need atomically to read/write ->mode in vcpu's thread
2: reorganize struct kvm_vcpu to make ->mode and ->requests
in the same cache line explicitly
Signed-off-by: Xiao Guangrong <xiaoguangrong@cn.fujitsu.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
Get rid of this warning:
CC arch/s390/kvm/../../../virt/kvm/kvm_main.o
arch/s390/kvm/../../../virt/kvm/kvm_main.c:596:12: warning: 'kvm_create_dirty_bitmap' defined but not used
The only caller of the function is within a !CONFIG_S390 section, so add the
same ifdef around kvm_create_dirty_bitmap() as well.
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This case is a pure user space error we do not need to record. Moreover,
it can be misused to flood the kernel log. Remove it.
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Instead of exchanging the guest and host rcx, have separate storage
for each. This allows us to avoid using the xchg instruction, which
is is a little slower than normal operations.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Change
push top-of-stack
pop guest-rcx
pop dummy
to
pop guest-rcx
which is the same thing, only simpler.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
On some CPUs, a ple_gap of 41 is simply insufficient to ever trigger
PLE exits, even with the minimalistic PLE test from kvm-unit-tests.
http://git.kernel.org/?p=virt/kvm/kvm-unit-tests.git;a=commitdiff;h=eda71b28fa122203e316483b35f37aaacd42f545
For example, the Xeon X5670 CPU needs a ple_gap of at least 48 in
order to get pause loop exits:
# modprobe kvm_intel ple_gap=47
# taskset 1 /usr/local/bin/qemu-system-x86_64 \
-device testdev,chardev=log -chardev stdio,id=log \
-kernel x86/vmexit.flat -append ple-round-robin -smp 2
VNC server running on `::1:5900'
enabling apic
enabling apic
ple-round-robin 58298446
# rmmod kvm_intel
# modprobe kvm_intel ple_gap=48
# taskset 1 /usr/local/bin/qemu-system-x86_64 \
-device testdev,chardev=log -chardev stdio,id=log \
-kernel x86/vmexit.flat -append ple-round-robin -smp 2
VNC server running on `::1:5900'
enabling apic
enabling apic
ple-round-robin 36616
Increase the ple_gap to 128 to be on the safe side.
Signed-off-by: Rik van Riel <riel@redhat.com>
Acked-by: Zhai, Edwin <edwin.zhai@intel.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
This patch adds the necessary code to run perf-kvm on AMD
machines.
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Avi Kivity <avi@redhat.com>
When emulating real mode, we fake some state:
- tr.base points to a fake vm86 tss
- segment registers are made to conform to vm86 restrictions
change vmx_get_segment() not to expose this fake state to userspace;
instead, return the original state.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
When emulating real mode we play with tr hidden state, but leave
tr.selector alone. That works well, except for save/restore, since
loading TR writes it to the hidden state in vmx->rmode.
Fix by also saving and restoring the tr selector; this makes things
more consistent and allows migration to work during the early
boot stages of Windows XP.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Previously SPRGs 4-7 were improperly read and written in
kvm_arch_vcpu_ioctl_get_regs() and kvm_arch_vcpu_ioctl_set_regs();
Signed-off-by: Alexander Graf <agraf@suse.de>
Signed-off-by: Peter Tyser <ptyser@xes-inc.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
WARNING: arch/x86/built-in.o(.text+0x1bb74): Section mismatch in reference from the function kvm_guest_cpu_online() to the function .cpuinit.text:kvm_guest_cpu_init()
The function kvm_guest_cpu_online() references
the function __cpuinit kvm_guest_cpu_init().
This is often because kvm_guest_cpu_online lacks a __cpuinit
annotation or the annotation of kvm_guest_cpu_init is wrong.
This patch fixes the warning.
Tested with linux-next (next-20101231)
Signed-off-by: Sedat Dilek <sedat.dilek@gmail.com>
Acked-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
Instead, drop large mappings, which were the reason we dropped shadow.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
goto out_thread is called before we take the lock. It causes a gcc
warning: "kernel/irq/manage.c:858: warning: ‘flags’ may be used
uninitialized in this function"
[ tglx: Moved unlock before free_cpumask_var() ]
Signed-off-by: Dan Carpenter <error27@gmail.com>
LKML-Reference: <20110317114307.GJ2008@bicker>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
arch/cris/arch-v10/kernel/irq.c: In function 'init_IRQ':
arch/cris/arch-v10/kernel/irq.c:202:3: error: implicit declaration of
function 'set_irq_desc_and_handler'
Should have been set_irq_chip_and_handler()
Fix it and convert to the new function names while at it.
Reported-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Regenerated the parser after "genksyms: Track changes to enum
constants".
Signed-off-by: Michal Marek <mmarek@suse.cz>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Enum constants can be used as array sizes; if the enum itself does not
appear in the symbol expansion, a change in the enum constant will go
unnoticed. Example patch that changes the ABI but does not change the
checksum with current genksyms:
| enum e {
| E1,
| E2,
|+ E3,
| E_MAX
| };
|
| struct s {
| int a[E_MAX];
| }
|
| int f(struct s *s) { ... }
| EXPORT_SYMBOL(f)
Therefore, remember the value of each enum constant and
expand each occurence to <constant> <value>. The value is not actually
computed, but instead an expression in the form
(last explicitly assigned value) + N
is used. This avoids having to parse and semantically understand whole
of C.
Note: The changes won't take effect until the lexer and parser are
rebuilt by the next patch.
Signed-off-by: Michal Marek <mmarek@suse.cz>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Allow searching for symbols of an exact type. The lexer does this and a
subsequent patch will add one more usage.
Signed-off-by: Michal Marek <mmarek@suse.cz>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Instead of special-casing SYM_NORMAL, do not map any name to it. Also
explicitly set the single-letter name of the symbol type, which will be
needed by a further patch. The only user-visible change is one debug
printf.
Signed-off-by: Michal Marek <mmarek@suse.cz>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
The header is already #included, no need to include it a second time.
lex.c_shipped was regenerated using flex-2.5.35.
Signed-off-by: Michal Marek <mmarek@suse.cz>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Fix amd64_debug_display_dimm_sizes() arguments order per convention (pvt
is always first). Also, the now second arg denotes the DCT so adjust its
type.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
A node id can never be negative since we use it as an index into
the DRAM ranges array. This also makes one of the BUG_ON conditions
redundant.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Add the PCI device ids required for driver registration. Remove
pvt->ctl_name and use the family descriptor directly, instead. Then,
bump driver version and fixup its format. Finally, enable DRAM ECC
decoding on F15h.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
F15h has the same ECC symbol size options as F10h revD and later so
adjust checks to that. Simplify code a bit.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
With increasing number of PCI function ids, add the PCI function id
in the define name instead of its symbolic name in the BKDG for more
clarity.
Acked-by: Ingo Molnar <mingo@elte.hu>
Acked-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Drop static tables which map the bits in F2x80 to a chip select size in
favor of functions doing the mapping with some bit fiddling. Also, add
F15 support.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
This function is relevant for F10h and higher, and it has only one
callsite so drop its function pointer from the low_ops struct.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
F15h sys_addr to chip select mapping is almost identical to F10h's so
reuse that. Rename functions on that path accordingly.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Replace per-DCT macros with smarter ones, drop hack and look for the
spare rank on all chip selects on a channel.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
When node interleaving is enabled, a subset of the addr[14:12] bits has
to be removed in order to get the normalized DCT address of the DRAM
channel. The actual number of bits to remove is determined by F1x[1,
0][7C:40][IntlvEn]. Do this correctly.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
On revC3 and revE Fam10h machines and later, non-interleaved graphics
framebuffer memory under the 16G mark can be swapped with a region
located at the bottom of memory so that the GPU can use the interleaved
region and thus two channels. Add support for that.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
The address bits from MC4_STATUS differ only between K8 and the rest so
no need for a per-family method.
No functional change.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
Use the struct mce directly instead of copying from it into a custom
struct err_regs.
No functionality change.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
The only difference is that F10h used to sport ganged DCTs and F15h
doesn't so adjust the F10h routine and reuse it.
Signed-off-by: Borislav Petkov <borislav.petkov@amd.com>
