16 Jan, 2009
1 commit
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Impact: fix 15 make headers_check warnings:
include of is preferred over
Signed-off-by: Jaswinder Singh Rajput
Cc: Ingo Molnar
Cc: Sam Ravnborg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
31 Dec, 2008
5 commits
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There is no point in doing the ready_for_nmi_injection/
request_nmi_window dance with user space. First, we don't do this for
in-kernel irqchip anyway, while the code path is the same as for user
space irqchip mode. And second, there is nothing to loose if a pending
NMI is overwritten by another one (in contrast to IRQs where we have to
save the number). Actually, there is even the risk of raising spurious
NMIs this way because the reason for the held-back NMI might already be
handled while processing the first one.Therefore this patch creates a simplified user space NMI injection
interface, exporting it under KVM_CAP_USER_NMI and dropping the old
KVM_CAP_NMI capability. And this time we also take care to provide the
interface only on archs supporting NMIs via KVM (right now only x86).Signed-off-by: Jan Kiszka
Signed-off-by: Avi Kivity -
Userspace might need to act differently.
Signed-off-by: Avi Kivity
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We enable guest MSI and host MSI support in this patch. The userspace want to
enable MSI should set KVM_DEV_IRQ_ASSIGN_ENABLE_MSI in the assigned_irq's flag.
Function would return -ENOTTY if can't enable MSI, userspace shouldn't set MSI
Enable bit when KVM_ASSIGN_IRQ return -ENOTTY with
KVM_DEV_IRQ_ASSIGN_ENABLE_MSI.Userspace can tell the support of MSI device from #ifdef KVM_CAP_DEVICE_MSI.
Signed-off-by: Sheng Yang
Signed-off-by: Avi Kivity -
Prepared for kvm_arch_assigned_device_msi_dispatch().
Signed-off-by: Sheng Yang
Signed-off-by: Avi Kivity -
Introduces the KVM_NMI IOCTL to the generic x86 part of KVM for
injecting NMIs from user space and also extends the statistic report
accordingly.Based on the original patch by Sheng Yang.
Signed-off-by: Jan Kiszka
Signed-off-by: Sheng Yang
Signed-off-by: Avi Kivity
28 Oct, 2008
1 commit
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Reserve some space so we can add more data.
Signed-off-by: Avi Kivity
15 Oct, 2008
9 commits
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With intel iommu hardware, we can assign devices to kvm/ia64 guests.
Signed-off-by: Xiantao Zhang
Signed-off-by: Avi Kivity -
To share with other archs, this patch moves device assignment
logic to common parts.Signed-off-by: Xiantao Zhang
Signed-off-by: Avi Kivity -
Based on a patch by: Kay, Allen M
This patch enables PCI device assignment based on VT-d support.
When a device is assigned to the guest, the guest memory is pinned and
the mapping is updated in the VT-d IOMMU.[Amit: Expose KVM_CAP_IOMMU so we can check if an IOMMU is present
and also control enable/disable from userspace]Signed-off-by: Kay, Allen M
Signed-off-by: Weidong Han
Signed-off-by: Ben-Ami Yassour
Signed-off-by: Amit ShahAcked-by: Mark Gross
Signed-off-by: Avi Kivity -
Based on a patch from: Amit Shah
This patch adds support for handling PCI devices that are assigned to
the guest.The device to be assigned to the guest is registered in the host kernel
and interrupt delivery is handled. If a device is already assigned, or
the device driver for it is still loaded on the host, the device
assignment is failed by conveying a -EBUSY reply to the userspace.Devices that share their interrupt line are not supported at the moment.
By itself, this patch will not make devices work within the guest.
The VT-d extension is required to enable the device to perform DMA.
Another alternative is PVDMA.Signed-off-by: Amit Shah
Signed-off-by: Ben-Ami Yassour
Signed-off-by: Weidong Han
Signed-off-by: Avi Kivity -
This patch adds a trace point for the instruction emulation on embedded powerpc
utilizing the KVM_TRACE interface.Signed-off-by: Christian Ehrhardt
Signed-off-by: Avi Kivity -
This patch adds trace points to track powerpc TLB activities using the
KVM_TRACE infrastructure.Signed-off-by: Jerone Young
Signed-off-by: Christian Ehrhardt
Signed-off-by: Avi Kivity -
The current kvmtrace code uses get_cycles() while the interpretation would be
easier using using nanoseconds. ktime_get() should give at least the same
accuracy as get_cycles on all architectures (even better on 32bit archs) but
at a better unit (e.g. comparable between hosts with different frequencies.[avi: avoid ktime_t in public header]
Signed-off-by: Christian Ehrhardt
Acked-by: Christian Borntraeger
Signed-off-by: Avi Kivity -
This patch fixes kvmtrace use on big endian systems. When using bit fields the
compiler will lay data out in the wrong order expected when laid down into a
file.
This fixes it by using one variable instead of using bit fields.Signed-off-by: Jerone Young
Signed-off-by: Christian Ehrhardt
Signed-off-by: Avi Kivity -
Move KVM trace definitions from x86 specific kvm headers to common kvm
headers to create a cross-architecture numbering scheme for trace
events. This means the kvmtrace_format userspace tool won't need to know
which architecture produced the log file being processed.Signed-off-by: Jerone Young
Signed-off-by: Hollis Blanchard
Signed-off-by: Avi Kivity
25 Aug, 2008
1 commit
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The following part of commit 9ef621d3be56e1188300476a8102ff54f7b6793f
(KVM: Support mixed endian machines) changed on the size of a struct
that is exported to userspace:include/linux/kvm.h:
@@ -318,14 +318,14 @@ struct kvm_trace_rec {
__u32 vcpu_id;
union {
struct {
- __u32 cycle_lo, cycle_hi;
+ __u64 cycle_u64;
__u32 extra_u32[KVM_TRC_EXTRA_MAX];
} cycle;
struct {
__u32 extra_u32[KVM_TRC_EXTRA_MAX];
} nocycle;
} u;
-};
+} __attribute__((packed));Packing a struct was the correct idea, but it packed the wrong struct.
Signed-off-by: Adrian Bunk
Signed-off-by: Avi Kivity
29 Jul, 2008
1 commit
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Signed-off-by: Avi Kivity
20 Jul, 2008
2 commits
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Currently kvmtrace is not portable. This will prevent from copying a
trace file from big-endian target to little-endian workstation for analysis.
In the patch, kernel outputs metadata containing a magic number to trace
log, and changes 64-bit words to be u64 instead of a pair of u32s.Signed-off-by: Tan Li
Acked-by: Jerone Young
Acked-by: Hollis Blanchard
Signed-off-by: Avi Kivity -
This patch adds all needed structures to coalesce MMIOs.
Until an architecture uses it, it is not compiled.Coalesced MMIO introduces two ioctl() to define where are the MMIO zones that
can be coalesced:- KVM_REGISTER_COALESCED_MMIO registers a coalesced MMIO zone.
It requests one parameter (struct kvm_coalesced_mmio_zone) which defines
a memory area where MMIOs can be coalesced until the next switch to
user space. The maximum number of MMIO zones is KVM_COALESCED_MMIO_ZONE_MAX.- KVM_UNREGISTER_COALESCED_MMIO cancels all registered zones inside
the given bounds (bounds are also given by struct kvm_coalesced_mmio_zone).The userspace client can check kernel coalesced MMIO availability by asking
ioctl(KVM_CHECK_EXTENSION) for the KVM_CAP_COALESCED_MMIO capability.
The ioctl() call to KVM_CAP_COALESCED_MMIO will return 0 if not supported,
or the page offset where will be stored the ring buffer.
The page offset depends on the architecture.After an ioctl(KVM_RUN), the first page of the KVM memory mapped points to
a kvm_run structure. The offset given by KVM_CAP_COALESCED_MMIO is
an offset to the coalesced MMIO ring expressed in PAGE_SIZE relatively
to the address of the start of th kvm_run structure. The MMIO ring buffer
is defined by the structure kvm_coalesced_mmio_ring.[akio: fix oops during guest shutdown]
Signed-off-by: Laurent Vivier
Signed-off-by: Akio Takebe
Signed-off-by: Avi Kivity
27 Apr, 2008
15 commits
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Device Control Registers are essentially another address space found on PowerPC
4xx processors, analogous to PIO on x86. DCRs are always 32 bits, and can be
identified by a 32-bit number. We forward most DCR accesses to userspace for
emulation (with the exception of CPR0 registers, which can be read directly
for simplicity in timebase frequency determination).Signed-off-by: Hollis Blanchard
Signed-off-by: Avi Kivity -
So userspace can save/restore the mpstate during migration.
[avi: export the #define constants describing the value]
[christian: add s390 stubs]
[avi: ditto for ia64]Signed-off-by: Marcelo Tosatti
Signed-off-by: Christian Borntraeger
Signed-off-by: Carsten Otte
Signed-off-by: Avi Kivity -
Trace markers allow userspace to trace execution of a virtual machine
in order to monitor its performance.Signed-off-by: Feng (Eric) Liu
Signed-off-by: Avi Kivity -
This patch introduces interpretation of some diagnose instruction intercepts.
Diagnose is our classic architected way of doing a hypercall. This patch
features the following diagnose codes:
- vm storage size, that tells the guest about its memory layout
- time slice end, which is used by the guest to indicate that it waits
for a lock and thus cannot use up its time slice in a useful way
- ipl functions, which a guest can use to reset and reboot itselfIn order to implement ipl functions, we also introduce an exit reason that
causes userspace to perform various resets on the virtual machine. All resets
are described in the principles of operation book, except KVM_S390_RESET_IPL
which causes a reboot of the machine.Acked-by: Martin Schwidefsky
Signed-off-by: Christian Borntraeger
Signed-off-by: Carsten Otte
Signed-off-by: Avi Kivity -
This patch contains the s390 interrupt subsystem (similar to in kernel apic)
including timer interrupts (similar to in-kernel-pit) and enabled wait
(similar to in kernel hlt).In order to achieve that, this patch also introduces intercept handling
for instruction intercepts, and it implements load control instructions.This patch introduces an ioctl KVM_S390_INTERRUPT which is valid for both
the vm file descriptors and the vcpu file descriptors. In case this ioctl is
issued against a vm file descriptor, the interrupt is considered floating.
Floating interrupts may be delivered to any virtual cpu in the configuration.The following interrupts are supported:
SIGP STOP - interprocessor signal that stops a remote cpu
SIGP SET PREFIX - interprocessor signal that sets the prefix register of a
(stopped) remote cpu
INT EMERGENCY - interprocessor interrupt, usually used to signal need_reshed
and for smp_call_function() in the guest.
PROGRAM INT - exception during program execution such as page fault, illegal
instruction and friends
RESTART - interprocessor signal that starts a stopped cpu
INT VIRTIO - floating interrupt for virtio signalisation
INT SERVICE - floating interrupt for signalisations from the system
service processorstruct kvm_s390_interrupt, which is submitted as ioctl parameter when injecting
an interrupt, also carrys parameter data for interrupts along with the interrupt
type. Interrupts on s390 usually have a state that represents the current
operation, or identifies which device has caused the interruption on s390.kvm_s390_handle_wait() does handle waitpsw in two flavors: in case of a
disabled wait (that is, disabled for interrupts), we exit to userspace. In case
of an enabled wait we set up a timer that equals the cpu clock comparator value
and sleep on a wait queue.[christian: change virtio interrupt to 0x2603]
Acked-by: Martin Schwidefsky
Signed-off-by: Heiko Carstens
Signed-off-by: Carsten Otte
Signed-off-by: Christian Borntraeger
Signed-off-by: Avi Kivity -
This path introduces handling of sie intercepts in three flavors: Intercepts
are either handled completely in-kernel by kvm_handle_sie_intercept(),
or passed to userspace with corresponding data in struct kvm_run in case
kvm_handle_sie_intercept() returns -ENOTSUPP.
In case of partial execution in kernel with the need of userspace support,
kvm_handle_sie_intercept() may choose to set up struct kvm_run and return
-EREMOTE.The trivial intercept reasons are handled in this patch:
handle_noop() just does nothing for intercepts that don't require our support
at all
handle_stop() is called when a cpu enters stopped state, and it drops out to
userland after updating our vcpu state
handle_validity() faults in the cpu lowcore if needed, or passes the request
to userlandAcked-by: Martin Schwidefsky
Signed-off-by: Christian Borntraeger
Signed-off-by: Carsten Otte
Signed-off-by: Avi Kivity -
This patch contains the port of Qumranet's kvm kernel module to IBM zSeries
(aka s390x, mainframe) architecture. It uses the mainframe's virtualization
instruction SIE to run virtual machines with up to 64 virtual CPUs each.
This port is only usable on 64bit host kernels, and can only run 64bit guest
kernels. However, running 31bit applications in guest userspace is possible.The following source files are introduced by this patch
arch/s390/kvm/kvm-s390.c similar to arch/x86/kvm/x86.c, this implements all
arch callbacks for kvm. __vcpu_run calls back into
sie64a to enter the guest machine context
arch/s390/kvm/sie64a.S assembler function sie64a, which enters guest
context via SIE, and switches world before and after that
include/asm-s390/kvm_host.h contains all vital data structures needed to run
virtual machines on the mainframe
include/asm-s390/kvm.h defines kvm_regs and friends for user access to
guest register content
arch/s390/kvm/gaccess.h functions similar to uaccess to access guest memory
arch/s390/kvm/kvm-s390.h header file for kvm-s390 internals, extended by
later patchesAcked-by: Martin Schwidefsky
Signed-off-by: Christian Borntraeger
Signed-off-by: Heiko Carstens
Signed-off-by: Carsten Otte
Signed-off-by: Avi Kivity -
include/linux/kvm.h defines struct kvm_dirty_log to
[...]
union {
void __user *dirty_bitmap; /* one bit per page */
__u64 padding;
};__user requires compiler.h to compile. Currently, this works on x86
only coincidentally due to other include files. This patch makes
kvm.h compile in all cases.Signed-off-by: Christian Borntraeger
Signed-off-by: Avi Kivity -
Hypercall based pte updates are faster than faults, and also allow use
of the lazy MMU mode to batch operations.Don't report the feature if two dimensional paging is enabled.
[avi:
- one mmu_op hypercall instead of one per op
- allow 64-bit gpa on hypercall
- don't pass host errors (-ENOMEM) to guest][akpm: warning fix on i386]
Signed-off-by: Marcelo Tosatti
Signed-off-by: Andrew Morton
Signed-off-by: Avi Kivity -
Add basic KVM paravirt support. Avoid vm-exits on IO delays.
Signed-off-by: Marcelo Tosatti
Signed-off-by: Avi Kivity -
Signed-off-by: Sheng Yang
Signed-off-by: Avi Kivity -
The patch moves the PIT model from userspace to kernel, and increases
the timer accuracy greatly.[marcelo: make last_injected_time per-guest]
Signed-off-by: Sheng Yang
Signed-off-by: Marcelo Tosatti
Tested-and-Acked-by: Alex Davis
Signed-off-by: Avi Kivity -
Signed-off-by: Avi Kivity
-
Signed-off-by: Avi Kivity
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This is the host part of kvm clocksource implementation. As it does
not include clockevents, it is a fairly simple implementation. We
only have to register a per-vcpu area, and start writing to it periodically.The area is binary compatible with xen, as we use the same shadow_info
structure.[marcelo: fix bad_page on MSR_KVM_SYSTEM_TIME]
[avi: save full value of the msr, even if enable bit is clear]
[avi: clear previous value of time_page]Signed-off-by: Glauber de Oliveira Costa
Signed-off-by: Marcelo Tosatti
Signed-off-by: Avi Kivity
03 Mar, 2008
1 commit
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One of the use cases for the supported cpuid list is to create a "greatest
common denominator" of cpu capabilities in a server farm. As such, it is
useful to be able to get the list without creating a virtual machine first.Since the code does not depend on the vm in any way, all that is needed is
to move it to the device ioctl handler. The capability identifier is also
changed so that binaries made against -rc1 will fail gracefully.Signed-off-by: Avi Kivity
31 Jan, 2008
4 commits
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This patch moves kvm_fpu asm-x86/kvm.h to allow every architecture to
define an own representation used for KVM_GET_FPU/KVM_SET_FPU.Signed-off-by: Christian Ehrhardt
Acked-by: Carsten Otte
Acked-by: Zhang Xiantao
Signed-off-by: Avi Kivity -
This adds a mechanism for exposing the virtual apic tpr to the guest, and a
protocol for letting the guest update the tpr without causing a vmexit if
conditions allow (e.g. there is no interrupt pending with a higher priority
than the new tpr).Signed-off-by: Avi Kivity
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Add a facility to report on accesses to the local apic tpr even if the
local apic is emulated in the kernel. This is basically a hack that
allows userspace to patch Windows which tends to bang on the tpr a lot.Signed-off-by: Avi Kivity
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IA64 also needs to see ioapic structure in irqchip.
Signed-off-by: xiantao.zhang@intel.com
Signed-off-by: Avi Kivity