- 27 Apr, 2008 40 commits
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Joerg Roedel authored
The svm_set_cr4 function is indented with spaces. This patch replaces them with tabs. Signed-off-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
Avi Kivity <avi@qumranet.com>
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Avi Kivity authored
Signed-off-by: -
Anthony Liguori authored
This patch introduces a gfn_to_pfn() function and corresponding functions like kvm_release_pfn_dirty(). Using these new functions, we can modify the x86 MMU to no longer assume that it can always get a struct page for any given gfn. We don't want to eliminate gfn_to_page() entirely because a number of places assume they can do gfn_to_page() and then kmap() the results. When we support IO memory, gfn_to_page() will fail for IO pages although gfn_to_pfn() will succeed. This does not implement support for avoiding reference counting for reserved RAM or for IO memory. However, it should make those things pretty straight forward. Since we're only introducing new common symbols, I don't think it will break the non-x86 architectures but I haven't tested those. I've tested Intel, AMD, NPT, and hugetlbfs with Windows and Linux guests. [avi: fix overflow when shifting left pfns by adding casts] Signed-off-by:
Anthony Liguori <aliguori@us.ibm.com> Signed-off-by:
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Xiantao Zhang authored
Guide for creating virtual machine on kvm/ia64. Signed-off-by:
Xiantao Zhang <xiantao.zhang@intel.com> Signed-off-by:
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Xiantao Zhang authored
Update the related Makefile and KConfig for kvm build Signed-off-by:
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Xiantao Zhang authored
Some sal/pal calls would be traped to kvm for virtulization from guest firmware. Signed-off-by:
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Xiantao Zhang authored
process.c mainly handle interruption injection, and some faults handling. Signed-off-by:
Anthony Xu <anthony.xu@intel.com> Signed-off-by:
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Xiantao Zhang authored
asm-offsets.c will generate offset values used for assembly code for some fileds of special structures. Signed-off-by:
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Xiantao Zhang authored
optvfault.S Add optimization for some performance-critical virtualization faults. Signed-off-by:
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Xiantao Zhang authored
vcpu.c provides processor virtualization logic for kvm. Signed-off-by:
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Xiantao Zhang authored
trampoline code targets for guest/host world switch. Signed-off-by:
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Xiantao Zhang authored
mmio.c includes mmio decoder, and related mmio logics. Signed-off-by:
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Xiantao Zhang authored
vmm_ivt.S includes an ivt for vmm use. Signed-off-by:
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Xiantao Zhang authored
vtlb.c includes tlb/VHPT virtulization. Signed-off-by:
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Xiantao Zhang authored
vmm.c adds the interfaces with kvm/module, and initialize global data area. Signed-off-by:
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Xiantao Zhang authored
kvm_minstate.h : Marcos about Min save routines. lapic.h: apic structure definition. vcpu.h : routions related to vcpu virtualization. vti.h : Some macros or routines for VT support on Itanium. Signed-off-by:
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Xiantao Zhang authored
kvm_ia64.c is created to handle kvm ia64-specific core logic. Signed-off-by:
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Xiantao Zhang authored
Three header files are added: asm-ia64/kvm.h asm-ia64/kvm_host.h asm-ia64/kvm_para.h Signed-off-by:
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Xiantao Zhang authored
Register structures are defined per SDM. Add three small routines for kernel: ia64_ttag, ia64_loadrs, ia64_flushrs Signed-off-by:
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Heiko Carstens authored
There is no need to use interlocked updates when the rcp lock is held. Therefore the simple bitops variants can be used. This should improve performance. Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
Carsten Otte <cotte@de.ibm.com> Signed-off-by:
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Heiko Carstens authored
Temporarily rename this function to avoid merge conflicts and/or dependencies. This function will be removed as soon as git-s390 and kvm.git are finally upstream. Signed-off-by:
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Heiko Carstens authored
kvm_arch_vcpu_ioctl_run currently incorrectly always returns 0. Signed-off-by:
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Marcelo Tosatti authored
Zdenek reported a bug where a looping "dmsetup status" eventually hangs on SMP guests. The problem is that kvm_mmu_get_page() prepopulates the shadow MMU before write protecting the guest page tables. By doing so, it leaves a window open where the guest can mark a pte as present while the host has shadow cached such pte as "notrap". Accesses to such address will fault in the guest without the host having a chance to fix the situation. Fix by moving the write protection before the pte prefetch. Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by:
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Avi Kivity authored
If the accessed bit is not set, the guest has never accessed this page (at least through this spte), so there's no need to mark the page accessed. This provides more accurate data for the eviction algortithm. Noted by Andrea Arcangeli. Signed-off-by: -
Izik Eidus authored
the main purpose of adding this functions is the abilaty to release the spinlock that protect the kvm list while still be able to do operations on a specific kvm in a safe way. Signed-off-by:
Izik Eidus <izike@qumranet.com> Signed-off-by:
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Joerg Roedel authored
The kvm_host.h file for x86 declares the functions kvm_set_cr[0348]. In the header file their second parameter is named cr0 in all cases. This patch renames the parameters so that they match the function name. Signed-off-by:
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Avi Kivity authored
Noticed by Marcelo Tosatti. Signed-off-by: -
Izik Eidus authored
Allow the Linux memory manager to reclaim memory in the kvm shadow cache. Signed-off-by:
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Marcelo Tosatti authored
Unify slots_lock acquision around vcpu_run(). This is simpler and less error-prone. Also fix some callsites that were not grabbing the lock properly. [avi: drop slots_lock while in guest mode to avoid holding the lock for indefinite periods] Signed-off-by: -
Sheng Yang authored
MSR Bitmap controls whether the accessing of an MSR causes VM Exit. Eliminating exits on automatically saved and restored MSRs yields a small performance gain. Signed-off-by:
Sheng Yang <sheng.yang@intel.com> Signed-off-by:
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Christian Borntraeger authored
This patch implements kvm guest kernel support for paravirtualized devices and contains two parts: o a basic virtio stub using virtio_ring and external interrupts and hypercalls o full hypercall implementation in kvm_para.h Currently we dont have PCI on s390. Making virtio_pci usable for s390 seems more complicated that providing an own stub. This virtio stub is similar to the lguest one, the memory for the descriptors and the device detection is made via additional mapped memory on top of the guest storage. We use an external interrupt with extint code 0x2603 for host->guest notification. The hypercall definition uses the diag instruction for issuing a hypercall. The parameters are written in R2-R7, the hypercall number is written in R1. This is similar to the system call ABI (svc) which can use R1 for the number and R2-R6 for the parameters. Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com> Acked-by:
Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by:
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Carsten Otte authored
This patch adds functionality to detect if the kernel runs under the KVM hypervisor. A macro MACHINE_IS_KVM is exported for device drivers. This allows drivers to skip device detection if the systems runs non-virtualized. We also define a preferred console to avoid having the ttyS0, which is a line mode only console. Signed-off-by:
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Christian Borntraeger authored
This patch adds an entry for kvm on s390 to the MAINTAINERS file :-). We intend to push all patches regarding this via Avi's kvm.git. Signed-off-by:
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Carsten Otte authored
This patch adds Documentation/s390/kvm.txt, which describes specifics of kvm's user interface that are unique to s390 architecture. Signed-off-by:
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Christian Borntraeger authored
This patch adds the virtualization submenu and the kvm option to the kernel config. It also defines HAVE_KVM for 64bit kernels. Acked-by:
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Christian Borntraeger authored
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 itself In 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 <martin.schwidefsky@de.ibm.com> Signed-off-by:
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Christian Borntraeger authored
This patch introduces in-kernel handling of _some_ sigp interprocessor signals (similar to ipi). kvm_s390_handle_sigp() decodes the sigp instruction and calls individual handlers depending on the operation requested: - sigp sense tries to retrieve information such as existence or running state of the remote cpu - sigp emergency sends an external interrupt to the remove cpu - sigp stop stops a remove cpu - sigp stop store status stops a remote cpu, and stores its entire internal state to the cpus lowcore - sigp set arch sets the architecture mode of the remote cpu. setting to ESAME (s390x 64bit) is accepted, setting to ESA/S390 (s390, 31 or 24 bit) is denied, all others are passed to userland - sigp set prefix sets the prefix register of a remote cpu For implementation of this, the stop intercept indication starts to get reused on purpose: a set of action bits defines what to do once a cpu gets stopped: ACTION_STOP_ON_STOP really stops the cpu when a stop intercept is recognized ACTION_STORE_ON_STOP stores the cpu status to lowcore when a stop intercept is recognized Acked-by: -
Christian Borntraeger authored
This patch introduces in-kernel handling of some intercepts for privileged instructions: handle_set_prefix() sets the prefix register of the local cpu handle_store_prefix() stores the content of the prefix register to memory handle_store_cpu_address() stores the cpu number of the current cpu to memory handle_skey() just decrements the instruction address and retries handle_stsch() delivers condition code 3 "operation not supported" handle_chsc() same here handle_stfl() stores the facility list which contains the capabilities of the cpu handle_stidp() stores cpu type/model/revision and such handle_stsi() stores information about the system topology Acked-by: -
Carsten Otte authored
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 processor struct 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: -
Christian Borntraeger authored
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 userland Acked-by:
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