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path: root/drivers/kvm/svm.c
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* KVM: SVM: Defer nmi processing until switch to host state is completeAvi Kivity2007-11-08
| | | | | | | | If we stgi() too soon, nmis can reach the processor even though interrupts are disabled, catching it in a half-switched state. Delay the stgi() until we're done switching. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SVM: Fix SMP with kernel apicAvi Kivity2007-11-08
| | | | | | AP processor needs to reset to the SIPI vector, not normal INIT. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Improve emulation failure reportingAvi Kivity2007-10-13
| | | | | | Report failed opcodes from all locations. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Move main vcpu loop into subarch independent codeAvi Kivity2007-10-13
| | | | | | This simplifies adding new code as well as reducing overall code size. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Rename kvm_arch_ops to kvm_x86_opsChristian Ehrhardt2007-10-13
| | | | | | | | This patch just renames the current (misnamed) _arch namings to _x86 to ensure better readability when a real arch layer takes place. Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Hoist SVM's get_cs_db_l_bits into core code.Rusty Russell2007-10-13
| | | | | | | | SVM gets the DB and L bits for the cs by decoding the segment. This is in fact the completely generic code, so hoist it for kvm-lite to use. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Clean up unloved invlpg emulationRusty Russell2007-10-13
| | | | | | | | | | invlpg shouldn't fetch the "src" address, since it may not be valid, however SVM's "solution" which neuters emulation of all group 7 instruction is horrible and breaks kvm-lite. The simplest fix is to put a special check in for invlpg. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Remove the unused invlpg member of struct kvm_arch_ops.Rusty Russell2007-10-13
| | | | | Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Migrate lapic hrtimer when vcpu moves to another cpuEddie Dong2007-10-13
| | | | | | | | | | | This reduces overhead by accessing cachelines from the wrong node, as well as simplifying locking. [Qing: fix for inactive or expired one-shot timer] Signed-off-by: Yaozu (Eddie) Dong <Eddie.Dong@intel.com> Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Keep track of missed timer irq injectionsEddie Dong2007-10-13
| | | | | | | | | | | | | APIC timer IRQ is set every time when a certain period expires at host time, but the guest may be descheduled at that time and thus the irq be overwritten by later fire. This patch keep track of firing irq numbers and decrease only when the IRQ is injected to guest or buffered in APIC. Signed-off-by: Yaozu (Eddie) Dong <Eddie.Dong@intel.com> Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: pending irq save/restoreEddie Dong2007-10-13
| | | | | | | | | | | Add in kernel irqchip save/restore support for pending vectors. [avi: fix compile warning on i386] [avi: remove printk] Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Emulate hlt in the kernelEddie Dong2007-10-13
| | | | | | | | | By sleeping in the kernel when hlt is executed, we simplify the in-kernel guest interrupt path considerably. Signed-off-by: Gregory Haskins <ghaskins@novell.com> Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Emulate local APIC in kernelEddie Dong2007-10-13
| | | | | | | | | | | | | | | | Because lightweight exits (exits which don't involve userspace) are many times faster than heavyweight exits, it makes sense to emulate high usage devices in the kernel. The local APIC is one such device, especially for Windows and for SMP, so we add an APIC model to kvm. It also allows in-kernel host-side drivers to inject interrupts without going through userspace. [compile fix on i386 from Jindrich Makovicka] Signed-off-by: Yaozu (Eddie) Dong <Eddie.Dong@intel.com> Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Define and use cr8 access functionsEddie Dong2007-10-13
| | | | | | | | | This patch is to wrap APIC base register and CR8 operation which can provide a unique API for user level irqchip and kernel irqchip. This is a preparation of merging lapic/ioapic patch. Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Add support for in-kernel PIC emulationEddie Dong2007-10-13
| | | | | Signed-off-by: Yaozu (Eddie) Dong <eddie.dong@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Close minor race in signal handlingAvi Kivity2007-10-13
| | | | | | | | | | We need to check for signals inside the critical section, otherwise a signal can be sent which we will not notice. Also move the check before entry, so that if the signal happens before the first entry, we exit immediately instead of waiting for something to happen to the guest. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Clean up kvm_setup_pio()Laurent Vivier2007-10-13
| | | | | | | | Split kvm_setup_pio() into two functions, one to setup in/out pio (kvm_emulate_pio()) and one to setup ins/outs pio (kvm_emulate_pio_string()). Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Cleanup string I/O instruction emulationLaurent Vivier2007-10-13
| | | | | | | | | | | | | | | | | Both vmx and svm decode the I/O instructions, and both botch the job, requiring the instruction prefixes to be fetched in order to completely decode the instruction. So, if we see a string I/O instruction, use the x86 emulator to decode it, as it already has all the prefix decoding machinery. This patch defines ins/outs opcodes in x86_emulate.c and calls emulate_instruction() from io_interception() (svm.c) and from handle_io() (vmx.c). It removes all vmx/svm prefix instruction decoders (get_addr_size(), io_get_override(), io_address(), get_io_count()) Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Use kmem_cache_free for kmem_cache_zalloc'ed objectsRusty Russell2007-10-13
| | | | | | | | We use kfree in svm.c and vmx.c, and this works, but it could break at any time. kfree() is supposed to match up with kmalloc(). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Add and use pr_unimpl for standard formatting of unimplemented featuresRusty Russell2007-10-13
| | | | | | | | All guest-invokable printks should be ratelimited to prevent malicious guests from flooding logs. This is a start. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SVM: Make set_msr_interception more reliableRusty Russell2007-10-13
| | | | | | | | | | | | set_msr_interception() is used by svm to set up which MSRs should be intercepted. It can only fail if someone has changed the code to try to intercept an MSR without updating the array of ranges. The return value is ignored anyway: it should just BUG() if it doesn't work. (A build-time failure would be better, but that's tricky). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: VMX: Add cpu consistency checkYang, Sheng2007-10-13
| | | | | | | | | All the physical CPUs on the board should support the same VMX feature set. Add check_processor_compatibility to kvm_arch_ops for the consistency check. Signed-off-by: Sheng Yang <sheng.yang@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Use alignment properties of vcpu to simplify FPU opsRusty Russell2007-10-13
| | | | | | | | | Now we use a kmem cache for allocating vcpus, we can get the 16-byte alignment required by fxsave & fxrstor instructions, and avoid manually aligning the buffer. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Use kmem cache for allocating vcpusRusty Russell2007-10-13
| | | | | | | | | Avi wants the allocations of vcpus centralized again. The easiest way is to add a "size" arg to kvm_init_arch, and expose the thus-prepared cache to the modules. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Remove kvm_{read,write}_guest()Laurent Vivier2007-10-13
| | | | | | | ... in favor of the more general emulator_{read,write}_*. Signed-off-by: Laurent Vivier <Laurent.Vivier@bull.net> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SVM: internal function name cleanupRusty Russell2007-10-13
| | | | | | | | | | Changes some svm.c internal function names: 1) io_adress -> io_address (de-germanify the spelling) 2) kvm_reput_irq -> reput_irq (it's not a generic kvm function) 3) kvm_do_inject_irq -> (it's not a generic kvm function) Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SVM: de-containizationRusty Russell2007-10-13
| | | | | | | | | container_of is wonderful, but not casting at all is better. This patch changes svm.c's internal functions to pass "struct vcpu_svm" instead of "struct kvm_vcpu" and using container_of. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Remove three magic numbersRusty Russell2007-10-13
| | | | | | | | There are several places where hardcoded numbers are used in place of the easily-available constant, which is poor form. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Convert vm lock to a mutexShaohua Li2007-10-13
| | | | | | | | This allows the kvm mmu to perform sleepy operations, such as memory allocation. Signed-off-by: Shaohua Li <shaohua.li@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Use the scheduler preemption notifiers to make kvm preemptibleAvi Kivity2007-10-13
| | | | | | | | | | | | | | Current kvm disables preemption while the new virtualization registers are in use. This of course is not very good for latency sensitive workloads (one use of virtualization is to offload user interface and other latency insensitive stuff to a container, so that it is easier to analyze the remaining workload). This patch re-enables preemption for kvm; preemption is now only disabled when switching the registers in and out, and during the switch to guest mode and back. Contains fixes from Shaohua Li <shaohua.li@intel.com>. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Dynamically allocate vcpusRusty Russell2007-10-13
| | | | | | | | | | This patch converts the vcpus array in "struct kvm" to a pointer array, and changes the "vcpu_create" and "vcpu_setup" hooks into one "vcpu_create" call which does the allocation and initialization of the vcpu (calling back into the kvm_vcpu_init core helper). Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Remove arch specific components from the general codeGregory Haskins2007-10-13
| | | | | | | | struct kvm_vcpu has vmx-specific members; remove them to a private structure. Signed-off-by: Gregory Haskins <ghaskins@novell.com> Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Set exit_reason to KVM_EXIT_MMIO where run->mmio is initialized.Jeff Dike2007-10-13
| | | | | Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Use standard CR4 flags, tighten checkingRusty Russell2007-10-13
| | | | | | | | | | | On this machine (Intel), writing to the CR4 bits 0x00000800 and 0x00001000 cause a GPF. The Intel manual is a little unclear, but AFIACT they're reserved, too. Also fix spelling of CR4_RESEVED_BITS. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Trivial: Use standard CR0 flags macros from asm/cpu-features.hRusty Russell2007-10-13
| | | | | | | | | | The kernel now has asm/cpu-features.h: use those macros instead of inventing our own. Also spell out definition of CR0_RESEVED_BITS (no code change) and fix typo. Signed-off-by: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SMP: Add vcpu_id field in struct vcpuQing He2007-10-13
| | | | | | | | This patch adds a `vcpu_id' field in `struct vcpu', so we can differentiate BSP and APs without pointer comparison or arithmetic. Signed-off-by: Qing He <qing.he@intel.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Clean up #includesAvi Kivity2007-07-16
| | | | | | Remove unnecessary ones, and rearange the remaining in the standard order. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SVM: Reliably detect if SVM was disabled by BIOSJoerg Roedel2007-07-16
| | | | | | | | | | This patch adds an implementation to the svm is_disabled function to detect reliably if the BIOS disabled the SVM feature in the CPU. This fixes the issues with kernel panics when loading the kvm-amd module on machines where SVM is available but disabled. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Initialize the BSP bit in the APIC_BASE msr correctlyAvi Kivity2007-07-16
| | | | | | Needs to be set on vcpu 0 only. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SVM: Replace memset(<addr>, 0, PAGESIZE) with clear_page(<addr>)Shani Moideen2007-07-16
| | | | | Signed-off-by: Shani Moideen <shani.moideen@wipro.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Flush remote tlbs when reducing shadow pte permissionsAvi Kivity2007-07-16
| | | | | | | | | | | When a vcpu causes a shadow tlb entry to have reduced permissions, it must also clear the tlb on remote vcpus. We do that by: - setting a bit on the vcpu that requests a tlb flush before the next entry - if the vcpu is currently executing, we send an ipi to make sure it exits before we continue Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Move duplicate halt handling code into kvm_main.cAvi Kivity2007-07-16
| | | | | | Will soon have a thid user. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Lazy guest cr3 switchingAvi Kivity2007-07-16
| | | | | | | | | Switch guest paging context may require us to allocate memory, which might fail. Instead of wiring up error paths everywhere, make context switching lazy and actually do the switch before the next guest entry, where we can return an error if allocation fails. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SVM: Allow direct guest access to PC debug portAnthony Liguori2007-07-16
| | | | | | | The PC debug port is used for IO delay and does not require emulation. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* Detach sched.h from mm.hAlexey Dobriyan2007-05-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | First thing mm.h does is including sched.h solely for can_do_mlock() inline function which has "current" dereference inside. By dealing with can_do_mlock() mm.h can be detached from sched.h which is good. See below, why. This patch a) removes unconditional inclusion of sched.h from mm.h b) makes can_do_mlock() normal function in mm/mlock.c c) exports can_do_mlock() to not break compilation d) adds sched.h inclusions back to files that were getting it indirectly. e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were getting them indirectly Net result is: a) mm.h users would get less code to open, read, preprocess, parse, ... if they don't need sched.h b) sched.h stops being dependency for significant number of files: on x86_64 allmodconfig touching sched.h results in recompile of 4083 files, after patch it's only 3744 (-8.3%). Cross-compile tested on all arm defconfigs, all mips defconfigs, all powerpc defconfigs, alpha alpha-up arm i386 i386-up i386-defconfig i386-allnoconfig ia64 ia64-up m68k mips parisc parisc-up powerpc powerpc-up s390 s390-up sparc sparc-up sparc64 sparc64-up um-x86_64 x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig as well as my two usual configs. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* KVM: SVM: Only save/restore MSRs when neededAnthony Liguori2007-05-03
| | | | | | | | | | | | We only have to save/restore MSR_GS_BASE on every VMEXIT. The rest can be saved/restored when we leave the VCPU. Since we don't emulate the DEBUGCTL MSRs and the guest cannot write to them, we don't have to worry about saving/restoring them at all. This shaves a whopping 40% off raw vmexit costs on AMD. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: VMX: Properly shadow the CR0 register in the vcpu structAnthony Liguori2007-05-03
| | | | | | | | Set all of the host mask bits for CR0 so that we can maintain a proper shadow of CR0. This exposes CR0.TS, paving the way for lazy fpu handling. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Lazy FPU support for SVMAnthony Liguori2007-05-03
| | | | | | | | Avoid saving and restoring the guest fpu state on every exit. This shaves ~100 cycles off the guest/host switch. Signed-off-by: Anthony Liguori <aliguori@us.ibm.com> Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: Per-vcpu statisticsAvi Kivity2007-05-03
| | | | | | | | Make the exit statistics per-vcpu instead of global. This gives a 3.5% boost when running one virtual machine per core on my two socket dual core (4 cores total) machine. Signed-off-by: Avi Kivity <avi@qumranet.com>
* KVM: SVM: Report hardware exit reason to userspace instead of dmesgAvi Kivity2007-05-03
| | | | Signed-off-by: Avi Kivity <avi@qumranet.com>
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