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* Merge branch 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2010-03-0517-590/+936
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'kvm-updates/2.6.34' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (145 commits) KVM: x86: Add KVM_CAP_X86_ROBUST_SINGLESTEP KVM: VMX: Update instruction length on intercepted BP KVM: Fix emulate_sys[call, enter, exit]()'s fault handling KVM: Fix segment descriptor loading KVM: Fix load_guest_segment_descriptor() to inject page fault KVM: x86 emulator: Forbid modifying CS segment register by mov instruction KVM: Convert kvm->requests_lock to raw_spinlock_t KVM: Convert i8254/i8259 locks to raw_spinlocks KVM: x86 emulator: disallow opcode 82 in 64-bit mode KVM: x86 emulator: code style cleanup KVM: Plan obsolescence of kernel allocated slots, paravirt mmu KVM: x86 emulator: Add LOCK prefix validity checking KVM: x86 emulator: Check CPL level during privilege instruction emulation KVM: x86 emulator: Fix popf emulation KVM: x86 emulator: Check IOPL level during io instruction emulation KVM: x86 emulator: fix memory access during x86 emulation KVM: x86 emulator: Add Virtual-8086 mode of emulation KVM: x86 emulator: Add group9 instruction decoding KVM: x86 emulator: Add group8 instruction decoding KVM: do not store wqh in irqfd ... Trivial conflicts in Documentation/feature-removal-schedule.txt
| * KVM: ppc/booke: Set ESR and DEAR when inject interrupt to guestLiu Yu2010-03-012-17/+46
| | | | | | | | | | | | | | | | | | | | | | Old method prematurely sets ESR and DEAR. Move this part after we decide to inject interrupt, which is more like hardware behave. Signed-off-by: Liu Yu <yu.liu@freescale.com> Acked-by: Hollis Blanchard <hollis@penguinppc.org> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC E500: fix tlbcfg emulationLiu Yu2010-03-012-18/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | commit 55fb1027c1cf9797dbdeab48180da530e81b1c39 doesn't update tlbcfg correctly. Fix it. And since guest OS likes 'fixed' hardware, initialize tlbcfg everytime when guest access is useless. So move this part to init code. Signed-off-by: Liu Yu <yu.liu@freescale.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: PPC: Add PVR/PIR init for E500Liu Yu2010-03-011-0/+6
| | | | | | | | | | | | | | | | | | | | commit 513579e3a391a3874c478a8493080822069976e8 change the way we emulate PVR/PIR, which left PVR/PIR uninitialized on E500, and make guest puzzled. Signed-off-by: Liu Yu <yu.liu@freescale.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: PPC E500: Add register l1csr0 emulationLiu Yu2010-03-011-0/+6
| | | | | | | | | | | | | | | | | | Latest kernel start to access l1csr0 to contron L1. We just tell guest no operation is on going. Signed-off-by: Liu Yu <yu.liu@freescale.com> Acked-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: fix cleanup_srcu_struct on vm destructionMarcelo Tosatti2010-03-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | cleanup_srcu_struct on VM destruction remains broken: BUG: unable to handle kernel paging request at ffffffffffffffff IP: [<ffffffff802533d2>] srcu_read_lock+0x16/0x21 RIP: 0010:[<ffffffff802533d2>] [<ffffffff802533d2>] srcu_read_lock+0x16/0x21 Call Trace: [<ffffffffa05354c4>] kvm_arch_vcpu_uninit+0x1b/0x48 [kvm] [<ffffffffa05339c6>] kvm_vcpu_uninit+0x9/0x15 [kvm] [<ffffffffa0569f7d>] vmx_free_vcpu+0x7f/0x8f [kvm_intel] [<ffffffffa05357b5>] kvm_arch_destroy_vm+0x78/0x111 [kvm] [<ffffffffa053315b>] kvm_put_kvm+0xd4/0xfe [kvm] Move it to kvm_arch_destroy_vm. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Reported-by: Jan Kiszka <jan.kiszka@siemens.com>
| * KVM: PPC: Move Shadow MSR calculation to functionAlexander Graf2010-03-011-6/+21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We keep a copy of the MSR around that we use when we go into the guest context. That copy is basically the normal process MSR flags OR some allowed guest specified MSR flags. We also AND the external providers into this, so we get traps on FPU usage when we haven't activated it on the host yet. Currently this calculation is part of the set_msr function that we use whenever we set the guest MSR value. With the external providers, we also have the case that we don't modify the guest's MSR, but only want to update the shadow MSR. So let's move the shadow MSR parts to a separate function that we then use whenever we only need to update it. That way we don't accidently kvm_vcpu_block within a preempt notifier context. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Keep SRR1 flags around in shadow_msrAlexander Graf2010-03-012-7/+8
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SRR1 stores more information that just the MSR value. It also stores valuable information about the type of interrupt we received, for example whether the storage interrupt we just got was because of a missing htab entry or not. We use that information to speed up the exit path. Now if we get preempted before we can interpret the shadow_msr values, we get into vcpu_put which then calls the MSR handler, which then sets all the SRR1 information bits in shadow_msr to 0. Great. So let's preserve the SRR1 specific bits in shadow_msr whenever we set the MSR. They don't hurt. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Add support for FPU/Altivec/VSXAlexander Graf2010-03-011-5/+188
| | | | | | | | | | | | | | | | | | | | | | | | When our guest starts using either the FPU, Altivec or VSX we need to make sure Linux knows about it and sneak into its process switching code accordingly. This patch makes accesses to the above parts of the system work inside the VM. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Add helper functions to call real mode loadersAlexander Graf2010-03-012-0/+41
| | | | | | | | | | | | | | | | | | | | | | Linux contains quite some bits of code to load FPU, Altivec and VSX lazily for a task. It calls those bits in real mode, coming from an interrupt handler. For KVM we better reuse those, so let's wrap a bit of trampoline magic around them and then we can call them from normal module code. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Make large pages workAlexander Graf2010-03-011-4/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | An SLB entry contains two pieces of information related to size: 1) PTE size 2) SLB size The L bit defines the PTE be "large" (usually means 16MB), SLB_VSID_B_1T defines that the SLB should span 1 GB instead of the default 256MB. Apparently I messed things up and just put those two in one box, shaked it heavily and came up with the current code which handles large pages incorrectly, because it also treats large page SLB entries as "1TB" segment entries. This patch splits those two features apart, making Linux guests boot even when they have > 256MB. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Pass through program interruptsAlexander Graf2010-03-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When we get a program interrupt in guest kernel mode, we try to emulate the instruction. If that doesn't fail, we report to the user and try again - at the exact same instruction pointer. So if the guest kernel really does trigger an invalid instruction, we loop forever. So let's better go and forward program exceptions to the guest when we don't know the instruction we're supposed to emulate. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Pass program interrupt flags to the guestAlexander Graf2010-03-011-2/+5
| | | | | | | | | | | | | | | | | | When we need to reinject a program interrupt into the guest, we also need to reinject the corresponding flags into the guest. Signed-off-by: Alexander Graf <agraf@suse.de> Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Fix HID5 setting codeAlexander Graf2010-03-011-1/+2
| | | | | | | | | | | | | | | | | | The code to unset HID5.dcbz32 is broken. This patch makes it do the right rotate magic. Signed-off-by: Alexander Graf <agraf@suse.de> Reported-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Emulate trap SRR1 flags properlyAlexander Graf2010-03-013-4/+8
| | | | | | | | | | | | | | | | | | | | | | | | Book3S needs some flags in SRR1 to get to know details about an interrupt. One such example is the trap instruction. It tells the guest kernel that a program interrupt is due to a trap using a bit in SRR1. This patch implements above behavior, making WARN_ON behave like WARN_ON. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Call SLB patching code in interrupt safe mannerAlexander Graf2010-03-015-18/+31
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we're racy when doing the transition from IR=1 to IR=0, from the module memory entry code to the real mode SLB switching code. To work around that I took a look at the RTAS entry code which is faced with a similar problem and did the same thing: A small helper in linear mapped memory that does mtmsr with IR=0 and then RFIs info the actual handler. Thanks to that trick we can safely take page faults in the entry code and only need to be really wary of what to do as of the SLB switching part. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Get rid of unnecessary RFIAlexander Graf2010-03-011-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | Using an RFI in IR=1 is dangerous. We need to set two SRRs and then do an RFI without getting interrupted at all, because every interrupt could potentially overwrite the SRR values. Fortunately, we don't need to RFI in at least this particular case of the code, so we can just replace it with an mtmsr and b. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Implement 'skip instruction' modeAlexander Graf2010-03-013-6/+53
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To fetch the last instruction we were interrupted on, we enable DR in early exit code, where we are still in a very transitional phase between guest and host state. Most of the time this seemed to work, but another CPU can easily flush our TLB and HTAB which makes us go in the Linux page fault handler which totally breaks because we still use the guest's SLB entries. To work around that, let's introduce a second KVM guest mode that defines that whenever we get a trap, we don't call the Linux handler or go into the KVM exit code, but just jump over the faulting instruction. That way a potentially bad lwz doesn't trigger any faults and we can later on interpret the invalid instruction we fetched as "fetch didn't work". Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Use PACA backed shadow vcpuAlexander Graf2010-03-014-227/+175
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We're being horribly racy right now. All the entry and exit code hijacks random fields from the PACA that could easily be used by different code in case we get interrupted, for example by a #MC or even page fault. After discussing this with Ben, we figured it's best to reserve some more space in the PACA and just shove off some vcpu state to there. That way we can drastically improve the readability of the code, make it less racy and less complex. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Add helpers for CR, XERAlexander Graf2010-03-013-10/+12
| | | | | | | | | | | | | | | | | | | | We now have helpers for the GPRs, so let's also add some for CR and XER. Having them in the PACA simplifies code a lot, as we don't need to care about where to store CC or not to overflow any integers. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Use accessor functions for GPR accessAlexander Graf2010-03-0110-225/+248
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | All code in PPC KVM currently accesses gprs in the vcpu struct directly. While there's nothing wrong with that wrt the current way gprs are stored and loaded, it doesn't suffice for the PACA acceleration that will follow in this patchset. So let's just create little wrapper inline functions that we call whenever a GPR needs to be read from or written to. The compiled code shouldn't really change at all for now. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: PPC: Enable lightweight exits againAlexander Graf2010-03-012-53/+57
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PowerPC C ABI defines that registers r14-r31 need to be preserved across function calls. Since our exit handler is written in C, we can make use of that and don't need to reload r14-r31 on every entry/exit cycle. This technique is also used in the BookE code and is called "lightweight exits" there. To follow the tradition, it's called the same in Book3S. So far this optimization was disabled though, as the code didn't do what it was expected to do, but failed to work. This patch fixes and enables lightweight exits again. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: PPC: Fix typo in rebolting codeAlexander Graf2010-03-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | When we're loading bolted entries into the SLB again, we're checking if an entry is in use and only slbmte it when it is. Unfortunately, the check always goes to the skip label of the first entry, resulting in an endless loop when it actually gets triggered. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: convert slots_lock to a mutexMarcelo Tosatti2010-03-011-2/+2
| | | | | | | | Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: split kvm_arch_set_memory_region into prepare and commitMarcelo Tosatti2010-03-011-4/+14
| | | | | | | | | | | | Required for SRCU convertion later. Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: modify memslots layout in struct kvmMarcelo Tosatti2010-03-011-1/+1
| | | | | | | | | | | | | | | | | | Have a pointer to an allocated region inside struct kvm. [alex: fix ppc book 3s] Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
| * KVM: powerpc: Remove AGGRESSIVE_DECAlexander Graf2010-03-011-15/+1
| | | | | | | | | | | | | | | | | | | | | | Because we now emulate the DEC interrupt according to real life behavior, there's no need to keep the AGGRESSIVE_DEC hack around. Let's just remove it. Signed-off-by: Alexander Graf <agraf@suse.de> Acked-by: Acked-by: Hollis Blanchard <hollis@penguinppc.org> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: powerpc: Improve DEC handlingAlexander Graf2010-03-013-1/+23
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We treated the DEC interrupt like an edge based one. This is not true for Book3s. The DEC keeps firing until mtdec is issued again and thus clears the interrupt line. So let's implement this logic in KVM too. This patch moves the line clearing from the firing of the interrupt to the mtdec emulation. This makes PPC64 guests work without AGGRESSIVE_DEC defined. Signed-off-by: Alexander Graf <agraf@suse.de> Acked-by: Acked-by: Hollis Blanchard <hollis@penguinppc.org> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: powerpc: Move vector to irqprio resolving to separate functionAlexander Graf2010-03-011-3/+10
| | | | | | | | | | | | | | | | | | | | | | | | We're using a switch table to find the irqprio that belongs to a specific interrupt vector. This table is part of the interrupt inject logic. Since we'll add a new function to stop interrupts, let's move this table out of the injection logic into a separate function. Signed-off-by: Alexander Graf <agraf@suse.de> Acked-by: Acked-by: Hollis Blanchard <hollis@penguinppc.org> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Add KVM_MMIO kconfig itemAvi Kivity2010-03-011-0/+1
| | | | | | | | | | | | s390 doesn't have mmio, this will simplify ifdefing it out. Signed-off-by: Avi Kivity <avi@redhat.com>
* | Merge branch 'master' of ↵David S. Miller2010-02-161-1/+1
|\ \ | |/ | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
| * KVM: powerpc: Show timing option only on embeddedAlexander Graf2010-01-251-1/+1
| | | | | | | | | | | | | | | | | | | | | | Embedded PowerPC KVM has an exit timing implementation to track and evaluate how much time was spent in which exit path. For Book3S, we don't implement it. So let's not expose it as a config option either. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
* | Merge branch 'master' of ↵David S. Miller2010-01-231-1/+21
|\ \ | |/ | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6
| * KVM: powerpc: Fix mtsrin in book3s_64 mmuAlexander Graf2009-12-271-1/+21
| | | | | | | | | | | | | | | | | | | | | | We were shifting the Ks/Kp/N bits one bit too far on mtsrin. It took me some time to figure that out, so I also put in some debugging and a comment explaining the conversion. This fixes current OpenBIOS boot on PPC64 KVM. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
* | vhost_net: a kernel-level virtio serverMichael S. Tsirkin2010-01-151-0/+1
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | What it is: vhost net is a character device that can be used to reduce the number of system calls involved in virtio networking. Existing virtio net code is used in the guest without modification. There's similarity with vringfd, with some differences and reduced scope - uses eventfd for signalling - structures can be moved around in memory at any time (good for migration, bug work-arounds in userspace) - write logging is supported (good for migration) - support memory table and not just an offset (needed for kvm) common virtio related code has been put in a separate file vhost.c and can be made into a separate module if/when more backends appear. I used Rusty's lguest.c as the source for developing this part : this supplied me with witty comments I wouldn't be able to write myself. What it is not: vhost net is not a bus, and not a generic new system call. No assumptions are made on how guest performs hypercalls. Userspace hypervisors are supported as well as kvm. How it works: Basically, we connect virtio frontend (configured by userspace) to a backend. The backend could be a network device, or a tap device. Backend is also configured by userspace, including vlan/mac etc. Status: This works for me, and I haven't see any crashes. Compared to userspace, people reported improved latency (as I save up to 4 system calls per packet), as well as better bandwidth and CPU utilization. Features that I plan to look at in the future: - mergeable buffers - zero copy - scalability tuning: figure out the best threading model to use Note on RCU usage (this is also documented in vhost.h, near private_pointer which is the value protected by this variant of RCU): what is happening is that the rcu_dereference() is being used in a workqueue item. The role of rcu_read_lock() is taken on by the start of execution of the workqueue item, of rcu_read_unlock() by the end of execution of the workqueue item, and of synchronize_rcu() by flush_workqueue()/flush_work(). In the future we might need to apply some gcc attribute or sparse annotation to the function passed to INIT_WORK(). Paul's ack below is for this RCU usage. (Includes fixes by Alan Cox <alan@linux.intel.com>, David L Stevens <dlstevens@us.ibm.com>, Chris Wright <chrisw@redhat.com>) Acked-by: Rusty Russell <rusty@rustcorp.com.au> Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge commit 'origin/master' into nextBenjamin Herrenschmidt2009-12-092-3/+4
|\ | | | | | | | | Conflicts: include/linux/kvm.h
| * KVM: powerpc: Fix BUILD_BUG_ON conditionHollis Blanchard2009-12-031-1/+1
| | | | | | | | | | | | | | | | | | The old BUILD_BUG_ON implementation didn't work with __builtin_constant_p(). Fixing that revealed this test had been inverted for a long time without anybody noticing... Signed-off-by: Hollis Blanchard <hollisb@us.ibm.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Activate Virtualization On DemandAlexander Graf2009-12-031-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | X86 CPUs need to have some magic happening to enable the virtualization extensions on them. This magic can result in unpleasant results for users, like blocking other VMMs from working (vmx) or using invalid TLB entries (svm). Currently KVM activates virtualization when the respective kernel module is loaded. This blocks us from autoloading KVM modules without breaking other VMMs. To circumvent this problem at least a bit, this patch introduces on demand activation of virtualization. This means, that instead virtualization is enabled on creation of the first virtual machine and disabled on destruction of the last one. So using this, KVM can be easily autoloaded, while keeping other hypervisors usable. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com> Signed-off-by: Avi Kivity <avi@redhat.com>
| * KVM: Return -ENOTTY on unrecognized ioctlsAvi Kivity2009-12-031-1/+1
| | | | | | | | | | | | Not the incorrect -EINVAL. Signed-off-by: Avi Kivity <avi@redhat.com>
| * powerpc/kvm: Remove problematic BUILD_BUG_ON statementBenjamin Herrenschmidt2009-11-051-0/+4
| | | | | | | | Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/kvm: Sync guest visible MMU stateAlexander Graf2009-12-084-15/+77
| | | | | | | | | | | | | | | | | | | | | | | | | | Currently userspace has no chance to find out which virtual address space we're in and resolve addresses. While that is a big problem for migration, it's also unpleasent when debugging, as gdb and the monitor don't work on virtual addresses. This patch exports enough of the MMU segment state to userspace to make debugging work and thus also includes the groundwork for migration. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | powerpc/kvm: Fix non-modular buildBenjamin Herrenschmidt2009-11-051-0/+1
| | | | | | | | Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
* | Merge branch 'kvm' into nextBenjamin Herrenschmidt2009-11-0515-25/+3448
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| * | Use hrtimers for the decrementerAlexander Graf2009-11-052-9/+29
| | | | | | | | | | | | | | | | | | | | | | | | Following S390's good example we should use hrtimers for the decrementer too! This patch converts the timer from the old mechanism to hrtimers. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | Fix trace.hAlexander Graf2009-11-051-3/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It looks like the variable "pc" is defined. At least the current code always failed on me stating that "pc" is already defined somewhere else. Let's use _pc instead, because that doesn't collide. Is this the right approach? Does it break on 440 too? If not, why not? Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | Include Book3s_64 target in buildsystemAlexander Graf2009-11-052-4/+40
| | | | | | | | | | | | | | | | | | | | | | | | Now we have everything in place to be able to build KVM, so let's add it as config option and in the Makefile. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | Export KVM symbols for moduleAlexander Graf2009-11-051-0/+24
| | | | | | | | | | | | | | | | | | | | | | | | To be able to keep KVM as module, we need to export the SLB trampoline addresses to the module, so it knows where to jump to. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | Add desktop PowerPC specific emulationAlexander Graf2009-11-051-10/+39
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Little opcodes behave differently on desktop and embedded PowerPC cores. In order to reflect those differences, let's add some #ifdef code to emulate.c. We could probably also handle them in the core specific emulation files, but I would prefer to reuse as much code as possible. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | Add mfdec emulationAlexander Graf2009-11-051-1/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We support setting the DEC to a certain value right now. Doing that basically triggers the CPU local timer. But there's also an mfdec command that enabled the OS to read the decrementor. This is required at least by all desktop and server PowerPC Linux kernels. It can't really hurt to allow embedded ones to do it as well though. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
| * | Add book3s_64 specific opcode emulationAlexander Graf2009-11-051-0/+337
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | There are generic parts of PowerPC that can be shared across all implementations and specific parts that only apply to BookE or desktop PPCs. This patch adds emulation for desktop specific opcodes that don't apply to BookE CPUs. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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