- 06 10月, 2012 12 次提交
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由 Paul Mackerras 提交于
Now that we have an architecture-specific field in the kvm_memory_slot structure, we can use it to store the array of page physical addresses that we need for Book3S HV KVM on PPC970 processors. This reduces the size of struct kvm_arch for Book3S HV, and also reduces the size of struct kvm_arch_memory_slot for other PPC KVM variants since the fields in it are now only compiled in for Book3S HV. This necessitates making the kvm_arch_create_memslot and kvm_arch_free_memslot operations specific to each PPC KVM variant. That in turn means that we now don't allocate the rmap arrays on Book3S PR and Book E. Since we now unpin pages and free the slot_phys array in kvmppc_core_free_memslot, we no longer need to do it in kvmppc_core_destroy_vm, since the generic code takes care to free all the memslots when destroying a VM. We now need the new memslot to be passed in to kvmppc_core_prepare_memory_region, since we need to initialize its arch.slot_phys member on Book3S HV. Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
Requests may want to tell us that we need to go back into host state, so add a return value for the checks. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
Our prepare_to_enter helper wants to be able to return in more circumstances to the host than only when an interrupt is pending. Broaden the interface a bit and move even more generic code to the generic helper. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
We need to call kvm_guest_enter in booke and book3s, so move its call to generic code. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
Today, we disable preemption while inside guest context, because we need to expose to the world that we are not in a preemptible context. However, during that time we already have interrupts disabled, which would indicate that we are in a non-preemptible context. The reason the checks for irqs_disabled() fail for us though is that we manually control hard IRQs and ignore all the lazy EE framework. Let's stop doing that. Instead, let's always use lazy EE to indicate when we want to disable IRQs, but do a special final switch that gets us into EE disabled, but soft enabled state. That way when we get back out of guest state, we are immediately ready to process interrupts. This simplifies the code drastically and reduces the time that we appear as preempt disabled. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
When getting out of __vcpu_run, let's be consistent about the state we return in. We want to always * have IRQs enabled * have called kvm_guest_exit before Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
When going out of guest mode, indicate that we are in vcpu->mode. That way requests from other CPUs don't needlessly need to kick us to process them, because it'll just happen next time we enter the guest. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
The x86 implementation of KVM accounts for host time while processing guest exits. Do the same for us. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
Now that we use our generic exit helper, we can safely drop our previous kvm_resched that we used to trigger at the beginning of the exit handler function. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
Now that we have very simple MMU Notifier support for e500 in place, also add the same simple support to book3s. It gets us one step closer to actual fast support. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
We need to do the same things when preparing to enter a guest for booke and book3s_pr cores. Fold the generic code into a generic function that both call. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
We want to have tracing information on guest exits for booke as well as book3s. Since most information is identical, use a common trace point. Signed-off-by: NAlexander Graf <agraf@suse.de>
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- 06 8月, 2012 1 次提交
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由 Xiao Guangrong 提交于
After commit a2766325, the error page is replaced by the error code, it need not be released anymore [ The patch has been compiling tested for powerpc ] Signed-off-by: NXiao Guangrong <xiaoguangrong@linux.vnet.ibm.com> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 06 5月, 2012 3 次提交
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由 Benjamin Herrenschmidt 提交于
This is necessary for qemu to be able to pass the right information to the guest, such as the supported page sizes and corresponding encodings in the SLB and hash table, which can vary depending on the processor type, the type of KVM used (PR vs HV) and the version of KVM Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> [agraf: fix compilation on hv, adjust for newer ioctl numbers] Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Benjamin Herrenschmidt 提交于
There is nothing in the code for emulating TCE tables in the kernel that prevents it from working on "PR" KVM... other than ifdef's and location of the code. This and moves the bulk of the code there to a new file called book3s_64_vio.c. This speeds things up a bit on my G5. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> [agraf: fix for hv kvm, 32bit, whitespace] Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
While handling an exit, we should listen for interrupts and make sure to receive them when they arrive, to keep our latencies low. Signed-off-by: NAlexander Graf <agraf@suse.de>
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- 08 4月, 2012 4 次提交
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由 Benjamin Herrenschmidt 提交于
When the kernel calls into RTAS, it switches to 32-bit mode. The magic page was is longer accessible in that case, causing the patched instructions in the RTAS call wrapper to crash. This fixes it by making available a 32-bit mapping of the magic page in that case. This mapping is flushed whenever we switch the kernel back to 64-bit mode. Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org> [agraf: add a check if the magic page is mapped] Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alexander Graf 提交于
When running kvm_vcpu_block and it realizes that the CPU is actually good to run, we get a request bit set for KVM_REQ_UNHALT. Right now, there's nothing we can do with that bit, so let's unset it right after the call again so we don't get confused in our later checks for pending work. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alexander Graf 提交于
When running PR KVM on a p7 system in bare metal, we get HV exits instead of normal supervisor traps. Semantically they are identical though and the HSRR vs SRR difference is already taken care of in the exit code. So all we need to do is handle them in addition to our normal exits. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alexander Graf 提交于
When emulating updating load/store instructions (lwzu, stwu, ...) we need to write the effective address of the load/store into a register. Currently, we write the physical address in there, which is very wrong. So instead let's save off where the virtual fault was on MMIO and use that information as value to put into the register. While at it, also move the XOP variants of the above instructions to the new scheme of using the already known vaddr instead of calculating it themselves. Reported-by: NJörg Sommer <joerg@alea.gnuu.de> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 03 4月, 2012 2 次提交
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由 Alexander Graf 提交于
We were leaking preemption counters. Fix the code to always toggle between preempt and non-preempt properly. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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由 Alexander Graf 提交于
We were failing to compile on book3s_32 with the following errors: arch/powerpc/kvm/book3s_pr.c:883:45: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] arch/powerpc/kvm/book3s_pr.c:898:79: error: cast to pointer from integer of different size [-Werror=int-to-pointer-cast] Fix this by explicity casting the u64 to long before we use it as a pointer. Also, on PPC32 we can not use get_user/put_user for 64bit wide variables, as there is no single instruction that could load or store variables that big. So instead, we have to use copy_from/to_user which works everywhere. Reported-by: NJörg Sommer <joerg@alea.gnuu.de> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NPaul Mackerras <paulus@samba.org>
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- 02 4月, 2012 1 次提交
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由 Benjamin Herrenschmidt 提交于
Add a missing include to fix build Signed-off-by: NBenjamin Herrenschmidt <benh@kernel.crashing.org>
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- 20 3月, 2012 1 次提交
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由 Cong Wang 提交于
Signed-off-by: NCong Wang <amwang@redhat.com>
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- 05 3月, 2012 9 次提交
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由 Paul Mackerras 提交于
This moves the get/set_one_reg implementation down from powerpc.c into booke.c, book3s_pr.c and book3s_hv.c. This avoids #ifdefs in C code, but more importantly, it fixes a bug on Book3s HV where we were accessing beyond the end of the kvm_vcpu struct (via the to_book3s() macro) and corrupting memory, causing random crashes and file corruption. On Book3s HV we only accept setting the HIOR to zero, since the guest runs in supervisor mode and its vectors are never offset from zero. Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NAlexander Graf <agraf@suse.de> [agraf update to apply on top of changed ONE_REG patches] Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alexander Graf 提交于
Until now, we always set HIOR based on the PVR, but this is just wrong. Instead, we should be setting HIOR explicitly, so user space can decide what the initial HIOR value is - just like on real hardware. We keep the old PVR based way around for backwards compatibility, but once user space uses the SET_ONE_REG based method, we drop the PVR logic. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Paul Mackerras 提交于
This changes the implementation of kvm_vm_ioctl_get_dirty_log() for Book3s HV guests to use the hardware C (changed) bits in the guest hashed page table. Since this makes the implementation quite different from the Book3s PR case, this moves the existing implementation from book3s.c to book3s_pr.c and creates a new implementation in book3s_hv.c. That implementation calls kvmppc_hv_get_dirty_log() to do the actual work by calling kvm_test_clear_dirty on each page. It iterates over the HPTEs, clearing the C bit if set, and returns 1 if any C bit was set (including the saved C bit in the rmap entry). Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alexander Graf 提交于
As Scott put it: > If we get a signal after the check, we want to be sure that we don't > receive the reschedule IPI until after we're in the guest, so that it > will cause another signal check. we need to have interrupts disabled from the point we do signal_check() all the way until we actually enter the guest. This patch fixes potential signal loss races. Reported-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alexander Graf 提交于
When running the 64-bit Book3s PR code without CONFIG_PREEMPT_NONE, we were doing a few things wrong, most notably access to PACA fields without making sure that the pointers stay stable accross the access (preempt_disable()). This patch moves to_svcpu towards a get/put model which allows us to disable preemption while accessing the shadow vcpu fields in the PACA. That way we can run preemptible and everyone's happy! Reported-by: NJörg Sommer <joerg@alea.gnuu.de> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alexander Graf 提交于
Somewhere during merges we ended up from local_irq_enable() foo(); local_irq_disable() to always keeping irqs enabled during that part. However, we now have the following code: foo(); local_irq_disable() which disables interrupts without the surrounding code enabling them again! So let's remove that disable and be happy. Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Alexander Graf 提交于
When entering the guest, we want to make sure we're not getting preempted away, so let's disable preemption on entry, but enable it again while handling guest exits. Reported-by: NJörg Sommer <joerg@alea.gnuu.de> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Scott Wood 提交于
This function should be called with interrupts disabled, to avoid a race where an exception is delivered after we check, but the resched kick is received before we disable interrupts (and thus doesn't actually trigger the exit code that would recheck exceptions). booke already does this properly in the lightweight exit case, but not on initial entry. For now, move the call of prepare_to_enter into subarch-specific code so that booke can do the right thing here. Ideally book3s would do the same thing, but I'm having a hard time seeing where it does any interrupt disabling of this sort (plus it has several additional call sites), so I'm deferring the book3s fix to someone more familiar with that code. book3s behavior should be unchanged by this patch. Signed-off-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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由 Scott Wood 提交于
This function also updates paravirt int_pending, so rename it to be more obvious that this is a collection of checks run prior to (re)entering a guest. Signed-off-by: NScott Wood <scottwood@freescale.com> Signed-off-by: NAlexander Graf <agraf@suse.de> Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 26 12月, 2011 1 次提交
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由 Andreas Schwab 提交于
kvmppc_h_pr is only available if CONFIG_KVM_BOOK3S_64_PR. Signed-off-by: NAndreas Schwab <schwab@linux-m68k.org> Signed-off-by: NAlexander Graf <agraf@suse.de>
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- 17 11月, 2011 1 次提交
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由 Alexander Graf 提交于
This reverts commit a15bd354. It exceeded the padding on the SREGS struct, rendering the ABI backwards-incompatible. Conflicts: arch/powerpc/kvm/powerpc.c include/linux/kvm.h Signed-off-by: NAvi Kivity <avi@redhat.com>
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- 01 11月, 2011 1 次提交
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由 Paul Gortmaker 提交于
Fix failures in powerpc associated with the previously allowed implicit module.h presence that now lead to things like this: arch/powerpc/mm/mmu_context_hash32.c:76:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL' arch/powerpc/mm/tlb_hash32.c:48:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL' arch/powerpc/kernel/pci_32.c:51:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL_GPL' arch/powerpc/kernel/iomap.c:36:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL' arch/powerpc/platforms/44x/canyonlands.c:126:1: error: type defaults to 'int' in declaration of 'EXPORT_SYMBOL' arch/powerpc/kvm/44x.c:168:59: error: 'THIS_MODULE' undeclared (first use in this function) [with several contibutions from Stephen Rothwell <sfr@canb.auug.org.au>] Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
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- 26 9月, 2011 4 次提交
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由 Paul Mackerras 提交于
This simplifies the way that the book3s_pr makes the transition to real mode when entering the guest. We now call kvmppc_entry_trampoline (renamed from kvmppc_rmcall) in the base kernel using a normal function call instead of doing an indirect call through a pointer in the vcpu. If kvm is a module, the module loader takes care of generating a trampoline as it does for other calls to functions outside the module. kvmppc_entry_trampoline then disables interrupts and jumps to kvmppc_handler_trampoline_enter in real mode using an rfi[d]. That then uses the link register as the address to return to (potentially in module space) when the guest exits. This also simplifies the way that we call the Linux interrupt handler when we exit the guest due to an external, decrementer or performance monitor interrupt. Instead of turning on the MMU, then deciding that we need to call the Linux handler and turning the MMU back off again, we now go straight to the handler at the point where we would turn the MMU on. The handler will then return to the virtual-mode code (potentially in the module). Along the way, this moves the setting and clearing of the HID5 DCBZ32 bit into real-mode interrupts-off code, and also makes sure that we clear the MSR[RI] bit before loading values into SRR0/1. The net result is that we no longer need any code addresses to be stored in vcpu->arch. Signed-off-by: NPaul Mackerras <paulus@samba.org> Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
There are multiple features in PowerPC KVM that can now be enabled depending on the user's wishes. Some of the combinations don't make sense or don't work though. So this patch adds a way to check if the executing environment would actually be able to run the guest properly. It also adds sanity checks if PVR is set (should always be true given the current code flow), if PAPR is only used with book3s_64 where it works and that HV KVM is only used in PAPR mode. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
PAPR defines hypercalls as SC1 instructions. Using these, the guest modifies page tables and does other privileged operations that it wouldn't be allowed to do in supervisor mode. This patch adds support for PR KVM to trap these instructions and route them through the same PAPR hypercall interface that we already use for HV style KVM. Signed-off-by: NAlexander Graf <agraf@suse.de>
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由 Alexander Graf 提交于
Until now, we always set HIOR based on the PVR, but this is just wrong. Instead, we should be setting HIOR explicitly, so user space can decide what the initial HIOR value is - just like on real hardware. We keep the old PVR based way around for backwards compatibility, but once user space uses the SREGS based method, we drop the PVR logic. Signed-off-by: NAlexander Graf <agraf@suse.de>
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