- 01 Mar, 2010 40 commits
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Alexander Graf authored
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>
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Alexander Graf authored
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:
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Alexander Graf authored
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:
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Takuya Yoshikawa authored
The explanation of write_emulated is confused with that of read_emulated. This patch fix it. Signed-off-by:
Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com>
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Sheng Yang authored
Signed-off-by:
Sheng Yang <sheng@linux.intel.com> Signed-off-by:
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Sheng Yang authored
Then the callback can provide the maximum supported large page level, which is more flexible. Also move the gb page support into x86_64 specific. Signed-off-by:
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Sheng Yang authored
We can use them in x86.c and vmx.c now... Signed-off-by:
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Alexander Graf authored
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:
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Alexander Graf authored
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:
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Avi Kivity authored
When the guest acknowledges an interrupt, it sends an EOI message to the local apic, which broadcasts it to the ioapic. To handle the EOI, we need to take the ioapic mutex. On large guests, this causes a lot of contention on this mutex. Since large guests usually don't route interrupts via the ioapic (they use msi instead), this is completely unnecessary. Avoid taking the mutex by introducing a handled_vectors bitmap. Before taking the mutex, check if the ioapic was actually responsible for the acked vector. If not, we can return early. Signed-off-by:
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Avi Kivity authored
Some exit reasons missed their strings; fill out the table. Signed-off-by:
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Avi Kivity authored
With slots_lock converted to rcu, the entire kvm hotpath on modern processors (with npt or ept) now scales beautifully. Increase the maximum vcpu count to 64 to reflect this. Signed-off-by:
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Marcelo Tosatti authored
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Marcelo Tosatti authored
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Marcelo Tosatti authored
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Marcelo Tosatti authored
Using a similar two-step procedure as for memslots. Signed-off-by: -
Marcelo Tosatti authored
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Marcelo Tosatti authored
Use two steps for memslot deletion: mark the slot invalid (which stops instantiation of new shadow pages for that slot, but allows destruction), then instantiate the new empty slot. Also simplifies kvm_handle_hva locking. Signed-off-by: -
Marcelo Tosatti authored
So its possible to iommu map a memslot before making it visible to kvm. Signed-off-by: -
Marcelo Tosatti authored
Which takes a memslot pointer instead of using kvm->memslots. To be used by SRCU convertion later. Signed-off-by: -
Marcelo Tosatti authored
Required for SRCU convertion later. Signed-off-by: -
Marcelo Tosatti authored
Have a pointer to an allocated region inside x86's kvm_arch. Signed-off-by: -
Marcelo Tosatti authored
Have a pointer to an allocated region inside struct kvm. [alex: fix ppc book 3s] Signed-off-by:
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Wu Fengguang authored
Signed-off-by:
Wu Fengguang <fengguang.wu@intel.com> Signed-off-by:
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Alexander Graf authored
Progress on KVM for Embedded PowerPC has stalled, but for Book3S there's quite a lot of work to do and going on. So in agreement with Hollis and Avi, we should switch maintainers for PowerPC. Signed-off-by:
Hollis Blanchard <hollis@penguinppc.org> Signed-off-by:
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Alexander Graf authored
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:
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Alexander Graf authored
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:
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Alexander Graf authored
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:
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Avi Kivity authored
- add destructor function - move related allocation into constructor - add stubs for !CONFIG_KVM_MMIO Signed-off-by: -
Avi Kivity authored
s390 doesn't have mmio, this will simplify ifdefing it out. Signed-off-by: -
Avi Kivity authored
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Avi Kivity authored
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Avi Kivity authored
They aren't related. Signed-off-by: -
Joerg Roedel authored
The tsc_offset adjustment in svm_vcpu_load is executed unconditionally even if Linux considers the host tsc as stable. This causes a Linux guest detecting an unstable tsc in any case. This patch removes the tsc_offset adjustment if the host tsc is stable. The guest will now get the benefit of a stable tsc too. Signed-off-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
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Sheng Yang authored
Before enabling, execution of "rdtscp" in guest would result in #UD. Signed-off-by:
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Sheng Yang authored
Sometime, we need to adjust some state in order to reflect guest CPUID setting, e.g. if we don't expose rdtscp to guest, we won't want to enable it on hardware. cpuid_update() is introduced for this purpose. Also export kvm_find_cpuid_entry() for later use. Signed-off-by:
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Sheng Yang authored
KVM need vsyscall_init() to initialize MSR_TSC_AUX before it read the value. Per Avi's suggestion, this patch raised vsyscall priority on hotplug notifier chain, to 30. CC: Ingo Molnar <mingo@elte.hu> CC: linux-kernel@vger.kernel.org Signed-off-by:
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Sheng Yang authored
shared_msr_global saved host value of relevant MSRs, but it have an assumption that all MSRs it tracked shared the value across the different CPUs. It's not true with some MSRs, e.g. MSR_TSC_AUX. Extend it to per CPU to provide the support of MSR_TSC_AUX, and more alike MSRs. Notice now the shared_msr_global still have one assumption: it can only deal with the MSRs that won't change in host after KVM module loaded. Signed-off-by:
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Sheng Yang authored
It's no longer necessary. Signed-off-by:
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Avi Kivity authored
ept_update_paging_mode_cr4() accesses vcpu->arch.cr4 directly, which usually needs to be accessed via kvm_read_cr4(). In this case, we can't, since cr4 is in the process of being updated. Instead of adding inane comments, fold the function into its caller (vmx_set_cr4), so it can use the not-yet-committed cr4 directly. Signed-off-by:
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