- 19 May, 2010 2 commits
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Gui Jianfeng authored
kvm_mmu_remove_one_alloc_mmu_page() assumes kvm_mmu_zap_page() only reclaims only one sp, but that's not the case. This will cause mmu shrinker returns a wrong number. This patch fix the counting error. Signed-off-by:
Gui Jianfeng <guijianfeng@cn.fujitsu.com> Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com>
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Eric Northup authored
For TDP mode, avoid creating multiple page table roots for the single guest-to-host physical address map by fixing the inputs used for the shadow page table hash in mmu_alloc_roots(). Signed-off-by:
Eric Northup <digitaleric@google.com> Signed-off-by:
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- 17 May, 2010 38 commits
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Avi Kivity authored
Reported by Andrew Jones. Signed-off-by:
Avi Kivity <avi@redhat.com> Signed-off-by:
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Avi Kivity authored
Acked-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Gui Jianfeng authored
sp->unsync is bool now, so update trace event declaration. Signed-off-by:
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Joerg Roedel authored
This patch prevents MCE intercepts from being propagated into the L1 guest if they happened in an L2 guest. Signed-off-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
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Joerg Roedel authored
This patch adds logic to kvm/x86 which allows to mark an injected exception as reinjected. This allows to remove an ugly hack from svm_complete_interrupts that prevented exceptions from being reinjected at all in the nested case. The hack was necessary because an reinjected exception into the nested guest could cause a nested vmexit emulation. But reinjected exceptions must not intercept. The downside of the hack is that a exception that in injected could get lost. This patch fixes the problem and puts the code for it into generic x86 files because. Nested-VMX will likely have the same problem and could reuse the code. Signed-off-by:
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Joerg Roedel authored
This patch implements the reporting of the emulated SVM features to userspace instead of the real hardware capabilities. Every real hardware capability needs emulation in nested svm so the old behavior was broken. Cc: stable@kernel.org Signed-off-by:
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Joerg Roedel authored
This patch adds the get_supported_cpuid callback to kvm_x86_ops. It will be used in do_cpuid_ent to delegate the decission about some supported cpuid bits to the architecture modules. Cc: stable@kernel.org Signed-off-by:
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Joerg Roedel authored
This patch implements propagation of a failes guest vmrun back into the guest instead of killing the whole guest. Signed-off-by:
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Joerg Roedel authored
This patch syncs cr0 and cr3 from the vmcb to the kvm state before nested intercept handling is done. This allows to simplify the vmexit path. Signed-off-by:
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Joerg Roedel authored
This patch fixes a bug where a nested guest always went over the same instruction because the rip was not advanced on a nested vmexit. Signed-off-by:
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Joerg Roedel authored
The patch introducing nested nmi handling had a bug. The check does not belong to enable_nmi_window but must be in nmi_allowed. This patch fixes this. Signed-off-by:
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Avi Kivity authored
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Takuya Yoshikawa authored
As Avi pointed out, testing bit part in mark_page_dirty() was important in the days of shadow paging, but currently EPT and NPT has already become common and the chance of faulting a page more that once per iteration is small. So let's remove the test bit to avoid extra access. Signed-off-by:
Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by:
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Avi Kivity authored
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Lai Jiangshan authored
Fix bug of the exception path, free allocated vpid when fail to create vcpu. Signed-off-by:
Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by:
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Alexander Graf authored
When we're on a paired single capable host, we can just always enable paired singles and expose them to the guest directly. This approach breaks when multiple VMs run and access PS concurrently, but this should suffice until we get a proper framework for it in Linux. Signed-off-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
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Alexander Graf authored
For KVM we need to find the location of the HTAB. We can either rely on internal data structures of the kernel or ask the hardware. Ben issued complaints about the internal data structure method, so let's switch it to our own inquiry of the HTAB. Now we're fully independend :-). CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Alexander Graf authored
We have some debug output in Book3S_64. Some of that was invalid though, partially not even compiling because it accessed incorrect variables. So let's fix that up, making debugging more fun again. Signed-off-by:
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Alexander Graf authored
Book3S_64 didn't set VSID_PR when we're in PR=1. This lead to pretty bad behavior when searching for the shadow segment, as part of the code relied on VSID_PR being set. This patch fixes booting Book3S_64 guests. Signed-off-by:
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Alexander Graf authored
We have a condition in the ppc64 host mmu code that should never occur. Unfortunately, it just did happen to me and I was rather puzzled on why, because BUG_ON doesn't tell me anything useful. So let's add some more debug output in case this goes wrong. Also change BUG to WARN, since I don't want to reboot every time I mess something up. Signed-off-by:
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Alexander Graf authored
In the process of merging Book3S_32 and 64 I somehow ended up having the alignment interrupt handler take last_inst, but the fetching code not fetching it. So we ended up with stale last_inst values. Let's just enable last_inst fetching for alignment interrupts too. Signed-off-by:
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Alexander Graf authored
When in split mode, instruction relocation and data relocation are not equal. So far we implemented this mode by reserving a special pseudo-VSID for the two cases and flushing all PTEs when going into split mode, which is slow. Unfortunately 32bit Linux and Mac OS X use split mode extensively. So to not slow down things too much, I came up with a different idea: Mark the split mode with a bit in the VSID and then treat it like any other segment. This means we can just flush the shadow segment cache, but keep the PTEs intact. I verified that this works with ppc32 Linux and Mac OS X 10.4 guests and does speed them up. Signed-off-by:
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Alexander Graf authored
When we get a performance counter interrupt we need to route it on to the Linux handler after we got out of the guest context. We also need to tell our handling code that this particular interrupt doesn't need treatment. So let's add those two bits in, making perf work while having a KVM guest running. Signed-off-by:
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Alexander Graf authored
There are some pieces in the code that I overlooked that still use u64s instead of longs. This slows down 32 bit hosts unnecessarily, so let's just move them to ulong. Signed-off-by:
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Alexander Graf authored
Now that we have all the bits and pieces in place, let's enable building of the Book3S_32 target. Signed-off-by:
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Alexander Graf authored
When an interrupt occurs we don't know yet if we're in guest context or in host context. When in guest context, KVM needs to handle it. So let's pull the same trick we did on Book3S_64: Just add a macro to determine if we're in guest context or not and if so jump on to KVM code. CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Alexander Graf authored
We have a define on what the highest bit of IRQ priorities is. So we can just as well use it in the bit checking code and avoid invalid IRQ values to be triggered. Signed-off-by:
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Alexander Graf authored
We need the SWITCH_FRAME_SIZE define on Book3S_32 now too. So let's export it unconditionally. CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Alexander Graf authored
Our shadow MMU code needs to know where the HTAB is located and how big it is. So we need some variables from the kernel exported to module space if KVM is built as a module. CC: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by:
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Alexander Graf authored
Some code we had so far required defines and had code that was completely Book3S_64 specific. Since we now opened book3s.c to Book3S_32 too, we need to take care of these pieces. So let's add some minor code where it makes sense to not go the Book3S_64 code paths and add compat defines on others. Signed-off-by:
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Alexander Graf authored
Book3S_32 doesn't know about segment faults. It only knows about page faults. So in order to know that we didn't map a segment, we need to fake segment faults. We do this by setting invalid segment registers to an invalid VSID and then check for that VSID on normal page faults. Signed-off-by:
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Alexander Graf authored
We need to keep the pointer to the shadow vcpu somewhere accessible from within really early interrupt code. The best fit I found was the thread struct, as that resides in an SPRG. So let's put a pointer to the shadow vcpu in the thread struct and add an asm-offset so we can find it. Signed-off-by:
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Alexander Graf authored
When instruction fetch failed, the inline function hook automatically detects that and starts the internal guest memory load function. So whenever we access kvmppc_get_last_inst(), we're sure the result is sane. Signed-off-by:
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Alexander Graf authored
When we mapped a page as read-only, we can just release it as clean to KVM's page claim mechanisms, because we're pretty sure it hasn't been touched. Signed-off-by:
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Alexander Graf authored
We just introduced generic segment switching code that only needs to call small macros to do the actual switching, but keeps most of the entry / exit code generic. So let's move the SLB switching code over to use this new mechanism. Signed-off-by:
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Alexander Graf authored
Since we now have several fields in the shadow VCPU, we also change the internal calling convention between the different entry/exit code layers. Let's reflect that in the IR=1 code and make sure we use "long" defines for long field access. Signed-off-by:
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Alexander Graf authored
The real mode handler code was originally writen for 64 bit Book3S only. But since we not add 32 bit functionality too, we need to make some tweaks to it. This patch basically combines using the "long" access defines and using fields from the shadow VCPU we just moved there. Signed-off-by:
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Alexander Graf authored
The host shadow mmu code needs to get initialized. It needs to fetch a segment it can use to put shadow PTEs into. That initialization code was in generic code, which is icky. Let's move it over to the respective MMU file. Signed-off-by:
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