- 17 May, 2010 5 commits
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Joerg Roedel authored
This patch optimizes the way the msrpm of the host and the guest are merged. The old code merged the 2 msrpm pages completly. This code needed to touch 24kb of memory for that operation. The optimized variant this patch introduces merges only the parts where the host msrpm may contain zero bits. This reduces the amount of memory which is touched to 48 bytes. Signed-off-by:
Joerg Roedel <joerg.roedel@amd.com> Signed-off-by:
Marcelo Tosatti <mtosatti@redhat.com>
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Joerg Roedel authored
This patch introduces a list with all msrs a guest might have direct access to and changes the svm_vcpu_init_msrpm function to use this list. It also adds a check to set_msr_interception which triggers a warning if a developer changes a msr intercept that is not in the list. Signed-off-by:
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Joerg Roedel authored
The algorithm to find the offset in the msrpm for a given msr is needed at other places too. Move that logic to its own function. Signed-off-by:
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Joerg Roedel authored
The nested_svm_exit_handled_msr() returned an bool which is a bug. I worked by accident because the exected integer return values match with the true and false values. This patch changes the return value to int and let the function return the correct values. Signed-off-by:
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Andrea Gelmini authored
arch/x86/kvm/kvm_timer.h:13: ERROR: code indent should use tabs where possible Signed-off-by:
Andrea Gelmini <andrea.gelmini@gelma.net> Signed-off-by:
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- 25 Apr, 2010 35 commits
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Gleb Natapov authored
Implement jmp far opcode ff/5. It is used by multiboot loader. Signed-off-by:
Gleb Natapov <gleb@redhat.com> Signed-off-by:
Avi Kivity <avi@redhat.com>
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Gleb Natapov authored
Add decoding of Ep type of argument used by callf/jmpf. Signed-off-by:
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Gleb Natapov authored
segment_base() is used only by vmx so move it there. Signed-off-by:
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Gleb Natapov authored
fix segment_base() to properly check for null segment selector and avoid accessing NULL pointer if ldt selector in null. Signed-off-by:
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Gleb Natapov authored
Linux now has native_store_gdt() to do the same. Use it instead of kvm local version. Signed-off-by:
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Takuya Yoshikawa authored
Marcelo introduced gfn_to_hva_memslot() when he implemented gfn_to_pfn_memslot(). Let's use this for gfn_to_hva() too. Note: also remove parentheses next to return as checkpatch said to do. Signed-off-by:
Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by:
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Joerg Roedel authored
When injecting an vmexit.intr into the nested hypervisor there might be leftover values in the exit_info fields. Clear them to not confuse nested hypervisors. Signed-off-by:
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Joerg Roedel authored
If we have the following situation with nested svm: 1. Host KVM intercepts cr0 writes 2. Guest hypervisor intercepts only selective cr0 writes Then we get an cr0 write intercept which is handled on the host. But that intercepts may actually be a selective cr0 intercept for the guest. This patch checks for this condition and injects a selective cr0 intercept if needed. Signed-off-by:
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Joerg Roedel authored
The vcpu->arch.cr0 variable is already set in the architecture specific set_cr0 callbacks. There is no need to set it in the common code. This allows the architecture code to keep the old arch.cr0 value if it wants. This is required for nested svm to decide if a selective_cr0 exit needs to be injected. Signed-off-by:
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Joerg Roedel authored
Hyper-V as a guest wants to write this bit. This patch ignores it. Signed-off-by:
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Joerg Roedel authored
This patch implements the emulation of the vm_cr msr for nested svm. Signed-off-by:
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Joerg Roedel authored
This patch adds a tracepoint to get information about the most important intercept bitmasks from the nested vmcb. Signed-off-by:
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Joerg Roedel authored
A recent change broke tracing of the nested vmcb address. It was reported as 0 all the time. This patch fixes it. Signed-off-by:
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Joerg Roedel authored
This patch implements the NMI intercept checking for nested svm. Signed-off-by:
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Joerg Roedel authored
Without resetting the MMU the gva_to_pga function will not work reliably when the vcpu is running in nested context. Signed-off-by:
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Joerg Roedel authored
This patch removes whitespace errors, fixes comment formats and most of checkpatch warnings. Now vim does not show c-space-errors anymore. Signed-off-by:
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Jan Kiszka authored
Call directly into the vendor services for getting/setting rflags in emulate_instruction to ensure injected TF survives the emulation. Signed-off-by:
Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by:
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Jan Kiszka authored
RF is not required for injecting TF as the latter will trigger only after an instruction execution anyway. So do not touch RF when arming or disarming guest single-step mode. Signed-off-by:
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Jan Kiszka authored
When in guest debugging mode, we have to reinject those #BP software exceptions that are caused by guest-injected INT3. As older AMD processors do not support the required nRIP VMCB field, try to emulate it by moving RIP past the instruction on exception injection. Fix it up again in case the injection failed and we were able to catch this. This does not work for unintercepted faults, but it is better than doing nothing. Signed-off-by:
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Jan Kiszka authored
Based on Gleb's suggestion: Add a helper kvm_is_linear_rip that matches a given linear RIP against the current one. Use this for guest single-stepping, more users will follow. Signed-off-by:
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Jan Kiszka authored
Move svm_queue_exception past skip_emulated_instruction to allow calling it later on. Signed-off-by:
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Jan Kiszka authored
This restores the deferred VCPU kicking before 956f97cf. We need this over -rt as wake_up* requires non-atomic context in this configuration. Signed-off-by:
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Alexander Graf authored
When we destory a vcpu, we should also make sure to kill all pending timers that could still be up. When not doing this, hrtimers might dereference null pointers trying to call our code. This patch fixes spontanious kernel panics seen after closing VMs. Signed-off-by:
Alexander Graf <alex@csgraf.de> Signed-off-by:
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Alexander Graf authored
While converting the kzalloc we used to allocate our vcpu struct to vmalloc, I forgot to memset the contents to zeros. That broke quite a lot. This patch memsets it to zero again. Signed-off-by:
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Jan Kiszka authored
So far user space was not able to save and restore debug registers for migration or after reset. Plug this hole. Signed-off-by:
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Jan Kiszka authored
The interrupt shadow created by STI or MOV-SS-like operations is part of the VCPU state and must be preserved across migration. Transfer it in the spare padding field of kvm_vcpu_events.interrupt. As a side effect we now have to make vmx_set_interrupt_shadow robust against both shadow types being set. Give MOV SS a higher priority and skip STI in that case to avoid that VMX throws a fault on next entry. Signed-off-by:
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Jan Kiszka authored
To avoid that user space migrates a pending software exception or interrupt, mask them out on KVM_GET_VCPU_EVENTS. Without this, user space would try to reinject them, and we would have to reconstruct the proper instruction length for VMX event injection. Now the pending event will be reinjected via executing the triggering instruction again. Signed-off-by:
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Joerg Roedel authored
The nested_svm_intr() function does not execute the vmexit anymore. Therefore we may still be in the nested state after that function ran. This patch changes the nested_svm_intr() function to return wether the irq window could be enabled. Cc: stable@kernel.org Signed-off-by:
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Gleb Natapov authored
vcpu->run is initialized on vcpu creation and can never be NULL here. Signed-off-by:
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Alexander Graf authored
We used to use get_free_pages to allocate our vcpu struct. Unfortunately that call failed on me several times after my machine had a big enough uptime, as memory became too fragmented by then. Fortunately, we don't need it to be page aligned any more! We can just vmalloc it and everything's great. Signed-off-by:
Alexander Graf <agraf@suse.de> Signed-off-by:
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Alexander Graf authored
We don't need as complex code. I had some thinkos while writing it, figuring I needed to support PPC32 paths on PPC64 which would have required DR=0, but everything just runs fine with DR=1. So let's make the functions simple C call wrappers that reserve some space on the stack for the respective functions to clobber. Fixes out-of-RMA-access (and thus guest FPU loading) on the PS3. Signed-off-by:
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Alexander Graf authored
We had code to make use of the secondary htab buckets, but kept that disabled because it was unstable when I put it in. I checked again if that's still the case and apparently it was only exposing some instability that was there anyways before. I haven't seen any badness related to usage of secondary htab entries so far. This should speed up guest memory allocations by quite a bit, because we now have more space to put PTEs in. Signed-off-by:
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Alexander Graf authored
We need to tell userspace that we can emulate paired single instructions. So let's add a capability export. Signed-off-by:
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Alexander Graf authored
The one big thing about the Gekko is paired singles. Paired singles are an extension to the instruction set, that adds 32 single precision floating point registers (qprs), some SPRs to modify the behavior of paired singled operations and instructions to deal with qprs to the instruction set. Unfortunately, it also changes semantics of existing operations that affect single values in FPRs. In most cases they get mirrored to the coresponding QPR. Thanks to that we need to emulate all FPU operations and all the new paired single operations too. In order to achieve that, we use the just introduced FPU call helpers to call the real FPU whenever the guest wants to modify an FPR. Additionally we also fix up the QPR values along the way. That way we can execute paired single FPU operations without implementing a soft fpu. Signed-off-by:
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Alexander Graf authored
When we get a program interrupt we usually don't expect it to perform an MMIO operation. But why not? When we emulate paired singles, we can end up loading or storing to an MMIO address - and the handling of those happens in the program interrupt handler. So let's teach the program interrupt handler how to deal with EMULATE_MMIO. Signed-off-by:
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