- 21 Jul, 2014 7 commits
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Cornelia Huck authored
Let's document that this is a capability that may be enabled per-vm. Signed-off-by:
Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by:
David Hildenbrand <dahi@linux.vnet.ibm.com> Signed-off-by:
Christian Borntraeger <borntraeger@de.ibm.com>
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Cornelia Huck authored
Capabilities can be enabled on a vcpu or (since recently) on a vm. Document this and note for the existing capabilites whether they are per-vcpu or per-vm. Signed-off-by:
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David Hildenbrand authored
We can get rid of the tasklet used for waking up a VCPU in the hrtimer code but wakeup the VCPU directly. Signed-off-by:
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David Hildenbrand authored
Let's move the vcpu wakeup code to a central point. We should set the vcpu->preempted flag only if the target is actually sleeping and before the real wakeup happens. Otherwise the preempted flag might be set, when not necessary. This may result in immediate reschedules after schedule() in some scenarios. The wakeup code doesn't require the local_int.lock to be held. Signed-off-by:
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David Hildenbrand authored
The start_stop_lock is no longer acquired when in atomic context, therefore we can convert it into an ordinary spin_lock. Signed-off-by:
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David Hildenbrand authored
local_int.lock is not used in a bottom-half handler anymore, therefore we can turn it into an ordinary spin_lock at all occurrences. Signed-off-by:
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David Hildenbrand authored
This patch cleans up the code in handle_wait by reusing the common code function kvm_vcpu_block. signal_pending(), kvm_cpu_has_pending_timer() and kvm_arch_vcpu_runnable() are sufficient for checking if we need to wake-up that VCPU. kvm_vcpu_block uses these functions, so no checks are lost. The flag "timer_due" can be removed - kvm_cpu_has_pending_timer() tests whether the timer is pending, thus the vcpu is correctly woken up. Signed-off-by:
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- 10 Jul, 2014 5 commits
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David Hildenbrand authored
This patch - adds s390 specific MP states to linux headers and documents them - implements the KVM_{SET,GET}_MP_STATE ioctls - enables KVM_CAP_MP_STATE - allows user space to control the VCPU state on s390. If user space sets the VCPU state using the ioctl KVM_SET_MP_STATE, we can disable manual changing of the VCPU state and trust user space to do the right thing. Signed-off-by: -
David Hildenbrand authored
Highlight the aspects of the ioctls that are actually specific to x86 and ia64. As defined restrictions (irqchip) and mp states may not apply to other architectures, these parts are flagged to belong to x86 and ia64. In preparation for the use of KVM_(S|G)ET_MP_STATE by s390. Fix a spelling error (KVM_SET_MP_STATE vs. KVM_SET_MPSTATE) on the way. Signed-off-by:
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David Hildenbrand authored
The function "__cpu_is_stopped" is not used any more. Let's remove it and expose the function "is_vcpu_stopped" instead, which is actually what we want. This patch also converts an open coded check for CPUSTAT_STOPPED to is_vcpu_stopped(). Signed-off-by:
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David Hildenbrand authored
Let's move the finalization of SIGP STOP and SIGP STOP AND STORE STATUS orders to the point where the VCPU is actually stopped. This change is needed to prepare for a user space driven VCPU state change. The action_bits may only be cleared when setting the cpu state to STOPPED while holding the local irq lock. Signed-off-by:
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David Hildenbrand authored
A SIGP STOP (AND STORE STATUS) order is complete as soon as the VCPU has been stopped. This patch makes sure that only one SIGP STOP (AND STORE STATUS) may be pending at a time (as defined by the architecture). If the action_bits are still set, a SIGP STOP has been issued but not completed yet. The VCPU is busy for further SIGP STOP orders. Also set the CPUSTAT_STOP_INT after the action_bits variable has been modified (the same order that is used when injecting a KVM_S390_SIGP_STOP from userspace). Both changes are needed in preparation for a user space driven VCPU state change (to avoid race conditions). Signed-off-by:
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- 30 Jun, 2014 11 commits
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Rickard Strandqvist authored
A struct member variable is set to the same value more than once This was found using a static code analysis program called cppcheck. Signed-off-by:
Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by:
Paolo Bonzini <pbonzini@redhat.com>
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Deng-Cheng Zhu authored
It's impossible to fall into the error handling of the TLB index after being masked by (KVM_MIPS_GUEST_TLB_SIZE - 1). Remove the dead code. Reported-by:
James Hogan <james.hogan@imgtec.com> Signed-off-by:
Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Reviewed-by:
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Deng-Cheng Zhu authored
The commpage is allocated using kzalloc(), so there's no need of cleaning the memory of the kvm_mips_commpage struct and its internal mips_coproc. Reviewed-by:
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Deng-Cheng Zhu authored
Since all the files are in arch/mips/kvm/, there's no need of the prefixes "kvm_" and "kvm_mips_". Reviewed-by:
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Deng-Cheng Zhu authored
The keyword volatile for idx in the TLB functions is unnecessary. Reviewed-by:
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Deng-Cheng Zhu authored
No logic changes inside. Reviewed-by:
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Deng-Cheng Zhu authored
Replace printks with kvm_[err|info|debug]. Signed-off-by:
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Deng-Cheng Zhu authored
No logic changes inside. Signed-off-by:
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Paolo Bonzini authored
Merge tag 'kvms390-20140626' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into HEAD Fix sie.h header related problems introduced during the 3.16 development cycle.
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Paolo Bonzini authored
Fix bad x86 regression introduced during merge window.
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Jan Kiszka authored
We import the CPL via SS.DPL since ae9fedc7. However, we fail to export it this way so far. This caused spurious guest crashes, e.g. of Linux when accessing the vmport from guest user space which triggered register saving/restoring to/from host user space. Signed-off-by:
Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by:
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- 26 Jun, 2014 1 commit
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Heiko Carstens authored
sie.h was missing in arch/s390/include/uapi/asm/Kbuild and therefore missed the "make headers_check" target. If added it reveals that also arch/s390/include/asm/sigp.h would become uapi. This is something we certainly do not want. So remove that dependency as well. The header file was merged with ceae283b "KVM: s390: add sie exit reasons tables", therefore we never had a kernel release with this commit and can still change anything. Acked-by:
Alexander Yarygin <yarygin@linux.vnet.ibm.com> Signed-off-by:
Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by:
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- 19 Jun, 2014 16 commits
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Nadav Amit authored
VMX instructions use 32-bit operands in 32-bit mode, and 64-bit operands in 64-bit mode. The current implementation is broken since it does not use the register operands correctly, and always uses 64-bit for reads and writes. Moreover, write to memory in vmwrite only considers long-mode, so it ignores cs.l. This patch fixes this behavior. Signed-off-by:
Nadav Amit <namit@cs.technion.ac.il> Signed-off-by:
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Nadav Amit authored
On 32-bit mode only bits [31:0] of the CR should be used for setting the CR value. Otherwise, the host may incorrectly assume the value is invalid if bits [63:32] are not zero. Moreover, the CR is currently being read twice when CR8 is used. Last, nested mov-cr exiting is modified to handle the CR value correctly as well. Signed-off-by:
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Nadav Amit authored
Currently, the hypercall handling routine only considers LME as an indication to whether the guest uses 32/64-bit mode. This is incosistent with hyperv hypercalls handling and against the common sense of considering cs.l as well. This patch uses is_64_bit_mode instead of is_long_mode for that matter. In addition, the result is masked in respect to the guest execution mode. Last, it changes kvm_hv_hypercall to use is_64_bit_mode as well to simplify the code. Signed-off-by:
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Nadav Amit authored
When the guest sets DR6 and DR7, KVM asserts the high 32-bits are clear, and otherwise injects a #GP exception. This exception should only be injected only if running in long-mode. Signed-off-by:
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Jan Kiszka authored
Many real CPUs get this wrong as well, but ours is totally off: bits 9:1 define the highest index value. Signed-off-by:
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Jan Kiszka authored
Allow L1 to "leak" its debug controls into L2, i.e. permit cleared VM_{ENTRY_LOAD,EXIT_SAVE}_DEBUG_CONTROLS. This requires to manually transfer the state of DR7 and IA32_DEBUGCTLMSR from L1 into L2 as both run on different VMCS. Signed-off-by: -
Jan Kiszka authored
SDM says bits 1, 4-6, 8, 13-16, and 26 have to be set. Signed-off-by:
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Jan Kiszka authored
We already have this control enabled by exposing a broken MSR_IA32_VMX_PROCBASED_CTLS value. This will properly advertise our capability once the value is fixed by clearing the right bits in MSR_IA32_VMX_TRUE_PROCBASED_CTLS. We also have to ensure to test the right value on L2 entry. Signed-off-by:
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Jan Kiszka authored
We already implemented them but failed to advertise them. Currently they all return the identical values to the capability MSRs they are augmenting. So there is no change in exposed features yet. Drop related comments at this chance that are partially incorrect and redundant anyway. Signed-off-by:
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Jan Kiszka authored
The spec says those controls are at bit position 2 - makes 4 as value. The impact of this mistake is effectively zero as we only use them to ensure that these features are set at position 2 (or, previously, 1) in MSR_IA32_VMX_{EXIT,ENTRY}_CTLS - which is and will be always true according to the spec. Signed-off-by: -
Nadav Amit authored
On long-mode the current NOP (0x90) emulation still writes back to RAX. As a result, EAX is zero-extended and the high 32-bits of RAX are cleared. Signed-off-by:
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Nadav Amit authored
Even if the condition of cmov is not satisfied, bits[63:32] should be cleared. This is clearly stated in Intel's CMOVcc documentation. The solution is to reassign the destination onto itself if the condition is unsatisfied. For that matter the original destination value needs to be read. Signed-off-by:
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Nadav Amit authored
Return unhandlable error on inter-privilege level ret instruction. This is since the current emulation does not check the privilege level correctly when loading the CS, and does not pop RSP/SS as needed. Cc: stable@vger.kernel.org Signed-off-by:
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Nadav Amit authored
The emulator does not emulate the xadd instruction correctly if the two operands are the same. In this (unlikely) situation the result should be the sum of X and X (2X) when it is currently X. The solution is to first perform writeback to the source, before writing to the destination. The only instruction which should be affected is xadd, as the other instructions that perform writeback to the source use the extended accumlator (e.g., RAX:RDX). Signed-off-by:
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Nadav Amit authored
The current emulation of bit operations ignores the offset from the destination on 64-bit target memory operands. This patch fixes this behavior. Signed-off-by:
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Fabian Frederick authored
use mm.h definition Cc: Gleb Natapov <gleb@kernel.org> Cc: Paolo Bonzini <pbonzini@redhat.com> Signed-off-by:
Fabian Frederick <fabf@skynet.be> Signed-off-by:
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