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2014-07-21KVM: s390: remove _bh locking from start_stop_lockDavid Hildenbrand
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: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-21KVM: s390: remove _bh locking from local_int.lockDavid Hildenbrand
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: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-21KVM: s390: cleanup handle_wait by reusing kvm_vcpu_blockDavid Hildenbrand
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: David Hildenbrand <dahi@linux.vnet.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Acked-by: Cornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-10KVM: s390: implement KVM_(S|G)ET_MP_STATE for user space state controlDavid Hildenbrand
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 <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-10KVM: prepare for KVM_(S|G)ET_MP_STATE on other architecturesDavid Hildenbrand
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: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-10KVM: s390: remove __cpu_is_stopped and expose is_vcpu_stoppedDavid Hildenbrand
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: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Acked-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-10KVM: s390: move finalization of SIGP STOP orders to kvm_s390_vcpu_stopDavid Hildenbrand
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: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-07-10KVM: s390: allow only one SIGP STOP (AND STORE STATUS) at a timeDavid Hildenbrand
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: David Hildenbrand <dahi@linux.vnet.ibm.com> Reviewed-by: Cornelia Huck <cornelia.huck@de.ibm.com> Reviewed-by: Christian Borntraeger <borntraeger@de.ibm.com> Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
2014-06-30arch: x86: kvm: x86.c: Cleaning up variable is set more than onceRickard Strandqvist
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>
2014-06-30MIPS: KVM: Remove dead code of TLB index error in kvm_mips_emul_tlbwr()Deng-Cheng Zhu
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: James Hogan <james.hogan@imgtec.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-30MIPS: KVM: Skip memory cleaning in kvm_mips_commpage_init()Deng-Cheng Zhu
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: James Hogan <james.hogan@imgtec.com> Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-30MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_"Deng-Cheng Zhu
Since all the files are in arch/mips/kvm/, there's no need of the prefixes "kvm_" and "kvm_mips_". Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-30MIPS: KVM: Remove unneeded volatileDeng-Cheng Zhu
The keyword volatile for idx in the TLB functions is unnecessary. Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-30MIPS: KVM: Simplify functions by removing redundancyDeng-Cheng Zhu
No logic changes inside. Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-30MIPS: KVM: Use KVM internal loggerDeng-Cheng Zhu
Replace printks with kvm_[err|info|debug]. Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-30MIPS: KVM: Reformat code and commentsDeng-Cheng Zhu
No logic changes inside. Signed-off-by: Deng-Cheng Zhu <dengcheng.zhu@imgtec.com> Reviewed-by: James Hogan <james.hogan@imgtec.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-30Merge tag 'kvms390-20140626' of ↵Paolo Bonzini
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.
2014-06-30Merge commit '33b458d276bb' into kvm-nextPaolo Bonzini
Fix bad x86 regression introduced during merge window.
2014-06-30KVM: SVM: Fix CPL export via SS.DPLJan Kiszka
We import the CPL via SS.DPL since ae9fedc793. 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: Paolo Bonzini <pbonzini@redhat.com>
2014-06-26KVM: s390: add sie.h uapi header file to Kbuild and remove header dependencyHeiko Carstens
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 ceae283bb2e0176c "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: Cornelia Huck <cornelia.huck@de.ibm.com>
2014-06-19KVM: vmx: vmx instructions handling does not consider cs.lNadav Amit
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: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: vmx: handle_cr ignores 32/64-bit modeNadav Amit
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: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: x86: Hypercall handling does not considers opsize correctlyNadav Amit
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: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: x86: check DR6/7 high-bits are clear only on long-modeNadav Amit
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: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: nVMX: Fix returned value of MSR_IA32_VMX_VMCS_ENUMJan Kiszka
Many real CPUs get this wrong as well, but ours is totally off: bits 9:1 define the highest index value. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: nVMX: Allow to disable VM_{ENTRY_LOAD,EXIT_SAVE}_DEBUG_CONTROLSJan Kiszka
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 <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: nVMX: Fix returned value of MSR_IA32_VMX_PROCBASED_CTLSJan Kiszka
SDM says bits 1, 4-6, 8, 13-16, and 26 have to be set. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: nVMX: Allow to disable CR3 access interceptionJan Kiszka
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: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: nVMX: Advertise support for MSR_IA32_VMX_TRUE_*_CTLSJan Kiszka
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: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: x86: Fix constant value of VM_{EXIT_SAVE,ENTRY_LOAD}_DEBUG_CONTROLSJan Kiszka
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: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: x86: NOP emulation clears (incorrectly) the high 32-bits of RAXNadav Amit
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: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: x86: emulation of dword cmov on long-mode should clear [63:32]Nadav Amit
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: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: x86: Inter-privilege level ret emulation is not implemenetedNadav Amit
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: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: x86: Wrong emulation on 'xadd X, X'Nadav Amit
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: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: x86: bit-ops emulation ignores offset on 64-bitNadav Amit
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: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19arch/x86/kvm/vmx.c: use PAGE_ALIGNED instead of IS_ALIGNED(PAGE_SIZEFabian Frederick
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: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: emulate: fix harmless typo in MMX decodingPaolo Bonzini
It was using the wrong member of the union. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-19KVM: emulate: simplify BitOp handlingPaolo Bonzini
Memory is always the destination for BitOp instructions. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: emulate: POP SS triggers a MOV SS shadow tooPaolo Bonzini
We did not do that when interruptibility was added to the emulator, because at the time pop to segment was not implemented. Now it is, add it. Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: smsw emulation is incorrect in 64-bit modeNadav Amit
In 64-bit mode, when the destination is a register, the assignment is done according to the operand size. Otherwise (memory operand or no 64-bit mode), a 16-bit assignment is performed. Currently, 16-bit assignment is always done to the destination. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: Return error on cmpxchg16b emulationNadav Amit
cmpxchg16b is currently unimplemented in the emulator. The least we can do is return error upon the emulation of this instruction. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: rdpmc emulation checks the counter incorrectlyNadav Amit
The rdpmc emulation checks that the counter (ECX) is not higher than 2, without taking into considerations bits 30:31 role (e.g., bit 30 marks whether the counter is fixed). The fix uses the pmu information for checking the validity of the pmu counter. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: movnti minimum op size of 32-bit is not keptNadav Amit
If the operand-size prefix (0x66) is used in 64-bit mode, the emulator would assume the destination operand is 64-bit, when it should be 32-bit. Reminder: movnti does not support 16-bit operands and its default operand size is 32-bit. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: cmpxchg emulation should compare in reverse orderNadav Amit
The current implementation of cmpxchg does not update the flags correctly, since the accumulator should be compared with the destination and not the other way around. The current implementation does not update the flags correctly. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: sgdt and sidt are not privilagedNadav Amit
The SGDT and SIDT instructions are not privilaged, i.e. they can be executed with CPL>0. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: Loading segments on 64-bit mode may be wrongNadav Amit
The current emulator implementation ignores the high 32 bits of the base in long-mode. During segment load from the LDT, the base of the LDT is calculated incorrectly and may cause the wrong segment to be loaded. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: Emulator ignores LDTR/TR extended base on LLDT/LTRNadav Amit
The current implementation ignores the LDTR/TR base high 32-bits on long-mode. As a result the loaded segment descriptor may be incorrect. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-18KVM: x86: Mark VEX-prefix instructions emulation as unimplementedNadav Amit
Currently the emulator does not recognize vex-prefix instructions. However, it may incorrectly decode lgdt/lidt instructions and try to execute them. This patch returns unhandlable error on their emulation. Signed-off-by: Nadav Amit <namit@cs.technion.ac.il> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2014-06-16Linux 3.16-rc1Linus Torvalds
2014-06-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/netLinus Torvalds
Pull networking fixes from David Miller: 1) Fix checksumming regressions, from Tom Herbert. 2) Undo unintentional permissions changes for SCTP rto_alpha and rto_beta sysfs knobs, from Denial Borkmann. 3) VXLAN, like other IP tunnels, should advertize it's encapsulation size using dev->needed_headroom instead of dev->hard_header_len. From Cong Wang. * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net: net: sctp: fix permissions for rto_alpha and rto_beta knobs vxlan: Checksum fixes net: add skb_pop_rcv_encapsulation udp: call __skb_checksum_complete when doing full checksum net: Fix save software checksum complete net: Fix GSO constants to match NETIF flags udp: ipv4: do not waste time in __udp4_lib_mcast_demux_lookup vxlan: use dev->needed_headroom instead of dev->hard_header_len MAINTAINERS: update cxgb4 maintainer
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