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2011-07-12KVM: PPC: e500: Eliminate shadow_pages[], and use pfns instead.Scott Wood2-39/+19
This is in line with what other architectures do, and will allow us to map things other than ordinary, unreserved kernel pages -- such as dedicated devices, or large contiguous reserved regions. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12KVM: PPC: e500: don't use MAS0 as intermediate storage.Scott Wood1-13/+13
This avoids races. It also means that we use the shadow TLB way, rather than the hardware hint -- if this is a problem, we could do a tlbsx before inserting a TLB0 entry. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12KVM: PPC: e500: Disable preloading TLB1 in tlb_load().Scott Wood1-18/+0
Since TLB1 loading doesn't check the shadow TLB before allocating another entry, you can get duplicates. Once shadow PIDs are enabled in a later patch, we won't need to invalidate the TLB on every switch, so this optimization won't be needed anyway. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12KVM: PPC: e500: Save/restore SPE stateScott Wood7-17/+148
This is done lazily. The SPE save will be done only if the guest has used SPE since the last preemption or heavyweight exit. Restore will be done only on demand, when enabling MSR_SPE in the shadow MSR, in response to an SPE fault or mtmsr emulation. For SPEFSCR, Linux already switches it on context switch (non-lazily), so the only remaining bit is to save it between qemu and the guest. Signed-off-by: Liu Yu <yu.liu@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12KVM: PPC: booke: use shadow_msrScott Wood4-13/+9
Keep the guest MSR and the guest-mode true MSR separate, rather than modifying the guest MSR on each guest entry to produce a true MSR. Any bits which should be modified based on guest MSR must be explicitly propagated from vcpu->arch.shared->msr to vcpu->arch.shadow_msr in kvmppc_set_msr(). While we're modifying the guest entry code, reorder a few instructions to bury some load latencies. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12powerpc/e500: SPE register saving: take arbitrary struct offsetScott Wood2-15/+19
Previously, these macros hardcoded THREAD_EVR0 as the base of the save area, relative to the base register passed. This base offset is now passed as a separate macro parameter, allowing reuse with other SPE save areas, such as used by KVM. Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12powerpc/e500: Save SPEFCSR in flush_spe_to_thread()yu liu3-6/+2
giveup_spe() saves the SPE state which is protected by MSR[SPE]. However, modifying SPEFSCR does not trap when MSR[SPE]=0. And since SPEFSCR is already saved/restored in _switch(), not all the callers want to save SPEFSCR again. Thus, saving SPEFSCR should not belong to giveup_spe(). This patch moves SPEFSCR saving to flush_spe_to_thread(), and cleans up the caller that needs to save SPEFSCR accordingly. Signed-off-by: Liu Yu <yu.liu@freescale.com> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12KVM: PPC: Resolve real-mode handlers through function exportsAlexander Graf4-14/+6
Up until now, Book3S KVM had variables stored in the kernel that a kernel module or the kvm code in the kernel could read from to figure out where some real mode helper functions are located. This is all unnecessary. The high bits of the EA get ignore in real mode, so we can just use the pointer as is. Also, it's a lot easier on relocations when we use the normal way of resolving the address to a function, instead of jumping through hoops. This patch fixes compilation with CONFIG_RELOCATABLE=y. Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12KVM: PPC: fix partial application of "exit timing in ticks"Stuart Yoder1-9/+0
When http://www.spinics.net/lists/kvm-ppc/msg02664.html was applied to produce commit b51e7aa7ed6d8d134d02df78300ab0f91cfff4d2, the removal of the conversion in add_exit_timing was left out. Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Alexander Graf <agraf@suse.de>
2011-07-12KVM: MMU: make kvm_mmu_reset_context() flush the guest TLBAvi Kivity1-1/+11
kvm_set_cr0() and kvm_set_cr4(), and possible other functions, assume that kvm_mmu_reset_context() flushes the guest TLB. However, it does not. Fix by flushing the tlb (and syncing the new root as well). Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: MMU: Adjust shadow paging to work when SMEP=1 and CR0.WP=0Avi Kivity3-1/+32
When CR0.WP=0, we sometimes map user pages as kernel pages (to allow the kernel to write to them). Unfortunately this also allows the kernel to fetch from these pages, even if CR4.SMEP is set. Adjust for this by also setting NX on the spte in these circumstances. Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Enable ERMS feature support for KVMYang, Wei1-1/+1
This patch exposes ERMS feature to KVM guests. The REP MOVSB/STOSB instruction can enhance fast strings attempts to move as much of the data with larger size load/stores as possible. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Expose RDWRGSFS bit to KVM guestsYang, Wei1-1/+1
This patch exposes RDWRGSFS bit to KVM guests. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Add RDWRGSFS support when setting CR4Yang, Wei1-0/+11
This patch adds RDWRGSFS support when setting CR4. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Remove RDWRGSFS bit from CR4_RESERVED_BITSYang, Wei2-1/+2
This patch removes RDWRGSFS bit from CR4_RESERVED_BITS. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Enable DRNG feature support for KVMYang, Wei Y1-1/+1
This patch exposes DRNG feature to KVM guests. The RDRAND instruction can provide software with sequences of random numbers generated from white noise. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: fix XSAVE bit scanning (now properly)Andre Przywara1-4/+5
commit 123108f1c1aafd51d6a5c79cc04d7999dd88a930 tried to fix KVMs XSAVE valid feature scanning, but it was wrong. It was not considering the sparse nature of this bitfield, instead reading values from uninitialized members of the entries array. This patch now separates subleaf indicies from KVM's array indicies and fills the entry before querying it's value. This fixes AVX support in KVM guests. Signed-off-by: Andre Przywara <andre.przywara@amd.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Fix KVM_ASSIGN_SET_MSIX_ENTRY documentationJan Kiszka1-2/+4
The documented behavior did not match the implemented one (which also never changed). Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Fix off-by-one in overflow check of KVM_ASSIGN_SET_MSIX_NRJan Kiszka1-1/+1
KVM_MAX_MSIX_PER_DEV implies that up to that many MSI-X entries can be requested. But the kernel so far rejected already the upper limit. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Add compat ioctl for KVM_SET_SIGNAL_MASKAlexander Graf2-1/+52
KVM has an ioctl to define which signal mask should be used while running inside VCPU_RUN. At least for big endian systems, this mask is different on 32-bit and 64-bit systems (though the size is identical). Add a compat wrapper that converts the mask to whatever the kernel accepts, allowing 32-bit kvm user space to set signal masks. This patch fixes qemu with --enable-io-thread on ppc64 hosts when running 32-bit user land. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Clarify KVM_ASSIGN_PCI_DEVICE documentationJan Kiszka2-13/+2
Neither host_irq nor the guest_msi struct are used anymore today. Tag the former, drop the latter to avoid confusion. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Add instruction fetch checking when walking guest page tableYang, Wei Y1-1/+8
This patch adds instruction fetch checking when walking guest page table, to implement SMEP when emulating instead of executing natively. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Shan, Haitao <haitao.shan@intel.com> Signed-off-by: Li, Xin <xin.li@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Mask function7 ebx against host capability word9Yang, Wei Y1-1/+19
This patch masks CPUID leaf 7 ebx against host capability word9. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Shan, Haitao <haitao.shan@intel.com> Signed-off-by: Li, Xin <xin.li@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Add SMEP support when setting CR4Yang, Wei Y1-2/+13
This patch adds SMEP handling when setting CR4. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Shan, Haitao <haitao.shan@intel.com> Signed-off-by: Li, Xin <xin.li@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: Remove SMEP bit from CR4_RESERVED_BITSYang, Wei Y1-1/+1
This patch removes SMEP bit from CR4_RESERVED_BITS. Signed-off-by: Yang, Wei <wei.y.yang@intel.com> Signed-off-by: Shan, Haitao <haitao.shan@intel.com> Signed-off-by: Li, Xin <xin.li@intel.com> Signed-off-by: Avi Kivity <avi@redhat.com>
2011-07-12KVM: nVMX: Fix bug preventing more than two levels of nestingNadav Har'El1-2/+2
The nested VMX feature is supposed to fully emulate VMX for the guest. This (theoretically) not only allows it to run its own guests, but also also to further emulate VMX for its own guests, and allow arbitrarily deep nesting. This patch fixes a bug (discovered by Kevin Tian) in handling a VMLAUNCH by L2, which prevented deeper nesting. Deeper nesting now works (I only actually tested L3), but is currently *absurdly* slow, to the point of being unusable. Signed-off-by: Nadav Har'El <nyh@il.ibm.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: Fixup documentation section numberingJan Kiszka1-1/+1
Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: fold decode_cache into x86_emulate_ctxtAvi Kivity4-746/+632
This saves a lot of pointless casts x86_emulate_ctxt and decode_cache. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: rename decode_cache::eip to _eipAvi Kivity4-65/+65
The name eip conflicts with a field of the same name in x86_emulate_ctxt, which we plan to fold decode_cache into. The name _eip is unfortunate, but what's really needed is a refactoring here, not a better name. Signed-off-by: Avi Kivity <avi@redhat.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: VMX: Silence warning on 32-bit hostsJan Kiszka1-0/+2
a is unused now on CONFIG_X86_32. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Use opcode::execute for CLI/STI(FA/FB)Takuya Yoshikawa1-17/+21
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Use opcode::execute for LOOP/JCXZTakuya Yoshikawa1-11/+24
LOOP/LOOPcc : E0-E2 JCXZ/JECXZ/JRCXZ : E3 Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Clean up INT n/INTO/INT 3(CC/CD/CE)Takuya Yoshikawa1-10/+5
Call emulate_int() directly to avoid spaghetti goto's. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Use opcode::execute for MOV(8C/8E)Takuya Yoshikawa1-28/+31
Different functions for those which take segment register operands. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Use opcode::execute for RET(C3)Takuya Yoshikawa1-7/+11
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Use opcode::execute for XCHG(86/87)Takuya Yoshikawa1-14/+17
In addition, replace one "goto xchg" with an em_xchg() call. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Use opcode::execute for TEST(84/85, A8/A9)Takuya Yoshikawa1-8/+11
Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Use opcode::execute for some instructionsTakuya Yoshikawa1-29/+8
Move the following functions to the opcode tables: RET (Far return) : CB IRET : CF JMP (Jump far) : EA SYSCALL : 0F 05 CLTS : 0F 06 SYSENTER : 0F 34 SYSEXIT : 0F 35 Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Rename emulate_xxx() to em_xxx()Takuya Yoshikawa1-10/+10
The next patch will change these to be called by opcode::execute. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: x86 emulator: Use the pointers ctxt and c consistentlyTakuya Yoshikawa2-33/+32
We should use the local variables ctxt and c when the emulate_ctxt and decode appears many times. At least, we need to be consistent about how we use these in a function. Signed-off-by: Takuya Yoshikawa <yoshikawa.takuya@oss.ntt.co.jp> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
2011-07-12KVM: Document KVM_IOEVENTFDSasha Levin1-0/+30
Document KVM_IOEVENTFD that can be used to receive notifications of PIO/MMIO events without triggering an exit. Signed-off-by: Sasha Levin <levinsasha928@gmail.com> Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>