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2010-10-24i2c: Simplify i2c_parent_is_i2c_adapterJean Delvare1-1/+0
Only i2c devices can have their type set to i2c_adapter_type, so testing the bus type is redundant. Signed-off-by: Jean Delvare <[email protected]> Cc: Michael Lawnick <[email protected]>
2010-10-24i2c-pca-platform: Change device name of request_irqNobuhiro Iwamatsu1-1/+1
i2c->adap.name shouldn't be used in request_irq. Instead the driver name "i2c-pca-platform" should be used. Signed-off-by: Nobuhiro Iwamatsu <[email protected]> Acked-by: Wolfram Sang <[email protected]> Cc: [email protected] Signed-off-by: Jean Delvare <[email protected]>
2010-10-24i2c: Fix Kconfig dependenciesJean Delvare2-1/+14
drivers/i2c/algos/Kconfig makes all the algorithms dependent on !I2C_HELPER_AUTO, which triggers a Kconfig warning about broken dependencies when some driver selects one of the algorithms. Ideally we would make only the prompts dependent on !I2C_HELPER_AUTO, however Kconfig doesn't currently support that. So we have to redefine the symbols separately for the I2C_HELPER_AUTO=y case. Signed-off-by: Jean Delvare <[email protected]> Acked-by: Michal Marek <[email protected]>
2010-10-24KVM: Drop CONFIG_DMAR dependency around kvm_iommu_map_pagesJan Kiszka1-2/+0
We also have to call kvm_iommu_map_pages for CONFIG_AMD_IOMMU. So drop the dependency on Intel IOMMU, kvm_iommu_map_pages will be a nop anyway if CONFIG_IOMMU_API is not defined. KVM-Stable-Tag. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: Fix signature of kvm_iommu_map_pages stubJan Kiszka1-2/+1
Breaks otherwise if CONFIG_IOMMU_API is not set. KVM-Stable-Tag. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: MCE: Send SRAR SIGBUS directlyHuang Ying1-8/+10
Originally, SRAR SIGBUS is sent to QEMU-KVM via touching the poisoned page. But commit 96054569190bdec375fe824e48ca1f4e3b53dd36 prevents the signal from being sent. So now the signal is sent via force_sig_info_fault directly. [marcelo: use send_sig_info instead] Reported-by: Dean Nelson <[email protected]> Signed-off-by: Huang Ying <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: MCE: Add MCG_SER_P into KVM_MCE_CAP_SUPPORTEDHuang Ying1-1/+1
Now we have MCG_SER_P (and corresponding SRAO/SRAR MCE) support in kernel and QEMU-KVM, the MCG_SER_P should be added into KVM_MCE_CAP_SUPPORTED to make all these code really works. Reported-by: Dean Nelson <[email protected]> Signed-off-by: Huang Ying <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: fix typo in copyright noticeNicolas Kaiser14-14/+14
Fix typo in copyright notice. Signed-off-by: Nicolas Kaiser <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: Disable interrupts around get_kernel_ns()Avi Kivity1-0/+4
get_kernel_ns() wants preemption disabled. It doesn't make a lot of sense during the get/set ioctls (no way to make them non-racy) but the callee wants it. Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: Avoid sign extension in mmu_alloc_direct_roots() pae root addressAvi Kivity1-1/+1
Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: move access code parsing to FNAME(walk_addr) functionXiao Guangrong1-24/+16
Move access code parsing from caller site to FNAME(walk_addr) function Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: audit: check whether have unsync sps after root syncXiao Guangrong2-3/+19
After root synced, all unsync sps are synced, this patch add a check to make sure it's no unsync sps in VCPU's page table Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: audit: introduce audit_printk to cleanup audit codeXiao Guangrong1-24/+18
Introduce audit_printk, and record audit point instead audit name Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: audit: unregister audit tracepoints before module unloadedXiao Guangrong1-9/+12
fix: Call Trace: [<ffffffffa01e46ba>] ? kvm_mmu_pte_write+0x229/0x911 [kvm] [<ffffffffa01c6ba9>] ? gfn_to_memslot+0x39/0xa0 [kvm] [<ffffffffa01c6c26>] ? mark_page_dirty+0x16/0x2e [kvm] [<ffffffffa01c6d6f>] ? kvm_write_guest_page+0x67/0x7f [kvm] [<ffffffff81066fbd>] ? local_clock+0x2a/0x3b [<ffffffffa01d52ce>] emulator_write_phys+0x46/0x54 [kvm] ...... Code: Bad RIP value. RIP [<ffffffffa0172056>] 0xffffffffa0172056 RSP <ffff880134f69a70> CR2: ffffffffa0172056 Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: audit: fix vcpu's spte walkingXiao Guangrong1-1/+1
After nested nested paging, it may using long mode to shadow 32/PAE paging guest, so this patch fix it Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: set access bit for direct mappingXiao Guangrong1-1/+2
Set access bit while setup up direct page table if it's nonpaing or npt enabled, it's good for CPU's speculate access Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: cleanup for error mask set while walk guest page tableXiao Guangrong1-10/+7
Small cleanup for set page fault error code Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: update 'root_hpa' out of loop in PAE shadow pathXiao Guangrong1-2/+2
The value of 'vcpu->arch.mmu.pae_root' is not modified, so we can update 'root_hpa' out of the loop. Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: x86 emulator: Eliminate compilation warning in x86_decode_insn()Sheng Yang1-1/+1
Eliminate: arch/x86/kvm/emulate.c:801: warning: ‘sv’ may be used uninitialized in this function on gcc 4.1.2 Signed-off-by: Sheng Yang <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: x86: Fix constant type in kvm_get_time_scaleJan Kiszka1-3/+3
Older gcc versions complain about the improper type (for x86-32), 4.5 seems to fix this silently. However, we should better use the right type initially. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: VMX: Add AX to list of registers clobbered by guest switchJan Kiszka1-1/+1
By chance this caused no harm so far. We overwrite AX during switch to/from guest context, so we must declare this. Signed-off-by: Jan Kiszka <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM guest: Move a printk that's using the clock before it's readyArjan Koers1-2/+4
Fix a hang during SMP kernel boot on KVM that showed up after commit 489fb490dbf8dab0249ad82b56688ae3842a79e8 (2.6.35) and 59aab522154a2f17b25335b63c1cf68a51fb6ae0 (2.6.34.1). The problem only occurs when CONFIG_PRINTK_TIME is set. KVM-Stable-Tag. Signed-off-by: Arjan Koers <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: x86: TSC catchup modeZachary Amsden2-21/+72
Negate the effects of AN TYM spell while kvm thread is preempted by tracking conversion factor to the highest TSC rate and catching the TSC up when it has fallen behind the kernel view of time. Note that once triggered, we don't turn off catchup mode. A slightly more clever version of this is possible, which only does catchup when TSC rate drops, and which specifically targets only CPUs with broken TSC, but since these all are considered unstable_tsc(), this patch covers all necessary cases. Signed-off-by: Zachary Amsden <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: x86: Rename timer functionZachary Amsden2-7/+7
This just changes some names to better reflect the usage they will be given. Separated out to keep confusion to a minimum. Signed-off-by: Zachary Amsden <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: x86: Make math work for other scalesZachary Amsden1-12/+18
The math in kvm_get_time_scale relies on the fact that NSEC_PER_SEC < 2^32. To use the same function to compute arbitrary time scales, we must extend the first reduction step to shrink the base rate to a 32-bit value, and possibly reduce the scaled rate into a 32-bit as well. Note we must take care to avoid an arithmetic overflow when scaling up the tps32 value (this could not happen with the fixed scaled value of NSEC_PER_SEC, but can happen with scaled rates above 2^31. Signed-off-by: Zachary Amsden <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: cpu_relax() during spin waiting for rebootAvi Kivity1-1/+1
It doesn't really matter, but if we spin, we should spin in a more relaxed manner. This way, if something goes wrong at least it won't contribute to global warming. Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: VMX: Respect interrupt window in big real modeAvi Kivity1-0/+9
If an interrupt is pending, we need to stop emulation so we can inject it. Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: VMX: Emulated real mode interrupt injectionMohammed Gamal1-59/+6
Replace the inject-as-software-interrupt hack we currently have with emulated injection. Signed-off-by: Mohammed Gamal <[email protected]> Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: Add kvm_inject_realmode_interrupt() wrapperMohammed Gamal2-0/+30
This adds a wrapper function kvm_inject_realmode_interrupt() around the emulator function emulate_int_real() to allow real mode interrupt injection. [avi: initialize operand and address sizes before emulating interrupts] [avi: initialize rip for real mode interrupt injection] [avi: clear interrupt pending flag after emulating interrupt injection] Signed-off-by: Mohammed Gamal <[email protected]> Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: x86 emulator: Expose emulate_int_real()Mohammed Gamal1-1/+2
Signed-off-by: Mohammed Gamal <[email protected]> Signed-off-by: Avi Kivity <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: MMU: fix counting of rmap entries in rmap_add()Hillf Danton1-1/+2
It seems that rmap entries are under counted. Signed-off-by: Hillf Danton <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: document 'kvm.mmu_audit' parameterXiao Guangrong1-0/+4
Document this parameter into Documentation/kernel-parameters.txt Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: fix the description of kvm-amd.nested in documentationXiao Guangrong1-1/+1
The default state of 'kvm-amd.nested' is enabled now, so fix the documentation Signed-off-by: Xiao Guangrong <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: SVM: do not generate "external interrupt exit" if other exit is pendingGleb Natapov1-0/+8
Nested SVM checks for external interrupt after injecting nested exception. In case there is external interrupt pending the code generates "external interrupt exit" and overwrites previous exit info. If previously injected exception already generated exit it will be lost. Signed-off-by: Gleb Natapov <[email protected]> Acked-by: Joerg Roedel <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: Convert PIC lock from raw spinlock to ordinary spinlockAvi Kivity3-8/+8
The PIC code used to be called from preempt_disable() context, which wasn't very good for PREEMPT_RT. That is no longer the case, so move back from raw_spinlock_t to spinlock_t. Signed-off-by: Avi Kivity <[email protected]> Acked-by: Thomas Gleixner <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: x86: Fix kvmclock bugZachary Amsden1-0/+1
If preempted after kvmclock values are updated, but before hardware virtualization is entered, the last tsc time as read by the guest is never set. It underflows the next time kvmclock is updated if there has not yet been a successful entry / exit into hardware virt. Fix this by simply setting last_tsc to the newly read tsc value so that any computed nsec advance of kvmclock is nulled. Signed-off-by: Zachary Amsden <[email protected]> Signed-off-by: Marcelo Tosatti <[email protected]>
2010-10-24KVM: MMU: Don't track nested fault info in error-codeJoerg Roedel3-11/+5
This patch moves the detection whether a page-fault was nested or not out of the error code and moves it into a separate variable in the fault struct. Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: VMX: Move fixup_rmode_irq() to avoid forward declarationAvi Kivity1-24/+23
No code changes. Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: Non-atomic interrupt injectionAvi Kivity4-20/+40
Change the interrupt injection code to work from preemptible, interrupts enabled context. This works by adding a ->cancel_injection() operation that undoes an injection in case we were not able to actually enter the guest (this condition could never happen with atomic injection). Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: VMX: Parameterize vmx_complete_interrupts() for both exit and entryAvi Kivity1-13/+21
Currently vmx_complete_interrupts() can decode event information from vmx exit fields into the generic kvm event queues. Make it able to decode the information from the entry fields as well by parametrizing it. Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: VMX: Move real-mode interrupt injection fixup to vmx_complete_interrupts()Avi Kivity1-3/+6
This allows reuse of vmx_complete_interrupts() for cancelling injections. Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: VMX: Split up vmx_complete_interrupts()Avi Kivity1-12/+27
vmx_complete_interrupts() does too much, split it up: - vmx_vcpu_run() gets the "cache important vmcs fields" part - a new vmx_complete_atomic_exit() gets the parts that must be done atomically - a new vmx_recover_nmi_blocking() does what its name says - vmx_complete_interrupts() retains the event injection recovery code This helps in reducing the work done in atomic context. Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: Check for pending events before attempting injectionAvi Kivity6-12/+58
Instead of blindly attempting to inject an event before each guest entry, check for a possible event first in vcpu->requests. Sites that can trigger event injection are modified to set KVM_REQ_EVENT: - interrupt, nmi window opening - ppr updates - i8259 output changes - local apic irr changes - rflags updates - gif flag set - event set on exit This improves non-injecting entry performance, and sets the stage for non-atomic injection. Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: MMU: Fix regression with ept memory types merged into non-ept page tablesAvi Kivity1-1/+1
Commit "KVM: MMU: Make tdp_enabled a mmu-context parameter" made real-mode set ->direct_map, and changed the code that merges in the memory type depend on direct_map instead of tdp_enabled. However, in this case what really matters is tdp, not direct_map, since tdp changes the pte format regardless of whether the mapping is direct or not. As a result, real-mode shadow mappings got corrupted with ept memory types. The result was a huge slowdown, likely due to the cache being disabled. Change it back as the simplest fix for the regression (real fix is to move all that to vmx code, and not use tdp_enabled as a synonym for ept). Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: Document that KVM_GET_SUPPORTED_CPUID may return emulated valuesAvi Kivity1-2/+3
Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: X86: Report SVM bit to userspace only when supportedJoerg Roedel2-1/+5
This patch fixes a bug in KVM where it _always_ reports the support of the SVM feature to userspace. But KVM only supports SVM on AMD hardware and only when it is enabled in the kernel module. This patch fixes the wrong reporting. Cc: [email protected] Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: SVM: Report Nested Paging support to userspaceJoerg Roedel1-0/+4
This patch implements the reporting of the nested paging feature support to userspace. Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: SVM: Expect two more candiates for exit_int_infoJoerg Roedel1-1/+2
This patch adds INTR and NMI intercepts to the list of expected intercepts with an exit_int_info set. While this can't happen on bare metal it is architectural legal and may happen with KVMs SVM emulation. Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: SVM: Initialize Nested Nested MMU context on VMRUNJoerg Roedel2-9/+42
This patch adds code to initialize the Nested Nested Paging MMU context when the L1 guest executes a VMRUN instruction and has nested paging enabled in its VMCB. Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
2010-10-24KVM: SVM: Implement MMU helper functions for Nested Nested PagingJoerg Roedel1-0/+30
This patch adds the helper functions which will be used in the mmu context for handling nested nested page faults. Signed-off-by: Joerg Roedel <[email protected]> Signed-off-by: Avi Kivity <[email protected]>
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