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* PCI: hv: Make the code arch neutral by adding arch specific interfacesSunil Muthuswamy2022-01-121-33/+0
| | | | | | | | | | | | | | | | Encapsulate arch dependencies in Hyper-V vPCI through a set of arch-dependent interfaces. Adding these arch specific interfaces will allow for an implementation for other architectures, such as arm64. There are no functional changes expected from this patch. Link: https://lore.kernel.org/r/1641411156-31705-2-git-send-email-sunilmut@linux.microsoft.com Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com> Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@arm.com> Signed-off-by: Bjorn Helgaas <bhelgaas@google.com> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Reviewed-by: Marc Zyngier <maz@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com>
* x86/hyperv: Add new hvcall guest address host visibility supportTianyu Lan2021-10-281-0/+1
| | | | | | | | | | | | | | | Add new hvcall guest address host visibility support to mark memory visible to host. Call it inside set_memory_decrypted /encrypted(). Add HYPERVISOR feature check in the hv_is_isolation_supported() to optimize in non-virtualization environment. Acked-by: Dave Hansen <dave.hansen@intel.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Tianyu Lan <Tianyu.Lan@microsoft.com> Link: https://lore.kernel.org/r/20211025122116.264793-4-ltykernel@gmail.com [ wei: fix conflicts with tip ] Signed-off-by: Wei Liu <wei.liu@kernel.org>
* asm-generic/hyperv: add HV_STATUS_ACCESS_DENIED definitionVitaly Kuznetsov2021-06-171-0/+1
| | | | | | | | | | | From TLFSv6.0b, this status means: "The caller did not possess sufficient access rights to perform the requested operation." Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com> Acked-by: Wei Liu <wei.liu@kernel.org> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com> Message-Id: <20210521095204.2161214-2-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
* x86/Hyper-V: Support for free page reportingSunil Muthuswamy2021-03-241-2/+33
| | | | | | | | | | | | | | | | Linux has support for free page reporting now (36e66c554b5c) for virtualized environment. On Hyper-V when virtually backed VMs are configured, Hyper-V will advertise cold memory discard capability, when supported. This patch adds the support to hook into the free page reporting infrastructure and leverage the Hyper-V cold memory discard hint hypercall to report/free these pages back to the host. Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com> Tested-by: Matheus Castello <matheus@castello.eng.br> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Tested-by: Nathan Chancellor <nathan@kernel.org> Link: https://lore.kernel.org/r/SN4PR2101MB0880121FA4E2FEC67F35C1DCC0649@SN4PR2101MB0880.namprd21.prod.outlook.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
* x86/hyper-v: Move hv_message_type to architecture neutral moduleMichael Kelley2021-03-081-0/+35
| | | | | | | | | | | | | | | | | The definition of enum hv_message_type includes arch neutral and x86/x64-specific values. Ideally there would be a way to put the arch neutral values in an arch neutral module, and the arch specific values in an arch specific module. But C doesn't provide a way to extend enum types. As a compromise, move the entire definition into an arch neutral module, to avoid duplicating the arch neutral values for x86/x64 and for ARM64. No functional change. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Reviewed-by: Boqun Feng <boqun.feng@gmail.com> Link: https://lore.kernel.org/r/1614721102-2241-3-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
* asm-generic/hyperv: import data structures for mapping device interruptsWei Liu2021-02-111-0/+36
| | | | | | | | Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com> Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com> Signed-off-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20210203150435.27941-15-wei.liu@kernel.org
* asm-generic/hyperv: introduce hv_device_id and auxiliary structuresWei Liu2021-02-111-0/+79
| | | | | | | | | | | | | We will need to identify the device we want Microsoft Hypervisor to manipulate. Introduce the data structures for that purpose. They will be used in a later patch. Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com> Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com> Signed-off-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20210203150435.27941-14-wei.liu@kernel.org
* asm-generic/hyperv: update hv_interrupt_entryWei Liu2021-02-111-2/+34
| | | | | | | | | | | | | | | We will soon use the same structure to handle IO-APIC interrupts as well. Introduce an enum to identify the source and a data structure for IO-APIC RTE. While at it, update pci-hyperv.c to use the enum. No functional change. Signed-off-by: Wei Liu <wei.liu@kernel.org> Acked-by: Rob Herring <robh@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20210203150435.27941-13-wei.liu@kernel.org
* asm-generic/hyperv: update hv_msi_entryWei Liu2021-02-111-2/+26
| | | | | | | | | | | | | We will soon need to access fields inside the MSI address and MSI data fields. Introduce hv_msi_address_register and hv_msi_data_register. Fix up one user of hv_msi_entry in mshyperv.h. No functional change expected. Signed-off-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20210203150435.27941-12-wei.liu@kernel.org
* x86/hyperv: provide a bunch of helper functionsWei Liu2021-02-111-0/+67
| | | | | | | | | | | | | | | They are used to deposit pages into Microsoft Hypervisor and bring up logical and virtual processors. Signed-off-by: Lillian Grassin-Drake <ligrassi@microsoft.com> Signed-off-by: Sunil Muthuswamy <sunilmut@microsoft.com> Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Co-Developed-by: Lillian Grassin-Drake <ligrassi@microsoft.com> Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com> Co-Developed-by: Nuno Das Neves <nunodasneves@linux.microsoft.com> Signed-off-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20210203150435.27941-10-wei.liu@kernel.org
* x86/hyperv: extract partition ID from Microsoft Hypervisor if necessaryWei Liu2021-02-111-0/+6
| | | | | | | | | | We will need the partition ID for executing some hypercalls later. Signed-off-by: Lillian Grassin-Drake <ligrassi@microsoft.com> Co-Developed-by: Sunil Muthuswamy <sunilmut@microsoft.com> Signed-off-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20210203150435.27941-7-wei.liu@kernel.org
* asm-generic/hyperv: change HV_CPU_POWER_MANAGEMENT to HV_CPU_MANAGEMENTWei Liu2021-02-111-1/+1
| | | | | | | | | | This makes the name match Hyper-V TLFS. Signed-off-by: Wei Liu <wei.liu@kernel.org> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com> Reviewed-by: Pavel Tatashin <pasha.tatashin@soleen.com> Reviewed-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20210203150435.27941-2-wei.liu@kernel.org
* x86/hyperv: Load/save the Isolation Configuration leafAndrea Parri (Microsoft)2021-02-111-0/+1
| | | | | | | | | | | | | | | | | | | | If bit 22 of Group B Features is set, the guest has access to the Isolation Configuration CPUID leaf. On x86, the first four bits of EAX in this leaf provide the isolation type of the partition; we entail three isolation types: 'SNP' (hardware-based isolation), 'VBS' (software-based isolation), and 'NONE' (no isolation). Signed-off-by: Andrea Parri (Microsoft) <parri.andrea@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: x86@kernel.org Cc: linux-arch@vger.kernel.org Link: https://lore.kernel.org/r/20210201144814.2701-2-parri.andrea@gmail.com Reviewed-by: Michael Kelley <mikelley@microsoft.com> Signed-off-by: Wei Liu <wei.liu@kernel.org>
* Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvmLinus Torvalds2020-06-031-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull kvm updates from Paolo Bonzini: "ARM: - Move the arch-specific code into arch/arm64/kvm - Start the post-32bit cleanup - Cherry-pick a few non-invasive pre-NV patches x86: - Rework of TLB flushing - Rework of event injection, especially with respect to nested virtualization - Nested AMD event injection facelift, building on the rework of generic code and fixing a lot of corner cases - Nested AMD live migration support - Optimization for TSC deadline MSR writes and IPIs - Various cleanups - Asynchronous page fault cleanups (from tglx, common topic branch with tip tree) - Interrupt-based delivery of asynchronous "page ready" events (host side) - Hyper-V MSRs and hypercalls for guest debugging - VMX preemption timer fixes s390: - Cleanups Generic: - switch vCPU thread wakeup from swait to rcuwait The other architectures, and the guest side of the asynchronous page fault work, will come next week" * tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (256 commits) KVM: selftests: fix rdtsc() for vmx_tsc_adjust_test KVM: check userspace_addr for all memslots KVM: selftests: update hyperv_cpuid with SynDBG tests x86/kvm/hyper-v: Add support for synthetic debugger via hypercalls x86/kvm/hyper-v: enable hypercalls regardless of hypercall page x86/kvm/hyper-v: Add support for synthetic debugger interface x86/hyper-v: Add synthetic debugger definitions KVM: selftests: VMX preemption timer migration test KVM: nVMX: Fix VMX preemption timer migration x86/kvm/hyper-v: Explicitly align hcall param for kvm_hyperv_exit KVM: x86/pmu: Support full width counting KVM: x86/pmu: Tweak kvm_pmu_get_msr to pass 'struct msr_data' in KVM: x86: announce KVM_FEATURE_ASYNC_PF_INT KVM: x86: acknowledgment mechanism for async pf page ready notifications KVM: x86: interrupt based APF 'page ready' event delivery KVM: introduce kvm_read_guest_offset_cached() KVM: rename kvm_arch_can_inject_async_page_present() to kvm_arch_can_dequeue_async_page_present() KVM: x86: extend struct kvm_vcpu_pv_apf_data with token info Revert "KVM: async_pf: Fix #DF due to inject "Page not Present" and "Page Ready" exceptions simultaneously" KVM: VMX: Replace zero-length array with flexible-array ...
* asm-generic/hyperv: Add definitions for Get/SetVpRegister hypercallsMichael Kelley2020-05-201-0/+51
| | | | | | | | | Add definitions for GetVpRegister and SetVpRegister hypercalls, which are implemented for both x86 and ARM64. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20200422195737.10223-5-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
* x86/hyperv: Split hyperv-tlfs.h into arch dependent and independent filesMichael Kelley2020-05-201-0/+442
In preparation for adding ARM64 support, split hyperv-tlfs.h into architecture dependent and architecture independent files, similar to what has been done with mshyperv.h. Move architecture independent definitions into include/asm-generic/hyperv-tlfs.h. The split will avoid duplicating significant lines of code in the ARM64 version of hyperv-tlfs.h. The split has no functional impact. Some of the common definitions have "X64" in the symbol name. Change these to remove the "X64" in the architecture independent version of hyperv-tlfs.h, but add aliases with the "X64" in the x86 version so that x86 code will continue to compile. A later patch set will change all the references and allow removal of the aliases. Signed-off-by: Michael Kelley <mikelley@microsoft.com> Link: https://lore.kernel.org/r/20200422195737.10223-4-mikelley@microsoft.com Signed-off-by: Wei Liu <wei.liu@kernel.org>
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