kernel/linux.git/include/asm-generic/hyperv-tlfs.h, branch v6.1.174

clocksource/drivers/hyperv: add data structure for reference TSC MSR

2022-11-03T15:50:28+00:00

Add a data structure to represent the reference TSC MSR similar to other MSRs. This simplifies the code for updating the MSR. Signed-off-by: Anirudh Rayabharam Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/20221027095729.1676394-2-anrayabh@linux.microsoft.com Signed-off-by: Wei Liu

KVM: x86: Add checks for reserved-to-zero Hyper-V hypercall fields

2022-02-10T18:50:36+00:00

Add checks for the three fields in Hyper-V's hypercall params that must be zero. Per the TLFS, HV_STATUS_INVALID_HYPERCALL_INPUT is returned if "A reserved bit in the specified hypercall input value is non-zero." Note, some versions of the TLFS have an off-by-one bug for the last reserved field, and define it as being bits 64:60. See https://github.com/MicrosoftDocs/Virtualization-Documentation/pull/1682. Signed-off-by: Sean Christopherson Reviewed-by: Vitaly Kuznetsov Message-Id: <20211207220926.718794-9-seanjc@google.com> Signed-off-by: Paolo Bonzini

KVM: x86: Get the number of Hyper-V sparse banks from the VARHEAD field

2022-02-10T18:50:33+00:00

Get the number of sparse banks from the VARHEAD field, which the guest is required to provide as "The size of a variable header, in QWORDS.", where the variable header is: Variable Header Bytes = {Total Header Bytes - sizeof(Fixed Header)} rounded up to nearest multiple of 8 Variable HeaderSize = Variable Header Bytes / 8 In other words, the VARHEAD should match the number of sparse banks. Keep the manual count as a sanity check, but otherwise rely on the field so as to more closely align with the logic defined in the TLFS and to allow for future cleanups. Tweak the tracepoint output to use "rep_cnt" instead of simply "cnt" now that there is also "var_cnt". Signed-off-by: Sean Christopherson Reviewed-by: Vitaly Kuznetsov Message-Id: <20211207220926.718794-3-seanjc@google.com> Signed-off-by: Paolo Bonzini

PCI: hv: Make the code arch neutral by adding arch specific interfaces

2022-01-12T14:21:54+00:00

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 Signed-off-by: Lorenzo Pieralisi Signed-off-by: Bjorn Helgaas Reviewed-by: Boqun Feng Reviewed-by: Marc Zyngier Reviewed-by: Michael Kelley

x86/hyperv: Add new hvcall guest address host visibility support

2021-10-28T11:21:33+00:00

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 Reviewed-by: Michael Kelley Signed-off-by: Tianyu Lan Link: https://lore.kernel.org/r/20211025122116.264793-4-ltykernel@gmail.com [ wei: fix conflicts with tip ] Signed-off-by: Wei Liu

asm-generic/hyperv: add HV_STATUS_ACCESS_DENIED definition

2021-06-17T17:09:38+00:00

From TLFSv6.0b, this status means: "The caller did not possess sufficient access rights to perform the requested operation." Signed-off-by: Vitaly Kuznetsov Acked-by: Wei Liu Signed-off-by: Paolo Bonzini Message-Id: <20210521095204.2161214-2-vkuznets@redhat.com> Signed-off-by: Paolo Bonzini

x86/Hyper-V: Support for free page reporting

2021-03-24T11:35:24+00:00

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 Tested-by: Matheus Castello Reviewed-by: Michael Kelley Tested-by: Nathan Chancellor Link: https://lore.kernel.org/r/SN4PR2101MB0880121FA4E2FEC67F35C1DCC0649@SN4PR2101MB0880.namprd21.prod.outlook.com Signed-off-by: Wei Liu

x86/hyper-v: Move hv_message_type to architecture neutral module

2021-03-08T17:32:59+00:00

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 Reviewed-by: Boqun Feng Link: https://lore.kernel.org/r/1614721102-2241-3-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu

asm-generic/hyperv: import data structures for mapping device interrupts

2021-02-11T08:47:06+00:00

Signed-off-by: Sunil Muthuswamy Co-Developed-by: Sunil Muthuswamy Signed-off-by: Wei Liu Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/20210203150435.27941-15-wei.liu@kernel.org

asm-generic/hyperv: introduce hv_device_id and auxiliary structures

2021-02-11T08:47:06+00:00

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 Co-Developed-by: Sunil Muthuswamy Signed-off-by: Wei Liu Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/20210203150435.27941-14-wei.liu@kernel.org