kernel/linux.git/drivers/hv/Kconfig, branch v6.12.80

x86/hyperv: Use per cpu initial stack for vtl context

2024-03-08T23:40:09+00:00

Currently, the secondary CPUs in Hyper-V VTL context lack support for parallel startup. Therefore, relying on the single initial_stack fetched from the current task structure suffices for all vCPUs. However, common initial_stack risks stack corruption when parallel startup is enabled. In order to facilitate parallel startup, use the initial_stack from the per CPU idle thread instead of the current task. Fixes: 3be1bc2fe9d2 ("x86/hyperv: VTL support for Hyper-V") Signed-off-by: Saurabh Sengar Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/1709452896-13342-1-git-send-email-ssengar@linux.microsoft.com Signed-off-by: Wei Liu Message-ID: <1709452896-13342-1-git-send-email-ssengar@linux.microsoft.com>

Drivers: hv: Kconfig: Add HYPERV_VTL_MODE

2023-04-18T17:29:52+00:00

Add HYPERV_VTL_MODE Kconfig flag for VTL mode. Signed-off-by: Saurabh Sengar Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/1681192532-15460-5-git-send-email-ssengar@linux.microsoft.com Signed-off-by: Wei Liu

hv_netvsc: Remove second mapping of send and recv buffers

2023-04-17T19:19:04+00:00

With changes to how Hyper-V guest VMs flip memory between private (encrypted) and shared (decrypted), creating a second kernel virtual mapping for shared memory is no longer necessary. Everything needed for the transition to shared is handled by set_memory_decrypted(). As such, remove the code to create and manage the second mapping for the pre-allocated send and recv buffers. This mapping is the last user of hv_map_memory()/hv_unmap_memory(), so delete these functions as well. Finally, hv_map_memory() is the last user of vmap_pfn() in Hyper-V guest code, so remove the Kconfig selection of VMAP_PFN. Signed-off-by: Michael Kelley Reviewed-by: Tianyu Lan Link: https://lore.kernel.org/r/1679838727-87310-11-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu

Driver: VMBus: Add Devicetree support

2023-04-17T19:16:22+00:00

Update the driver to support Devicetree boot as well along with ACPI. At present the Devicetree parsing only provides the mmio region info and is not the exact copy of ACPI parsing. This is sufficient to cater all the current Devicetree usecases for VMBus. Currently Devicetree is supported only for x86 systems. Signed-off-by: Saurabh Sengar Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/1679298460-11855-6-git-send-email-ssengar@linux.microsoft.com Signed-off-by: Wei Liu

hv: utils: add PTP_1588_CLOCK to Kconfig to fix build

2021-11-28T21:22:35+00:00

The hyperv utilities use PTP clock interfaces and should depend a a kconfig symbol such that they will be built as a loadable module or builtin so that linker errors do not happen. Prevents these build errors: ld: drivers/hv/hv_util.o: in function `hv_timesync_deinit': hv_util.c:(.text+0x37d): undefined reference to `ptp_clock_unregister' ld: drivers/hv/hv_util.o: in function `hv_timesync_init': hv_util.c:(.text+0x738): undefined reference to `ptp_clock_register' Fixes: 3716a49a81ba ("hv_utils: implement Hyper-V PTP source") Signed-off-by: Randy Dunlap Reported-by: kernel test robot Cc: Arnd Bergmann Cc: "K. Y. Srinivasan" Cc: Haiyang Zhang Cc: Stephen Hemminger Cc: Wei Liu Cc: Dexuan Cui Cc: linux-hyperv@vger.kernel.org Cc: Greg Kroah-Hartman Reviewed-by: Michael Kelley Link: https://lore.kernel.org/r/20211126023316.25184-1-rdunlap@infradead.org Signed-off-by: Wei Liu

Drivers: hv: vmbus: Initialize VMbus ring buffer for Isolation VM

2021-10-28T11:26:36+00:00

VMbus ring buffer are shared with host and it's need to be accessed via extra address space of Isolation VM with AMD SNP support. This patch is to map the ring buffer address in extra address space via vmap_pfn(). Hyperv set memory host visibility hvcall smears data in the ring buffer and so reset the ring buffer memory to zero after mapping. Reviewed-by: Michael Kelley Signed-off-by: Tianyu Lan Link: https://lore.kernel.org/r/20211025122116.264793-10-ltykernel@gmail.com Signed-off-by: Wei Liu

Drivers: hv: Enable Hyper-V code to be built on ARM64

2021-08-04T16:55:21+00:00

Update drivers/hv/Kconfig so CONFIG_HYPERV can be selected on ARM64, causing the Hyper-V specific code to be built. Exclude the Hyper-V enlightened clocks/timers code from being built for ARM64. Signed-off-by: Michael Kelley Reviewed-by: Boqun Feng Acked-by: Marc Zyngier Acked-by: Mark Rutland Acked-by: Catalin Marinas Link: https://lore.kernel.org/r/1628092359-61351-6-git-send-email-mikelley@microsoft.com Signed-off-by: Wei Liu

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

clocksource/drivers/hyperv: Enable TSC page clocksource on 32bit

2019-08-23T14:59:54+00:00

There is no particular reason to not enable TSC page clocksource on 32-bit. mul_u64_u64_shr() is available and despite the increased computational complexity (compared to 64bit) TSC page is still a huge win compared to MSR-based clocksource. In-kernel reads: MSR based clocksource: 3361 cycles TSC page clocksource: 49 cycles Reads from userspace (utilizing vDSO in case of TSC page): MSR based clocksource: 5664 cycles TSC page clocksource: 131 cycles Enabling TSC page on 32bits allows to get rid of CONFIG_HYPERV_TSCPAGE as it is now not any different from CONFIG_HYPERV_TIMER. Signed-off-by: Vitaly Kuznetsov Signed-off-by: Thomas Gleixner Reviewed-by: Michael Kelley Link: https://lkml.kernel.org/r/20190822083630.17059-1-vkuznets@redhat.com

Merge branch 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2019-07-09T00:49:45+00:00

Pull x86 platform updayes from Ingo Molnar: "Most of the commits add ACRN hypervisor guest support, plus two cleanups" * 'x86-platform-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/jailhouse: Mark jailhouse_x2apic_available() as __init x86/platform/geode: Drop includes x86/acrn: Use HYPERVISOR_CALLBACK_VECTOR for ACRN guest upcall vector x86: Add support for Linux guests on an ACRN hypervisor x86/Kconfig: Add new X86_HV_CALLBACK_VECTOR config symbol