arm64/hyperv: Add Device Tree Support#139
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Add support for Device Tree (DT) configurations within the arm64 Hyper-V environment, enabling boot with DeviceTree, too, rather than with ACPI or SMCCC only. Signed-off-by: Roman Kisel <romank@microsoft.com> Signed-off-by: Hardik Garg <hargar@microsoft.com>
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Pull request overview
This PR adds a Device Tree (DT) based detection path for running under Hyper-V on arm64, so the Hyper-V guest initialization can proceed when booted via DT in addition to existing ACPI and SMCCC-based detection.
Changes:
- Add DT/FDT-related includes and a new
hyperv_detect_via_fdt()helper. - Extend
hyperv_init()detection logic to initialize Hyper-V when DT indicatesmicrosoft,hyperv.
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| static bool __init hyperv_detect_via_fdt(void) | ||
| { | ||
| #if IS_ENABLED(CONFIG_OF) | ||
| const unsigned long hyp_node = of_get_flat_dt_subnode_by_name( | ||
| of_get_flat_dt_root(), "hypervisor"); | ||
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| return (hyp_node != -FDT_ERR_NOTFOUND) && | ||
| of_flat_dt_is_compatible(hyp_node, "microsoft,hyperv"); | ||
| #else | ||
| return false; | ||
| #endif | ||
| } |
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| #include <linux/libfdt.h> | ||
| #include <linux/of.h> | ||
| #include <linux/of_fdt.h> |
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Add support for Device Tree (DT) configurations within the
arm64 Hyper-V environment, enabling boot with DeviceTree, too,
rather than with ACPI or SMCCC only.
Signed-off-by: Hardik Garg hargar@microsoft.com