hyperv: Log hypercall status codes as strings

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Introduce hv_status_printk() macros as a convenience to log hypercall
errors, formatting them with the status code (HV_STATUS_*) as a raw hex
value and also as a string, which saves some time while debugging.

Create a table of HV_STATUS_ codes with strings and mapped errnos, and
use it for hv_result_to_string() and hv_result_to_errno().

Use the new hv_status_printk()s in hv_proc.c, hyperv-iommu.c, and
irqdomain.c hypercalls to aid debugging in the root partition.

Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Reviewed-by: Stanislav Kinsburskii <skinsburskii@linux.microsoft.com>
Link: https://lore.kernel.org/r/1741980536-3865-2-git-send-email-nunodasneves@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1741980536-3865-2-git-send-email-nunodasneves@linux.microsoft.com>

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Nuno Das Neves 2025-03-14 12:28:47 -07:00 • committed by Wei Liu

parent e792d843aa

commit 3817854ba8

5 changed files with 118 additions and 44 deletions

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6

arch/x86/hyperv/irqdomain.c

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129

drivers/hv/hv_common.c

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10

drivers/hv/hv_proc.c

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4

drivers/iommu/hyperv-iommu.c

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13

include/asm-generic/mshyperv.h

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