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| author | Nuno Das Neves <nunodasneves@linux.microsoft.com> | 2025-02-07 11:03:21 -0800 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2025-02-13 23:38:47 +0000 |
| commit | e96204e5e96ea3cacb5686e06ed29977c023254f (patch) | |
| tree | d55e3a3c6fd43e119cc33bb76302219bf61d2212 /drivers/hv | |
| parent | a64dcfb451e254085a7daee5fe51bf22959d52d3 (diff) | |
| download | linux-next-e96204e5e96ea3cacb5686e06ed29977c023254f.tar.gz linux-next-e96204e5e96ea3cacb5686e06ed29977c023254f.zip | |
hyperv: Move hv_current_partition_id to arch-generic code
Move hv_current_partition_id and hv_get_partition_id() to hv_common.c,
and call hv_get_partition_id() on arm64 in hyperv_init(). These aren't
specific to x86_64 and will be needed by common code.
Set hv_current_partition_id to HV_PARTITION_ID_SELF by default.
Rename struct hv_get_partition_id to hv_output_get_partition_id, to
make it distinct from the function hv_get_partition_id(), and match
the original Hyper-V struct name.
Remove the BUG()s. Failing to get the id need not crash the machine.
Signed-off-by: Nuno Das Neves <nunodasneves@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Link: https://lore.kernel.org/r/1738955002-20821-2-git-send-email-nunodasneves@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <1738955002-20821-2-git-send-email-nunodasneves@linux.microsoft.com>
Diffstat (limited to 'drivers/hv')
| -rw-r--r-- | drivers/hv/hv_common.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c index f2e6f55d6ca6..ee3083937b4f 100644 --- a/drivers/hv/hv_common.c +++ b/drivers/hv/hv_common.c @@ -31,6 +31,9 @@ #include <hyperv/hvhdk.h> #include <asm/mshyperv.h> +u64 hv_current_partition_id = HV_PARTITION_ID_SELF; +EXPORT_SYMBOL_GPL(hv_current_partition_id); + /* * hv_root_partition, ms_hyperv and hv_nested are defined here with other * Hyper-V specific globals so they are shared across all architectures and are @@ -283,6 +286,25 @@ static inline bool hv_output_page_exists(void) return hv_root_partition || IS_ENABLED(CONFIG_HYPERV_VTL_MODE); } +void __init hv_get_partition_id(void) +{ + struct hv_output_get_partition_id *output; + unsigned long flags; + u64 status, pt_id; + + local_irq_save(flags); + output = *this_cpu_ptr(hyperv_pcpu_input_arg); + status = hv_do_hypercall(HVCALL_GET_PARTITION_ID, NULL, &output); + pt_id = output->partition_id; + local_irq_restore(flags); + + if (hv_result_success(status)) + hv_current_partition_id = pt_id; + else + pr_err("Hyper-V: failed to get partition ID: %#x\n", + hv_result(status)); +} + int __init hv_common_init(void) { int i; |