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| author | Roman Kisel <romank@linux.microsoft.com> | 2025-04-29 00:07:35 +0300 |
|---|---|---|
| committer | Wei Liu <wei.liu@kernel.org> | 2025-05-23 19:30:55 +0300 |
| commit | e7e6902fbd19b25630cf6a258c44cb385f16b1c8 (patch) | |
| tree | 11b0391b5662b648dc3e1802f1b07e1af3f963cd /arch/x86/hyperv/hv_init.c | |
| parent | f41ceff1748612b9e1538becc13dc2f1617d9d14 (diff) | |
| download | linux-e7e6902fbd19b25630cf6a258c44cb385f16b1c8.tar.xz | |
Drivers: hv: Provide arch-neutral implementation of get_vtl()
To run in the VTL mode, Hyper-V drivers have to know what
VTL the system boots in, and the arm64/hyperv code does not
have the means to compute that.
Refactor the code to hoist the function that detects VTL,
make it arch-neutral to be able to employ it to get the VTL
on arm64.
Signed-off-by: Roman Kisel <romank@linux.microsoft.com>
Reviewed-by: Michael Kelley <mhklinux@outlook.com>
Reviewed-by: Tianyu Lan <tiala@microsoft.com>
Link: https://lore.kernel.org/r/20250428210742.435282-5-romank@linux.microsoft.com
Signed-off-by: Wei Liu <wei.liu@kernel.org>
Message-ID: <20250428210742.435282-5-romank@linux.microsoft.com>
Diffstat (limited to 'arch/x86/hyperv/hv_init.c')
| -rw-r--r-- | arch/x86/hyperv/hv_init.c | 34 |
1 files changed, 0 insertions, 34 deletions
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index ddeb40930bc8..3b569291dfed 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -390,40 +390,6 @@ static void __init hv_stimer_setup_percpu_clockev(void) old_setup_percpu_clockev(); } -#if IS_ENABLED(CONFIG_HYPERV_VTL_MODE) -static u8 __init get_vtl(void) -{ - u64 control = HV_HYPERCALL_REP_COMP_1 | HVCALL_GET_VP_REGISTERS; - struct hv_input_get_vp_registers *input; - struct hv_output_get_vp_registers *output; - unsigned long flags; - u64 ret; - - local_irq_save(flags); - input = *this_cpu_ptr(hyperv_pcpu_input_arg); - output = *this_cpu_ptr(hyperv_pcpu_output_arg); - - memset(input, 0, struct_size(input, names, 1)); - input->partition_id = HV_PARTITION_ID_SELF; - input->vp_index = HV_VP_INDEX_SELF; - input->input_vtl.as_uint8 = 0; - input->names[0] = HV_REGISTER_VSM_VP_STATUS; - - ret = hv_do_hypercall(control, input, output); - if (hv_result_success(ret)) { - ret = output->values[0].reg8 & HV_X64_VTL_MASK; - } else { - pr_err("Failed to get VTL(error: %lld) exiting...\n", ret); - BUG(); - } - - local_irq_restore(flags); - return ret; -} -#else -static inline u8 get_vtl(void) { return 0; } -#endif - /* * This function is to be invoked early in the boot sequence after the * hypervisor has been detected. |