64 lines
1.8 KiB
ArmAsm
64 lines
1.8 KiB
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0 */
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#include <asm/asm-offsets.h>
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#include <asm/asm.h>
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#include <linux/linkage.h>
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#include <linux/errno.h>
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#include "../../virt/vmx/tdx/tdxcall.S"
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.section .noinstr.text, "ax"
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/*
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* __tdcall() - Used by TDX guests to request services from the TDX
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* module (does not include VMM services) using TDCALL instruction.
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*
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* __tdcall() function ABI:
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*
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* @fn (RDI) - TDCALL Leaf ID, moved to RAX
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* @args (RSI) - struct tdx_module_args for input
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*
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* Only RCX/RDX/R8-R11 are used as input registers.
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*
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* Return status of TDCALL via RAX.
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*/
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SYM_FUNC_START(__tdcall)
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TDX_MODULE_CALL host=0
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SYM_FUNC_END(__tdcall)
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/*
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* __tdcall_ret() - Used by TDX guests to request services from the TDX
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* module (does not include VMM services) using TDCALL instruction, with
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* saving output registers to the 'struct tdx_module_args' used as input.
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*
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* __tdcall_ret() function ABI:
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*
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* @fn (RDI) - TDCALL Leaf ID, moved to RAX
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* @args (RSI) - struct tdx_module_args for input and output
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*
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* Only RCX/RDX/R8-R11 are used as input/output registers.
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*
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* Return status of TDCALL via RAX.
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*/
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SYM_FUNC_START(__tdcall_ret)
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TDX_MODULE_CALL host=0 ret=1
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SYM_FUNC_END(__tdcall_ret)
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/*
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* __tdcall_saved_ret() - Used by TDX guests to request services from the
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* TDX module (including VMM services) using TDCALL instruction, with
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* saving output registers to the 'struct tdx_module_args' used as input.
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*
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* __tdcall_saved_ret() function ABI:
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*
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* @fn (RDI) - TDCALL leaf ID, moved to RAX
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* @args (RSI) - struct tdx_module_args for input/output
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*
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* All registers in @args are used as input/output registers.
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*
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* On successful completion, return the hypercall error code.
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*/
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SYM_FUNC_START(__tdcall_saved_ret)
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TDX_MODULE_CALL host=0 ret=1 saved=1
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SYM_FUNC_END(__tdcall_saved_ret)
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