| 1 | /* SPDX-License-Identifier: GPL-2.0 */ |
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| 2 | #include <linux/linkage.h> |
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| 3 | #include <asm/frame.h> |
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| 4 | |
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| 5 | #include "tdxcall.S" |
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| 6 | |
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| 7 | /* |
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| 8 | * __seamcall() - Host-side interface functions to SEAM software |
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| 9 | * (the P-SEAMLDR or the TDX module). |
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| 10 | * |
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| 11 | * __seamcall() function ABI: |
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| 12 | * |
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| 13 | * @fn (RDI) - SEAMCALL Leaf number, moved to RAX |
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| 14 | * @args (RSI) - struct tdx_module_args for input |
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| 15 | * |
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| 16 | * Only RCX/RDX/R8-R11 are used as input registers. |
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| 17 | * |
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| 18 | * Return (via RAX) TDX_SEAMCALL_VMFAILINVALID if the SEAMCALL itself |
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| 19 | * fails, or the completion status of the SEAMCALL leaf function. |
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| 20 | */ |
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| 21 | SYM_FUNC_START(__seamcall) |
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| 22 | TDX_MODULE_CALL host=1 |
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| 23 | SYM_FUNC_END(__seamcall) |
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| 24 | |
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| 25 | /* |
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| 26 | * __seamcall_ret() - Host-side interface functions to SEAM software |
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| 27 | * (the P-SEAMLDR or the TDX module), with saving output registers to |
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| 28 | * the 'struct tdx_module_args' used as input. |
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| 29 | * |
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| 30 | * __seamcall_ret() function ABI: |
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| 31 | * |
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| 32 | * @fn (RDI) - SEAMCALL Leaf number, moved to RAX |
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| 33 | * @args (RSI) - struct tdx_module_args for input and output |
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| 34 | * |
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| 35 | * Only RCX/RDX/R8-R11 are used as input/output registers. |
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| 36 | * |
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| 37 | * Return (via RAX) TDX_SEAMCALL_VMFAILINVALID if the SEAMCALL itself |
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| 38 | * fails, or the completion status of the SEAMCALL leaf function. |
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| 39 | */ |
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| 40 | SYM_FUNC_START(__seamcall_ret) |
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| 41 | TDX_MODULE_CALL host=1 ret=1 |
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| 42 | SYM_FUNC_END(__seamcall_ret) |
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| 43 | |
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| 44 | /* KVM requires non-instrumentable __seamcall_saved_ret() for TDH.VP.ENTER */ |
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| 45 | .section .noinstr.text, "ax" |
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| 46 | |
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| 47 | /* |
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| 48 | * __seamcall_saved_ret() - Host-side interface functions to SEAM software |
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| 49 | * (the P-SEAMLDR or the TDX module), with saving output registers to the |
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| 50 | * 'struct tdx_module_args' used as input. |
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| 51 | * |
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| 52 | * __seamcall_saved_ret() function ABI: |
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| 53 | * |
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| 54 | * @fn (RDI) - SEAMCALL Leaf number, moved to RAX |
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| 55 | * @args (RSI) - struct tdx_module_args for input and output |
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| 56 | * |
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| 57 | * All registers in @args are used as input/output registers. |
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| 58 | * |
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| 59 | * Return (via RAX) TDX_SEAMCALL_VMFAILINVALID if the SEAMCALL itself |
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| 60 | * fails, or the completion status of the SEAMCALL leaf function. |
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| 61 | */ |
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| 62 | SYM_FUNC_START(__seamcall_saved_ret) |
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| 63 | TDX_MODULE_CALL host=1 ret=1 saved=1 |
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| 64 | SYM_FUNC_END(__seamcall_saved_ret) |
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| 65 | |
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