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The TDX spec names all TDCALLs with prefix "TDG". Currently, the kernel doesn't follow such convention for the macros of those TDCALLs but uses prefix "TDX_" for all of them. Although it's arguable whether the TDX spec names those TDCALLs properly, it's better for the kernel to follow the spec when naming those macros. Change all macros of TDCALLs to make them consistent with the spec. As a bonus, they get distinguished easily from the host-side SEAMCALLs, which all have prefix "TDH". No functional change intended. Signed-off-by: Kai Huang <kai.huang@intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/all/516dccd0bd8fb9a0b6af30d25bb2d971aa03d598.1692096753.git.kai.huang%40intel.com
111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_SHARED_TDX_H
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#define _ASM_X86_SHARED_TDX_H
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#include <linux/bits.h>
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#include <linux/types.h>
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#define TDX_HYPERCALL_STANDARD 0
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#define TDX_CPUID_LEAF_ID 0x21
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#define TDX_IDENT "IntelTDX "
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/* TDX module Call Leaf IDs */
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#define TDG_VP_INFO 1
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#define TDG_VP_VEINFO_GET 3
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#define TDG_MR_REPORT 4
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#define TDG_MEM_PAGE_ACCEPT 6
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#define TDG_VM_WR 8
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/* TDCS fields. To be used by TDG.VM.WR and TDG.VM.RD module calls */
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#define TDCS_NOTIFY_ENABLES 0x9100000000000010
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/* TDX hypercall Leaf IDs */
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#define TDVMCALL_MAP_GPA 0x10001
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#define TDVMCALL_REPORT_FATAL_ERROR 0x10003
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#define TDVMCALL_STATUS_RETRY 1
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#ifndef __ASSEMBLY__
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/*
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* Used in __tdx_hypercall() to pass down and get back registers' values of
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* the TDCALL instruction when requesting services from the VMM.
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*
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* This is a software only structure and not part of the TDX module/VMM ABI.
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*/
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struct tdx_hypercall_args {
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u64 r8;
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u64 r9;
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u64 r10;
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u64 r11;
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u64 r12;
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u64 r13;
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u64 r14;
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u64 r15;
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u64 rdi;
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u64 rsi;
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u64 rbx;
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u64 rdx;
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};
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/* Used to request services from the VMM */
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u64 __tdx_hypercall(struct tdx_hypercall_args *args);
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u64 __tdx_hypercall_ret(struct tdx_hypercall_args *args);
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/*
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* Wrapper for standard use of __tdx_hypercall with no output aside from
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* return code.
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*/
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static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15)
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{
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struct tdx_hypercall_args args = {
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.r10 = TDX_HYPERCALL_STANDARD,
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.r11 = fn,
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.r12 = r12,
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.r13 = r13,
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.r14 = r14,
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.r15 = r15,
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};
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return __tdx_hypercall(&args);
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}
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/* Called from __tdx_hypercall() for unrecoverable failure */
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void __tdx_hypercall_failed(void);
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/*
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* Used in __tdx_module_call() to gather the output registers' values of the
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* TDCALL instruction when requesting services from the TDX module. This is a
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* software only structure and not part of the TDX module/VMM ABI
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*/
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struct tdx_module_output {
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u64 rcx;
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u64 rdx;
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u64 r8;
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u64 r9;
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u64 r10;
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u64 r11;
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};
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/* Used to communicate with the TDX module */
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u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9,
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struct tdx_module_output *out);
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bool tdx_accept_memory(phys_addr_t start, phys_addr_t end);
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/*
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* The TDG.VP.VMCALL-Instruction-execution sub-functions are defined
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* independently from but are currently matched 1:1 with VMX EXIT_REASONs.
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* Reusing the KVM EXIT_REASON macros makes it easier to connect the host and
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* guest sides of these calls.
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*/
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static __always_inline u64 hcall_func(u64 exit_reason)
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{
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return exit_reason;
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}
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_X86_SHARED_TDX_H */
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