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After TDX_HCALL_ISSUE_STI got dropped, the only flag left is TDX_HCALL_HAS_OUTPUT. The flag indicates if the caller wants to see tdx_hypercall_args updated based on the hypercall output. Drop the flags and provide __tdx_hypercall_ret() that matches TDX_HCALL_HAS_OUTPUT semantics. Suggested-by: Peter Zijlstra <peterz@infradead.org> Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Link: https://lore.kernel.org/all/20230321003511.9469-1-kirill.shutemov%40linux.intel.com
45 lines
968 B
C
45 lines
968 B
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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#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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/* Called from __tdx_hypercall() for unrecoverable failure */
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void __tdx_hypercall_failed(void);
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#endif /* !__ASSEMBLY__ */
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#endif /* _ASM_X86_SHARED_TDX_H */
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