1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
// SPDX-License-Identifier: GPL-2.0
/* Copyright (C) 2021-2022 Intel Corporation */
#undef pr_fmt
#define pr_fmt(fmt) "tdx: " fmt
#include <linux/cpufeature.h>
#include <asm/tdx.h>
/*
* Wrapper for standard use of __tdx_hypercall with no output aside from
* return code.
*/
static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15)
{
struct tdx_hypercall_args args = {
.r10 = TDX_HYPERCALL_STANDARD,
.r11 = fn,
.r12 = r12,
.r13 = r13,
.r14 = r14,
.r15 = r15,
};
return __tdx_hypercall(&args, 0);
}
/* Called from __tdx_hypercall() for unrecoverable failure */
void __tdx_hypercall_failed(void)
{
panic("TDVMCALL failed. TDX module bug?");
}
void __init tdx_early_init(void)
{
u32 eax, sig[3];
cpuid_count(TDX_CPUID_LEAF_ID, 0, &eax, &sig[0], &sig[2], &sig[1]);
if (memcmp(TDX_IDENT, sig, sizeof(sig)))
return;
setup_force_cpu_cap(X86_FEATURE_TDX_GUEST);
pr_info("Guest detected\n");
}
|
