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x86/tdx: Make _tdx_hypercall() and __tdx_module_call() available in boot stub

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Memory acceptance requires a hypercall and one or multiple module calls.

Make helpers for the calls available in boot stub. It has to accept
memory where kernel image and initrd are placed.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Link: https://lore.kernel.org/r/20230606142637.5171-8-kirill.shutemov@linux.intel.com
This commit is contained in:
Kirill A. Shutemov
2023-06-06 17:26:35 +03:00
committed by Borislav Petkov (AMD)
parent c211c19e80
commit ff40b5769a
3 changed files with 51 additions and 51 deletions
Download Patch File Download Diff File Expand all files Collapse all files

32
arch/x86/coco/tdx/tdx.c
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@@ -14,20 +14,6 @@
#include <asm/insn-eval.h>
#include <asm/pgtable.h>
/* TDX module Call Leaf IDs */
#define TDX_GET_INFO 1
#define TDX_GET_VEINFO 3
#define TDX_GET_REPORT 4
#define TDX_ACCEPT_PAGE 6
#define TDX_WR 8
/* TDCS fields. To be used by TDG.VM.WR and TDG.VM.RD module calls */
#define TDCS_NOTIFY_ENABLES 0x9100000000000010
/* TDX hypercall Leaf IDs */
#define TDVMCALL_MAP_GPA 0x10001
#define TDVMCALL_REPORT_FATAL_ERROR 0x10003
/* MMIO direction */
#define EPT_READ 0
#define EPT_WRITE 1
@@ -51,24 +37,6 @@
#define TDREPORT_SUBTYPE_0 0
/*
* 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);
}
/* Called from __tdx_hypercall() for unrecoverable failure */
noinstr void __tdx_hypercall_failed(void)
{

51
arch/x86/include/asm/shared/tdx.h
View File

@@ -10,6 +10,20 @@
#define TDX_CPUID_LEAF_ID 0x21
#define TDX_IDENT "IntelTDX "
/* TDX module Call Leaf IDs */
#define TDX_GET_INFO 1
#define TDX_GET_VEINFO 3
#define TDX_GET_REPORT 4
#define TDX_ACCEPT_PAGE 6
#define TDX_WR 8
/* TDCS fields. To be used by TDG.VM.WR and TDG.VM.RD module calls */
#define TDCS_NOTIFY_ENABLES 0x9100000000000010
/* TDX hypercall Leaf IDs */
#define TDVMCALL_MAP_GPA 0x10001
#define TDVMCALL_REPORT_FATAL_ERROR 0x10003
#ifndef __ASSEMBLY__
/*
@@ -37,8 +51,45 @@ struct tdx_hypercall_args {
u64 __tdx_hypercall(struct tdx_hypercall_args *args);
u64 __tdx_hypercall_ret(struct tdx_hypercall_args *args);
/*
* 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);
}
/* Called from __tdx_hypercall() for unrecoverable failure */
void __tdx_hypercall_failed(void);
/*
* Used in __tdx_module_call() to gather the output registers' values of the
* TDCALL instruction when requesting services from the TDX module. This is a
* software only structure and not part of the TDX module/VMM ABI
*/
struct tdx_module_output {
u64 rcx;
u64 rdx;
u64 r8;
u64 r9;
u64 r10;
u64 r11;
};
/* Used to communicate with the TDX module */
u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9,
struct tdx_module_output *out);
#endif /* !__ASSEMBLY__ */
#endif /* _ASM_X86_SHARED_TDX_H */

19
arch/x86/include/asm/tdx.h
View File

@@ -20,21 +20,6 @@
#ifndef __ASSEMBLY__
/*
* Used to gather the output registers values of the TDCALL and SEAMCALL
* instructions when requesting services from the TDX module.
*
* This is a software only structure and not part of the TDX module/VMM ABI.
*/
struct tdx_module_output {
u64 rcx;
u64 rdx;
u64 r8;
u64 r9;
u64 r10;
u64 r11;
};
/*
* Used by the #VE exception handler to gather the #VE exception
* info from the TDX module. This is a software only structure
@@ -55,10 +40,6 @@ struct ve_info {
void __init tdx_early_init(void);
/* Used to communicate with the TDX module */
u64 __tdx_module_call(u64 fn, u64 rcx, u64 rdx, u64 r8, u64 r9,
struct tdx_module_output *out);
void tdx_get_ve_info(struct ve_info *ve);
bool tdx_handle_virt_exception(struct pt_regs *regs, struct ve_info *ve);