[PATCH 19/20] x86/tdx: Convert MR_REPORT tdcall to use new TDCALL_0() macro

Kirill A. Shutemov
2024-05-17T14:20:07Z

Use newly introduced TDCALL_0() instead of tdcall() to issue
MR_REPORT tdcall.

It cuts code bloat substantially:

Function old new delta
tdx_mcall_get_report0 229 111 -118

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
---
arch/x86/coco/tdx/tdx.c | 16 ++++++----------
1 file changed, 6 insertions(+), 10 deletions(-)

diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c
index 42436a43bb49..45be53d5eeb4 100644
--- a/arch/x86/coco/tdx/tdx.c
+++ b/arch/x86/coco/tdx/tdx.c
@@ -101,19 +101,15 @@ static inline u64 tdg_vm_wr(u64 field, u64 value, u64 mask)
*/
int tdx_mcall_get_report0(u8 *reportdata, u8 *tdreport)
{
- struct tdx_module_args args = {
- .rcx = virt_to_phys(tdreport),
- .rdx = virt_to_phys(reportdata),
- .r8 = TDREPORT_SUBTYPE_0,
- };
u64 ret;

- ret = __tdcall(TDG_MR_REPORT, &args);
- if (ret) {
- if (TDCALL_RETURN_CODE(ret) == TDCALL_INVALID_OPERAND)
- return -EINVAL;
+ ret = TDCALL_0(TDG_MR_REPORT, virt_to_phys(tdreport),
+ virt_to_phys(reportdata), TDREPORT_SUBTYPE_0, 0);
+
+ if (TDCALL_RETURN_CODE(ret) == TDCALL_INVALID_OPERAND)
+ return -EINVAL;
+ else if (ret)
return -EIO;
- }

return 0;
}
--
2.43.0