From: Isaku Yamahata <isaku.yamahata@intel.com>

Add helper functions to print out errors from the TDX module in a uniform
manner.

Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com>
Co-developed-by: Tony Lindgren <tony.lindgren@linux.intel.com>
Signed-off-by: Tony Lindgren <tony.lindgren@linux.intel.com>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@intel.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Yuan Yao <yuan.yao@intel.com>
---
uAPI breakout v2:
 - Stringify the error codes, use ____pr_tdx_error_N() naming (Isaku, Kai)

uAPI breakout v1:
- Update for the wrapper functions for SEAMCALLs. (Sean)
- Reorder header file include to adjust argument change of the C wrapper.
- Fix bisectability issues in headers (Kai)
- Updates from seamcall overhaul (Kai)

v19:
- dropped unnecessary include <asm/tdx.h>

v18:
- Added Reviewed-by Binbin.
---
 arch/x86/kvm/vmx/tdx.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/x86/kvm/vmx/tdx.c b/arch/x86/kvm/vmx/tdx.c
index f2830ff2af1d..60b577379a9a 100644
--- a/arch/x86/kvm/vmx/tdx.c
+++ b/arch/x86/kvm/vmx/tdx.c
@@ -7,6 +7,21 @@
 #undef pr_fmt
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
+#define pr_tdx_error(__fn, __err)	\
+	pr_err_ratelimited("SEAMCALL %s failed: 0x%llx\n", #__fn, __err)
+
+#define __pr_tdx_error_N(__fn_str, __err, __fmt, ...)		\
+	pr_err_ratelimited("SEAMCALL " __fn_str " failed: 0x%llx, " __fmt,  __err,  __VA_ARGS__)
+
+#define pr_tdx_error_1(__fn, __err, __rcx)		\
+	__pr_tdx_error_N(#__fn, __err, "rcx 0x%llx\n", __rcx)
+
+#define pr_tdx_error_2(__fn, __err, __rcx, __rdx)	\
+	__pr_tdx_error_N(#__fn, __err, "rcx 0x%llx, rdx 0x%llx\n", __rcx, __rdx)
+
+#define pr_tdx_error_3(__fn, __err, __rcx, __rdx, __r8)	\
+	__pr_tdx_error_N(#__fn, __err, "rcx 0x%llx, rdx 0x%llx, r8 0x%llx\n", __rcx, __rdx, __r8)
+
 bool enable_tdx __ro_after_init;
 module_param_named(tdx, enable_tdx, bool, 0444);
 
-- 
2.47.0