[PATCH 05/25] KVM: TDX: Add helper functions to print TDX SEAMCALL error

[Rick Edgecombe]

From: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>

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

Signed-off-by: Isaku Yamahata <isaku.yamahata@xxxxxxxxx>
Signed-off-by: Rick Edgecombe <rick.p.edgecombe@xxxxxxxxx>
Reviewed-by: Binbin Wu <binbin.wu@xxxxxxxxxxxxxxx>
Reviewed-by: Yuan Yao <yuan.yao@xxxxxxxxx>
---
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_ops.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/arch/x86/kvm/vmx/tdx_ops.h b/arch/x86/kvm/vmx/tdx_ops.h
index a9b9ad15f6a8..3f64c871a3f2 100644
--- a/arch/x86/kvm/vmx/tdx_ops.h
+++ b/arch/x86/kvm/vmx/tdx_ops.h
@@ -16,6 +16,21 @@
 
 #include "x86.h"
 
+#define pr_tdx_error(__fn, __err)	\
+	pr_err_ratelimited("SEAMCALL %s failed: 0x%llx\n", #__fn, __err)
+
+#define pr_tdx_error_N(__fn, __err, __fmt, ...)		\
+	pr_err_ratelimited("SEAMCALL %s failed: 0x%llx, " __fmt, #__fn, __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)
+
 static inline u64 tdh_mng_addcx(struct kvm_tdx *kvm_tdx, hpa_t addr)
 {
 	struct tdx_module_args in = {
-- 
2.34.1