Re: [PATCH v14 1/3] x86/tdx: Make __tdx_module_call() usable in driver module

[Sathyanarayanan Kuppuswamy]

On 10/12/22 7:27 AM, Borislav Petkov wrote:
> On Wed, Oct 12, 2022 at 06:35:56AM -0700, Sathyanarayanan Kuppuswamy wrote:
>> So we should create a new wrapper for this use case or use
> 
> Yes, you got it - a new wrapper pls.

Ok. I will add a new wrapper to get the TDREPORT. 

+/*

+ * Add a wrapper for TDG.MR.REPORT TDCALL. It is used in TDX guest

+ * driver module to get the TDREPORT.

+ */

+long tdx_mcall_get_report(void *reportdata, void *tdreport, u8 subtype)

+{

+       if (subtype || !reportdata || !tdreport)

+               return -EINVAL;

+

+       /*

+        * Generate TDREPORT using "TDG.MR.REPORT" TDCALL.

+        *

+        * Get the TDREPORT using REPORTDATA as input. Refer to

+        * section 22.3.3 TDG.MR.REPORT leaf in the TDX Module 1.0

+        * specification for detailed information.

+        */

+       return __tdx_module_call(TDX_GET_REPORT, virt_to_phys(tdreport),

+                       virt_to_phys(reportdata), subtype, 0, NULL);

+}

+EXPORT_SYMBOL_GPL(tdx_mcall_get_report);



> 
> Thx.
> 

-- 
Sathyanarayanan Kuppuswamy
Linux Kernel Developer