linux-kernel - RE: [PATCH v3] virt: tdx-guest: Handle GetQuote request error code

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Date: Mon, 26 Feb 2024 17:36:07 -0800
From: Dan Williams <dan.j.williams@...el.com>
To: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>,
	"Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>, <x86@...nel.org>
CC: Dave Hansen <dave.hansen@...ux.intel.com>, Dan Williams
	<dan.j.williams@...el.com>, Xiaoyao Li <xiaoyao.li@...el.com>,
	<linux-kernel@...r.kernel.org>, <linux-coco@...ts.linux.dev>
Subject: RE: [PATCH v3] virt: tdx-guest: Handle GetQuote request error code

Kuppuswamy Sathyanarayanan wrote:
> The tdx-guest driver marshals quote requests via hypercall to have a
> quoting enclave sign attestation evidence about the current state of
> the TD. There are 2 possible failures, a transport failure (failure
> to communicate with the quoting agent) and payload failure (a failed
> quote). The driver only checks the former, update it to consider the
> latter payload errors as well.
> 
> Fixes: f4738f56d1dc ("virt: tdx-guest: Add Quote generation support using TSM_REPORTS")
> Reported-by: Xiaoyao Li <xiaoyao.li@...el.com>
> Closes: https://lore.kernel.org/linux-coco/6bdf569c-684a-4459-af7c-4430691804eb@linux.intel.com/T/#u
> Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@...ux.intel.com>
> Reviewed-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
> Reviewed-by: Xiaoyao Li <xiaoyao.li@...el.com>
> Acked-by: Kai Huang <kai.huang@...el.com>

Looks good to me:

Reviewed-by: Dan Williams <dan.j.williams@...el.com>

..if you decide you need a debug print here, or to differentiate the
error codes based on transport vs payload error that can be a follow-on
change.