linux-kernel - Re: [PATCH] x86/tdx: Explicitly include <linux/errno.h> in <asm/tdx.h>

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Date:   Tue, 6 Jun 2023 22:50:27 +0000
From:   "Huang, Kai" <kai.huang@...el.com>
To:     "kirill@...temov.name" <kirill@...temov.name>
CC:     "sathyanarayanan.kuppuswamy@...ux.intel.com" 
        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        "kirill.shutemov@...ux.intel.com" <kirill.shutemov@...ux.intel.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "bp@...en8.de" <bp@...en8.de>,
        "dave.hansen@...ux.intel.com" <dave.hansen@...ux.intel.com>,
        "Yamahata, Isaku" <isaku.yamahata@...el.com>
Subject: Re: [PATCH] x86/tdx: Explicitly include <linux/errno.h> in
 <asm/tdx.h>

On Wed, 2023-06-07 at 01:45 +0300, Kirill A. Shutemov wrote:
> On Tue, Jun 06, 2023 at 10:17:53PM +0000, Huang, Kai wrote:
> > On Tue, 2023-06-06 at 06:10 -0700, Sathyanarayanan Kuppuswamy wrote:
> > > 
> > > On 6/5/23 8:40 PM, Kai Huang wrote:
> > > > Currently, in <asm/tdx.h> tdx_kvm_hypercall() simply returns -ENODEV
> > > > when TDX guest isn't enabled in the Kconfig w/o having <linux/errno.h>
> > > 
> > > Maybe you can explicitly say "CONFIG_INTEL_TDX_GUEST is not enabled"
> > 
> > It also can be disabled by !CONFIG_KVM_GUEST.
> 
> Borislav has already fixed it during unaccepted memory patchset
> application. He used <asm/errno.h>, not <linux/errno.h>.
> 
> See [1] and [2].
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=75d090fd167acab4d7eda7e2b65729e877c0fd64
> [2] https://lore.kernel.org/all/20230606161606.GDZH9bxhrGnFkaLl2A@fat_crate.local
> 

Wonderful, then we can drop this one :)