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To:     "Kuppuswamy, Sathyanarayanan" 
        <sathyanarayanan.kuppuswamy@linux.intel.com>,
        Borislav Petkov <bp@alien8.de>
Cc:     Thomas Gleixner <tglx@linutronix.de>,
        Ingo Molnar <mingo@redhat.com>,
        Peter Zijlstra <peterz@infradead.org>,
        Andy Lutomirski <luto@kernel.org>,
        Peter H Anvin <hpa@zytor.com>,
        Dave Hansen <dave.hansen@intel.com>,
        Tony Luck <tony.luck@intel.com>,
        Dan Williams <dan.j.williams@intel.com>,
        Andi Kleen <ak@linux.intel.com>,
        Kirill Shutemov <kirill.shutemov@linux.intel.com>,
        Sean Christopherson <seanjc@google.com>,
        Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
        x86@kernel.org, linux-kernel@vger.kernel.org,
        Deep Shah <sdeep@vmware.com>,
        "VMware, Inc." <pv-drivers@vmware.com>
References: <20210804181329.2899708-1-sathyanarayanan.kuppuswamy@linux.intel.com>
 <20210804181329.2899708-2-sathyanarayanan.kuppuswamy@linux.intel.com>
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 <ddb9c140-caf9-ef46-d5af-ac9a1283c5df@linux.intel.com>
From:   Juergen Gross <jgross@suse.com>
Subject: Re: [PATCH v5 01/12] x86/paravirt: Move halt paravirt calls under
 CONFIG_PARAVIRT
Message-ID: <d700658f-8466-46c5-5fff-9e65a6a24720@suse.com>
Date:   Tue, 17 Aug 2021 15:47:25 +0200
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From: Juergen Gross <jgross@suse.com>
To: "Kuppuswamy, Sathyanarayanan"
 <sathyanarayanan.kuppuswamy@linux.intel.com>, Borislav Petkov <bp@alien8.de>
Cc: Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
 Peter Zijlstra <peterz@infradead.org>, Andy Lutomirski <luto@kernel.org>,
 Peter H Anvin <hpa@zytor.com>, Dave Hansen <dave.hansen@intel.com>,
 Tony Luck <tony.luck@intel.com>, Dan Williams <dan.j.williams@intel.com>,
 Andi Kleen <ak@linux.intel.com>,
 Kirill Shutemov <kirill.shutemov@linux.intel.com>,
 Sean Christopherson <seanjc@google.com>,
 Kuppuswamy Sathyanarayanan <knsathya@kernel.org>, x86@kernel.org,
 linux-kernel@vger.kernel.org, Deep Shah <sdeep@vmware.com>,
 "VMware, Inc." <pv-drivers@vmware.com>
Message-ID: <d700658f-8466-46c5-5fff-9e65a6a24720@suse.com>
Subject: Re: [PATCH v5 01/12] x86/paravirt: Move halt paravirt calls under
 CONFIG_PARAVIRT
References: <20210804181329.2899708-1-sathyanarayanan.kuppuswamy@linux.intel.com>
 <20210804181329.2899708-2-sathyanarayanan.kuppuswamy@linux.intel.com>
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 <fd603d12-1897-1f5f-17fa-b5ac643bc334@linux.intel.com>
 <fcc8c2f1-f33f-96fa-8fc7-1e6e2e6a3936@suse.com>
 <ddb9c140-caf9-ef46-d5af-ac9a1283c5df@linux.intel.com>
In-Reply-To: <ddb9c140-caf9-ef46-d5af-ac9a1283c5df@linux.intel.com>

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On 17.08.21 15:39, Kuppuswamy, Sathyanarayanan wrote:
>=20
>=20
> On 8/17/21 6:28 AM, Juergen Gross wrote:
>> I guess you have been lucky and all users of arch_safe_halt() and halt=
()
>> are directly or indirectly including asm/paravirt.h by other means.
>>
>> There might be configs where this is not true, though.
>>
>> In any case I believe you should fix your patch to let asm/irqflags.h
>> include asm/paravirt.h for the CONFIG_PARAVIRT case.
>=20
> Ok. I will include it.
>=20
> #if defined(CONFIG_PARAVIRT) && !defined(CONFIG_PARAVIRT_XXL)
> #include <asm/paravirt.h>
> #endif
>=20

I don't see a reason to have two "#include <asm/paravirt.h>" lines in
one file. Why don't you use:

#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
#else
#ifndef __ASSEMBLY___
=2E..
#endif
#endif

#ifndef CONFIG_PARAVIRT_XXL
=2E..
#endif


Juergen

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