linux-kernel - [PATCH RFC v9 05/51] x86/coco: move CONFIG_HAS_CC

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Message-ID: <20230612042559.375660-6-michael.roth@amd.com>
Date:   Sun, 11 Jun 2023 23:25:13 -0500
From:   Michael Roth <michael.roth@....com>
To:     <kvm@...r.kernel.org>
CC:     <linux-coco@...ts.linux.dev>, <linux-mm@...ck.org>,
        <linux-crypto@...r.kernel.org>, <x86@...nel.org>,
        <linux-kernel@...r.kernel.org>, <tglx@...utronix.de>,
        <mingo@...hat.com>, <jroedel@...e.de>, <thomas.lendacky@....com>,
        <hpa@...or.com>, <ardb@...nel.org>, <pbonzini@...hat.com>,
        <seanjc@...gle.com>, <vkuznets@...hat.com>, <jmattson@...gle.com>,
        <luto@...nel.org>, <dave.hansen@...ux.intel.com>, <slp@...hat.com>,
        <pgonda@...gle.com>, <peterz@...radead.org>,
        <srinivas.pandruvada@...ux.intel.com>, <rientjes@...gle.com>,
        <dovmurik@...ux.ibm.com>, <tobin@....com>, <bp@...en8.de>,
        <vbabka@...e.cz>, <kirill@...temov.name>, <ak@...ux.intel.com>,
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        <sathyanarayanan.kuppuswamy@...ux.intel.com>,
        <alpergun@...gle.com>, <dgilbert@...hat.com>, <jarkko@...nel.org>,
        <ashish.kalra@....com>, <nikunj.dadhania@....com>,
        <liam.merwick@...cle.com>, <zhi.a.wang@...el.com>,
        "Kirill A . Shutemov" <kirill.shutemov@...ux.intel.com>
Subject: [PATCH RFC v9 05/51] x86/coco: move CONFIG_HAS_CC_PLATFORM check down into coco/Makefile

Currently CONFIG_HAS_CC_PLATFORM is a prereq for building anything in
arch/x86/coco, but that is generally only applicable for guest support.

For SEV-SNP, helpers related purely to host support will also live in
arch/x86/coco. To allow for CoCo-related host support code in
arch/x86/coco, move that check down into the Makefile and check for it
specifically when needed.

Cc: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Suggested-by: Tom Lendacky <thomas.lendacky@....com>
Signed-off-by: Michael Roth <michael.roth@....com>
---
 arch/x86/Kbuild        | 2 +-
 arch/x86/coco/Makefile | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/Kbuild b/arch/x86/Kbuild
index 5a83da703e87..1889cef48b58 100644
--- a/arch/x86/Kbuild
+++ b/arch/x86/Kbuild
@@ -1,5 +1,5 @@
 # SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_ARCH_HAS_CC_PLATFORM) += coco/
+obj-y += coco/
 
 obj-y += entry/
 
diff --git a/arch/x86/coco/Makefile b/arch/x86/coco/Makefile
index c816acf78b6a..6aa52e719bf5 100644
--- a/arch/x86/coco/Makefile
+++ b/arch/x86/coco/Makefile
@@ -3,6 +3,6 @@ CFLAGS_REMOVE_core.o	= -pg
 KASAN_SANITIZE_core.o	:= n
 CFLAGS_core.o		+= -fno-stack-protector
 
-obj-y += core.o
+obj-$(CONFIG_ARCH_HAS_CC_PLATFORM) += core.o
 
 obj-$(CONFIG_INTEL_TDX_GUEST)	+= tdx/
-- 
2.25.1