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From:   "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
To:     tglx@linutronix.de, mingo@redhat.com, bp@alien8.de,
        dave.hansen@intel.com, luto@kernel.org, peterz@infradead.org
Cc:     sathyanarayanan.kuppuswamy@linux.intel.com, aarcange@redhat.com,
        ak@linux.intel.com, dan.j.williams@intel.com, david@redhat.com,
        hpa@zytor.com, jmattson@google.com, seanjc@google.com,
        thomas.lendacky@amd.com, brijesh.singh@amd.com, x86@kernel.org,
        linux-kernel@vger.kernel.org,
        "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>,
        "K. Y. Srinivasan" <kys@microsoft.com>,
        Haiyang Zhang <haiyangz@microsoft.com>,
        Stephen Hemminger <sthemmin@microsoft.com>,
        Wei Liu <wei.liu@kernel.org>, Dexuan Cui <decui@microsoft.com>,
        Tianyu Lan <Tianyu.Lan@microsoft.com>
Subject: [PATCH 1/4] x86/hyperv: Add missing ARCH_HAS_CC_PLATFORM dependency
Date:   Tue, 22 Feb 2022 21:57:37 +0300
Message-Id: <20220222185740.26228-2-kirill.shutemov@linux.intel.com>
In-Reply-To: <20220222185740.26228-1-kirill.shutemov@linux.intel.com>
References: <20220222185740.26228-1-kirill.shutemov@linux.intel.com>
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On x86, cc_platform_has(CC_ATTR_GUEST_MEM_ENCRYPT) supposes to return
true for HyperV if isolation is supported. But it only does it if the
kernel is compiled with AMD_MEM_ENCRYPT enabled.

It happens due to missed ARCH_HAS_CC_PLATFORM dependency. Without
ARCH_HAS_CC_PLATFORM enabled, cc_platform_has() always returns false.

Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: Wei Liu <wei.liu@kernel.org>
Cc: Dexuan Cui <decui@microsoft.com>
Cc: Tianyu Lan <Tianyu.Lan@microsoft.com>
---
 drivers/hv/Kconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/hv/Kconfig b/drivers/hv/Kconfig
index 0747a8f1fcee..424d3f0751dc 100644
--- a/drivers/hv/Kconfig
+++ b/drivers/hv/Kconfig
@@ -8,6 +8,7 @@ config HYPERV
 		|| (ARM64 && !CPU_BIG_ENDIAN))
 	select PARAVIRT
 	select X86_HV_CALLBACK_VECTOR if X86
+	select ARCH_HAS_CC_PLATFORM if x86
 	select VMAP_PFN
 	help
 	  Select this option to run Linux as a Hyper-V client operating
-- 
2.34.1