linux-kernel - [PATCH v2 1/4] x86/mm: Export force_dma

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Message-Id: <20190903131504.18935-2-thomas_os@shipmail.org>
Date:   Tue,  3 Sep 2019 15:15:01 +0200
From:   Thomas Hellström (VMware) 
        <thomas_os@...pmail.org>
To:     dri-devel@...ts.freedesktop.org, pv-drivers@...are.com,
        linux-graphics-maintainer@...are.com, linux-kernel@...r.kernel.org
Cc:     Thomas Hellstrom <thellstrom@...are.com>,
        Dave Hansen <dave.hansen@...ux.intel.com>,
        Andy Lutomirski <luto@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        "H. Peter Anvin" <hpa@...or.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        Tom Lendacky <thomas.lendacky@....com>,
        Christian König <christian.koenig@....com>
Subject: [PATCH v2 1/4] x86/mm: Export force_dma_unencrypted

From: Thomas Hellstrom <thellstrom@...are.com>

The force_dma_unencrypted symbol is needed by TTM to set up the correct
page protection when memory encryption is active. Export it.

Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Ingo Molnar <mingo@...hat.com>
Cc: Borislav Petkov <bp@...en8.de>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: Christian Borntraeger <borntraeger@...ibm.com>
Cc: Tom Lendacky <thomas.lendacky@....com>
Cc: Christian König <christian.koenig@....com>
Signed-off-by: Thomas Hellstrom <thellstrom@...are.com>
---
 arch/x86/mm/mem_encrypt.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c
index fece30ca8b0c..bbfe8802d63a 100644
--- a/arch/x86/mm/mem_encrypt.c
+++ b/arch/x86/mm/mem_encrypt.c
@@ -377,6 +377,7 @@ bool force_dma_unencrypted(struct device *dev)
 
 	return false;
 }
+EXPORT_SYMBOL(force_dma_unencrypted);
 
 /* Architecture __weak replacement functions */
 void __init mem_encrypt_free_decrypted_mem(void)
-- 
2.20.1