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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Janosch Frank <frankja@linux.ibm.com>,
        Vasily Gorbik <gor@linux.ibm.com>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.2 085/162] s390/protvirt: avoid memory sharing for diag 308 set/store
Date:   Tue, 27 Aug 2019 09:50:13 +0200
Message-Id: <20190827072741.096335662@linuxfoundation.org>
In-Reply-To: <20190827072738.093683223@linuxfoundation.org>
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[ Upstream commit a287a49e672d9762bb85de117b477bdf3ef20bd5 ]

This reverts commit db9492cef45e ("s390/protvirt: add memory sharing for
diag 308 set/store") which due to ultravisor implementation change is
not needed after all.

Fixes: db9492cef45e ("s390/protvirt: add memory sharing for diag 308 set/store")
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 arch/s390/boot/ipl_parm.c | 2 --
 arch/s390/kernel/ipl.c    | 9 ---------
 2 files changed, 11 deletions(-)

diff --git a/arch/s390/boot/ipl_parm.c b/arch/s390/boot/ipl_parm.c
index 3c49bde8aa5e3..b8aa6a9f937b2 100644
--- a/arch/s390/boot/ipl_parm.c
+++ b/arch/s390/boot/ipl_parm.c
@@ -48,9 +48,7 @@ void store_ipl_parmblock(void)
 {
 	int rc;
 
-	uv_set_shared(__pa(&ipl_block));
 	rc = __diag308(DIAG308_STORE, &ipl_block);
-	uv_remove_shared(__pa(&ipl_block));
 	if (rc == DIAG308_RC_OK &&
 	    ipl_block.hdr.version <= IPL_MAX_SUPPORTED_VERSION)
 		ipl_block_valid = 1;
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index 2c0a515428d61..6837affc19e81 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -31,7 +31,6 @@
 #include <asm/os_info.h>
 #include <asm/sections.h>
 #include <asm/boot_data.h>
-#include <asm/uv.h>
 #include "entry.h"
 
 #define IPL_PARM_BLOCK_VERSION 0
@@ -892,21 +891,15 @@ static void __reipl_run(void *unused)
 {
 	switch (reipl_type) {
 	case IPL_TYPE_CCW:
-		uv_set_shared(__pa(reipl_block_ccw));
 		diag308(DIAG308_SET, reipl_block_ccw);
-		uv_remove_shared(__pa(reipl_block_ccw));
 		diag308(DIAG308_LOAD_CLEAR, NULL);
 		break;
 	case IPL_TYPE_FCP:
-		uv_set_shared(__pa(reipl_block_fcp));
 		diag308(DIAG308_SET, reipl_block_fcp);
-		uv_remove_shared(__pa(reipl_block_fcp));
 		diag308(DIAG308_LOAD_CLEAR, NULL);
 		break;
 	case IPL_TYPE_NSS:
-		uv_set_shared(__pa(reipl_block_nss));
 		diag308(DIAG308_SET, reipl_block_nss);
-		uv_remove_shared(__pa(reipl_block_nss));
 		diag308(DIAG308_LOAD_CLEAR, NULL);
 		break;
 	case IPL_TYPE_UNKNOWN:
@@ -1176,9 +1169,7 @@ static struct kset *dump_kset;
 
 static void diag308_dump(void *dump_block)
 {
-	uv_set_shared(__pa(dump_block));
 	diag308(DIAG308_SET, dump_block);
-	uv_remove_shared(__pa(dump_block));
 	while (1) {
 		if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
 			break;
-- 
2.20.1