X-Git-Url: http://git.monstr.eu/?p=linux-2.6-microblaze.git;a=blobdiff_plain;f=arch%2Fs390%2Fboot%2Fuv.c;h=e6be155ab2e52a4dc82dfd5d702349eb85a7248c;hp=f6b0c4f43c99e78237927fe1b9b4463db880529f;hb=32b47072f319bb65e9afad59e78153d83496f1f5;hpb=894d6f401b21865962aba776ecaa918b2f0abaa6

diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c
index f6b0c4f43c99..e6be155ab2e5 100644
--- a/arch/s390/boot/uv.c
+++ b/arch/s390/boot/uv.c
@@ -1,8 +1,12 @@
 // SPDX-License-Identifier: GPL-2.0
 #include <asm/uv.h>
+#include <asm/boot_data.h>
 #include <asm/facility.h>
 #include <asm/sections.h>
 
+#include "boot.h"
+#include "uv.h"
+
 /* will be used in arch/s390/kernel/uv.c */
 #ifdef CONFIG_PROTECTED_VIRTUALIZATION_GUEST
 int __bootdata_preserved(prot_virt_guest);
@@ -47,26 +51,34 @@ void uv_query_info(void)
 }
 
 #if IS_ENABLED(CONFIG_KVM)
-static bool has_uv_sec_stor_limit(void)
+void adjust_to_uv_max(unsigned long *vmax)
 {
-	/*
-	 * keep these conditions in line with setup_uv()
-	 */
-	if (!is_prot_virt_host())
-		return false;
+	if (is_prot_virt_host() && uv_info.max_sec_stor_addr)
+		*vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr);
+}
 
+static int is_prot_virt_host_capable(void)
+{
+	/* disable if no prot_virt=1 given on command-line */
+	if (!is_prot_virt_host())
+		return 0;
+	/* disable if protected guest virtualization is enabled */
 	if (is_prot_virt_guest())
-		return false;
-
+		return 0;
+	/* disable if no hardware support */
 	if (!test_facility(158))
-		return false;
-
-	return !!uv_info.max_sec_stor_addr;
+		return 0;
+	/* disable if kdump */
+	if (oldmem_data.start)
+		return 0;
+	/* disable if stand-alone dump */
+	if (ipl_block_valid && is_ipl_block_dump())
+		return 0;
+	return 1;
 }
 
-void adjust_to_uv_max(unsigned long *vmax)
+void sanitize_prot_virt_host(void)
 {
-	if (has_uv_sec_stor_limit())
-		*vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr);
+	prot_virt_host = is_prot_virt_host_capable();
 }
 #endif