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authorAlexander Gordeev <agordeev@linux.ibm.com>2022-05-26 07:57:36 +0200
committerAlexander Gordeev <agordeev@linux.ibm.com>2022-07-28 18:05:23 +0200
commit57ad19bcdefb1c65b0a90330b7b29ce658ef1a76 (patch)
tree9b0a352189585a61679366949595027dc6ad9dd8 /arch/s390
parents390/smp: enforce lowcore protection on CPU restart (diff)
downloadlinux-57ad19bcdefb1c65b0a90330b7b29ce658ef1a76.tar.xz
linux-57ad19bcdefb1c65b0a90330b7b29ce658ef1a76.zip
s390/boot: cleanup adjust_to_uv_max() function
Uncouple input and output arguments by making the latter the function return value. Reviewed-by: Heiko Carstens <hca@linux.ibm.com> Signed-off-by: Alexander Gordeev <agordeev@linux.ibm.com>
Diffstat (limited to 'arch/s390')
-rw-r--r--arch/s390/boot/startup.c10
-rw-r--r--arch/s390/boot/uv.c5
-rw-r--r--arch/s390/boot/uv.h7
3 files changed, 14 insertions, 8 deletions
diff --git a/arch/s390/boot/startup.c b/arch/s390/boot/startup.c
index 863e6bcaa5a1..bc48fe82d949 100644
--- a/arch/s390/boot/startup.c
+++ b/arch/s390/boot/startup.c
@@ -152,6 +152,7 @@ static void setup_kernel_memory_layout(void)
unsigned long vmemmap_start;
unsigned long rte_size;
unsigned long pages;
+ unsigned long vmax;
pages = ident_map_size / PAGE_SIZE;
/* vmemmap contains a multiple of PAGES_PER_SECTION struct pages */
@@ -163,10 +164,10 @@ static void setup_kernel_memory_layout(void)
vmalloc_size > _REGION2_SIZE ||
vmemmap_start + vmemmap_size + vmalloc_size + MODULES_LEN >
_REGION2_SIZE) {
- MODULES_END = _REGION1_SIZE;
+ vmax = _REGION1_SIZE;
rte_size = _REGION2_SIZE;
} else {
- MODULES_END = _REGION2_SIZE;
+ vmax = _REGION2_SIZE;
rte_size = _REGION3_SIZE;
}
/*
@@ -174,11 +175,12 @@ static void setup_kernel_memory_layout(void)
* secure storage limit, so that any vmalloc allocation
* we do could be used to back secure guest storage.
*/
- adjust_to_uv_max(&MODULES_END);
+ vmax = adjust_to_uv_max(vmax);
#ifdef CONFIG_KASAN
/* force vmalloc and modules below kasan shadow */
- MODULES_END = min(MODULES_END, KASAN_SHADOW_START);
+ vmax = min(vmax, KASAN_SHADOW_START);
#endif
+ MODULES_END = vmax;
MODULES_VADDR = MODULES_END - MODULES_LEN;
VMALLOC_END = MODULES_VADDR;
diff --git a/arch/s390/boot/uv.c b/arch/s390/boot/uv.c
index e6be155ab2e5..d13ce34ab9f1 100644
--- a/arch/s390/boot/uv.c
+++ b/arch/s390/boot/uv.c
@@ -51,10 +51,11 @@ void uv_query_info(void)
}
#if IS_ENABLED(CONFIG_KVM)
-void adjust_to_uv_max(unsigned long *vmax)
+unsigned long adjust_to_uv_max(unsigned long limit)
{
if (is_prot_virt_host() && uv_info.max_sec_stor_addr)
- *vmax = min_t(unsigned long, *vmax, uv_info.max_sec_stor_addr);
+ limit = min_t(unsigned long, limit, uv_info.max_sec_stor_addr);
+ return limit;
}
static int is_prot_virt_host_capable(void)
diff --git a/arch/s390/boot/uv.h b/arch/s390/boot/uv.h
index 690ce019af5a..0f3070856f8d 100644
--- a/arch/s390/boot/uv.h
+++ b/arch/s390/boot/uv.h
@@ -3,10 +3,13 @@
#define BOOT_UV_H
#if IS_ENABLED(CONFIG_KVM)
-void adjust_to_uv_max(unsigned long *vmax);
+unsigned long adjust_to_uv_max(unsigned long limit);
void sanitize_prot_virt_host(void);
#else
-static inline void adjust_to_uv_max(unsigned long *vmax) {}
+static inline unsigned long adjust_to_uv_max(unsigned long limit)
+{
+ return limit;
+}
static inline void sanitize_prot_virt_host(void) {}
#endif