summaryrefslogtreecommitdiff
path: root/arch/s390/kernel
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel')
-rw-r--r--arch/s390/kernel/asm-offsets.c2
-rw-r--r--arch/s390/kernel/entry.S26
-rw-r--r--arch/s390/kernel/head64.S2
-rw-r--r--arch/s390/kernel/vdso.c44
-rw-r--r--arch/s390/kernel/vdso32/getcpu.S16
-rw-r--r--arch/s390/kernel/vdso64/clock_gettime.S19
-rw-r--r--arch/s390/kernel/vdso64/getcpu.S15
7 files changed, 35 insertions, 89 deletions
diff --git a/arch/s390/kernel/asm-offsets.c b/arch/s390/kernel/asm-offsets.c
index 33ec80df7ed4..587b195b588d 100644
--- a/arch/s390/kernel/asm-offsets.c
+++ b/arch/s390/kernel/asm-offsets.c
@@ -171,6 +171,7 @@ int main(void)
OFFSET(__LC_RESTART_DATA, lowcore, restart_data);
OFFSET(__LC_RESTART_SOURCE, lowcore, restart_source);
OFFSET(__LC_USER_ASCE, lowcore, user_asce);
+ OFFSET(__LC_VDSO_ASCE, lowcore, vdso_asce);
OFFSET(__LC_LPP, lowcore, lpp);
OFFSET(__LC_CURRENT_PID, lowcore, current_pid);
OFFSET(__LC_PERCPU_OFFSET, lowcore, percpu_offset);
@@ -178,7 +179,6 @@ int main(void)
OFFSET(__LC_MACHINE_FLAGS, lowcore, machine_flags);
OFFSET(__LC_PREEMPT_COUNT, lowcore, preempt_count);
OFFSET(__LC_GMAP, lowcore, gmap);
- OFFSET(__LC_PASTE, lowcore, paste);
/* software defined ABI-relevant lowcore locations 0xe00 - 0xe20 */
OFFSET(__LC_DUMP_REIPL, lowcore, ipib);
/* hardware defined lowcore locations 0x1000 - 0x18ff */
diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index ee53ac7b1ab8..a316cd6999ad 100644
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -379,13 +379,21 @@ ENTRY(system_call)
jg s390_handle_mcck # TIF bit will be cleared by handler
#
-# _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce
+# _CIF_ASCE_PRIMARY and/or _CIF_ASCE_SECONDARY set, load user space asce
#
.Lsysc_asce:
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_SECONDARY
+ lctlg %c7,%c7,__LC_VDSO_ASCE # load secondary asce
+ TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_PRIMARY
+ jz .Lsysc_return
+#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES
+ tm __LC_STFLE_FAC_LIST+3,0x10 # has MVCOS ?
+ jnz .Lsysc_set_fs_fixup
ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
- TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_SECONDARY
- jz .Lsysc_return
+ j .Lsysc_return
+.Lsysc_set_fs_fixup:
+#endif
larl %r14,.Lsysc_return
jg set_fs_fixup
@@ -741,10 +749,18 @@ ENTRY(io_int_handler)
# _CIF_ASCE_PRIMARY and/or CIF_ASCE_SECONDARY set, load user space asce
#
.Lio_asce:
+ ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_SECONDARY
+ lctlg %c7,%c7,__LC_VDSO_ASCE # load secondary asce
+ TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_PRIMARY
+ jz .Lio_return
+#ifndef CONFIG_HAVE_MARCH_Z10_FEATURES
+ tm __LC_STFLE_FAC_LIST+3,0x10 # has MVCOS ?
+ jnz .Lio_set_fs_fixup
ni __LC_CPU_FLAGS+7,255-_CIF_ASCE_PRIMARY
lctlg %c1,%c1,__LC_USER_ASCE # load primary asce
- TSTMSK __LC_CPU_FLAGS,_CIF_ASCE_SECONDARY
- jz .Lio_return
+ j .Lio_return
+.Lio_set_fs_fixup:
+#endif
larl %r14,.Lio_return
jg set_fs_fixup
diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S
index 172002da7075..38a973ccf501 100644
--- a/arch/s390/kernel/head64.S
+++ b/arch/s390/kernel/head64.S
@@ -28,7 +28,7 @@ ENTRY(startup_continue)
lctlg %c0,%c15,.Lctl-.LPG1(%r13) # load control registers
lg %r12,.Lparmaddr-.LPG1(%r13) # pointer to parameter area
# move IPL device to lowcore
- lghi %r0,__LC_PASTE
+ larl %r0,boot_vdso_data
stg %r0,__LC_VDSO_PER_CPU
#
# Setup stack
diff --git a/arch/s390/kernel/vdso.c b/arch/s390/kernel/vdso.c
index 0520854a4dab..39a218703c50 100644
--- a/arch/s390/kernel/vdso.c
+++ b/arch/s390/kernel/vdso.c
@@ -158,16 +158,9 @@ int vdso_alloc_per_cpu(struct lowcore *lowcore)
{
unsigned long segment_table, page_table, page_frame;
struct vdso_per_cpu_data *vd;
- u32 *psal, *aste;
- int i;
-
- lowcore->vdso_per_cpu_data = __LC_PASTE;
-
- if (!vdso_enabled)
- return 0;
segment_table = __get_free_pages(GFP_KERNEL, SEGMENT_ORDER);
- page_table = get_zeroed_page(GFP_KERNEL | GFP_DMA);
+ page_table = get_zeroed_page(GFP_KERNEL);
page_frame = get_zeroed_page(GFP_KERNEL);
if (!segment_table || !page_table || !page_frame)
goto out;
@@ -179,25 +172,15 @@ int vdso_alloc_per_cpu(struct lowcore *lowcore)
vd->cpu_nr = lowcore->cpu_nr;
vd->node_id = cpu_to_node(vd->cpu_nr);
- /* Set up access register mode page table */
+ /* Set up page table for the vdso address space */
memset64((u64 *)segment_table, _SEGMENT_ENTRY_EMPTY, _CRST_ENTRIES);
memset64((u64 *)page_table, _PAGE_INVALID, PTRS_PER_PTE);
*(unsigned long *) segment_table = _SEGMENT_ENTRY + page_table;
*(unsigned long *) page_table = _PAGE_PROTECT + page_frame;
- psal = (u32 *) (page_table + 256*sizeof(unsigned long));
- aste = psal + 32;
-
- for (i = 4; i < 32; i += 4)
- psal[i] = 0x80000000;
-
- lowcore->paste[4] = (u32)(addr_t) psal;
- psal[0] = 0x02000000;
- psal[2] = (u32)(addr_t) aste;
- *(unsigned long *) (aste + 2) = segment_table +
+ lowcore->vdso_asce = segment_table +
_ASCE_TABLE_LENGTH + _ASCE_USER_BITS + _ASCE_TYPE_SEGMENT;
- aste[4] = (u32)(addr_t) psal;
lowcore->vdso_per_cpu_data = page_frame;
return 0;
@@ -212,14 +195,8 @@ out:
void vdso_free_per_cpu(struct lowcore *lowcore)
{
unsigned long segment_table, page_table, page_frame;
- u32 *psal, *aste;
-
- if (!vdso_enabled)
- return;
- psal = (u32 *)(addr_t) lowcore->paste[4];
- aste = (u32 *)(addr_t) psal[2];
- segment_table = *(unsigned long *)(aste + 2) & PAGE_MASK;
+ segment_table = lowcore->vdso_asce & PAGE_MASK;
page_table = *(unsigned long *) segment_table;
page_frame = *(unsigned long *) page_table;
@@ -228,16 +205,6 @@ void vdso_free_per_cpu(struct lowcore *lowcore)
free_pages(segment_table, SEGMENT_ORDER);
}
-static void vdso_init_cr5(void)
-{
- unsigned long cr5;
-
- if (!vdso_enabled)
- return;
- cr5 = offsetof(struct lowcore, paste);
- __ctl_load(cr5, 5, 5);
-}
-
/*
* This is called from binfmt_elf, we create the special vma for the
* vDSO and insert it into the mm struct tree
@@ -314,8 +281,6 @@ static int __init vdso_init(void)
{
int i;
- if (!vdso_enabled)
- return 0;
vdso_init_data(vdso_data);
#ifdef CONFIG_COMPAT
/* Calculate the size of the 32 bit vDSO */
@@ -354,7 +319,6 @@ static int __init vdso_init(void)
vdso64_pagelist[vdso64_pages] = NULL;
if (vdso_alloc_per_cpu(&S390_lowcore))
BUG();
- vdso_init_cr5();
get_page(virt_to_page(vdso_data));
diff --git a/arch/s390/kernel/vdso32/getcpu.S b/arch/s390/kernel/vdso32/getcpu.S
index 6e30769dd017..5477a2c112fb 100644
--- a/arch/s390/kernel/vdso32/getcpu.S
+++ b/arch/s390/kernel/vdso32/getcpu.S
@@ -15,23 +15,11 @@
.type __kernel_getcpu,@function
__kernel_getcpu:
.cfi_startproc
- ear %r1,%a4
- lhi %r4,1
- sll %r4,24
- sar %a4,%r4
la %r4,0
- epsw %r0,0
- sacf 512
+ sacf 256
l %r5,__VDSO_CPU_NR(%r4)
l %r4,__VDSO_NODE_ID(%r4)
- tml %r0,0x4000
- jo 1f
- tml %r0,0x8000
- jno 0f
- sacf 256
- j 1f
-0: sacf 0
-1: sar %a4,%r1
+ sacf 0
ltr %r2,%r2
jz 2f
st %r5,0(%r2)
diff --git a/arch/s390/kernel/vdso64/clock_gettime.S b/arch/s390/kernel/vdso64/clock_gettime.S
index 9c3b12626dba..5d7b56b49458 100644
--- a/arch/s390/kernel/vdso64/clock_gettime.S
+++ b/arch/s390/kernel/vdso64/clock_gettime.S
@@ -114,23 +114,12 @@ __kernel_clock_gettime:
br %r14
/* CPUCLOCK_VIRT for this thread */
-9: icm %r0,15,__VDSO_ECTG_OK(%r5)
+9: lghi %r4,0
+ icm %r0,15,__VDSO_ECTG_OK(%r5)
jz 12f
- ear %r2,%a4
- llilh %r4,0x0100
- sar %a4,%r4
- lghi %r4,0
- epsw %r5,0
- sacf 512 /* Magic ectg instruction */
+ sacf 256 /* Magic ectg instruction */
.insn ssf,0xc80100000000,__VDSO_ECTG_BASE(4),__VDSO_ECTG_USER(4),4
- tml %r5,0x4000
- jo 11f
- tml %r5,0x8000
- jno 10f
- sacf 256
- j 11f
-10: sacf 0
-11: sar %a4,%r2
+ sacf 0
algr %r1,%r0 /* r1 = cputime as TOD value */
mghi %r1,1000 /* convert to nanoseconds */
srlg %r1,%r1,12 /* r1 = cputime in nanosec */
diff --git a/arch/s390/kernel/vdso64/getcpu.S b/arch/s390/kernel/vdso64/getcpu.S
index 43983764b959..e9c34364d97b 100644
--- a/arch/s390/kernel/vdso64/getcpu.S
+++ b/arch/s390/kernel/vdso64/getcpu.S
@@ -15,22 +15,11 @@
.type __kernel_getcpu,@function
__kernel_getcpu:
.cfi_startproc
- ear %r1,%a4
- llilh %r4,0x0100
- sar %a4,%r4
la %r4,0
- epsw %r0,0
- sacf 512
+ sacf 256
l %r5,__VDSO_CPU_NR(%r4)
l %r4,__VDSO_NODE_ID(%r4)
- tml %r0,0x4000
- jo 1f
- tml %r0,0x8000
- jno 0f
- sacf 256
- j 1f
-0: sacf 0
-1: sar %a4,%r1
+ sacf 0
ltgr %r2,%r2
jz 2f
st %r5,0(%r2)
generated by cgit (git 2.34.1) at 2024-05-21 14:01:20 +0000