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s390/sclp: unify basic sclp access by exposing "struct sclp"

Browse source 
Let's unify basic access to sclp fields by storing the data in an external
struct in asm/sclp.h.

The values can now directly be accessed by other components, so there is
no need for most accessor functions and external variables anymore.

The mtid, mtid_max and facility part will be cleaned up separately.

Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
David Hildenbrand 2015-05-06 13:18:59 +02:00 • committed by Martin Schwidefsky
parent 9747bc47b3
commit 37c5f6c86c
14 changed files with 79 additions and 143 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
arch/s390/hypfs/hypfs_sprp.c
View file

@ -128,14 +128,14 @@ static struct hypfs_dbfs_file hypfs_sprp_file = {
int hypfs_sprp_init(void)
{
if (!sclp_has_sprp())
if (!sclp.has_sprp)
return 0;
return hypfs_dbfs_create_file(&hypfs_sprp_file);
}
void hypfs_sprp_exit(void)
{
if (!sclp_has_sprp())
if (!sclp.has_sprp)
return;
hypfs_dbfs_remove_file(&hypfs_sprp_file);
}

31
arch/s390/include/asm/sclp.h
View file

@ -46,33 +46,40 @@ struct sclp_cpu_info {
struct sclp_cpu_entry cpu[MAX_CPU_ADDRESS + 1];
};
struct sclp_info {
unsigned char has_linemode : 1;
unsigned char has_vt220 : 1;
unsigned char has_siif : 1;
unsigned char has_sigpif : 1;
unsigned char has_cpu_type : 1;
unsigned char has_sprp : 1;
unsigned int ibc;
unsigned int mtid;
unsigned int mtid_cp;
unsigned int mtid_prev;
unsigned long long rzm;
unsigned long long rnmax;
unsigned long long hamax;
unsigned int max_cpu;
unsigned long hsa_size;
};
extern struct sclp_info sclp;
int sclp_get_cpu_info(struct sclp_cpu_info *info);
int sclp_cpu_configure(u8 cpu);
int sclp_cpu_deconfigure(u8 cpu);
unsigned long long sclp_get_rnmax(void);
unsigned long long sclp_get_rzm(void);
unsigned int sclp_get_max_cpu(void);
unsigned int sclp_get_mtid(u8 cpu_type);
unsigned int sclp_get_mtid_max(void);
unsigned int sclp_get_mtid_prev(void);
int sclp_sdias_blk_count(void);
int sclp_sdias_copy(void *dest, int blk_num, int nr_blks);
int sclp_chp_configure(struct chp_id chpid);
int sclp_chp_deconfigure(struct chp_id chpid);
int sclp_chp_read_info(struct sclp_chp_info *info);
void sclp_get_ipl_info(struct sclp_ipl_info *info);
bool __init sclp_has_linemode(void);
bool __init sclp_has_vt220(void);
bool sclp_has_sprp(void);
int sclp_pci_configure(u32 fid);
int sclp_pci_deconfigure(u32 fid);
int memcpy_hsa(void *dest, unsigned long src, size_t count, int mode);
unsigned long sclp_get_hsa_size(void);
void sclp_early_detect(void);
int sclp_has_siif(void);
int sclp_has_sigpif(void);
unsigned int sclp_get_ibc(void);
long _sclp_print_early(const char *);
#endif /* _ASM_S390_SCLP_H */

8
arch/s390/kernel/crash_dump.c
View file

@ -122,7 +122,7 @@ static ssize_t copy_oldmem_page_zfcpdump(char *buf, size_t csize,
{
int rc;
if (src < sclp_get_hsa_size()) {
if (src < sclp.hsa_size) {
rc = memcpy_hsa(buf, src, csize, userbuf);
} else {
if (userbuf)
@ -215,7 +215,7 @@ static int remap_oldmem_pfn_range_zfcpdump(struct vm_area_struct *vma,
unsigned long pfn,
unsigned long size, pgprot_t prot)
{
unsigned long hsa_end = sclp_get_hsa_size();
unsigned long hsa_end = sclp.hsa_size;
unsigned long size_hsa;
if (pfn < hsa_end >> PAGE_SHIFT) {
@ -258,7 +258,7 @@ int copy_from_oldmem(void *dest, void *src, size_t count)
return rc;
}
} else {
unsigned long hsa_end = sclp_get_hsa_size();
unsigned long hsa_end = sclp.hsa_size;
if ((unsigned long) src < hsa_end) {
copied = min(count, hsa_end - (unsigned long) src);
rc = memcpy_hsa(dest, (unsigned long) src, copied, 0);
@ -609,7 +609,7 @@ int elfcorehdr_alloc(unsigned long long *addr, unsigned long long *size)
if (elfcorehdr_addr != ELFCORE_ADDR_MAX)
return 0;
/* If we cannot get HSA size for zfcpdump return error */
if (ipl_info.type == IPL_TYPE_FCP_DUMP && !sclp_get_hsa_size())
if (ipl_info.type == IPL_TYPE_FCP_DUMP && !sclp.hsa_size)
return -ENODEV;
/* For kdump, exclude previous crashkernel memory */

10
arch/s390/kernel/setup.c
View file

@ -128,9 +128,9 @@ __setup("condev=", condev_setup);
static void __init set_preferred_console(void)
{
if (MACHINE_IS_KVM) {
if (sclp_has_vt220())
if (sclp.has_vt220)
add_preferred_console("ttyS", 1, NULL);
else if (sclp_has_linemode())
else if (sclp.has_linemode)
add_preferred_console("ttyS", 0, NULL);
else
add_preferred_console("hvc", 0, NULL);
@ -510,8 +510,8 @@ static void reserve_memory_end(void)
{
#ifdef CONFIG_CRASH_DUMP
if (ipl_info.type == IPL_TYPE_FCP_DUMP &&
!OLDMEM_BASE && sclp_get_hsa_size()) {
memory_end = sclp_get_hsa_size();
!OLDMEM_BASE && sclp.hsa_size) {
memory_end = sclp.hsa_size;
memory_end &= PAGE_MASK;
memory_end_set = 1;
}
@ -576,7 +576,7 @@ static void __init reserve_crashkernel(void)
crash_base = low;
} else {
/* Find suitable area in free memory */
low = max_t(unsigned long, crash_size, sclp_get_hsa_size());
low = max_t(unsigned long, crash_size, sclp.hsa_size);
high = crash_base ? crash_base + crash_size : ULONG_MAX;
if (crash_base && crash_base < low) {

4
arch/s390/kernel/smp.c
View file

@ -601,7 +601,7 @@ static void __init smp_store_cpu_states(struct sclp_cpu_info *info)
/* No previous system present, normal boot. */
return;
/* Set multi-threading state to the previous system. */
pcpu_set_smt(sclp_get_mtid_prev());
pcpu_set_smt(sclp.mtid_prev);
/* Collect CPU states. */
cpu = 0;
for (i = 0; i < info->configured; i++) {
@ -883,7 +883,7 @@ void __init smp_fill_possible_mask(void)
unsigned int possible, sclp_max, cpu;
sclp_max = min(smp_max_threads, sclp_get_mtid_max() + 1);
sclp_max = sclp_get_max_cpu() * sclp_max ?: nr_cpu_ids;
sclp_max = sclp.max_cpu * sclp_max ?: nr_cpu_ids;
possible = setup_possible_cpus ?: nr_cpu_ids;
possible = min(possible, sclp_max);
for (cpu = 0; cpu < possible && cpu < nr_cpu_ids; cpu++)

4
arch/s390/kvm/interrupt.c
View file

@ -799,7 +799,7 @@ int kvm_s390_ext_call_pending(struct kvm_vcpu *vcpu)
struct kvm_s390_local_interrupt *li = &vcpu->arch.local_int;
uint8_t sigp_ctrl = vcpu->kvm->arch.sca->cpu[vcpu->vcpu_id].sigp_ctrl;
if (!sclp_has_sigpif())
if (!sclp.has_sigpif)
return test_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs);
return (sigp_ctrl & SIGP_CTRL_C) &&
@ -1058,7 +1058,7 @@ static int __inject_extcall(struct kvm_vcpu *vcpu, struct kvm_s390_irq *irq)
kvm_get_vcpu(vcpu->kvm, src_id) == NULL)
return -EINVAL;
if (sclp_has_sigpif())
if (sclp.has_sigpif)
return __inject_extcall_sigpif(vcpu, src_id);
if (!test_and_set_bit(IRQ_PEND_EXT_EXTERNAL, &li->pending_irqs))

8
arch/s390/kvm/kvm-s390.c
View file

@ -604,7 +604,7 @@ static int kvm_s390_get_machine(struct kvm *kvm, struct kvm_device_attr *attr)
goto out;
}
get_cpu_id((struct cpuid *) &mach->cpuid);
mach->ibc = sclp_get_ibc();
mach->ibc = sclp.ibc;
memcpy(&mach->fac_mask, kvm->arch.model.fac->mask,
S390_ARCH_FAC_LIST_SIZE_BYTE);
memcpy((unsigned long *)&mach->fac_list, S390_lowcore.stfle_fac_list,
@ -1068,7 +1068,7 @@ int kvm_arch_init_vm(struct kvm *kvm, unsigned long type)
S390_ARCH_FAC_LIST_SIZE_BYTE);
kvm_s390_get_cpu_id(&kvm->arch.model.cpu_id);
kvm->arch.model.ibc = sclp_get_ibc() & 0x0fff;
kvm->arch.model.ibc = sclp.ibc & 0x0fff;
if (kvm_s390_crypto_init(kvm) < 0)
goto out_err;
@ -1321,9 +1321,9 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu)
vcpu->arch.sie_block->ecb2 = 8;
vcpu->arch.sie_block->eca = 0xC1002000U;
if (sclp_has_siif())
if (sclp.has_siif)
vcpu->arch.sie_block->eca |= 1;
if (sclp_has_sigpif())
if (sclp.has_sigpif)
vcpu->arch.sie_block->eca |= 0x10000000U;
if (test_kvm_facility(vcpu->kvm, 129)) {
vcpu->arch.sie_block->eca |= 0x00020000;

2
arch/s390/mm/init.c
View file

@ -213,7 +213,7 @@ unsigned long memory_block_size_bytes(void)
* Make sure the memory block size is always greater
* or equal than the memory increment size.
*/
return max_t(unsigned long, MIN_MEMORY_BLOCK_SIZE, sclp_get_rzm());
return max_t(unsigned long, MIN_MEMORY_BLOCK_SIZE, sclp.rzm);
}
#ifdef CONFIG_MEMORY_HOTREMOVE

4
arch/s390/mm/mem_detect.c
View file

@ -31,8 +31,8 @@ void __init detect_memory_memblock(void)
unsigned long addr, size;
int type;
rzm = sclp_get_rzm();
rnmax = sclp_get_rnmax();
rzm = sclp.rzm;
rnmax = sclp.rnmax;
memsize = rzm * rnmax;
if (!rzm)
rzm = 1ULL << 17;

3
drivers/s390/char/sclp.h
View file

@ -191,9 +191,6 @@ void sclp_sdias_exit(void);
extern int sclp_console_pages;
extern int sclp_console_drop;
extern unsigned long sclp_console_full;
extern u8 sclp_fac84;
extern unsigned long long sclp_rzm;
extern unsigned long long sclp_rnmax;
/* useful inlines */

25
drivers/s390/char/sclp_cmd.c
View file

@ -101,7 +101,7 @@ static void sclp_fill_cpu_info(struct sclp_cpu_info *info,
info->configured = sccb->nr_configured;
info->standby = sccb->nr_standby;
info->combined = sccb->nr_configured + sccb->nr_standby;
info->has_cpu_type = sclp_fac84 & 0x1;
info->has_cpu_type = sclp.has_cpu_type;
memcpy(&info->cpu, page + sccb->offset_configured,
info->combined * sizeof(struct sclp_cpu_entry));
}
@ -202,14 +202,14 @@ struct assign_storage_sccb {
int arch_get_memory_phys_device(unsigned long start_pfn)
{
if (!sclp_rzm)
if (!sclp.rzm)
return 0;
return PFN_PHYS(start_pfn) >> ilog2(sclp_rzm);
return PFN_PHYS(start_pfn) >> ilog2(sclp.rzm);
}
static unsigned long long rn2addr(u16 rn)
{
return (unsigned long long) (rn - 1) * sclp_rzm;
return (unsigned long long) (rn - 1) * sclp.rzm;
}
static int do_assign_storage(sclp_cmdw_t cmd, u16 rn)
@ -250,7 +250,7 @@ static int sclp_assign_storage(u16 rn)
if (rc)
return rc;
start = rn2addr(rn);
storage_key_init_range(start, start + sclp_rzm);
storage_key_init_range(start, start + sclp.rzm);
return 0;
}
@ -309,7 +309,7 @@ static int sclp_mem_change_state(unsigned long start, unsigned long size,
istart = rn2addr(incr->rn);
if (start + size - 1 < istart)
break;
if (start > istart + sclp_rzm - 1)
if (start > istart + sclp.rzm - 1)
continue;
if (online)
rc |= sclp_assign_storage(incr->rn);
@ -330,7 +330,7 @@ static bool contains_standby_increment(unsigned long start, unsigned long end)
istart = rn2addr(incr->rn);
if (end - 1 < istart)
continue;
if (start > istart + sclp_rzm - 1)
if (start > istart + sclp.rzm - 1)
continue;
if (incr->standby)
return true;
@ -415,7 +415,7 @@ static void __init add_memory_merged(u16 rn)
if (!first_rn)
goto skip_add;
start = rn2addr(first_rn);
size = (unsigned long long) num * sclp_rzm;
size = (unsigned long long) num * sclp.rzm;
if (start >= VMEM_MAX_PHYS)
goto skip_add;
if (start + size > VMEM_MAX_PHYS)
@ -465,7 +465,7 @@ static void __init insert_increment(u16 rn, int standby, int assigned)
}
if (!assigned)
new_incr->rn = last_rn + 1;
if (new_incr->rn > sclp_rnmax) {
if (new_incr->rn > sclp.rnmax) {
kfree(new_incr);
return;
}
@ -550,7 +550,7 @@ static int __init sclp_detect_standby_memory(void)
}
if (rc || list_empty(&sclp_mem_list))
goto out;
for (i = 1; i <= sclp_rnmax - assigned; i++)
for (i = 1; i <= sclp.rnmax - assigned; i++)
insert_increment(0, 1, 0);
rc = register_memory_notifier(&sclp_mem_nb);
if (rc)
@ -753,8 +753,3 @@ out:
free_page((unsigned long) sccb);
return rc;
}
bool sclp_has_sprp(void)
{
return !!(sclp_fac84 & 0x2);
}

105
drivers/s390/char/sclp_early.c
View file

@ -48,23 +48,12 @@ struct read_info_sccb {
} __packed __aligned(PAGE_SIZE);
static char sccb_early[PAGE_SIZE] __aligned(PAGE_SIZE) __initdata;
static unsigned int sclp_con_has_vt220 __initdata;
static unsigned int sclp_con_has_linemode __initdata;
static unsigned long sclp_hsa_size;
static unsigned int sclp_max_cpu;
static struct sclp_ipl_info sclp_ipl_info;
static unsigned char sclp_siif;
static unsigned char sclp_sigpif;
static u32 sclp_ibc;
static unsigned int sclp_mtid;
static unsigned int sclp_mtid_cp;
static unsigned int sclp_mtid_max;
static unsigned int sclp_mtid_prev;
struct sclp_info sclp;
EXPORT_SYMBOL(sclp);
u64 sclp_facilities;
u8 sclp_fac84;
unsigned long long sclp_rzm;
unsigned long long sclp_rnmax;
static int __init sclp_cmd_sync_early(sclp_cmdw_t cmd, void *sccb)
{
@ -118,21 +107,22 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
return;
sclp_facilities = sccb->facilities;
sclp_fac84 = sccb->fac84;
sclp.has_sprp = !!(sccb->fac84 & 0x02);
sclp.has_cpu_type = !!(sccb->fac84 & 0x01);
if (sccb->fac85 & 0x02)
S390_lowcore.machine_flags |= MACHINE_FLAG_ESOP;
sclp_rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
sclp_rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
sclp_rzm <<= 20;
sclp_ibc = sccb->ibc;
sclp.rnmax = sccb->rnmax ? sccb->rnmax : sccb->rnmax2;
sclp.rzm = sccb->rnsize ? sccb->rnsize : sccb->rnsize2;
sclp.rzm <<= 20;
sclp.ibc = sccb->ibc;
if (!sccb->hcpua) {
if (MACHINE_IS_VM)
sclp_max_cpu = 64;
sclp.max_cpu = 64;
else
sclp_max_cpu = sccb->ncpurl;
sclp.max_cpu = sccb->ncpurl;
} else {
sclp_max_cpu = sccb->hcpua + 1;
sclp.max_cpu = sccb->hcpua + 1;
}
boot_cpu_address = stap();
@ -140,8 +130,8 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
for (cpu = 0; cpu < sccb->ncpurl; cpue++, cpu++) {
if (boot_cpu_address != cpue->core_id)
continue;
sclp_siif = cpue->siif;
sclp_sigpif = cpue->sigpif;
sclp.has_siif = cpue->siif;
sclp.has_sigpif = cpue->sigpif;
break;
}
@ -151,58 +141,15 @@ static void __init sclp_facilities_detect(struct read_info_sccb *sccb)
sclp_ipl_info.has_dump = 1;
memcpy(&sclp_ipl_info.loadparm, &sccb->loadparm, LOADPARM_LEN);
sclp_mtid = (sccb->fac42 & 0x80) ? (sccb->fac42 & 31) : 0;
sclp_mtid_cp = (sccb->fac42 & 0x80) ? (sccb->fac43 & 31) : 0;
sclp_mtid_max = max(sclp_mtid, sclp_mtid_cp);
sclp_mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
sclp.mtid = (sccb->fac42 & 0x80) ? (sccb->fac42 & 31) : 0;
sclp.mtid_cp = (sccb->fac42 & 0x80) ? (sccb->fac43 & 31) : 0;
sclp_mtid_max = max(sclp.mtid, sclp.mtid_cp);
sclp.mtid_prev = (sccb->fac42 & 0x80) ? (sccb->fac66 & 31) : 0;
}
bool __init sclp_has_linemode(void)
{
return !!sclp_con_has_linemode;
}
bool __init sclp_has_vt220(void)
{
return !!sclp_con_has_vt220;
}
unsigned long long sclp_get_rnmax(void)
{
return sclp_rnmax;
}
unsigned long long sclp_get_rzm(void)
{
return sclp_rzm;
}
unsigned int sclp_get_max_cpu(void)
{
return sclp_max_cpu;
}
int sclp_has_siif(void)
{
return sclp_siif;
}
EXPORT_SYMBOL(sclp_has_siif);
int sclp_has_sigpif(void)
{
return sclp_sigpif;
}
EXPORT_SYMBOL(sclp_has_sigpif);
unsigned int sclp_get_ibc(void)
{
return sclp_ibc;
}
EXPORT_SYMBOL(sclp_get_ibc);
unsigned int sclp_get_mtid(u8 cpu_type)
{
return cpu_type ? sclp_mtid : sclp_mtid_cp;
return cpu_type ? sclp.mtid : sclp.mtid_cp;
}
unsigned int sclp_get_mtid_max(void)
@ -210,11 +157,6 @@ unsigned int sclp_get_mtid_max(void)
return sclp_mtid_max;
}
unsigned int sclp_get_mtid_prev(void)
{
return sclp_mtid_prev;
}
/*
* This function will be called after sclp_facilities_detect(), which gets
* called from early.c code. The sclp_facilities_detect() function retrieves
@ -286,11 +228,6 @@ static long __init sclp_hsa_copy_wait(struct sccb_header *sccb)
return (((struct sdias_sccb *) sccb)->evbuf.blk_cnt - 1) * PAGE_SIZE;
}
unsigned long sclp_get_hsa_size(void)
{
return sclp_hsa_size;
}
static void __init sclp_hsa_size_detect(void *sccb)
{
long size;
@ -313,7 +250,7 @@ static void __init sclp_hsa_size_detect(void *sccb)
if (size < 0)
return;
out:
sclp_hsa_size = size;
sclp.hsa_size = size;
}
static unsigned int __init sclp_con_check_linemode(struct init_sccb *sccb)
@ -331,10 +268,10 @@ static void __init sclp_console_detect(struct init_sccb *sccb)
return;
if (sccb->sclp_send_mask & EVTYP_VT220MSG_MASK)
sclp_con_has_vt220 = 1;
sclp.has_vt220 = 1;
if (sclp_con_check_linemode(sccb))
sclp_con_has_linemode = 1;
sclp.has_linemode = 1;
}
void __init sclp_early_detect(void)

10
drivers/s390/char/zcore.c
View file

@ -330,9 +330,9 @@ static ssize_t zcore_read(struct file *file, char __user *buf, size_t count,
mem_offs = 0;
/* Copy from HSA data */
if (*ppos < sclp_get_hsa_size() + HEADER_SIZE) {
if (*ppos < sclp.hsa_size + HEADER_SIZE) {
size = min((count - hdr_count),
(size_t) (sclp_get_hsa_size() - mem_start));
(size_t) (sclp.hsa_size - mem_start));
rc = memcpy_hsa_user(buf + hdr_count, mem_start, size);
if (rc)
goto fail;
@ -483,7 +483,7 @@ static ssize_t zcore_hsa_read(struct file *filp, char __user *buf,
static char str[18];
if (hsa_available)
snprintf(str, sizeof(str), "%lx\n", sclp_get_hsa_size());
snprintf(str, sizeof(str), "%lx\n", sclp.hsa_size);
else
snprintf(str, sizeof(str), "0\n");
return simple_read_from_buffer(buf, count, ppos, str, strlen(str));
@ -558,7 +558,7 @@ static int __init sys_info_init(enum arch_id arch, unsigned long mem_end)
static int __init check_sdias(void)
{
if (!sclp_get_hsa_size()) {
if (!sclp.hsa_size) {
TRACE("Could not determine HSA size\n");
return -ENODEV;
}
@ -619,7 +619,7 @@ static int __init zcore_reipl_init(void)
ipl_block = (void *) __get_free_page(GFP_KERNEL);
if (!ipl_block)
return -ENOMEM;
if (ipib_info.ipib < sclp_get_hsa_size())
if (ipib_info.ipib < sclp.hsa_size)
rc = memcpy_hsa_kernel(ipl_block, ipib_info.ipib, PAGE_SIZE);
else
rc = memcpy_real(ipl_block, (void *) ipib_info.ipib, PAGE_SIZE);

4
drivers/s390/kvm/kvm_virtio.c
View file

@ -450,7 +450,7 @@ static int __init test_devices_support(unsigned long addr)
static int __init kvm_devices_init(void)
{
int rc;
unsigned long total_memory_size = sclp_get_rzm() * sclp_get_rnmax();
unsigned long total_memory_size = sclp.rzm * sclp.rnmax;
if (!MACHINE_IS_KVM)
return -ENODEV;
@ -497,7 +497,7 @@ static __init int early_put_chars(u32 vtermno, const char *buf, int count)
static int __init s390_virtio_console_init(void)
{
if (sclp_has_vt220() || sclp_has_linemode())
if (sclp.has_vt220 || sclp.has_linemode)
return -ENODEV;
return virtio_cons_early_init(early_put_chars);
}