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Commit 37c5f6c8 authored by David Hildenbrand's avatar David Hildenbrand Committed by Martin Schwidefsky
Browse files

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



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: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: default avatarDavid Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: default avatarMartin Schwidefsky <schwidefsky@de.ibm.com>
parent 9747bc47

arch/s390/hypfs/hypfs_sprp.c

+2 −2
Original line number Diff line number Diff line
@@ -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);

}

arch/s390/include/asm/sclp.h

+19 −12
Original line number Diff line number Diff line
@@ -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 */

arch/s390/kernel/crash_dump.c

+4 −4
Original line number Diff line number Diff line
@@ -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 */

arch/s390/kernel/setup.c

+5 −5
Original line number Diff line number Diff line
@@ -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) {

arch/s390/kernel/smp.c

+2 −2
Original line number Diff line number Diff line
@@ -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++)