#include <linux/cpufeature.h>
#include <linux/bitops.h>
#include <linux/kernel.h>
+#include <linux/random.h>
#include <linux/sched/mm.h>
#include <linux/init.h>
#include <linux/seq_file.h>
#include <asm/elf.h>
#include <asm/lowcore.h>
#include <asm/param.h>
+#include <asm/sclp.h>
#include <asm/smp.h>
+unsigned long __read_mostly elf_hwcap;
+char elf_platform[ELF_PLATFORM_SIZE];
+
+unsigned long int_hwcap;
+
struct cpu_info {
unsigned int cpu_mhz_dynamic;
unsigned int cpu_mhz_static;
}
}
+/*
+ * Setup hardware capabilities.
+ */
+static int __init setup_hwcaps(void)
+{
+ static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 };
+ struct cpuid cpu_id;
+ int i;
+
+ /*
+ * The store facility list bits numbers as found in the principles
+ * of operation are numbered with bit 1UL<<31 as number 0 to
+ * bit 1UL<<0 as number 31.
+ * Bit 0: instructions named N3, "backported" to esa-mode
+ * Bit 2: z/Architecture mode is active
+ * Bit 7: the store-facility-list-extended facility is installed
+ * Bit 17: the message-security assist is installed
+ * Bit 19: the long-displacement facility is installed
+ * Bit 21: the extended-immediate facility is installed
+ * Bit 22: extended-translation facility 3 is installed
+ * Bit 30: extended-translation facility 3 enhancement facility
+ * These get translated to:
+ * HWCAP_ESAN3 bit 0, HWCAP_ZARCH bit 1,
+ * HWCAP_STFLE bit 2, HWCAP_MSA bit 3,
+ * HWCAP_LDISP bit 4, HWCAP_EIMM bit 5 and
+ * HWCAP_ETF3EH bit 8 (22 && 30).
+ */
+ for (i = 0; i < 6; i++)
+ if (test_facility(stfl_bits[i]))
+ elf_hwcap |= 1UL << i;
+
+ if (test_facility(22) && test_facility(30))
+ elf_hwcap |= HWCAP_ETF3EH;
+
+ /*
+ * Check for additional facilities with store-facility-list-extended.
+ * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0
+ * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information
+ * as stored by stfl, bits 32-xxx contain additional facilities.
+ * How many facility words are stored depends on the number of
+ * doublewords passed to the instruction. The additional facilities
+ * are:
+ * Bit 42: decimal floating point facility is installed
+ * Bit 44: perform floating point operation facility is installed
+ * translated to:
+ * HWCAP_DFP bit 6 (42 && 44).
+ */
+ if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44))
+ elf_hwcap |= HWCAP_DFP;
+
+ /*
+ * Huge page support HWCAP_HPAGE is bit 7.
+ */
+ if (MACHINE_HAS_EDAT1)
+ elf_hwcap |= HWCAP_HPAGE;
+
+ /*
+ * 64-bit register support for 31-bit processes
+ * HWCAP_HIGH_GPRS is bit 9.
+ */
+ elf_hwcap |= HWCAP_HIGH_GPRS;
+
+ /*
+ * Transactional execution support HWCAP_TE is bit 10.
+ */
+ if (MACHINE_HAS_TE)
+ elf_hwcap |= HWCAP_TE;
+
+ /*
+ * Vector extension HWCAP_VXRS is bit 11. The Vector extension
+ * can be disabled with the "novx" parameter. Use MACHINE_HAS_VX
+ * instead of facility bit 129.
+ */
+ if (MACHINE_HAS_VX) {
+ elf_hwcap |= HWCAP_VXRS;
+ if (test_facility(134))
+ elf_hwcap |= HWCAP_VXRS_BCD;
+ if (test_facility(135))
+ elf_hwcap |= HWCAP_VXRS_EXT;
+ if (test_facility(148))
+ elf_hwcap |= HWCAP_VXRS_EXT2;
+ if (test_facility(152))
+ elf_hwcap |= HWCAP_VXRS_PDE;
+ if (test_facility(192))
+ elf_hwcap |= HWCAP_VXRS_PDE2;
+ }
+ if (test_facility(150))
+ elf_hwcap |= HWCAP_SORT;
+ if (test_facility(151))
+ elf_hwcap |= HWCAP_DFLT;
+ if (test_facility(165))
+ elf_hwcap |= HWCAP_NNPA;
+
+ /*
+ * Guarded storage support HWCAP_GS is bit 12.
+ */
+ if (MACHINE_HAS_GS)
+ elf_hwcap |= HWCAP_GS;
+ if (MACHINE_HAS_PCI_MIO)
+ elf_hwcap |= HWCAP_PCI_MIO;
+
+ get_cpu_id(&cpu_id);
+ add_device_randomness(&cpu_id, sizeof(cpu_id));
+ switch (cpu_id.machine) {
+ case 0x2064:
+ case 0x2066:
+ default: /* Use "z900" as default for 64 bit kernels. */
+ strcpy(elf_platform, "z900");
+ break;
+ case 0x2084:
+ case 0x2086:
+ strcpy(elf_platform, "z990");
+ break;
+ case 0x2094:
+ case 0x2096:
+ strcpy(elf_platform, "z9-109");
+ break;
+ case 0x2097:
+ case 0x2098:
+ strcpy(elf_platform, "z10");
+ break;
+ case 0x2817:
+ case 0x2818:
+ strcpy(elf_platform, "z196");
+ break;
+ case 0x2827:
+ case 0x2828:
+ strcpy(elf_platform, "zEC12");
+ break;
+ case 0x2964:
+ case 0x2965:
+ strcpy(elf_platform, "z13");
+ break;
+ case 0x3906:
+ case 0x3907:
+ strcpy(elf_platform, "z14");
+ break;
+ case 0x8561:
+ case 0x8562:
+ strcpy(elf_platform, "z15");
+ break;
+ }
+
+ /*
+ * Virtualization support HWCAP_INT_SIE is bit 0.
+ */
+ if (sclp.has_sief2)
+ int_hwcap |= HWCAP_INT_SIE;
+
+ return 0;
+}
+arch_initcall(setup_hwcaps);
+
static void show_cpu_topology(struct seq_file *m, unsigned long n)
{
#ifdef CONFIG_SCHED_TOPOLOGY
unsigned int console_irq = -1;
EXPORT_SYMBOL(console_irq);
-unsigned long elf_hwcap __read_mostly = 0;
-char elf_platform[ELF_PLATFORM_SIZE];
-
-unsigned long int_hwcap = 0;
-
/*
* Some code and data needs to stay below 2 GB, even when the kernel would be
* relocated above 2 GB, because it has to use 31 bit addresses.
__ctl_load(cr15.val, 15, 15);
}
-/*
- * Setup hardware capabilities.
- */
-static int __init setup_hwcaps(void)
-{
- static const int stfl_bits[6] = { 0, 2, 7, 17, 19, 21 };
- struct cpuid cpu_id;
- int i;
-
- /*
- * The store facility list bits numbers as found in the principles
- * of operation are numbered with bit 1UL<<31 as number 0 to
- * bit 1UL<<0 as number 31.
- * Bit 0: instructions named N3, "backported" to esa-mode
- * Bit 2: z/Architecture mode is active
- * Bit 7: the store-facility-list-extended facility is installed
- * Bit 17: the message-security assist is installed
- * Bit 19: the long-displacement facility is installed
- * Bit 21: the extended-immediate facility is installed
- * Bit 22: extended-translation facility 3 is installed
- * Bit 30: extended-translation facility 3 enhancement facility
- * These get translated to:
- * HWCAP_ESAN3 bit 0, HWCAP_ZARCH bit 1,
- * HWCAP_STFLE bit 2, HWCAP_MSA bit 3,
- * HWCAP_LDISP bit 4, HWCAP_EIMM bit 5 and
- * HWCAP_ETF3EH bit 8 (22 && 30).
- */
- for (i = 0; i < 6; i++)
- if (test_facility(stfl_bits[i]))
- elf_hwcap |= 1UL << i;
-
- if (test_facility(22) && test_facility(30))
- elf_hwcap |= HWCAP_ETF3EH;
-
- /*
- * Check for additional facilities with store-facility-list-extended.
- * stfle stores doublewords (8 byte) with bit 1ULL<<63 as bit 0
- * and 1ULL<<0 as bit 63. Bits 0-31 contain the same information
- * as stored by stfl, bits 32-xxx contain additional facilities.
- * How many facility words are stored depends on the number of
- * doublewords passed to the instruction. The additional facilities
- * are:
- * Bit 42: decimal floating point facility is installed
- * Bit 44: perform floating point operation facility is installed
- * translated to:
- * HWCAP_DFP bit 6 (42 && 44).
- */
- if ((elf_hwcap & (1UL << 2)) && test_facility(42) && test_facility(44))
- elf_hwcap |= HWCAP_DFP;
-
- /*
- * Huge page support HWCAP_HPAGE is bit 7.
- */
- if (MACHINE_HAS_EDAT1)
- elf_hwcap |= HWCAP_HPAGE;
-
- /*
- * 64-bit register support for 31-bit processes
- * HWCAP_HIGH_GPRS is bit 9.
- */
- elf_hwcap |= HWCAP_HIGH_GPRS;
-
- /*
- * Transactional execution support HWCAP_TE is bit 10.
- */
- if (MACHINE_HAS_TE)
- elf_hwcap |= HWCAP_TE;
-
- /*
- * Vector extension HWCAP_VXRS is bit 11. The Vector extension
- * can be disabled with the "novx" parameter. Use MACHINE_HAS_VX
- * instead of facility bit 129.
- */
- if (MACHINE_HAS_VX) {
- elf_hwcap |= HWCAP_VXRS;
- if (test_facility(134))
- elf_hwcap |= HWCAP_VXRS_BCD;
- if (test_facility(135))
- elf_hwcap |= HWCAP_VXRS_EXT;
- if (test_facility(148))
- elf_hwcap |= HWCAP_VXRS_EXT2;
- if (test_facility(152))
- elf_hwcap |= HWCAP_VXRS_PDE;
- if (test_facility(192))
- elf_hwcap |= HWCAP_VXRS_PDE2;
- }
- if (test_facility(150))
- elf_hwcap |= HWCAP_SORT;
- if (test_facility(151))
- elf_hwcap |= HWCAP_DFLT;
- if (test_facility(165))
- elf_hwcap |= HWCAP_NNPA;
-
- /*
- * Guarded storage support HWCAP_GS is bit 12.
- */
- if (MACHINE_HAS_GS)
- elf_hwcap |= HWCAP_GS;
- if (MACHINE_HAS_PCI_MIO)
- elf_hwcap |= HWCAP_PCI_MIO;
-
- get_cpu_id(&cpu_id);
- add_device_randomness(&cpu_id, sizeof(cpu_id));
- switch (cpu_id.machine) {
- case 0x2064:
- case 0x2066:
- default: /* Use "z900" as default for 64 bit kernels. */
- strcpy(elf_platform, "z900");
- break;
- case 0x2084:
- case 0x2086:
- strcpy(elf_platform, "z990");
- break;
- case 0x2094:
- case 0x2096:
- strcpy(elf_platform, "z9-109");
- break;
- case 0x2097:
- case 0x2098:
- strcpy(elf_platform, "z10");
- break;
- case 0x2817:
- case 0x2818:
- strcpy(elf_platform, "z196");
- break;
- case 0x2827:
- case 0x2828:
- strcpy(elf_platform, "zEC12");
- break;
- case 0x2964:
- case 0x2965:
- strcpy(elf_platform, "z13");
- break;
- case 0x3906:
- case 0x3907:
- strcpy(elf_platform, "z14");
- break;
- case 0x8561:
- case 0x8562:
- strcpy(elf_platform, "z15");
- break;
- }
-
- /*
- * Virtualization support HWCAP_INT_SIE is bit 0.
- */
- if (sclp.has_sief2)
- int_hwcap |= HWCAP_INT_SIE;
-
- return 0;
-}
-arch_initcall(setup_hwcaps);
-
/*
* Add system information as device randomness
*/
projects / mirror_ubuntu-jammy-kernel.git / commitdiff