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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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916cda1aa1
This adds a new system call to enable the use of guarded storage for
user space processes. The system call takes two arguments, a command
and pointer to a guarded storage control block:
s390_guarded_storage(int command, struct gs_cb *gs_cb);
The second argument is relevant only for the GS_SET_BC_CB command.
The commands in detail:
0 - GS_ENABLE
Enable the guarded storage facility for the current task. The
initial content of the guarded storage control block will be
all zeros. After the enablement the user space code can use
load-guarded-storage-controls instruction (LGSC) to load an
arbitrary control block. While a task is enabled the kernel
will save and restore the current content of the guarded
storage registers on context switch.
1 - GS_DISABLE
Disables the use of the guarded storage facility for the current
task. The kernel will cease to save and restore the content of
the guarded storage registers, the task specific content of
these registers is lost.
2 - GS_SET_BC_CB
Set a broadcast guarded storage control block. This is called
per thread and stores a specific guarded storage control block
in the task struct of the current task. This control block will
be used for the broadcast event GS_BROADCAST.
3 - GS_CLEAR_BC_CB
Clears the broadcast guarded storage control block. The guarded-
storage control block is removed from the task struct that was
established by GS_SET_BC_CB.
4 - GS_BROADCAST
Sends a broadcast to all thread siblings of the current task.
Every sibling that has established a broadcast guarded storage
control block will load this control block and will be enabled
for guarded storage. The broadcast guarded storage control block
is used up, a second broadcast without a refresh of the stored
control block with GS_SET_BC_CB will not have any effect.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
245 lines
9.3 KiB
C
245 lines
9.3 KiB
C
/*
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* S390 version
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*
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* Derived from "include/asm-i386/elf.h"
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*/
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#ifndef __ASMS390_ELF_H
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#define __ASMS390_ELF_H
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/* s390 relocations defined by the ABIs */
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#define R_390_NONE 0 /* No reloc. */
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#define R_390_8 1 /* Direct 8 bit. */
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#define R_390_12 2 /* Direct 12 bit. */
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#define R_390_16 3 /* Direct 16 bit. */
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#define R_390_32 4 /* Direct 32 bit. */
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#define R_390_PC32 5 /* PC relative 32 bit. */
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#define R_390_GOT12 6 /* 12 bit GOT offset. */
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#define R_390_GOT32 7 /* 32 bit GOT offset. */
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#define R_390_PLT32 8 /* 32 bit PC relative PLT address. */
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#define R_390_COPY 9 /* Copy symbol at runtime. */
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#define R_390_GLOB_DAT 10 /* Create GOT entry. */
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#define R_390_JMP_SLOT 11 /* Create PLT entry. */
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#define R_390_RELATIVE 12 /* Adjust by program base. */
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#define R_390_GOTOFF32 13 /* 32 bit offset to GOT. */
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#define R_390_GOTPC 14 /* 32 bit PC rel. offset to GOT. */
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#define R_390_GOT16 15 /* 16 bit GOT offset. */
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#define R_390_PC16 16 /* PC relative 16 bit. */
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#define R_390_PC16DBL 17 /* PC relative 16 bit shifted by 1. */
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#define R_390_PLT16DBL 18 /* 16 bit PC rel. PLT shifted by 1. */
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#define R_390_PC32DBL 19 /* PC relative 32 bit shifted by 1. */
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#define R_390_PLT32DBL 20 /* 32 bit PC rel. PLT shifted by 1. */
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#define R_390_GOTPCDBL 21 /* 32 bit PC rel. GOT shifted by 1. */
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#define R_390_64 22 /* Direct 64 bit. */
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#define R_390_PC64 23 /* PC relative 64 bit. */
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#define R_390_GOT64 24 /* 64 bit GOT offset. */
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#define R_390_PLT64 25 /* 64 bit PC relative PLT address. */
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#define R_390_GOTENT 26 /* 32 bit PC rel. to GOT entry >> 1. */
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#define R_390_GOTOFF16 27 /* 16 bit offset to GOT. */
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#define R_390_GOTOFF64 28 /* 64 bit offset to GOT. */
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#define R_390_GOTPLT12 29 /* 12 bit offset to jump slot. */
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#define R_390_GOTPLT16 30 /* 16 bit offset to jump slot. */
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#define R_390_GOTPLT32 31 /* 32 bit offset to jump slot. */
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#define R_390_GOTPLT64 32 /* 64 bit offset to jump slot. */
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#define R_390_GOTPLTENT 33 /* 32 bit rel. offset to jump slot. */
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#define R_390_PLTOFF16 34 /* 16 bit offset from GOT to PLT. */
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#define R_390_PLTOFF32 35 /* 32 bit offset from GOT to PLT. */
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#define R_390_PLTOFF64 36 /* 16 bit offset from GOT to PLT. */
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#define R_390_TLS_LOAD 37 /* Tag for load insn in TLS code. */
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#define R_390_TLS_GDCALL 38 /* Tag for function call in general
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dynamic TLS code. */
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#define R_390_TLS_LDCALL 39 /* Tag for function call in local
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dynamic TLS code. */
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#define R_390_TLS_GD32 40 /* Direct 32 bit for general dynamic
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thread local data. */
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#define R_390_TLS_GD64 41 /* Direct 64 bit for general dynamic
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thread local data. */
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#define R_390_TLS_GOTIE12 42 /* 12 bit GOT offset for static TLS
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block offset. */
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#define R_390_TLS_GOTIE32 43 /* 32 bit GOT offset for static TLS
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block offset. */
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#define R_390_TLS_GOTIE64 44 /* 64 bit GOT offset for static TLS
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block offset. */
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#define R_390_TLS_LDM32 45 /* Direct 32 bit for local dynamic
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thread local data in LD code. */
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#define R_390_TLS_LDM64 46 /* Direct 64 bit for local dynamic
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thread local data in LD code. */
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#define R_390_TLS_IE32 47 /* 32 bit address of GOT entry for
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negated static TLS block offset. */
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#define R_390_TLS_IE64 48 /* 64 bit address of GOT entry for
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negated static TLS block offset. */
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#define R_390_TLS_IEENT 49 /* 32 bit rel. offset to GOT entry for
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negated static TLS block offset. */
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#define R_390_TLS_LE32 50 /* 32 bit negated offset relative to
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static TLS block. */
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#define R_390_TLS_LE64 51 /* 64 bit negated offset relative to
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static TLS block. */
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#define R_390_TLS_LDO32 52 /* 32 bit offset relative to TLS
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block. */
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#define R_390_TLS_LDO64 53 /* 64 bit offset relative to TLS
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block. */
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#define R_390_TLS_DTPMOD 54 /* ID of module containing symbol. */
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#define R_390_TLS_DTPOFF 55 /* Offset in TLS block. */
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#define R_390_TLS_TPOFF 56 /* Negate offset in static TLS
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block. */
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#define R_390_20 57 /* Direct 20 bit. */
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#define R_390_GOT20 58 /* 20 bit GOT offset. */
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#define R_390_GOTPLT20 59 /* 20 bit offset to jump slot. */
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#define R_390_TLS_GOTIE20 60 /* 20 bit GOT offset for static TLS
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block offset. */
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/* Keep this the last entry. */
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#define R_390_NUM 61
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/* Bits present in AT_HWCAP. */
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#define HWCAP_S390_ESAN3 1
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#define HWCAP_S390_ZARCH 2
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#define HWCAP_S390_STFLE 4
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#define HWCAP_S390_MSA 8
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#define HWCAP_S390_LDISP 16
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#define HWCAP_S390_EIMM 32
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#define HWCAP_S390_DFP 64
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#define HWCAP_S390_HPAGE 128
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#define HWCAP_S390_ETF3EH 256
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#define HWCAP_S390_HIGH_GPRS 512
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#define HWCAP_S390_TE 1024
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#define HWCAP_S390_VXRS 2048
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#define HWCAP_S390_VXRS_BCD 4096
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#define HWCAP_S390_VXRS_EXT 8192
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#define HWCAP_S390_GS 16384
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/* Internal bits, not exposed via elf */
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#define HWCAP_INT_SIE 1UL
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/*
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* These are used to set parameters in the core dumps.
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*/
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#define ELF_CLASS ELFCLASS64
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#define ELF_DATA ELFDATA2MSB
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#define ELF_ARCH EM_S390
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/*
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* ELF register definitions..
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*/
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#include <asm/ptrace.h>
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#include <asm/compat.h>
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#include <asm/syscall.h>
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#include <asm/user.h>
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typedef s390_fp_regs elf_fpregset_t;
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typedef s390_regs elf_gregset_t;
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typedef s390_fp_regs compat_elf_fpregset_t;
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typedef s390_compat_regs compat_elf_gregset_t;
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#include <linux/compat.h>
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#include <linux/sched/mm.h> /* for task_struct */
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#include <asm/mmu_context.h>
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#include <asm/vdso.h>
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extern unsigned int vdso_enabled;
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/*
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* This is used to ensure we don't load something for the wrong architecture.
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*/
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#define elf_check_arch(x) \
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(((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
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&& (x)->e_ident[EI_CLASS] == ELF_CLASS)
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#define compat_elf_check_arch(x) \
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(((x)->e_machine == EM_S390 || (x)->e_machine == EM_S390_OLD) \
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&& (x)->e_ident[EI_CLASS] == ELF_CLASS)
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#define compat_start_thread start_thread31
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/* For SVR4/S390 the function pointer to be registered with `atexit` is
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passed in R14. */
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#define ELF_PLAT_INIT(_r, load_addr) \
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do { \
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_r->gprs[14] = 0; \
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} while (0)
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#define CORE_DUMP_USE_REGSET
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#define ELF_EXEC_PAGESIZE 4096
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/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
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use of this is to invoke "./ld.so someprog" to test out a new version of
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the loader. We need to make sure that it is out of the way of the program
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that it will "exec", and that there is sufficient room for the brk. 64-bit
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tasks are aligned to 4GB. */
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#define ELF_ET_DYN_BASE (is_compat_task() ? \
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(STACK_TOP / 3 * 2) : \
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(STACK_TOP / 3 * 2) & ~((1UL << 32) - 1))
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/* This yields a mask that user programs can use to figure out what
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instruction set this CPU supports. */
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extern unsigned long elf_hwcap;
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#define ELF_HWCAP (elf_hwcap)
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/* Internal hardware capabilities, not exposed via elf */
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extern unsigned long int_hwcap;
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/* This yields a string that ld.so will use to load implementation
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specific libraries for optimization. This is more specific in
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intent than poking at uname or /proc/cpuinfo.
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For the moment, we have only optimizations for the Intel generations,
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but that could change... */
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#define ELF_PLATFORM_SIZE 8
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extern char elf_platform[];
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#define ELF_PLATFORM (elf_platform)
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#ifndef CONFIG_COMPAT
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#define SET_PERSONALITY(ex) \
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do { \
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set_personality(PER_LINUX | \
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(current->personality & (~PER_MASK))); \
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current->thread.sys_call_table = \
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(unsigned long) &sys_call_table; \
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} while (0)
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#else /* CONFIG_COMPAT */
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#define SET_PERSONALITY(ex) \
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do { \
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if (personality(current->personality) != PER_LINUX32) \
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set_personality(PER_LINUX | \
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(current->personality & ~PER_MASK)); \
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if ((ex).e_ident[EI_CLASS] == ELFCLASS32) { \
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set_thread_flag(TIF_31BIT); \
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current->thread.sys_call_table = \
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(unsigned long) &sys_call_table_emu; \
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} else { \
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clear_thread_flag(TIF_31BIT); \
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current->thread.sys_call_table = \
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(unsigned long) &sys_call_table; \
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} \
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} while (0)
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#endif /* CONFIG_COMPAT */
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/*
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* Cache aliasing on the latest machines calls for a mapping granularity
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* of 512KB. For 64-bit processes use a 512KB alignment and a randomization
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* of up to 1GB. For 31-bit processes the virtual address space is limited,
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* use no alignment and limit the randomization to 8MB.
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*/
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#define BRK_RND_MASK (is_compat_task() ? 0x7ffUL : 0x3ffffUL)
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#define MMAP_RND_MASK (is_compat_task() ? 0x7ffUL : 0x3ff80UL)
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#define MMAP_ALIGN_MASK (is_compat_task() ? 0 : 0x7fUL)
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#define STACK_RND_MASK MMAP_RND_MASK
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/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
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#define ARCH_DLINFO \
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do { \
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if (vdso_enabled) \
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NEW_AUX_ENT(AT_SYSINFO_EHDR, \
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(unsigned long)current->mm->context.vdso_base); \
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} while (0)
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struct linux_binprm;
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#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
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int arch_setup_additional_pages(struct linux_binprm *, int);
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#endif
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