mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-17 16:36:52 +07:00
d60a540ac5
Pull s390 updates from Heiko Carstens:
"Since Martin is on vacation you get the s390 pull request for the
v4.15 merge window this time from me.
Besides a lot of cleanups and bug fixes these are the most important
changes:
- a new regset for runtime instrumentation registers
- hardware accelerated AES-GCM support for the aes_s390 module
- support for the new CEX6S crypto cards
- support for FORTIFY_SOURCE
- addition of missing z13 and new z14 instructions to the in-kernel
disassembler
- generate opcode tables for the in-kernel disassembler out of a
simple text file instead of having to manually maintain those
tables
- fast memset16, memset32 and memset64 implementations
- removal of named saved segment support
- hardware counter support for z14
- queued spinlocks and queued rwlocks implementations for s390
- use the stack_depth tracking feature for s390 BPF JIT
- a new s390_sthyi system call which emulates the sthyi (store
hypervisor information) instruction
- removal of the old KVM virtio transport
- an s390 specific CPU alternatives implementation which is used in
the new spinlock code"
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (88 commits)
MAINTAINERS: add virtio-ccw.h to virtio/s390 section
s390/noexec: execute kexec datamover without DAT
s390: fix transactional execution control register handling
s390/bpf: take advantage of stack_depth tracking
s390: simplify transactional execution elf hwcap handling
s390/zcrypt: Rework struct ap_qact_ap_info.
s390/virtio: remove unused header file kvm_virtio.h
s390: avoid undefined behaviour
s390/disassembler: generate opcode tables from text file
s390/disassembler: remove insn_to_mnemonic()
s390/dasd: avoid calling do_gettimeofday()
s390: vfio-ccw: Do not attempt to free no-op, test and tic cda.
s390: remove named saved segment support
s390/archrandom: Reconsider s390 arch random implementation
s390/pci: do not require AIS facility
s390/qdio: sanitize put_indicator
s390/qdio: use atomic_cmpxchg
s390/nmi: avoid using long-displacement facility
s390: pass endianness info to sparse
s390/decompressor: remove informational messages
...
121 lines
3.0 KiB
ArmAsm
121 lines
3.0 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Copyright IBM Corp. 2005
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*
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* Author(s): Rolf Adelsberger,
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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*
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*/
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#include <linux/linkage.h>
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#include <asm/page.h>
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#include <asm/sigp.h>
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/*
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* moves the new kernel to its destination...
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* %r2 = pointer to first kimage_entry_t
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* %r3 = start address - where to jump to after the job is done...
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*
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* %r5 will be used as temp. storage
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* %r6 holds the destination address
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* %r7 = PAGE_SIZE
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* %r8 holds the source address
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* %r9 = PAGE_SIZE
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*
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* 0xf000 is a page_mask
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*/
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.text
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ENTRY(relocate_kernel)
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basr %r13,0 # base address
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.base:
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stctg %c0,%c15,ctlregs-.base(%r13)
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stmg %r0,%r15,gprregs-.base(%r13)
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lghi %r0,3
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sllg %r0,%r0,31
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stg %r0,0x1d0(%r0)
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la %r0,.back_pgm-.base(%r13)
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stg %r0,0x1d8(%r0)
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la %r1,load_psw-.base(%r13)
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mvc 0(8,%r0),0(%r1)
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la %r0,.back-.base(%r13)
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st %r0,4(%r0)
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oi 4(%r0),0x80
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lghi %r0,0
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diag %r0,%r0,0x308
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.back:
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lhi %r1,1 # mode 1 = esame
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sigp %r1,%r0,SIGP_SET_ARCHITECTURE # switch to esame mode
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sam64 # switch to 64 bit addressing mode
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basr %r13,0
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.back_base:
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oi have_diag308-.back_base(%r13),0x01
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lctlg %c0,%c15,ctlregs-.back_base(%r13)
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lmg %r0,%r15,gprregs-.back_base(%r13)
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j .top
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.back_pgm:
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lmg %r0,%r15,gprregs-.base(%r13)
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.top:
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lghi %r7,PAGE_SIZE # load PAGE_SIZE in r7
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lghi %r9,PAGE_SIZE # load PAGE_SIZE in r9
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lg %r5,0(%r2) # read another word for indirection page
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aghi %r2,8 # increment pointer
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tml %r5,0x1 # is it a destination page?
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je .indir_check # NO, goto "indir_check"
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lgr %r6,%r5 # r6 = r5
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nill %r6,0xf000 # mask it out and...
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j .top # ...next iteration
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.indir_check:
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tml %r5,0x2 # is it a indirection page?
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je .done_test # NO, goto "done_test"
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nill %r5,0xf000 # YES, mask out,
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lgr %r2,%r5 # move it into the right register,
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j .top # and read next...
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.done_test:
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tml %r5,0x4 # is it the done indicator?
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je .source_test # NO! Well, then it should be the source indicator...
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j .done # ok, lets finish it here...
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.source_test:
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tml %r5,0x8 # it should be a source indicator...
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je .top # NO, ignore it...
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lgr %r8,%r5 # r8 = r5
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nill %r8,0xf000 # masking
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0: mvcle %r6,%r8,0x0 # copy PAGE_SIZE bytes from r8 to r6 - pad with 0
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jo 0b
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j .top
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.done:
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sgr %r0,%r0 # clear register r0
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la %r4,load_psw-.base(%r13) # load psw-address into the register
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o %r3,4(%r4) # or load address into psw
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st %r3,4(%r4)
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mvc 0(8,%r0),0(%r4) # copy psw to absolute address 0
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tm have_diag308-.base(%r13),0x01
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jno .no_diag308
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diag %r0,%r0,0x308
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.no_diag308:
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sam31 # 31 bit mode
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sr %r1,%r1 # erase register r1
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sr %r2,%r2 # erase register r2
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sigp %r1,%r2,SIGP_SET_ARCHITECTURE # set cpuid to zero
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lpsw 0 # hopefully start new kernel...
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.align 8
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load_psw:
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.long 0x00080000,0x80000000
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ctlregs:
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.rept 16
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.quad 0
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.endr
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gprregs:
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.rept 16
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.quad 0
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.endr
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have_diag308:
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.byte 0
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.align 8
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relocate_kernel_end:
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.align 8
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.globl relocate_kernel_len
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relocate_kernel_len:
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.quad relocate_kernel_end - relocate_kernel
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