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https://git.proxmox.com/git/mirror_ubuntu-kernels.git
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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
...
71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Kernel interface for the s390 arch_random_* functions
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*
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* Copyright IBM Corp. 2017
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*
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* Author: Harald Freudenberger <freude@de.ibm.com>
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*
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*/
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#ifndef _ASM_S390_ARCHRANDOM_H
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#define _ASM_S390_ARCHRANDOM_H
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#ifdef CONFIG_ARCH_RANDOM
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#include <linux/static_key.h>
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#include <linux/atomic.h>
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#include <asm/cpacf.h>
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DECLARE_STATIC_KEY_FALSE(s390_arch_random_available);
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extern atomic64_t s390_arch_random_counter;
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static void s390_arch_random_generate(u8 *buf, unsigned int nbytes)
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{
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cpacf_trng(NULL, 0, buf, nbytes);
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atomic64_add(nbytes, &s390_arch_random_counter);
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}
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static inline bool arch_has_random(void)
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{
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return false;
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}
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static inline bool arch_has_random_seed(void)
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{
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if (static_branch_likely(&s390_arch_random_available))
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return true;
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return false;
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}
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static inline bool arch_get_random_long(unsigned long *v)
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{
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return false;
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}
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static inline bool arch_get_random_int(unsigned int *v)
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{
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return false;
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}
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static inline bool arch_get_random_seed_long(unsigned long *v)
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{
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if (static_branch_likely(&s390_arch_random_available)) {
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s390_arch_random_generate((u8 *)v, sizeof(*v));
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return true;
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}
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return false;
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}
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static inline bool arch_get_random_seed_int(unsigned int *v)
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{
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if (static_branch_likely(&s390_arch_random_available)) {
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s390_arch_random_generate((u8 *)v, sizeof(*v));
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return true;
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}
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return false;
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}
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#endif /* CONFIG_ARCH_RANDOM */
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#endif /* _ASM_S390_ARCHRANDOM_H */
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