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847d4287a0
- Remove address space overrides using set_fs(). - Convert to generic vDSO. - Convert to generic page table dumper. - Add ARCH_HAS_DEBUG_WX support. - Add leap seconds handling support. - Add NVMe firmware-assisted kernel dump support. - Extend NVMe boot support with memory clearing control and addition of kernel parameters. - AP bus and zcrypt api code rework. Add adapter configure/deconfigure interface. Extend debug features. Add failure injection support. - Add ECC secure private keys support. - Add KASan support for running protected virtualization host with 4-level paging. - Utilize destroy page ultravisor call to speed up secure guests shutdown. - Implement ioremap_wc() and ioremap_prot() with MIO in PCI code. - Various checksum improvements. - Other small various fixes and improvements all over the code. -----BEGIN PGP SIGNATURE----- iQEzBAABCAAdFiEE3QHqV+H2a8xAv27vjYWKoQLXFBgFAl+JXIIACgkQjYWKoQLX FBgIWAf9FKpnIsy/aNI2RpvojfySEhgH3T5zxGDTjghCSUQzAu0hIBPKhQOs/YfV /apflXxNPneq7FsQPPpNqfdz2DXQrtgDfecK+7GyEVoOawFArgxiwP+tDVy4dmPT 30PNfr+BpGs7GjKuj33fC0c5U33HYvKzUGJn/GQB2Fhw+5tTDxxCubuS1GVR9iuw /U1cQhG4KN0lwEeF2gO7BWWgqTH9C1t60+WzOQhIAbdvgtBRr1ctGu//F5S94BYL NBw5Wxb9vUHrMm2mL0n8bi16hSn2MWHmAMQLkxPXI2osBYun3soaHUWFSA3ryFMw 4BGU+g7T66Pv3ZmLP4jH5UGrn8HWmg== =4zdC -----END PGP SIGNATURE----- Merge tag 's390-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux Pull s390 updates from Vasily Gorbik: - Remove address space overrides using set_fs() - Convert to generic vDSO - Convert to generic page table dumper - Add ARCH_HAS_DEBUG_WX support - Add leap seconds handling support - Add NVMe firmware-assisted kernel dump support - Extend NVMe boot support with memory clearing control and addition of kernel parameters - AP bus and zcrypt api code rework. Add adapter configure/deconfigure interface. Extend debug features. Add failure injection support - Add ECC secure private keys support - Add KASan support for running protected virtualization host with 4-level paging - Utilize destroy page ultravisor call to speed up secure guests shutdown - Implement ioremap_wc() and ioremap_prot() with MIO in PCI code - Various checksum improvements - Other small various fixes and improvements all over the code * tag 's390-5.10-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux: (85 commits) s390/uaccess: fix indentation s390/uaccess: add default cases for __put_user_fn()/__get_user_fn() s390/zcrypt: fix wrong format specifications s390/kprobes: move insn_page to text segment s390/sie: fix typo in SIGP code description s390/lib: fix kernel doc for memcmp() s390/zcrypt: Introduce Failure Injection feature s390/zcrypt: move ap_msg param one level up the call chain s390/ap/zcrypt: revisit ap and zcrypt error handling s390/ap: Support AP card SCLP config and deconfig operations s390/sclp: Add support for SCLP AP adapter config/deconfig s390/ap: add card/queue deconfig state s390/ap: add error response code field for ap queue devices s390/ap: split ap queue state machine state from device state s390/zcrypt: New config switch CONFIG_ZCRYPT_DEBUG s390/zcrypt: introduce msg tracking in zcrypt functions s390/startup: correct early pgm check info formatting s390: remove orphaned extern variables declarations s390/kasan: make sure int handler always run with DAT on s390/ipl: add support to control memory clearing for nvme re-IPL ...
131 lines
3.3 KiB
C
131 lines
3.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* S390 fast network checksum routines
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*
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* S390 version
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* Copyright IBM Corp. 1999
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* Author(s): Ulrich Hild (first version)
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* Martin Schwidefsky (heavily optimized CKSM version)
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* D.J. Barrow (third attempt)
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*/
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#ifndef _S390_CHECKSUM_H
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#define _S390_CHECKSUM_H
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#include <linux/uaccess.h>
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#include <linux/in6.h>
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/*
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* Computes the checksum of a memory block at buff, length len,
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* and adds in "sum" (32-bit).
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*
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* Returns a 32-bit number suitable for feeding into itself
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* or csum_tcpudp_magic.
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*
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* This function must be called with even lengths, except
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* for the last fragment, which may be odd.
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*
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* It's best to have buff aligned on a 32-bit boundary.
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*/
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static inline __wsum csum_partial(const void *buff, int len, __wsum sum)
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{
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register unsigned long reg2 asm("2") = (unsigned long) buff;
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register unsigned long reg3 asm("3") = (unsigned long) len;
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asm volatile(
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"0: cksm %0,%1\n" /* do checksum on longs */
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" jo 0b\n"
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: "+d" (sum), "+d" (reg2), "+d" (reg3) : : "cc", "memory");
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return sum;
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}
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/*
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* Fold a partial checksum without adding pseudo headers.
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*/
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static inline __sum16 csum_fold(__wsum sum)
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{
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u32 csum = (__force u32) sum;
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csum += (csum >> 16) | (csum << 16);
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csum >>= 16;
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return (__force __sum16) ~csum;
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}
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/*
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* This is a version of ip_compute_csum() optimized for IP headers,
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* which always checksums on 4 octet boundaries.
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*/
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static inline __sum16 ip_fast_csum(const void *iph, unsigned int ihl)
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{
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__u64 csum = 0;
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__u32 *ptr = (u32 *)iph;
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csum += *ptr++;
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csum += *ptr++;
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csum += *ptr++;
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csum += *ptr++;
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ihl -= 4;
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while (ihl--)
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csum += *ptr++;
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csum += (csum >> 32) | (csum << 32);
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return csum_fold((__force __wsum)(csum >> 32));
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}
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/*
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* Computes the checksum of the TCP/UDP pseudo-header.
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* Returns a 32-bit checksum.
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*/
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static inline __wsum csum_tcpudp_nofold(__be32 saddr, __be32 daddr, __u32 len,
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__u8 proto, __wsum sum)
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{
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__u64 csum = (__force __u64)sum;
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csum += (__force __u32)saddr;
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csum += (__force __u32)daddr;
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csum += len;
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csum += proto;
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csum += (csum >> 32) | (csum << 32);
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return (__force __wsum)(csum >> 32);
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}
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/*
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* Computes the checksum of the TCP/UDP pseudo-header.
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* Returns a 16-bit checksum, already complemented.
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*/
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static inline __sum16 csum_tcpudp_magic(__be32 saddr, __be32 daddr, __u32 len,
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__u8 proto, __wsum sum)
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{
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return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));
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}
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/*
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* Used for miscellaneous IP-like checksums, mainly icmp.
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*/
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static inline __sum16 ip_compute_csum(const void *buff, int len)
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{
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return csum_fold(csum_partial(buff, len, 0));
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}
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#define _HAVE_ARCH_IPV6_CSUM
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static inline __sum16 csum_ipv6_magic(const struct in6_addr *saddr,
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const struct in6_addr *daddr,
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__u32 len, __u8 proto, __wsum csum)
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{
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__u64 sum = (__force __u64)csum;
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sum += (__force __u32)saddr->s6_addr32[0];
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sum += (__force __u32)saddr->s6_addr32[1];
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sum += (__force __u32)saddr->s6_addr32[2];
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sum += (__force __u32)saddr->s6_addr32[3];
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sum += (__force __u32)daddr->s6_addr32[0];
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sum += (__force __u32)daddr->s6_addr32[1];
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sum += (__force __u32)daddr->s6_addr32[2];
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sum += (__force __u32)daddr->s6_addr32[3];
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sum += len;
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sum += proto;
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sum += (sum >> 32) | (sum << 32);
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return csum_fold((__force __wsum)(sum >> 32));
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}
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#endif /* _S390_CHECKSUM_H */
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