Revision 2d63ba3e41db3ceb0d23924ed2879b910276e24c authored by Linus Torvalds on 16 August 2019, 16:13:16 UTC, committed by Linus Torvalds on 16 August 2019, 16:13:16 UTC
Pull power management fixes from Rafael Wysocki:
"These add a check to avoid recent suspend-to-idle power regression on
systems with NVMe drives where the PCIe ASPM policy is "performance"
(or when the kernel is built without ASPM support), fix an issue
related to frequency limits in the schedutil cpufreq governor and fix
a mistake related to the PM QoS usage in the cpufreq core introduced
recently.
Specifics:
- Disable NVMe power optimization related to suspend-to-idle added
recently on systems where PCIe ASPM is not able to put PCIe links
into low-power states to prevent excess power from being drawn by
the system while suspended (Rafael Wysocki).
- Make the schedutil governor handle frequency limits changes
properly in all cases (Viresh Kumar).
- Prevent the cpufreq core from treating positive values returned by
dev_pm_qos_update_request() as errors (Viresh Kumar)"
* tag 'pm-5.3-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
nvme-pci: Allow PCI bus-level PM to be used if ASPM is disabled
PCI/ASPM: Add pcie_aspm_enabled()
cpufreq: schedutil: Don't skip freq update when limits change
cpufreq: dev_pm_qos_update_request() can return 1 on success
rmd256.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Cryptographic API.
*
* RIPEMD-256 - RACE Integrity Primitives Evaluation Message Digest.
*
* Based on the reference implementation by Antoon Bosselaers, ESAT-COSIC
*
* Copyright (c) 2008 Adrian-Ken Rueegsegger <ken@codelabs.ch>
*/
#include <crypto/internal/hash.h>
#include <linux/init.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/types.h>
#include <asm/byteorder.h>
#include "ripemd.h"
struct rmd256_ctx {
u64 byte_count;
u32 state[8];
__le32 buffer[16];
};
#define K1 RMD_K1
#define K2 RMD_K2
#define K3 RMD_K3
#define K4 RMD_K4
#define KK1 RMD_K6
#define KK2 RMD_K7
#define KK3 RMD_K8
#define KK4 RMD_K1
#define F1(x, y, z) (x ^ y ^ z) /* XOR */
#define F2(x, y, z) (z ^ (x & (y ^ z))) /* x ? y : z */
#define F3(x, y, z) ((x | ~y) ^ z)
#define F4(x, y, z) (y ^ (z & (x ^ y))) /* z ? x : y */
#define ROUND(a, b, c, d, f, k, x, s) { \
(a) += f((b), (c), (d)) + le32_to_cpup(&(x)) + (k); \
(a) = rol32((a), (s)); \
}
static void rmd256_transform(u32 *state, const __le32 *in)
{
u32 aa, bb, cc, dd, aaa, bbb, ccc, ddd;
/* Initialize left lane */
aa = state[0];
bb = state[1];
cc = state[2];
dd = state[3];
/* Initialize right lane */
aaa = state[4];
bbb = state[5];
ccc = state[6];
ddd = state[7];
/* round 1: left lane */
ROUND(aa, bb, cc, dd, F1, K1, in[0], 11);
ROUND(dd, aa, bb, cc, F1, K1, in[1], 14);
ROUND(cc, dd, aa, bb, F1, K1, in[2], 15);
ROUND(bb, cc, dd, aa, F1, K1, in[3], 12);
ROUND(aa, bb, cc, dd, F1, K1, in[4], 5);
ROUND(dd, aa, bb, cc, F1, K1, in[5], 8);
ROUND(cc, dd, aa, bb, F1, K1, in[6], 7);
ROUND(bb, cc, dd, aa, F1, K1, in[7], 9);
ROUND(aa, bb, cc, dd, F1, K1, in[8], 11);
ROUND(dd, aa, bb, cc, F1, K1, in[9], 13);
ROUND(cc, dd, aa, bb, F1, K1, in[10], 14);
ROUND(bb, cc, dd, aa, F1, K1, in[11], 15);
ROUND(aa, bb, cc, dd, F1, K1, in[12], 6);
ROUND(dd, aa, bb, cc, F1, K1, in[13], 7);
ROUND(cc, dd, aa, bb, F1, K1, in[14], 9);
ROUND(bb, cc, dd, aa, F1, K1, in[15], 8);
/* round 1: right lane */
ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[5], 8);
ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[14], 9);
ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[7], 9);
ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[0], 11);
ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[9], 13);
ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[2], 15);
ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[11], 15);
ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[4], 5);
ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[13], 7);
ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[6], 7);
ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[15], 8);
ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[8], 11);
ROUND(aaa, bbb, ccc, ddd, F4, KK1, in[1], 14);
ROUND(ddd, aaa, bbb, ccc, F4, KK1, in[10], 14);
ROUND(ccc, ddd, aaa, bbb, F4, KK1, in[3], 12);
ROUND(bbb, ccc, ddd, aaa, F4, KK1, in[12], 6);
/* Swap contents of "a" registers */
swap(aa, aaa);
/* round 2: left lane */
ROUND(aa, bb, cc, dd, F2, K2, in[7], 7);
ROUND(dd, aa, bb, cc, F2, K2, in[4], 6);
ROUND(cc, dd, aa, bb, F2, K2, in[13], 8);
ROUND(bb, cc, dd, aa, F2, K2, in[1], 13);
ROUND(aa, bb, cc, dd, F2, K2, in[10], 11);
ROUND(dd, aa, bb, cc, F2, K2, in[6], 9);
ROUND(cc, dd, aa, bb, F2, K2, in[15], 7);
ROUND(bb, cc, dd, aa, F2, K2, in[3], 15);
ROUND(aa, bb, cc, dd, F2, K2, in[12], 7);
ROUND(dd, aa, bb, cc, F2, K2, in[0], 12);
ROUND(cc, dd, aa, bb, F2, K2, in[9], 15);
ROUND(bb, cc, dd, aa, F2, K2, in[5], 9);
ROUND(aa, bb, cc, dd, F2, K2, in[2], 11);
ROUND(dd, aa, bb, cc, F2, K2, in[14], 7);
ROUND(cc, dd, aa, bb, F2, K2, in[11], 13);
ROUND(bb, cc, dd, aa, F2, K2, in[8], 12);
/* round 2: right lane */
ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[6], 9);
ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[11], 13);
ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[3], 15);
ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[7], 7);
ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[0], 12);
ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[13], 8);
ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[5], 9);
ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[10], 11);
ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[14], 7);
ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[15], 7);
ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[8], 12);
ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[12], 7);
ROUND(aaa, bbb, ccc, ddd, F3, KK2, in[4], 6);
ROUND(ddd, aaa, bbb, ccc, F3, KK2, in[9], 15);
ROUND(ccc, ddd, aaa, bbb, F3, KK2, in[1], 13);
ROUND(bbb, ccc, ddd, aaa, F3, KK2, in[2], 11);
/* Swap contents of "b" registers */
swap(bb, bbb);
/* round 3: left lane */
ROUND(aa, bb, cc, dd, F3, K3, in[3], 11);
ROUND(dd, aa, bb, cc, F3, K3, in[10], 13);
ROUND(cc, dd, aa, bb, F3, K3, in[14], 6);
ROUND(bb, cc, dd, aa, F3, K3, in[4], 7);
ROUND(aa, bb, cc, dd, F3, K3, in[9], 14);
ROUND(dd, aa, bb, cc, F3, K3, in[15], 9);
ROUND(cc, dd, aa, bb, F3, K3, in[8], 13);
ROUND(bb, cc, dd, aa, F3, K3, in[1], 15);
ROUND(aa, bb, cc, dd, F3, K3, in[2], 14);
ROUND(dd, aa, bb, cc, F3, K3, in[7], 8);
ROUND(cc, dd, aa, bb, F3, K3, in[0], 13);
ROUND(bb, cc, dd, aa, F3, K3, in[6], 6);
ROUND(aa, bb, cc, dd, F3, K3, in[13], 5);
ROUND(dd, aa, bb, cc, F3, K3, in[11], 12);
ROUND(cc, dd, aa, bb, F3, K3, in[5], 7);
ROUND(bb, cc, dd, aa, F3, K3, in[12], 5);
/* round 3: right lane */
ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[15], 9);
ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[5], 7);
ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[1], 15);
ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[3], 11);
ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[7], 8);
ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[14], 6);
ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[6], 6);
ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[9], 14);
ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[11], 12);
ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[8], 13);
ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[12], 5);
ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[2], 14);
ROUND(aaa, bbb, ccc, ddd, F2, KK3, in[10], 13);
ROUND(ddd, aaa, bbb, ccc, F2, KK3, in[0], 13);
ROUND(ccc, ddd, aaa, bbb, F2, KK3, in[4], 7);
ROUND(bbb, ccc, ddd, aaa, F2, KK3, in[13], 5);
/* Swap contents of "c" registers */
swap(cc, ccc);
/* round 4: left lane */
ROUND(aa, bb, cc, dd, F4, K4, in[1], 11);
ROUND(dd, aa, bb, cc, F4, K4, in[9], 12);
ROUND(cc, dd, aa, bb, F4, K4, in[11], 14);
ROUND(bb, cc, dd, aa, F4, K4, in[10], 15);
ROUND(aa, bb, cc, dd, F4, K4, in[0], 14);
ROUND(dd, aa, bb, cc, F4, K4, in[8], 15);
ROUND(cc, dd, aa, bb, F4, K4, in[12], 9);
ROUND(bb, cc, dd, aa, F4, K4, in[4], 8);
ROUND(aa, bb, cc, dd, F4, K4, in[13], 9);
ROUND(dd, aa, bb, cc, F4, K4, in[3], 14);
ROUND(cc, dd, aa, bb, F4, K4, in[7], 5);
ROUND(bb, cc, dd, aa, F4, K4, in[15], 6);
ROUND(aa, bb, cc, dd, F4, K4, in[14], 8);
ROUND(dd, aa, bb, cc, F4, K4, in[5], 6);
ROUND(cc, dd, aa, bb, F4, K4, in[6], 5);
ROUND(bb, cc, dd, aa, F4, K4, in[2], 12);
/* round 4: right lane */
ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[8], 15);
ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[6], 5);
ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[4], 8);
ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[1], 11);
ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[3], 14);
ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[11], 14);
ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[15], 6);
ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[0], 14);
ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[5], 6);
ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[12], 9);
ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[2], 12);
ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[13], 9);
ROUND(aaa, bbb, ccc, ddd, F1, KK4, in[9], 12);
ROUND(ddd, aaa, bbb, ccc, F1, KK4, in[7], 5);
ROUND(ccc, ddd, aaa, bbb, F1, KK4, in[10], 15);
ROUND(bbb, ccc, ddd, aaa, F1, KK4, in[14], 8);
/* Swap contents of "d" registers */
swap(dd, ddd);
/* combine results */
state[0] += aa;
state[1] += bb;
state[2] += cc;
state[3] += dd;
state[4] += aaa;
state[5] += bbb;
state[6] += ccc;
state[7] += ddd;
}
static int rmd256_init(struct shash_desc *desc)
{
struct rmd256_ctx *rctx = shash_desc_ctx(desc);
rctx->byte_count = 0;
rctx->state[0] = RMD_H0;
rctx->state[1] = RMD_H1;
rctx->state[2] = RMD_H2;
rctx->state[3] = RMD_H3;
rctx->state[4] = RMD_H5;
rctx->state[5] = RMD_H6;
rctx->state[6] = RMD_H7;
rctx->state[7] = RMD_H8;
memset(rctx->buffer, 0, sizeof(rctx->buffer));
return 0;
}
static int rmd256_update(struct shash_desc *desc, const u8 *data,
unsigned int len)
{
struct rmd256_ctx *rctx = shash_desc_ctx(desc);
const u32 avail = sizeof(rctx->buffer) - (rctx->byte_count & 0x3f);
rctx->byte_count += len;
/* Enough space in buffer? If so copy and we're done */
if (avail > len) {
memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
data, len);
goto out;
}
memcpy((char *)rctx->buffer + (sizeof(rctx->buffer) - avail),
data, avail);
rmd256_transform(rctx->state, rctx->buffer);
data += avail;
len -= avail;
while (len >= sizeof(rctx->buffer)) {
memcpy(rctx->buffer, data, sizeof(rctx->buffer));
rmd256_transform(rctx->state, rctx->buffer);
data += sizeof(rctx->buffer);
len -= sizeof(rctx->buffer);
}
memcpy(rctx->buffer, data, len);
out:
return 0;
}
/* Add padding and return the message digest. */
static int rmd256_final(struct shash_desc *desc, u8 *out)
{
struct rmd256_ctx *rctx = shash_desc_ctx(desc);
u32 i, index, padlen;
__le64 bits;
__le32 *dst = (__le32 *)out;
static const u8 padding[64] = { 0x80, };
bits = cpu_to_le64(rctx->byte_count << 3);
/* Pad out to 56 mod 64 */
index = rctx->byte_count & 0x3f;
padlen = (index < 56) ? (56 - index) : ((64+56) - index);
rmd256_update(desc, padding, padlen);
/* Append length */
rmd256_update(desc, (const u8 *)&bits, sizeof(bits));
/* Store state in digest */
for (i = 0; i < 8; i++)
dst[i] = cpu_to_le32p(&rctx->state[i]);
/* Wipe context */
memset(rctx, 0, sizeof(*rctx));
return 0;
}
static struct shash_alg alg = {
.digestsize = RMD256_DIGEST_SIZE,
.init = rmd256_init,
.update = rmd256_update,
.final = rmd256_final,
.descsize = sizeof(struct rmd256_ctx),
.base = {
.cra_name = "rmd256",
.cra_driver_name = "rmd256-generic",
.cra_blocksize = RMD256_BLOCK_SIZE,
.cra_module = THIS_MODULE,
}
};
static int __init rmd256_mod_init(void)
{
return crypto_register_shash(&alg);
}
static void __exit rmd256_mod_fini(void)
{
crypto_unregister_shash(&alg);
}
subsys_initcall(rmd256_mod_init);
module_exit(rmd256_mod_fini);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Adrian-Ken Rueegsegger <ken@codelabs.ch>");
MODULE_DESCRIPTION("RIPEMD-256 Message Digest");
MODULE_ALIAS_CRYPTO("rmd256");
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