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Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel…
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…/git/s390/linux

Pull s390 updates from Martin Schwidefsky:
 "One additional new feature for 4.1, a new PRNG based on SHA-512 for
  the zcrypt driver.

  Two memory management related changes, the page table reallocation for
  KVM is removed, and with file ptes gone the encoding of page table
  entries is improved.

  And three bug fixes"

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/zcrypt: Introduce new SHA-512 based Pseudo Random Generator.
  s390/mm: change swap pte encoding and pgtable cleanup
  s390/mm: correct transfer of dirty & young bits in __pmd_to_pte
  s390/bpf: add dependency to z196 features
  s390/3215: free memory in error path
  s390/kvm: remove delayed reallocation of page tables for KVM
  kexec: allocate the kexec control page with KEXEC_CONTROL_MEMORY_GFP
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@torvalds
torvalds committed Apr 28, 2015
2 parents 2decb26 + 5712764 commit 14bc84c
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Showing 13 changed files with 1,039 additions and 329 deletions.
2 changes: 1 addition & 1 deletion arch/s390/Kconfig
View file
Original file line number Diff line number Diff line change
Expand Up @@ -115,7 +115,7 @@ config S390
select HAVE_ARCH_SECCOMP_FILTER
select HAVE_ARCH_TRACEHOOK
select HAVE_ARCH_TRANSPARENT_HUGEPAGE
select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z9_109_FEATURES
select HAVE_BPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES
select HAVE_CMPXCHG_DOUBLE
select HAVE_CMPXCHG_LOCAL
select HAVE_DEBUG_KMEMLEAK
Expand Down
122 changes: 91 additions & 31 deletions arch/s390/crypto/crypt_s390.h
View file
Original file line number Diff line number Diff line change
Expand Up @@ -3,9 +3,10 @@
*
* Support for s390 cryptographic instructions.
*
* Copyright IBM Corp. 2003, 2007
* Copyright IBM Corp. 2003, 2015
* Author(s): Thomas Spatzier
* Jan Glauber ([email protected])
* Harald Freudenberger ([email protected])
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
Expand All @@ -28,15 +29,17 @@
#define CRYPT_S390_MSA 0x1
#define CRYPT_S390_MSA3 0x2
#define CRYPT_S390_MSA4 0x4
#define CRYPT_S390_MSA5 0x8

/* s390 cryptographic operations */
enum crypt_s390_operations {
CRYPT_S390_KM = 0x0100,
CRYPT_S390_KMC = 0x0200,
CRYPT_S390_KIMD = 0x0300,
CRYPT_S390_KLMD = 0x0400,
CRYPT_S390_KMAC = 0x0500,
CRYPT_S390_KMCTR = 0x0600
CRYPT_S390_KM = 0x0100,
CRYPT_S390_KMC = 0x0200,
CRYPT_S390_KIMD = 0x0300,
CRYPT_S390_KLMD = 0x0400,
CRYPT_S390_KMAC = 0x0500,
CRYPT_S390_KMCTR = 0x0600,
CRYPT_S390_PPNO = 0x0700
};

/*
Expand Down Expand Up @@ -138,6 +141,16 @@ enum crypt_s390_kmac_func {
KMAC_TDEA_192 = CRYPT_S390_KMAC | 3
};

/*
* function codes for PPNO (PERFORM PSEUDORANDOM NUMBER
* OPERATION) instruction
*/
enum crypt_s390_ppno_func {
PPNO_QUERY = CRYPT_S390_PPNO | 0,
PPNO_SHA512_DRNG_GEN = CRYPT_S390_PPNO | 3,
PPNO_SHA512_DRNG_SEED = CRYPT_S390_PPNO | 0x83
};

/**
* crypt_s390_km:
* @func: the function code passed to KM; see crypt_s390_km_func
Expand All @@ -162,11 +175,11 @@ static inline int crypt_s390_km(long func, void *param,
int ret;

asm volatile(
"0: .insn rre,0xb92e0000,%3,%1 \n" /* KM opcode */
"1: brc 1,0b \n" /* handle partial completion */
"0: .insn rre,0xb92e0000,%3,%1\n" /* KM opcode */
"1: brc 1,0b\n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
Expand Down Expand Up @@ -198,11 +211,11 @@ static inline int crypt_s390_kmc(long func, void *param,
int ret;

asm volatile(
"0: .insn rre,0xb92f0000,%3,%1 \n" /* KMC opcode */
"1: brc 1,0b \n" /* handle partial completion */
"0: .insn rre,0xb92f0000,%3,%1\n" /* KMC opcode */
"1: brc 1,0b\n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
Expand Down Expand Up @@ -233,11 +246,11 @@ static inline int crypt_s390_kimd(long func, void *param,
int ret;

asm volatile(
"0: .insn rre,0xb93e0000,%1,%1 \n" /* KIMD opcode */
"1: brc 1,0b \n" /* handle partial completion */
"0: .insn rre,0xb93e0000,%1,%1\n" /* KIMD opcode */
"1: brc 1,0b\n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
Expand Down Expand Up @@ -267,11 +280,11 @@ static inline int crypt_s390_klmd(long func, void *param,
int ret;

asm volatile(
"0: .insn rre,0xb93f0000,%1,%1 \n" /* KLMD opcode */
"1: brc 1,0b \n" /* handle partial completion */
"0: .insn rre,0xb93f0000,%1,%1\n" /* KLMD opcode */
"1: brc 1,0b\n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
Expand Down Expand Up @@ -302,11 +315,11 @@ static inline int crypt_s390_kmac(long func, void *param,
int ret;

asm volatile(
"0: .insn rre,0xb91e0000,%1,%1 \n" /* KLAC opcode */
"1: brc 1,0b \n" /* handle partial completion */
"0: .insn rre,0xb91e0000,%1,%1\n" /* KLAC opcode */
"1: brc 1,0b\n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "=d" (ret), "+a" (__src), "+d" (__src_len)
: "d" (__func), "a" (__param), "0" (-1) : "cc", "memory");
if (ret < 0)
Expand Down Expand Up @@ -340,11 +353,11 @@ static inline int crypt_s390_kmctr(long func, void *param, u8 *dest,
int ret = -1;

asm volatile(
"0: .insn rrf,0xb92d0000,%3,%1,%4,0 \n" /* KMCTR opcode */
"1: brc 1,0b \n" /* handle partial completion */
"0: .insn rrf,0xb92d0000,%3,%1,%4,0\n" /* KMCTR opcode */
"1: brc 1,0b\n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "+d" (ret), "+a" (__src), "+d" (__src_len), "+a" (__dest),
"+a" (__ctr)
: "d" (__func), "a" (__param) : "cc", "memory");
Expand All @@ -353,6 +366,47 @@ static inline int crypt_s390_kmctr(long func, void *param, u8 *dest,
return (func & CRYPT_S390_FUNC_MASK) ? src_len - __src_len : __src_len;
}

/**
* crypt_s390_ppno:
* @func: the function code passed to PPNO; see crypt_s390_ppno_func
* @param: address of parameter block; see POP for details on each func
* @dest: address of destination memory area
* @dest_len: size of destination memory area in bytes
* @seed: address of seed data
* @seed_len: size of seed data in bytes
*
* Executes the PPNO (PERFORM PSEUDORANDOM NUMBER OPERATION)
* operation of the CPU.
*
* Returns -1 for failure, 0 for the query func, number of random
* bytes stored in dest buffer for generate function
*/
static inline int crypt_s390_ppno(long func, void *param,
u8 *dest, long dest_len,
const u8 *seed, long seed_len)
{
register long __func asm("0") = func & CRYPT_S390_FUNC_MASK;
register void *__param asm("1") = param; /* param block (240 bytes) */
register u8 *__dest asm("2") = dest; /* buf for recv random bytes */
register long __dest_len asm("3") = dest_len; /* requested random bytes */
register const u8 *__seed asm("4") = seed; /* buf with seed data */
register long __seed_len asm("5") = seed_len; /* bytes in seed buf */
int ret = -1;

asm volatile (
"0: .insn rre,0xb93c0000,%1,%5\n" /* PPNO opcode */
"1: brc 1,0b\n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "+d" (ret), "+a"(__dest), "+d"(__dest_len)
: "d"(__func), "a"(__param), "a"(__seed), "d"(__seed_len)
: "cc", "memory");
if (ret < 0)
return ret;
return (func & CRYPT_S390_FUNC_MASK) ? dest_len - __dest_len : 0;
}

/**
* crypt_s390_func_available:
* @func: the function code of the specific function; 0 if op in general
Expand All @@ -373,6 +427,9 @@ static inline int crypt_s390_func_available(int func,
return 0;
if (facility_mask & CRYPT_S390_MSA4 && !test_facility(77))
return 0;
if (facility_mask & CRYPT_S390_MSA5 && !test_facility(57))
return 0;

switch (func & CRYPT_S390_OP_MASK) {
case CRYPT_S390_KM:
ret = crypt_s390_km(KM_QUERY, &status, NULL, NULL, 0);
Expand All @@ -390,8 +447,12 @@ static inline int crypt_s390_func_available(int func,
ret = crypt_s390_kmac(KMAC_QUERY, &status, NULL, 0);
break;
case CRYPT_S390_KMCTR:
ret = crypt_s390_kmctr(KMCTR_QUERY, &status, NULL, NULL, 0,
NULL);
ret = crypt_s390_kmctr(KMCTR_QUERY, &status,
NULL, NULL, 0, NULL);
break;
case CRYPT_S390_PPNO:
ret = crypt_s390_ppno(PPNO_QUERY, &status,
NULL, 0, NULL, 0);
break;
default:
return 0;
Expand Down Expand Up @@ -419,15 +480,14 @@ static inline int crypt_s390_pcc(long func, void *param)
int ret = -1;

asm volatile(
"0: .insn rre,0xb92c0000,0,0 \n" /* PCC opcode */
"1: brc 1,0b \n" /* handle partial completion */
"0: .insn rre,0xb92c0000,0,0\n" /* PCC opcode */
"1: brc 1,0b\n" /* handle partial completion */
" la %0,0\n"
"2:\n"
EX_TABLE(0b,2b) EX_TABLE(1b,2b)
EX_TABLE(0b, 2b) EX_TABLE(1b, 2b)
: "+d" (ret)
: "d" (__func), "a" (__param) : "cc", "memory");
return ret;
}


#endif /* _CRYPTO_ARCH_S390_CRYPT_S390_H */
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