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s390x/tcg: add basic MSA features 

The STFLE bits for the MSA (extension) facilities simply indicate that
the respective instructions can be executed. The QUERY subfunction can then
be used to identify which features exactly are available.

Availability of subfunctions can also vary on real hardware. For now, we
simply implement a CPU model without any available subfunctions except
QUERY (which is always around).

As all MSA functions behave quite similarly, we can use one translation
handler for now. Prepare the code for implementation of actual subfunctions.

At least MSA is helpful for now, as older Linux kernels require this
facility when compiled for a z9 model. Allow to enable the facilities
for the qemu cpu model.

Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20170920153016.3858-4-david@redhat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Cornelia Huck <cohuck@redhat.com>
This commit is contained in:
David Hildenbrand 2017-09-20 17:30:16 +02:00 committed by Cornelia Huck
parent 7634d658e6
commit 7705c75048
6 changed files with 140 additions and 1 deletions
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2
target/s390x/Makefile.objs
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@ -1,6 +1,6 @@
obj-y += cpu.o cpu_models.o cpu_features.o gdbstub.o interrupt.o helper.o
obj-$(CONFIG_TCG) += translate.o cc_helper.o excp_helper.o fpu_helper.o
obj-$(CONFIG_TCG) += int_helper.o mem_helper.o misc_helper.o
obj-$(CONFIG_TCG) += int_helper.o mem_helper.o misc_helper.o crypto_helper.o
obj-$(CONFIG_SOFTMMU) += machine.o ioinst.o arch_dump.o mmu_helper.o diag.o
obj-$(CONFIG_KVM) += kvm.o
obj-$(call lnot,$(CONFIG_KVM)) += kvm-stub.o

4
target/s390x/cpu_models.c
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@ -825,6 +825,7 @@ static void add_qemu_cpu_model_features(S390FeatBitmap fbm)
S390_FEAT_STFLE,
S390_FEAT_EXTENDED_IMMEDIATE,
S390_FEAT_EXTENDED_TRANSLATION_2,
S390_FEAT_MSA,
S390_FEAT_EXTENDED_TRANSLATION_3,
S390_FEAT_LONG_DISPLACEMENT,
S390_FEAT_LONG_DISPLACEMENT_FAST,
@ -841,6 +842,9 @@ static void add_qemu_cpu_model_features(S390FeatBitmap fbm)
S390_FEAT_STFLE_49,
S390_FEAT_LOCAL_TLB_CLEARING,
S390_FEAT_STFLE_53,
S390_FEAT_MSA_EXT_5,
S390_FEAT_MSA_EXT_3,
S390_FEAT_MSA_EXT_4,
};
int i;

65
target/s390x/crypto_helper.c Normal file
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@ -0,0 +1,65 @@
/*
* s390x crypto helpers
*
* Copyright (c) 2017 Red Hat Inc
*
* Authors:
* David Hildenbrand <david@redhat.com>
*
* This work is licensed under the terms of the GNU GPL, version 2 or later.
* See the COPYING file in the top-level directory.
*/
#include "qemu/osdep.h"
#include "qemu/main-loop.h"
#include "internal.h"
#include "exec/helper-proto.h"
#include "exec/exec-all.h"
#include "exec/cpu_ldst.h"
uint32_t HELPER(msa)(CPUS390XState *env, uint32_t r1, uint32_t r2, uint32_t r3,
uint32_t type)
{
const uintptr_t ra = GETPC();
const uint8_t mod = env->regs[0] & 0x80ULL;
const uint8_t fc = env->regs[0] & 0x7fULL;
CPUState *cs = CPU(s390_env_get_cpu(env));
uint8_t subfunc[16] = { 0 };
uint64_t param_addr;
int i;
switch (type) {
case S390_FEAT_TYPE_KMAC:
case S390_FEAT_TYPE_KIMD:
case S390_FEAT_TYPE_KLMD:
case S390_FEAT_TYPE_PCKMO:
case S390_FEAT_TYPE_PCC:
if (mod) {
cpu_restore_state(cs, ra);
program_interrupt(env, PGM_SPECIFICATION, 4);
return 0;
}
break;
}
s390_get_feat_block(type, subfunc);
if (!test_be_bit(fc, subfunc)) {
cpu_restore_state(cs, ra);
program_interrupt(env, PGM_SPECIFICATION, 4);
return 0;
}
switch (fc) {
case 0: /* query subfunction */
for (i = 0; i < 16; i++) {
param_addr = wrap_address(env, env->regs[1] + i);
cpu_stb_data_ra(env, param_addr, subfunc[i], ra);
}
break;
default:
/* we don't implement any other subfunction yet */
g_assert_not_reached();
}
return 0;
}

1
target/s390x/helper.h
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@ -115,6 +115,7 @@ DEF_HELPER_4(cu21, i32, env, i32, i32, i32)
DEF_HELPER_4(cu24, i32, env, i32, i32, i32)
DEF_HELPER_4(cu41, i32, env, i32, i32, i32)
DEF_HELPER_4(cu42, i32, env, i32, i32, i32)
DEF_HELPER_5(msa, i32, env, i32, i32, i32, i32)
#ifndef CONFIG_USER_ONLY
DEF_HELPER_3(servc, i32, env, i64, i64)

13
target/s390x/insn-data.def
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@ -941,6 +941,19 @@
/* UNPACK UNICODE */
C(0xe200, UNPKU, SS_a, E2, la1, a2, 0, 0, unpku, 0)
/* MSA Instructions */
D(0xb91e, KMAC, RRE, MSA, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KMAC)
D(0xb928, PCKMO, RRE, MSA3, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_PCKMO)
D(0xb92a, KMF, RRE, MSA4, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KMF)
D(0xb92b, KMO, RRE, MSA4, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KMO)
D(0xb92c, PCC, RRE, MSA4, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_PCC)
D(0xb92d, KMCTR, RRF_b, MSA4, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KMCTR)
D(0xb92e, KM, RRE, MSA, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KM)
D(0xb92f, KMC, RRE, MSA, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KMC)
D(0xb93c, PPNO, RRE, MSA5, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_PPNO)
D(0xb93e, KIMD, RRE, MSA, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KIMD)
D(0xb93f, KLMD, RRE, MSA, 0, 0, 0, 0, msa, 0, S390_FEAT_TYPE_KLMD)
#ifndef CONFIG_USER_ONLY
/* COMPARE AND SWAP AND PURGE */
D(0xb250, CSP, RRE, Z, r1_32u, ra2, r1_P, 0, csp, 0, MO_TEUL)

56
target/s390x/translate.c
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@ -2422,6 +2422,58 @@ static ExitStatus op_iske(DisasContext *s, DisasOps *o)
}
#endif
static ExitStatus op_msa(DisasContext *s, DisasOps *o)
{
int r1 = have_field(s->fields, r1) ? get_field(s->fields, r1) : 0;
int r2 = have_field(s->fields, r2) ? get_field(s->fields, r2) : 0;
int r3 = have_field(s->fields, r3) ? get_field(s->fields, r3) : 0;
TCGv_i32 t_r1, t_r2, t_r3, type;
switch (s->insn->data) {
case S390_FEAT_TYPE_KMCTR:
if (r3 & 1 || !r3) {
gen_program_exception(s, PGM_SPECIFICATION);
return EXIT_NORETURN;
}
/* FALL THROUGH */
case S390_FEAT_TYPE_PPNO:
case S390_FEAT_TYPE_KMF:
case S390_FEAT_TYPE_KMC:
case S390_FEAT_TYPE_KMO:
case S390_FEAT_TYPE_KM:
if (r1 & 1 || !r1) {
gen_program_exception(s, PGM_SPECIFICATION);
return EXIT_NORETURN;
}
/* FALL THROUGH */
case S390_FEAT_TYPE_KMAC:
case S390_FEAT_TYPE_KIMD:
case S390_FEAT_TYPE_KLMD:
if (r2 & 1 || !r2) {
gen_program_exception(s, PGM_SPECIFICATION);
return EXIT_NORETURN;
}
/* FALL THROUGH */
case S390_FEAT_TYPE_PCKMO:
case S390_FEAT_TYPE_PCC:
break;
default:
g_assert_not_reached();
};
t_r1 = tcg_const_i32(r1);
t_r2 = tcg_const_i32(r2);
t_r3 = tcg_const_i32(r3);
type = tcg_const_i32(s->insn->data);
gen_helper_msa(cc_op, cpu_env, t_r1, t_r2, t_r3, type);
set_cc_static(s);
tcg_temp_free_i32(t_r1);
tcg_temp_free_i32(t_r2);
tcg_temp_free_i32(t_r3);
tcg_temp_free_i32(type);
return NO_EXIT;
}
static ExitStatus op_keb(DisasContext *s, DisasOps *o)
{
gen_helper_keb(cc_op, cpu_env, o->in1, o->in2);
@ -5505,6 +5557,10 @@ enum DisasInsnEnum {
#define FAC_PPA S390_FEAT_STFLE_49 /* processor-assist */
#define FAC_LZRB S390_FEAT_STFLE_53 /* load-and-zero-rightmost-byte */
#define FAC_ETF3 S390_FEAT_EXTENDED_TRANSLATION_3
#define FAC_MSA S390_FEAT_MSA /* message-security-assist facility */
#define FAC_MSA3 S390_FEAT_MSA_EXT_3 /* msa-extension-3 facility */
#define FAC_MSA4 S390_FEAT_MSA_EXT_4 /* msa-extension-4 facility */
#define FAC_MSA5 S390_FEAT_MSA_EXT_5 /* msa-extension-5 facility */
static const DisasInsn insn_info[] = {
#include "insn-data.def"