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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Thu, 21 Nov 2019 11:28:12 -0000 Received: from b06wcsmtp001.portsmouth.uk.ibm.com (b06wcsmtp001.portsmouth.uk.ibm.com [9.149.105.160]) by b06avi18626390.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id xALBRXm241812354 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Thu, 21 Nov 2019 11:27:33 GMT Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 0B745A405F; Thu, 21 Nov 2019 11:28:11 +0000 (GMT) Received: from b06wcsmtp001.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 87E12A4054; Thu, 21 Nov 2019 11:28:10 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.70.129]) by b06wcsmtp001.portsmouth.uk.ibm.com (Postfix) with ESMTP; Thu, 21 Nov 2019 11:28:10 +0000 (GMT) Subject: Re: [PATCH 02/15] s390x: Beautify diag308 handling To: David Hildenbrand , qemu-devel@nongnu.org References: <20191120114334.2287-1-frankja@linux.ibm.com> <20191120114334.2287-3-frankja@linux.ibm.com> From: Janosch Frank Autocrypt: addr=frankja@linux.ibm.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.1.1 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="vH2pVTml2dPELYPtLpORat4KxEVNMVWxF" X-TM-AS-GCONF: 00 x-cbid: 19112111-0020-0000-0000-0000038CD898 X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 19112111-0021-0000-0000-000021E31225 Message-Id: <933f425e-7353-775c-f8b4-efb0c21e9bf8@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,18.0.572 definitions=2019-11-21_02:2019-11-21,2019-11-21 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=2 spamscore=0 clxscore=1015 adultscore=0 malwarescore=0 phishscore=0 impostorscore=0 bulkscore=0 mlxscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-1911210104 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] [fuzzy] X-Received-From: 148.163.156.1 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: thuth@redhat.com, pmorel@linux.ibm.com, cohuck@redhat.com, borntraeger@de.ibm.com, qemu-s390x@nongnu.org, mihajlov@linux.ibm.com Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --vH2pVTml2dPELYPtLpORat4KxEVNMVWxF Content-Type: multipart/mixed; boundary="HagdVoBrpDaWBO7eA0fmFJe5e7tjtlGB4" --HagdVoBrpDaWBO7eA0fmFJe5e7tjtlGB4 Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 11/21/19 12:21 PM, David Hildenbrand wrote: > On 20.11.19 12:43, Janosch Frank wrote: >> Let's improve readability by: >> * Using constants for the subcodes >> * Moving parameter checking into a function >> * Removing subcode > 6 check as the default case catches that >> >> Signed-off-by: Janosch Frank >> --- >> target/s390x/diag.c | 54 +++++++++++++++++++++++++++----------------= -- >> 1 file changed, 32 insertions(+), 22 deletions(-) >> >> diff --git a/target/s390x/diag.c b/target/s390x/diag.c >> index 53c2f81f2a..067c667ba7 100644 >> --- a/target/s390x/diag.c >> +++ b/target/s390x/diag.c >> @@ -53,6 +53,29 @@ int handle_diag_288(CPUS390XState *env, uint64_t r1= , uint64_t r3) >> #define DIAG_308_RC_NO_CONF 0x0102 >> #define DIAG_308_RC_INVALID 0x0402 >> =20 >> +#define DIAG308_RES_MOD_CLR 0 >> +#define DIAG308_RES_LOAD_NORM 1 >> +#define DIAG308_LOAD_CLEAR 3 >> +#define DIAG308_LOAD_NORMAL_DUMP 4 >> +#define DIAG308_SET 5 >> +#define DIAG308_STORE 6 >> + >> +static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64= _t addr, >> + uintptr_t ra, bool write) >> +{ >> + if ((r1 & 1) || (addr & ~TARGET_PAGE_MASK)) { >> + s390_program_interrupt(env, PGM_SPECIFICATION, ra); >> + return -EINVAL; >> + } >> + if (!address_space_access_valid(&address_space_memory, addr, >> + sizeof(IplParameterBlock), write,= >> + MEMTXATTRS_UNSPECIFIED)) { >> + s390_program_interrupt(env, PGM_ADDRESSING, ra); >> + return -EINVAL; >> + } >> + return 0; >> +} >> + >> void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, u= intptr_t ra) >> { >> CPUState *cs =3D env_cpu(env); >> @@ -65,30 +88,24 @@ void handle_diag_308(CPUS390XState *env, uint64_t = r1, uint64_t r3, uintptr_t ra) >> return; >> } >> =20 >> - if ((subcode & ~0x0ffffULL) || (subcode > 6)) { >> + if (subcode & ~0x0ffffULL) { >=20 > Strange, the default case in the switch was basically dead code. >=20 >> s390_program_interrupt(env, PGM_SPECIFICATION, ra); >> return; >> } >> =20 >> switch (subcode) { >> - case 0: >> + case DIAG308_RES_MOD_CLR: >> s390_ipl_reset_request(cs, S390_RESET_MODIFIED_CLEAR); >> break; >> - case 1: >> + case DIAG308_RES_LOAD_NORM: >> s390_ipl_reset_request(cs, S390_RESET_LOAD_NORMAL); >> break; >> - case 3: >> + case DIAG308_LOAD_CLEAR: >> + /* Well we still lack the clearing bit... */ >> s390_ipl_reset_request(cs, S390_RESET_REIPL); >> break; >> - case 5: >> - if ((r1 & 1) || (addr & 0x0fffULL)) { >> - s390_program_interrupt(env, PGM_SPECIFICATION, ra); >> - return; >> - } >> - if (!address_space_access_valid(&address_space_memory, addr, >> - sizeof(IplParameterBlock), fa= lse, >> - MEMTXATTRS_UNSPECIFIED)) { >> - s390_program_interrupt(env, PGM_ADDRESSING, ra); >> + case DIAG308_SET: >> + if (diag308_parm_check(env, r1, addr, ra, false)) { >> return; >> } >> iplb =3D g_new0(IplParameterBlock, 1); >> @@ -110,15 +127,8 @@ void handle_diag_308(CPUS390XState *env, uint64_t= r1, uint64_t r3, uintptr_t ra) >> out: >> g_free(iplb); >> return; >> - case 6: >> - if ((r1 & 1) || (addr & 0x0fffULL)) { >> - s390_program_interrupt(env, PGM_SPECIFICATION, ra); >> - return; >> - } >> - if (!address_space_access_valid(&address_space_memory, addr, >> - sizeof(IplParameterBlock), tr= ue, >> - MEMTXATTRS_UNSPECIFIED)) { >> - s390_program_interrupt(env, PGM_ADDRESSING, ra); >> + case DIAG308_STORE: >> + if (diag308_parm_check(env, r1, addr, ra, true)) { >> return; >> } >> iplb =3D s390_ipl_get_iplb(); >> >=20 > Reviewed-by: David Hildenbrand Thanks! --HagdVoBrpDaWBO7eA0fmFJe5e7tjtlGB4-- --vH2pVTml2dPELYPtLpORat4KxEVNMVWxF Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEwGNS88vfc9+v45Yq41TmuOI4ufgFAl3WdMoACgkQ41TmuOI4 ufhklQ/+NsQf9u4YlPYN8s07JKtAuAxEqd8r9WZJLK8ZOM8+RpJ+VwSm2PKZdVbv /km0iYc6EjlSskDEUl9xXkUQPmBEeDmhmTRpmha1gwS3V7xitiFPESCo/BI2/kRm GOCZA4C75nDmgFsXyICpoynkfi6ETIR5ATw0uij2aGatjYPI8C2ajOwIr4+FfpwW oOdmXQVGE9uKIhhg+OkHZj4NGA1lnKfCdfYcKkb7I8VnyeZp3nY+HqXZpL+sgmvL j+r1ZzhgSxK/Yew7lNHmc7eZ9sjRPosoHEEgQWMppV5kl4gAFh0hGIdX4JjR0T+Y lnCp5Ubt382LCXBDLjLWJZT6YxvY6M1/AaOVsRxY+9XajatbdYOCm5bhWNFTsQDc /dV4rUBtEjMU/rPyDRgB4IT540a2Ts2qiY0F2PoswrqYrRKN0QKa2fT0R/TAcMoU hCEqmNshUAf+DZ2UDIUe1Y0SA4nGsPP/Qb8auVF/mP1L010S2KJkrNCr4DYPGFGC IrBG4VfpaeX37gRIAiW+qfT5aa6XbUpqLvoG5hzsVL6Pd7iaPxSjeHj0HMooqXpv b/Hb9EBEwwo75/+584v1umxJczai/K6VSGByZco2VKBKsOnVxH97YtoIyN5qBf5h 5uEBI6upsDftXKGr9NFqwK8EZ0WVqCPo/EL0w3+4c3E4ba3NOpA= =Ahkl -----END PGP SIGNATURE----- --vH2pVTml2dPELYPtLpORat4KxEVNMVWxF--