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Violators will be prosecuted; (version=TLSv1/SSLv3 cipher=AES256-GCM-SHA384 bits=256/256) Fri, 6 Mar 2020 09:59:29 -0000 Received: from d06av22.portsmouth.uk.ibm.com (d06av22.portsmouth.uk.ibm.com [9.149.105.58]) by b06cxnps4075.portsmouth.uk.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id 0269xTrb57081900 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Fri, 6 Mar 2020 09:59:29 GMT Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id F0B1D4C04A; Fri, 6 Mar 2020 09:59:28 +0000 (GMT) Received: from d06av22.portsmouth.uk.ibm.com (unknown [127.0.0.1]) by IMSVA (Postfix) with ESMTP id 982DD4C044; Fri, 6 Mar 2020 09:59:28 +0000 (GMT) Received: from localhost.localdomain (unknown [9.145.37.7]) by d06av22.portsmouth.uk.ibm.com (Postfix) with ESMTP; Fri, 6 Mar 2020 09:59:28 +0000 (GMT) Subject: Re: [PATCH v6 02/18] s390x: protvirt: Add diag308 subcodes 8 - 10 To: David Hildenbrand , qemu-devel@nongnu.org References: <20200304114231.23493-1-frankja@linux.ibm.com> <20200304114231.23493-3-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/68.2.2 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="5RdtzIn7xZfKIAUT0Ja7172uCV2rALsQQ" X-TM-AS-GCONF: 00 x-cbid: 20030609-0020-0000-0000-000003B107DA X-IBM-AV-DETECTION: SAVI=unused REMOTE=unused XFE=unused x-cbparentid: 20030609-0021-0000-0000-000022094791 Message-Id: <9af18035-df37-5a7a-f4f8-b5ba5f2ad4b0@linux.ibm.com> X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138, 18.0.572 definitions=2020-03-06_02:2020-03-05, 2020-03-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=2 malwarescore=0 bulkscore=0 phishscore=0 impostorscore=0 spamscore=0 adultscore=0 clxscore=1015 mlxlogscore=999 priorityscore=1501 mlxscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2003060070 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x [generic] 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: borntraeger@de.ibm.com, qemu-s390x@nongnu.org, cohuck@redhat.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) --5RdtzIn7xZfKIAUT0Ja7172uCV2rALsQQ Content-Type: multipart/mixed; boundary="F9qQOvQFy1PqJDdGAgMGlx8fYNu626zCW" --F9qQOvQFy1PqJDdGAgMGlx8fYNu626zCW Content-Type: text/plain; charset=windows-1252 Content-Language: en-US Content-Transfer-Encoding: quoted-printable On 3/4/20 6:06 PM, David Hildenbrand wrote: > On 04.03.20 12:42, Janosch Frank wrote: >> For diag308 subcodes 8 - 10 we have a new ipib of type 5. The ipib >> holds the address and length of the secure execution header, as well >> as a list of guest components. >> >> Each component is a block of memory, for example kernel or initrd, >> which needs to be decrypted by the Ultravisor in order to run a >> protected VM. The secure execution header instructs the Ultravisor on >> how to handle the protected VM and its components. >> >> Subcodes 8 and 9 are similiar to 5 and 6 and subcode 10 will finally >> start the protected guest. >> >> Subcodes 8-10 are not valid in protected mode, we have to do a subcode= >> 3 and then the 8 and 10 combination for a protected reboot. >> >> Signed-off-by: Janosch Frank >> --- >> hw/s390x/ipl.c | 47 ++++++++++++++++++++++++++++++++++++++++++--= - >> hw/s390x/ipl.h | 32 ++++++++++++++++++++++++++++++ >> target/s390x/diag.c | 26 ++++++++++++++++++++++--- >> 3 files changed, 99 insertions(+), 6 deletions(-) >> >> diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c >> index 9c1ecd423c..80c6ab233a 100644 >> --- a/hw/s390x/ipl.c >> +++ b/hw/s390x/ipl.c >> @@ -538,15 +538,55 @@ static bool is_virtio_scsi_device(IplParameterBl= ock *iplb) >> return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI); >> } >> =20 >> +int s390_ipl_pv_check_components(IplParameterBlock *iplb) >> +{ >> + int i; >> + IPLBlockPV *ipib_pv =3D &iplb->pv; >> + >> + if (ipib_pv->num_comp =3D=3D 0) { >> + return -EINVAL; >> + } >> + >> + for (i =3D 0; i < ipib_pv->num_comp; i++) { >> + /* Addr must be 4k aligned */ >> + if (ipib_pv->components[i].addr & ~TARGET_PAGE_MASK) { >> + return -EINVAL; >> + } >> + >> + /* Tweak prefix is monotonously increasing with each componen= t */ >> + if (i < ipib_pv->num_comp - 1 && >> + ipib_pv->components[i].tweak_pref > >> + ipib_pv->components[i + 1].tweak_pref) { >> + return -EINVAL; >> + } >> + } >> + return 0; >> +} >> + >> void s390_ipl_update_diag308(IplParameterBlock *iplb) >> { >> S390IPLState *ipl =3D get_ipl_device(); >> =20 >> - ipl->iplb =3D *iplb; >> - ipl->iplb_valid =3D true; >> + if (iplb->pbt =3D=3D S390_IPL_TYPE_PV) { >> + ipl->iplb_pv =3D *iplb; >> + ipl->iplb_valid_pv =3D true; >> + } else { >> + ipl->iplb =3D *iplb; >> + ipl->iplb_valid =3D true; >> + } >> ipl->netboot =3D is_virtio_net_device(iplb); >> } >> =20 >> +IplParameterBlock *s390_ipl_get_iplb_secure(void) >> +{ >> + S390IPLState *ipl =3D get_ipl_device(); >> + >> + if (!ipl->iplb_valid_pv) { >> + return NULL; >> + } >> + return &ipl->iplb_pv; >> +} >> + >> IplParameterBlock *s390_ipl_get_iplb(void) >> { >> S390IPLState *ipl =3D get_ipl_device(); >> @@ -561,7 +601,8 @@ void s390_ipl_reset_request(CPUState *cs, enum s39= 0_reset reset_type) >> { >> S390IPLState *ipl =3D get_ipl_device(); >> =20 >> - if (reset_type =3D=3D S390_RESET_EXTERNAL || reset_type =3D=3D S3= 90_RESET_REIPL) { >> + if (reset_type =3D=3D S390_RESET_EXTERNAL || reset_type =3D=3D S3= 90_RESET_REIPL || >> + reset_type =3D=3D S390_RESET_PV) { >> /* use CPU 0 for full resets */ >> ipl->reset_cpu_index =3D 0; >> } else { >> diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h >> index d4813105db..04be63cee1 100644 >> --- a/hw/s390x/ipl.h >> +++ b/hw/s390x/ipl.h >> @@ -15,6 +15,24 @@ >> #include "cpu.h" >> #include "hw/qdev-core.h" >> =20 >> +struct IPLBlockPVComp { >> + uint64_t tweak_pref; >> + uint64_t addr; >> + uint64_t size; >> +} QEMU_PACKED; >> +typedef struct IPLBlockPVComp IPLBlockPVComp; >> + >> +struct IPLBlockPV { >> + uint8_t reserved[87]; >> + uint8_t version; >> + uint32_t reserved70; >> + uint32_t num_comp; >> + uint64_t pv_header_addr; >> + uint64_t pv_header_len; >> + struct IPLBlockPVComp components[]; >> +} QEMU_PACKED; >> +typedef struct IPLBlockPV IPLBlockPV; >> + >> struct IplBlockCcw { >> uint8_t reserved0[85]; >> uint8_t ssid; >> @@ -71,6 +89,7 @@ union IplParameterBlock { >> union { >> IplBlockCcw ccw; >> IplBlockFcp fcp; >> + IPLBlockPV pv; >> IplBlockQemuScsi scsi; >> }; >> } QEMU_PACKED; >> @@ -84,9 +103,11 @@ union IplParameterBlock { >> typedef union IplParameterBlock IplParameterBlock; >> =20 >> int s390_ipl_set_loadparm(uint8_t *loadparm); >> +int s390_ipl_pv_check_components(IplParameterBlock *iplb); >> void s390_ipl_update_diag308(IplParameterBlock *iplb); >> void s390_ipl_prepare_cpu(S390CPU *cpu); >> IplParameterBlock *s390_ipl_get_iplb(void); >> +IplParameterBlock *s390_ipl_get_iplb_secure(void); >> =20 >> enum s390_reset { >> /* default is a reset not triggered by a CPU e.g. issued by QMP *= / >> @@ -94,6 +115,7 @@ enum s390_reset { >> S390_RESET_REIPL, >> S390_RESET_MODIFIED_CLEAR, >> S390_RESET_LOAD_NORMAL, >> + S390_RESET_PV, >> }; >> void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type)= ; >> void s390_ipl_get_reset_request(CPUState **cs, enum s390_reset *reset= _type); >> @@ -133,6 +155,7 @@ struct S390IPLState { >> /*< private >*/ >> DeviceState parent_obj; >> IplParameterBlock iplb; >> + IplParameterBlock iplb_pv; >> QemuIplParameters qipl; >> uint64_t start_addr; >> uint64_t compat_start_addr; >> @@ -140,6 +163,7 @@ struct S390IPLState { >> uint64_t compat_bios_start_addr; >> bool enforce_bios; >> bool iplb_valid; >> + bool iplb_valid_pv; >> bool netboot; >> /* reset related properties don't have to be migrated or reset */= >> enum s390_reset reset_type; >> @@ -161,9 +185,11 @@ QEMU_BUILD_BUG_MSG(offsetof(S390IPLState, iplb) &= 3, "alignment of iplb wrong"); >> =20 >> #define S390_IPL_TYPE_FCP 0x00 >> #define S390_IPL_TYPE_CCW 0x02 >> +#define S390_IPL_TYPE_PV 0x05 >> #define S390_IPL_TYPE_QEMU_SCSI 0xff >> =20 >> #define S390_IPLB_HEADER_LEN 8 >> +#define S390_IPLB_MIN_PV_LEN 148 >> #define S390_IPLB_MIN_CCW_LEN 200 >> #define S390_IPLB_MIN_FCP_LEN 384 >> #define S390_IPLB_MIN_QEMU_SCSI_LEN 200 >> @@ -185,4 +211,10 @@ static inline bool iplb_valid_fcp(IplParameterBlo= ck *iplb) >> iplb->pbt =3D=3D S390_IPL_TYPE_FCP; >> } >> =20 >> +static inline bool iplb_valid_pv(IplParameterBlock *iplb) >> +{ >> + return be32_to_cpu(iplb->len) >=3D S390_IPLB_MIN_PV_LEN && >> + iplb->pbt =3D=3D S390_IPL_TYPE_PV; >> +} >> + >> #endif >> diff --git a/target/s390x/diag.c b/target/s390x/diag.c >> index b5aec06d6b..945b263f0a 100644 >> --- a/target/s390x/diag.c >> +++ b/target/s390x/diag.c >> @@ -52,6 +52,7 @@ int handle_diag_288(CPUS390XState *env, uint64_t r1,= uint64_t r3) >> #define DIAG_308_RC_OK 0x0001 >> #define DIAG_308_RC_NO_CONF 0x0102 >> #define DIAG_308_RC_INVALID 0x0402 >> +#define DIAG_308_RC_NO_PV_CONF 0x0902 >> =20 >> #define DIAG308_RESET_MOD_CLR 0 >> #define DIAG308_RESET_LOAD_NORM 1 >> @@ -59,6 +60,9 @@ int handle_diag_288(CPUS390XState *env, uint64_t r1,= uint64_t r3) >> #define DIAG308_LOAD_NORMAL_DUMP 4 >> #define DIAG308_SET 5 >> #define DIAG308_STORE 6 >> +#define DIAG308_PV_SET 8 >> +#define DIAG308_PV_STORE 9 >> +#define DIAG308_PV_START 10 >> =20 >> static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64= _t addr, >> uintptr_t ra, bool write) >> @@ -105,6 +109,7 @@ void handle_diag_308(CPUS390XState *env, uint64_t = r1, uint64_t r3, uintptr_t ra) >> s390_ipl_reset_request(cs, S390_RESET_REIPL); >> break; >> case DIAG308_SET: >> + case DIAG308_PV_SET: >> if (diag308_parm_check(env, r1, addr, ra, false)) { >> return; >> } >> @@ -117,7 +122,8 @@ void handle_diag_308(CPUS390XState *env, uint64_t = r1, uint64_t r3, uintptr_t ra) >> =20 >> cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len));= >> =20 >> - if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb)) { >> + if (!iplb_valid_ccw(iplb) && !iplb_valid_fcp(iplb) && >> + !(iplb_valid_pv(iplb) && !s390_ipl_pv_check_components(ip= lb))) { >> env->regs[r1 + 1] =3D DIAG_308_RC_INVALID; >> goto out; >> } >> @@ -128,17 +134,31 @@ out: >> g_free(iplb); >> return; >> case DIAG308_STORE: >> + case DIAG308_PV_STORE: >> if (diag308_parm_check(env, r1, addr, ra, true)) { >> return; >> } >> - iplb =3D s390_ipl_get_iplb(); >> + if (subcode =3D=3D DIAG308_PV_STORE) { >> + iplb =3D s390_ipl_get_iplb_secure(); >> + } else { >> + iplb =3D s390_ipl_get_iplb(); >> + } >> if (iplb) { >> cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->l= en)); >> env->regs[r1 + 1] =3D DIAG_308_RC_OK; >> } else { >> env->regs[r1 + 1] =3D DIAG_308_RC_NO_CONF; >> } >> - return; >> + break; >> + case DIAG308_PV_START: >> + iplb =3D s390_ipl_get_iplb_secure(); >> + if (!iplb || !iplb_valid_pv(iplb)) { >> + env->regs[r1 + 1] =3D DIAG_308_RC_NO_PV_CONF; >> + return; >> + } >> + >> + s390_ipl_reset_request(cs, S390_RESET_PV); >> + break; >> default: >> s390_program_interrupt(env, PGM_SPECIFICATION, ra); >> break; >> >=20 > Sorry, another comment. The new subcodes should be fenced via the cpu > model or similar. Applying this patch and triggering one of these > subcodes will end in a questionable state. >=20 Ahh, yes, we removed the KVM check for this. 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