| Message ID | 20200214151636.8764-5-frankja@linux.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | s390x: Protected Virtualization support | expand |
On Fri, 14 Feb 2020 10:16:23 -0500 Janosch Frank <frankja@linux.ibm.com> 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 <frankja@linux.ibm.com> > --- > hw/s390x/ipl.c | 48 ++++++++++++++++++++++++++++++++++++++++++--- > hw/s390x/ipl.h | 31 +++++++++++++++++++++++++++++ > target/s390x/diag.c | 27 ++++++++++++++++++++++--- > 3 files changed, 100 insertions(+), 6 deletions(-) (...) > void s390_ipl_update_diag308(IplParameterBlock *iplb) > { > S390IPLState *ipl = get_ipl_device(); > > - ipl->iplb = *iplb; > - ipl->iplb_valid = true; > + if (iplb->pbt == 5) { Magic value; maybe introduce a #define or at least a comment? > + ipl->iplb_pbt5 = *iplb; > + ipl->iplb_valid_pbt5 = true; > + } else { > + ipl->iplb = *iplb; > + ipl->iplb_valid = true; > + } > ipl->netboot = is_virtio_net_device(iplb); > } > @@ -133,6 +154,7 @@ struct S390IPLState { > /*< private >*/ > DeviceState parent_obj; > IplParameterBlock iplb; > + IplParameterBlock iplb_pbt5; Add /* for protected virtualization */ ? Or, if this is not used for anything else, call it iplb_pv? > QemuIplParameters qipl; > uint64_t start_addr; > uint64_t compat_start_addr; (...) > diff --git a/target/s390x/diag.c b/target/s390x/diag.c > index b5aec06d6b..4ba6033609 100644 > --- a/target/s390x/diag.c > +++ b/target/s390x/diag.c > @@ -52,6 +52,8 @@ 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 0x0a02 > +#define DIAG_308_RC_INV_FOR_PV 0x0b02 DIAG_308_RC_INVAL_FOR_PV ? > > #define DIAG308_RESET_MOD_CLR 0 > #define DIAG308_RESET_LOAD_NORM 1 (...) > @@ -128,17 +135,31 @@ out: > g_free(iplb); > return; > case DIAG308_STORE: > + case DIAG308_PV_STORE: > if (diag308_parm_check(env, r1, addr, ra, true)) { > return; > } > - iplb = s390_ipl_get_iplb(); > + if (subcode == DIAG308_PV_STORE) { > + iplb = s390_ipl_get_iplb_secure(); > + } else { > + iplb = s390_ipl_get_iplb(); > + } iplb = (subcode == DIAG308_PV_STORE) ? s390_ipl_get_iplb_secure() : s390_ipl_get_iplb(); Matter of taste, I guess. > if (iplb) { > cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); > env->regs[r1 + 1] = DIAG_308_RC_OK; > } else { > env->regs[r1 + 1] = DIAG_308_RC_NO_CONF; > } > - return; > + break; > + case DIAG308_PV_START: > + iplb = s390_ipl_get_iplb_secure(); > + if (!iplb || !iplb_valid_pv(iplb)) { > + env->regs[r1 + 1] = 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;
On 2/20/20 11:07 AM, Cornelia Huck wrote: > On Fri, 14 Feb 2020 10:16:23 -0500 > Janosch Frank <frankja@linux.ibm.com> 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 <frankja@linux.ibm.com> >> --- >> hw/s390x/ipl.c | 48 ++++++++++++++++++++++++++++++++++++++++++--- >> hw/s390x/ipl.h | 31 +++++++++++++++++++++++++++++ >> target/s390x/diag.c | 27 ++++++++++++++++++++++--- >> 3 files changed, 100 insertions(+), 6 deletions(-) > > (...) > >> void s390_ipl_update_diag308(IplParameterBlock *iplb) >> { >> S390IPLState *ipl = get_ipl_device(); >> >> - ipl->iplb = *iplb; >> - ipl->iplb_valid = true; >> + if (iplb->pbt == 5) { > > Magic value; maybe introduce a #define or at least a comment? Well, there is already one defined, but it seems I never came around to use it -_- > >> + ipl->iplb_pbt5 = *iplb; >> + ipl->iplb_valid_pbt5 = true; >> + } else { >> + ipl->iplb = *iplb; >> + ipl->iplb_valid = true; >> + } >> ipl->netboot = is_virtio_net_device(iplb); >> } > >> @@ -133,6 +154,7 @@ struct S390IPLState { >> /*< private >*/ >> DeviceState parent_obj; >> IplParameterBlock iplb; >> + IplParameterBlock iplb_pbt5; > > Add /* for protected virtualization */ ? > > Or, if this is not used for anything else, call it iplb_pv? ack. > >> QemuIplParameters qipl; >> uint64_t start_addr; >> uint64_t compat_start_addr; > > (...) > >> diff --git a/target/s390x/diag.c b/target/s390x/diag.c >> index b5aec06d6b..4ba6033609 100644 >> --- a/target/s390x/diag.c >> +++ b/target/s390x/diag.c >> @@ -52,6 +52,8 @@ 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 0x0a02 >> +#define DIAG_308_RC_INV_FOR_PV 0x0b02 > > DIAG_308_RC_INVAL_FOR_PV ? ack > >> >> #define DIAG308_RESET_MOD_CLR 0 >> #define DIAG308_RESET_LOAD_NORM 1 > > (...) > >> @@ -128,17 +135,31 @@ out: >> g_free(iplb); >> return; >> case DIAG308_STORE: >> + case DIAG308_PV_STORE: >> if (diag308_parm_check(env, r1, addr, ra, true)) { >> return; >> } >> - iplb = s390_ipl_get_iplb(); >> + if (subcode == DIAG308_PV_STORE) { >> + iplb = s390_ipl_get_iplb_secure(); >> + } else { >> + iplb = s390_ipl_get_iplb(); >> + } > > iplb = (subcode == DIAG308_PV_STORE) ? > s390_ipl_get_iplb_secure() : s390_ipl_get_iplb(); > > Matter of taste, I guess. I'll have a look what I find nicer to read > >> if (iplb) { >> cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); >> env->regs[r1 + 1] = DIAG_308_RC_OK; >> } else { >> env->regs[r1 + 1] = DIAG_308_RC_NO_CONF; >> } >> - return; >> + break; >> + case DIAG308_PV_START: >> + iplb = s390_ipl_get_iplb_secure(); >> + if (!iplb || !iplb_valid_pv(iplb)) { >> + env->regs[r1 + 1] = 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; >
diff --git a/hw/s390x/ipl.c b/hw/s390x/ipl.c index 7773499d7f..db97a888ff 100644 --- a/hw/s390x/ipl.c +++ b/hw/s390x/ipl.c @@ -538,15 +538,56 @@ static bool is_virtio_scsi_device(IplParameterBlock *iplb) return is_virtio_ccw_device_of_type(iplb, VIRTIO_ID_SCSI); } +int s390_ipl_pv_check_components(IplParameterBlock *iplb) +{ + int i; + IPLBlockPV *ipib_pv = &iplb->pv; + + if (ipib_pv->num_comp == 0) { + return -EINVAL; + } + + for (i = 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 component */ + if (i < ipib_pv->num_comp - 1 && + ipib_pv->components[i].tweak_pref > + ipib_pv->components[i + 1].tweak_pref) { + return -EINVAL; + } + } + return 1; +} + void s390_ipl_update_diag308(IplParameterBlock *iplb) { S390IPLState *ipl = get_ipl_device(); - ipl->iplb = *iplb; - ipl->iplb_valid = true; + if (iplb->pbt == 5) { + ipl->iplb_pbt5 = *iplb; + ipl->iplb_valid_pbt5 = true; + } else { + ipl->iplb = *iplb; + ipl->iplb_valid = true; + } ipl->netboot = is_virtio_net_device(iplb); } +IplParameterBlock *s390_ipl_get_iplb_secure(void) +{ + S390IPLState *ipl = get_ipl_device(); + + if (!ipl->iplb_valid_pbt5) { + return NULL; + } + return &ipl->iplb_pbt5; +} + IplParameterBlock *s390_ipl_get_iplb(void) { S390IPLState *ipl = get_ipl_device(); @@ -561,7 +602,8 @@ void s390_ipl_reset_request(CPUState *cs, enum s390_reset reset_type) { S390IPLState *ipl = get_ipl_device(); - if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL) { + if (reset_type == S390_RESET_EXTERNAL || reset_type == S390_RESET_REIPL || + reset_type == S390_RESET_PV) { /* use CPU 0 for full resets */ ipl->reset_cpu_index = 0; } else { diff --git a/hw/s390x/ipl.h b/hw/s390x/ipl.h index d4813105db..d0b8d90fa4 100644 --- a/hw/s390x/ipl.h +++ b/hw/s390x/ipl.h @@ -15,6 +15,23 @@ #include "cpu.h" #include "hw/qdev-core.h" +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 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 +88,7 @@ union IplParameterBlock { union { IplBlockCcw ccw; IplBlockFcp fcp; + IPLBlockPV pv; IplBlockQemuScsi scsi; }; } QEMU_PACKED; @@ -84,9 +102,11 @@ union IplParameterBlock { typedef union IplParameterBlock IplParameterBlock; 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); enum s390_reset { /* default is a reset not triggered by a CPU e.g. issued by QMP */ @@ -94,6 +114,7 @@ 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 +154,7 @@ struct S390IPLState { /*< private >*/ DeviceState parent_obj; IplParameterBlock iplb; + IplParameterBlock iplb_pbt5; QemuIplParameters qipl; uint64_t start_addr; uint64_t compat_start_addr; @@ -140,6 +162,7 @@ struct S390IPLState { uint64_t compat_bios_start_addr; bool enforce_bios; bool iplb_valid; + bool iplb_valid_pbt5; bool netboot; /* reset related properties don't have to be migrated or reset */ enum s390_reset reset_type; @@ -161,9 +184,11 @@ QEMU_BUILD_BUG_MSG(offsetof(S390IPLState, iplb) & 3, "alignment of iplb wrong"); #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 #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 +210,10 @@ static inline bool iplb_valid_fcp(IplParameterBlock *iplb) iplb->pbt == S390_IPL_TYPE_FCP; } +static inline bool iplb_valid_pv(IplParameterBlock *iplb) +{ + return be32_to_cpu(iplb->len) >= S390_IPLB_MIN_PV_LEN && + iplb->pbt == S390_IPL_TYPE_PV; +} + #endif diff --git a/target/s390x/diag.c b/target/s390x/diag.c index b5aec06d6b..4ba6033609 100644 --- a/target/s390x/diag.c +++ b/target/s390x/diag.c @@ -52,6 +52,8 @@ 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 0x0a02 +#define DIAG_308_RC_INV_FOR_PV 0x0b02 #define DIAG308_RESET_MOD_CLR 0 #define DIAG308_RESET_LOAD_NORM 1 @@ -59,6 +61,9 @@ 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 static int diag308_parm_check(CPUS390XState *env, uint64_t r1, uint64_t addr, uintptr_t ra, bool write) @@ -105,6 +110,7 @@ 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 +123,8 @@ void handle_diag_308(CPUS390XState *env, uint64_t r1, uint64_t r3, uintptr_t ra) cpu_physical_memory_read(addr, iplb, be32_to_cpu(iplb->len)); - 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(iplb) >= 0)) { env->regs[r1 + 1] = DIAG_308_RC_INVALID; goto out; } @@ -128,17 +135,31 @@ out: g_free(iplb); return; case DIAG308_STORE: + case DIAG308_PV_STORE: if (diag308_parm_check(env, r1, addr, ra, true)) { return; } - iplb = s390_ipl_get_iplb(); + if (subcode == DIAG308_PV_STORE) { + iplb = s390_ipl_get_iplb_secure(); + } else { + iplb = s390_ipl_get_iplb(); + } if (iplb) { cpu_physical_memory_write(addr, iplb, be32_to_cpu(iplb->len)); env->regs[r1 + 1] = DIAG_308_RC_OK; } else { env->regs[r1 + 1] = DIAG_308_RC_NO_CONF; } - return; + break; + case DIAG308_PV_START: + iplb = s390_ipl_get_iplb_secure(); + if (!iplb || !iplb_valid_pv(iplb)) { + env->regs[r1 + 1] = 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;
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 <frankja@linux.ibm.com> --- hw/s390x/ipl.c | 48 ++++++++++++++++++++++++++++++++++++++++++--- hw/s390x/ipl.h | 31 +++++++++++++++++++++++++++++ target/s390x/diag.c | 27 ++++++++++++++++++++++--- 3 files changed, 100 insertions(+), 6 deletions(-)