| Message ID | 1513111443-22790-2-git-send-email-stefanb@linux.vnet.ibm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Dec 12, 2017 at 03:44:02PM -0500, Stefan Berger wrote: > Implement support for TPM on ppc64 by implementing the vTPM CRQ > interface as a frontend. It can use the tpm_emulator driver > backend with the external swtpm. > > The Linux vTPM driver for ppc64 works with this emulation. > > This TPM emulator also handles the TPM 2 case. > > Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> Sorry, this slipped through the cracks and I completely forgot about it for a very long time. I don't know enough about TPMs to review in detail, but nothing looks obviously bogus, so, Reviewed-by: David Gibson <david@gibson.dropbear.id.au> However, it looks like it will need a rebase against the current ppc-for-3.1 tree in order to be applied. > --- > hw/tpm/Makefile.objs | 1 + > hw/tpm/tpm_spapr.c | 382 +++++++++++++++++++++++++++++++++++++++++++++++++++ > include/sysemu/tpm.h | 3 + > qapi/tpm.json | 5 +- > 4 files changed, 389 insertions(+), 2 deletions(-) > create mode 100644 hw/tpm/tpm_spapr.c > > diff --git a/hw/tpm/Makefile.objs b/hw/tpm/Makefile.objs > index 41f0b7a..71ea63e 100644 > --- a/hw/tpm/Makefile.objs > +++ b/hw/tpm/Makefile.objs > @@ -1,3 +1,4 @@ > common-obj-$(CONFIG_TPM_TIS) += tpm_tis.o > common-obj-$(CONFIG_TPM_PASSTHROUGH) += tpm_passthrough.o tpm_util.o > common-obj-$(CONFIG_TPM_EMULATOR) += tpm_emulator.o tpm_util.o > +obj-$(CONFIG_PSERIES) += tpm_spapr.o > diff --git a/hw/tpm/tpm_spapr.c b/hw/tpm/tpm_spapr.c > new file mode 100644 > index 0000000..ef5e62d > --- /dev/null > +++ b/hw/tpm/tpm_spapr.c > @@ -0,0 +1,382 @@ > +/* > + * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator > + * > + * PAPR Virtual TPM > + * > + * Copyright (c) 2015, 2017 IBM Corporation. > + * > + * Authors: > + * Stefan Berger <stefanb@linux.vnet.ibm.com> > + * > + * This code is licensed under the GPL version 2 or later. See the > + * COPYING file in the top-level directory. > + * > + */ > + > +#include "qemu/osdep.h" > +#include "qemu/error-report.h" > +#include "qapi/error.h" > + > +#include "sysemu/tpm_backend.h" > +#include "tpm_int.h" > +#include "tpm_util.h" > + > +#include "hw/ppc/spapr.h" > +#include "hw/ppc/spapr_vio.h" > + > +#define DEBUG_SPAPR_VTPM 0 > + > +#define DPRINTF(fmt, ...) do { \ > + if (DEBUG_SPAPR_VTPM) { \ > + printf(fmt, ## __VA_ARGS__); \ > + } \ > +} while (0) > + > +#define VIO_SPAPR_VTPM(obj) \ > + OBJECT_CHECK(SPAPRvTPMState, (obj), TYPE_TPM_SPAPR) > + > +typedef struct VioCRQ { > + uint8_t valid; /* 0x80: cmd; 0xc0: init crq > + 0x81-0x83: CRQ message response */ > + uint8_t msg; /* see below */ > + uint16_t len; /* len of TPM request; len of TPM response */ > + uint32_t data; /* rtce_dma_handle when sending TPM request */ > + uint64_t reserved; > +} VioCRQ; > + > +typedef union TPMSpaprCRQ { > + VioCRQ s; > + uint8_t raw[sizeof(VioCRQ)]; > +} TPMSpaprCRQ; > + > +#define SPAPR_VTPM_VALID_INIT_CRQ_COMMAND 0xC0 > +#define SPAPR_VTPM_VALID_COMMAND 0x80 > +#define SPAPR_VTPM_MSG_RESULT 0x80 > + > +/* msg types for valid = SPAPR_VTPM_VALID_INIT_CRQ */ > +#define SPAPR_VTPM_INIT_CRQ_RESULT 0x1 > +#define SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT 0x2 > + > +/* msg types for valid = SPAPR_VTPM_VALID_CMD */ > +#define SPAPR_VTPM_GET_VERSION 0x1 > +#define SPAPR_VTPM_TPM_COMMAND 0x2 > +#define SPAPR_VTPM_GET_RTCE_BUFFER_SIZE 0x3 > +#define SPAPR_VTPM_PREPARE_TO_SUSPEND 0x4 > + > +/* response error messages */ > +#define SPAPR_VTPM_VTPM_ERROR 0xff > + > +/* error codes */ > +#define SPAPR_VTPM_ERR_COPY_IN_FAILED 0x3 > +#define SPAPR_VTPM_ERR_COPY_OUT_FAILED 0x4 > + > +#define MAX_BUFFER_SIZE TARGET_PAGE_SIZE > + > +typedef struct { > + VIOsPAPRDevice vdev; > + > + TPMSpaprCRQ crq; /* track single TPM command */ > + > + uint8_t state; > +#define SPAPR_VTPM_STATE_NONE 0 > +#define SPAPR_VTPM_STATE_EXECUTION 1 > +#define SPAPR_VTPM_STATE_COMPLETION 2 > + > + unsigned char buffer[MAX_BUFFER_SIZE]; > + > + TPMBackendCmd cmd; > + > + TPMBackend *be_driver; > + TPMVersion be_tpm_version; > + > + size_t be_buffer_size; > +} SPAPRvTPMState; > + > +static void tpm_spapr_show_buffer(const unsigned char *buffer, > + size_t buffer_len, const char *string) > +{ > +#if DEBUG_SPAPR_VTPM > + size_t i, len; > + > + len = MIN(tpm_cmd_get_size(buffer), buffer_len); > + printf("spapr_vtpm: %s length = %zu\n", string, len); > + for (i = 0; i < len; i++) { > + if (i && !(i % 16)) { > + printf("\n"); > + } > + printf("%.2X ", buffer[i]); > + } > + printf("\n"); > +#endif > +} > + > +/* > + * Send a request to the TPM. > + */ > +static void tpm_spapr_tpm_send(SPAPRvTPMState *s) > +{ > + tpm_spapr_show_buffer(s->buffer, sizeof(s->buffer), "spapr_vtpm: Tx TPM"); > + > + s->state = SPAPR_VTPM_STATE_EXECUTION; > + s->cmd = (TPMBackendCmd) { > + .locty = 0, > + .in = s->buffer, > + .in_len = MIN(tpm_cmd_get_size(s->buffer), sizeof(s->buffer)), > + .out = s->buffer, > + .out_len = sizeof(s->buffer), > + }; > + > + tpm_backend_deliver_request(s->be_driver, &s->cmd); > +} > + > +static int tpm_spapr_process_cmd(SPAPRvTPMState *s, uint64_t dataptr) > +{ > + long rc; > + > + /* a max. of be_buffer_size bytes can be transported */ > + rc = spapr_vio_dma_read(&s->vdev, dataptr, > + s->buffer, s->be_buffer_size); > + if (rc) { > + error_report("tpm_spapr_got_payload: DMA read failure !\n"); > + } else { > + /* let vTPM handle any malformed request */ > + tpm_spapr_tpm_send(s); > + } > + > + return rc; > +} > + > +static int tpm_spapr_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) > +{ > + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); > + TPMSpaprCRQ local_crq; > + TPMSpaprCRQ *crq = &s->crq; /* requests only */ > + int rc; > + > + memcpy(&local_crq.raw, crq_data, sizeof(local_crq.raw)); > + > + DPRINTF("VTPM: do_crq %02x %02x ...\n", > + local_crq.raw[0], local_crq.raw[1]); > + > + switch (local_crq.s.valid) { > + case SPAPR_VTPM_VALID_INIT_CRQ_COMMAND: /* Init command/response */ > + > + /* Respond to initialization request */ > + switch (local_crq.s.msg) { > + case SPAPR_VTPM_INIT_CRQ_RESULT: > + DPRINTF("vtpm_do_crq: SPAPR_VTPM_INIT_CRQ_RESULT\n"); > + memset(local_crq.raw, 0, sizeof(local_crq.raw)); > + local_crq.s.valid = SPAPR_VTPM_VALID_INIT_CRQ_COMMAND; > + local_crq.s.msg = SPAPR_VTPM_INIT_CRQ_RESULT; > + spapr_vio_send_crq(dev, local_crq.raw); > + break; > + > + case SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT: > + DPRINTF("vtpm_do_crq: SPAPR_VTPM_INIT_CRQ_COMP_RESULT\n"); > + memset(local_crq.raw, 0, sizeof(local_crq.raw)); > + local_crq.s.valid = SPAPR_VTPM_VALID_INIT_CRQ_COMMAND; > + local_crq.s.msg = SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT; > + spapr_vio_send_crq(dev, local_crq.raw); > + break; > + } > + > + break; > + case SPAPR_VTPM_VALID_COMMAND: /* Payloads */ > + switch (local_crq.s.msg) { > + case SPAPR_VTPM_TPM_COMMAND: > + DPRINTF("vtpm_do_crq: got TPM command payload!\n"); > + if (s->state == SPAPR_VTPM_STATE_EXECUTION) > + return H_BUSY; > + /* this crq is tracked */ > + memcpy(crq->raw, crq_data, sizeof(crq->raw)); > + > + rc = tpm_spapr_process_cmd(s, be32_to_cpu(crq->s.data)); > + > + if (rc == H_SUCCESS) { > + crq->s.valid = be16_to_cpu(0); > + } else { > + local_crq.s.valid = SPAPR_VTPM_MSG_RESULT; > + local_crq.s.msg = SPAPR_VTPM_VTPM_ERROR; > + local_crq.s.data = cpu_to_be32(SPAPR_VTPM_ERR_COPY_IN_FAILED); > + spapr_vio_send_crq(dev, local_crq.raw); > + } > + break; > + > + case SPAPR_VTPM_GET_RTCE_BUFFER_SIZE: > + DPRINTF("vtpm_do_crq: resp: buffer size is %zu\n", > + s->be_buffer_size); > + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; > + local_crq.s.len = cpu_to_be16(s->be_buffer_size); > + spapr_vio_send_crq(dev, local_crq.raw); > + break; > + > + case SPAPR_VTPM_GET_VERSION: > + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; > + local_crq.s.len = cpu_to_be16(0); > + switch (s->be_tpm_version) { > + case TPM_VERSION_UNSPEC: > + local_crq.s.data = cpu_to_be32(0); > + break; > + case TPM_VERSION_1_2: > + local_crq.s.data = cpu_to_be32(1); > + break; > + case TPM_VERSION_2_0: > + local_crq.s.data = cpu_to_be32(2); > + break; > + } > + DPRINTF("vtpm_do_crq: resp: version %u\n", > + local_crq.s.data); > + spapr_vio_send_crq(dev, local_crq.raw); > + break; > + > + case SPAPR_VTPM_PREPARE_TO_SUSPEND: > + DPRINTF("vtpm_do_crq: resp: prep to suspend\n"); > + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; > + spapr_vio_send_crq(dev, local_crq.raw); > + break; > + > + default: > + DPRINTF("vtpm_do_crq: Unknown message type %02x\n", > + crq->s.msg); > + } > + break; > + default: > + DPRINTF("vtpm_do_crq: unknown CRQ %02x %02x ...\n", > + local_crq.raw[0], local_crq.raw[1]); > + }; > + > + return H_SUCCESS; > +} > + > +static void tpm_spapr_request_completed(TPMIf *ti) > +{ > + SPAPRvTPMState *s = VIO_SPAPR_VTPM(ti); > + TPMSpaprCRQ *crq = &s->crq; > + uint32_t len; > + int rc; > + > + tpm_spapr_show_buffer(s->buffer, sizeof(s->buffer), "spapr_vtpm: Rx TPM"); > + > + s->state = SPAPR_VTPM_STATE_COMPLETION; > + > + /* a max. of be_buffer_size bytes can be transported */ > + len = MIN(tpm_cmd_get_size(s->buffer), s->be_buffer_size); > + rc = spapr_vio_dma_write(&s->vdev, be32_to_cpu(crq->s.data), > + s->buffer, len); > + > + crq->s.valid = SPAPR_VTPM_MSG_RESULT; > + if (rc == H_SUCCESS) { > + crq->s.msg = SPAPR_VTPM_TPM_COMMAND | SPAPR_VTPM_MSG_RESULT; > + crq->s.len = cpu_to_be16(len); > + } else { > + error_report("%s: DMA write failure\n", __func__); > + crq->s.msg = SPAPR_VTPM_VTPM_ERROR; > + crq->s.len = cpu_to_be16(0); > + crq->s.data = cpu_to_be32(SPAPR_VTPM_ERR_COPY_OUT_FAILED); > + } > + > + rc = spapr_vio_send_crq(&s->vdev, crq->raw); > + if (rc) { > + error_report("%s: Error sending response\n", __func__); > + } > +} > + > +static int tpm_spapr_do_startup_tpm(SPAPRvTPMState *s, size_t buffersize) > +{ > + return tpm_backend_startup_tpm(s->be_driver, buffersize); > +} > + > +static void tpm_spapr_reset(VIOsPAPRDevice *dev) > +{ > + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); > + > + s->state = SPAPR_VTPM_STATE_NONE; > + > + s->be_tpm_version = tpm_backend_get_tpm_version(s->be_driver); > + > + s->be_buffer_size = MAX(ROUND_UP(tpm_backend_get_buffer_size(s->be_driver), > + TARGET_PAGE_SIZE), > + sizeof(s->buffer)); > + > + tpm_backend_reset(s->be_driver); > + tpm_spapr_do_startup_tpm(s, s->be_buffer_size); > +} > + > +static enum TPMVersion tpm_spapr_get_version(TPMIf *ti) > +{ > + SPAPRvTPMState *s = VIO_SPAPR_VTPM(ti); > + > + if (tpm_backend_had_startup_error(s->be_driver)) { > + return TPM_VERSION_UNSPEC; > + } > + > + return tpm_backend_get_tpm_version(s->be_driver); > +} > + > +static const VMStateDescription vmstate_spapr_vtpm = { > + .name = "tpm_spapr", > + .unmigratable = 1, > +}; > + > +static Property tpm_spapr_properties[] = { > + DEFINE_SPAPR_PROPERTIES(SPAPRvTPMState, vdev), > + DEFINE_PROP_TPMBE("tpmdev", SPAPRvTPMState, be_driver), > + DEFINE_PROP_END_OF_LIST(), > +}; > + > +static void tpm_spapr_realizefn(VIOsPAPRDevice *dev, Error **errp) > +{ > + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); > + > + if (!tpm_find()) { > + error_setg(errp, "at most one TPM device is permitted"); > + return; > + } > + > + dev->crq.SendFunc = tpm_spapr_do_crq; > + > + if (!s->be_driver) { > + error_setg(errp, "'tpmdev' property is required"); > + return; > + } > +} > + > +static void tpm_spapr_class_init(ObjectClass *klass, void *data) > +{ > + DeviceClass *dc = DEVICE_CLASS(klass); > + VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); > + TPMIfClass *tc = TPM_IF_CLASS(klass); > + > + k->realize = tpm_spapr_realizefn; > + k->reset = tpm_spapr_reset; > + k->dt_name = "vtpm"; > + k->dt_type = "IBM,vtpm"; > + k->dt_compatible = "IBM,vtpm"; > + k->signal_mask = 0x00000001; > + set_bit(DEVICE_CATEGORY_MISC, dc->categories); > + dc->props = tpm_spapr_properties; > + k->rtce_window_size = 0x10000000; > + dc->vmsd = &vmstate_spapr_vtpm; > + > + tc->model = TPM_MODEL_TPM_SPAPR; > + tc->get_version = tpm_spapr_get_version; > + tc->request_completed = tpm_spapr_request_completed; > +} > + > +static const TypeInfo tpm_spapr_info = { > + .name = TYPE_TPM_SPAPR, > + .parent = TYPE_VIO_SPAPR_DEVICE, > + .instance_size = sizeof(SPAPRvTPMState), > + .class_init = tpm_spapr_class_init, > + .interfaces = (InterfaceInfo[]) { > + { TYPE_TPM_IF }, > + { } > + } > +}; > + > +static void tpm_spapr_register_types(void) > +{ > + type_register_static(&tpm_spapr_info); > +} > + > +type_init(tpm_spapr_register_types) > diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h > index 852e026..afefadd 100644 > --- a/include/sysemu/tpm.h > +++ b/include/sysemu/tpm.h > @@ -46,9 +46,12 @@ typedef struct TPMIfClass { > } TPMIfClass; > > #define TYPE_TPM_TIS "tpm-tis" > +#define TYPE_TPM_SPAPR "tpm-spapr" > > #define TPM_IS_TIS(chr) \ > object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS) > +#define TPM_IS_SPAPR(chr) \ > + object_dynamic_cast(OBJECT(chr), TYPE_TPM_SPAPR) > > /* returns NULL unless there is exactly one TPM device */ > static inline TPMIf *tpm_find(void) > diff --git a/qapi/tpm.json b/qapi/tpm.json > index 7093f26..dfa6a32 100644 > --- a/qapi/tpm.json > +++ b/qapi/tpm.json > @@ -11,10 +11,11 @@ > # An enumeration of TPM models > # > # @tpm-tis: TPM TIS model > +# @tpm-spapr: TPM PAPR model (since 2.12) > # > # Since: 1.5 > ## > -{ 'enum': 'TpmModel', 'data': [ 'tpm-tis' ] } > +{ 'enum': 'TpmModel', 'data': [ 'tpm-tis', 'tpm-spapr' ] } > > ## > # @query-tpm-models: > @@ -28,7 +29,7 @@ > # Example: > # > # -> { "execute": "query-tpm-models" } > -# <- { "return": [ "tpm-tis" ] } > +# <- { "return": [ "tpm-tis", "tpm-spapr" ] } > # > ## > { 'command': 'query-tpm-models', 'returns': ['TpmModel'] }
On 07/26/2018 01:26 AM, David Gibson wrote: > On Tue, Dec 12, 2017 at 03:44:02PM -0500, Stefan Berger wrote: >> Implement support for TPM on ppc64 by implementing the vTPM CRQ >> interface as a frontend. It can use the tpm_emulator driver >> backend with the external swtpm. >> >> The Linux vTPM driver for ppc64 works with this emulation. >> >> This TPM emulator also handles the TPM 2 case. >> >> Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> > Sorry, this slipped through the cracks and I completely forgot about > it for a very long time. I don't know enough about TPMs to review in > detail, but nothing looks obviously bogus, so, > > Reviewed-by: David Gibson <david@gibson.dropbear.id.au> > > However, it looks like it will need a rebase against the current > ppc-for-3.1 tree in order to be applied. Thanks a lot for the review. I have to see what I will do with it now since it requires a lot of extensions to the SLOF firmware as well... Stefan > >> --- >> hw/tpm/Makefile.objs | 1 + >> hw/tpm/tpm_spapr.c | 382 +++++++++++++++++++++++++++++++++++++++++++++++++++ >> include/sysemu/tpm.h | 3 + >> qapi/tpm.json | 5 +- >> 4 files changed, 389 insertions(+), 2 deletions(-) >> create mode 100644 hw/tpm/tpm_spapr.c >> >> diff --git a/hw/tpm/Makefile.objs b/hw/tpm/Makefile.objs >> index 41f0b7a..71ea63e 100644 >> --- a/hw/tpm/Makefile.objs >> +++ b/hw/tpm/Makefile.objs >> @@ -1,3 +1,4 @@ >> common-obj-$(CONFIG_TPM_TIS) += tpm_tis.o >> common-obj-$(CONFIG_TPM_PASSTHROUGH) += tpm_passthrough.o tpm_util.o >> common-obj-$(CONFIG_TPM_EMULATOR) += tpm_emulator.o tpm_util.o >> +obj-$(CONFIG_PSERIES) += tpm_spapr.o >> diff --git a/hw/tpm/tpm_spapr.c b/hw/tpm/tpm_spapr.c >> new file mode 100644 >> index 0000000..ef5e62d >> --- /dev/null >> +++ b/hw/tpm/tpm_spapr.c >> @@ -0,0 +1,382 @@ >> +/* >> + * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator >> + * >> + * PAPR Virtual TPM >> + * >> + * Copyright (c) 2015, 2017 IBM Corporation. >> + * >> + * Authors: >> + * Stefan Berger <stefanb@linux.vnet.ibm.com> >> + * >> + * This code is licensed under the GPL version 2 or later. See the >> + * COPYING file in the top-level directory. >> + * >> + */ >> + >> +#include "qemu/osdep.h" >> +#include "qemu/error-report.h" >> +#include "qapi/error.h" >> + >> +#include "sysemu/tpm_backend.h" >> +#include "tpm_int.h" >> +#include "tpm_util.h" >> + >> +#include "hw/ppc/spapr.h" >> +#include "hw/ppc/spapr_vio.h" >> + >> +#define DEBUG_SPAPR_VTPM 0 >> + >> +#define DPRINTF(fmt, ...) do { \ >> + if (DEBUG_SPAPR_VTPM) { \ >> + printf(fmt, ## __VA_ARGS__); \ >> + } \ >> +} while (0) >> + >> +#define VIO_SPAPR_VTPM(obj) \ >> + OBJECT_CHECK(SPAPRvTPMState, (obj), TYPE_TPM_SPAPR) >> + >> +typedef struct VioCRQ { >> + uint8_t valid; /* 0x80: cmd; 0xc0: init crq >> + 0x81-0x83: CRQ message response */ >> + uint8_t msg; /* see below */ >> + uint16_t len; /* len of TPM request; len of TPM response */ >> + uint32_t data; /* rtce_dma_handle when sending TPM request */ >> + uint64_t reserved; >> +} VioCRQ; >> + >> +typedef union TPMSpaprCRQ { >> + VioCRQ s; >> + uint8_t raw[sizeof(VioCRQ)]; >> +} TPMSpaprCRQ; >> + >> +#define SPAPR_VTPM_VALID_INIT_CRQ_COMMAND 0xC0 >> +#define SPAPR_VTPM_VALID_COMMAND 0x80 >> +#define SPAPR_VTPM_MSG_RESULT 0x80 >> + >> +/* msg types for valid = SPAPR_VTPM_VALID_INIT_CRQ */ >> +#define SPAPR_VTPM_INIT_CRQ_RESULT 0x1 >> +#define SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT 0x2 >> + >> +/* msg types for valid = SPAPR_VTPM_VALID_CMD */ >> +#define SPAPR_VTPM_GET_VERSION 0x1 >> +#define SPAPR_VTPM_TPM_COMMAND 0x2 >> +#define SPAPR_VTPM_GET_RTCE_BUFFER_SIZE 0x3 >> +#define SPAPR_VTPM_PREPARE_TO_SUSPEND 0x4 >> + >> +/* response error messages */ >> +#define SPAPR_VTPM_VTPM_ERROR 0xff >> + >> +/* error codes */ >> +#define SPAPR_VTPM_ERR_COPY_IN_FAILED 0x3 >> +#define SPAPR_VTPM_ERR_COPY_OUT_FAILED 0x4 >> + >> +#define MAX_BUFFER_SIZE TARGET_PAGE_SIZE >> + >> +typedef struct { >> + VIOsPAPRDevice vdev; >> + >> + TPMSpaprCRQ crq; /* track single TPM command */ >> + >> + uint8_t state; >> +#define SPAPR_VTPM_STATE_NONE 0 >> +#define SPAPR_VTPM_STATE_EXECUTION 1 >> +#define SPAPR_VTPM_STATE_COMPLETION 2 >> + >> + unsigned char buffer[MAX_BUFFER_SIZE]; >> + >> + TPMBackendCmd cmd; >> + >> + TPMBackend *be_driver; >> + TPMVersion be_tpm_version; >> + >> + size_t be_buffer_size; >> +} SPAPRvTPMState; >> + >> +static void tpm_spapr_show_buffer(const unsigned char *buffer, >> + size_t buffer_len, const char *string) >> +{ >> +#if DEBUG_SPAPR_VTPM >> + size_t i, len; >> + >> + len = MIN(tpm_cmd_get_size(buffer), buffer_len); >> + printf("spapr_vtpm: %s length = %zu\n", string, len); >> + for (i = 0; i < len; i++) { >> + if (i && !(i % 16)) { >> + printf("\n"); >> + } >> + printf("%.2X ", buffer[i]); >> + } >> + printf("\n"); >> +#endif >> +} >> + >> +/* >> + * Send a request to the TPM. >> + */ >> +static void tpm_spapr_tpm_send(SPAPRvTPMState *s) >> +{ >> + tpm_spapr_show_buffer(s->buffer, sizeof(s->buffer), "spapr_vtpm: Tx TPM"); >> + >> + s->state = SPAPR_VTPM_STATE_EXECUTION; >> + s->cmd = (TPMBackendCmd) { >> + .locty = 0, >> + .in = s->buffer, >> + .in_len = MIN(tpm_cmd_get_size(s->buffer), sizeof(s->buffer)), >> + .out = s->buffer, >> + .out_len = sizeof(s->buffer), >> + }; >> + >> + tpm_backend_deliver_request(s->be_driver, &s->cmd); >> +} >> + >> +static int tpm_spapr_process_cmd(SPAPRvTPMState *s, uint64_t dataptr) >> +{ >> + long rc; >> + >> + /* a max. of be_buffer_size bytes can be transported */ >> + rc = spapr_vio_dma_read(&s->vdev, dataptr, >> + s->buffer, s->be_buffer_size); >> + if (rc) { >> + error_report("tpm_spapr_got_payload: DMA read failure !\n"); >> + } else { >> + /* let vTPM handle any malformed request */ >> + tpm_spapr_tpm_send(s); >> + } >> + >> + return rc; >> +} >> + >> +static int tpm_spapr_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) >> +{ >> + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); >> + TPMSpaprCRQ local_crq; >> + TPMSpaprCRQ *crq = &s->crq; /* requests only */ >> + int rc; >> + >> + memcpy(&local_crq.raw, crq_data, sizeof(local_crq.raw)); >> + >> + DPRINTF("VTPM: do_crq %02x %02x ...\n", >> + local_crq.raw[0], local_crq.raw[1]); >> + >> + switch (local_crq.s.valid) { >> + case SPAPR_VTPM_VALID_INIT_CRQ_COMMAND: /* Init command/response */ >> + >> + /* Respond to initialization request */ >> + switch (local_crq.s.msg) { >> + case SPAPR_VTPM_INIT_CRQ_RESULT: >> + DPRINTF("vtpm_do_crq: SPAPR_VTPM_INIT_CRQ_RESULT\n"); >> + memset(local_crq.raw, 0, sizeof(local_crq.raw)); >> + local_crq.s.valid = SPAPR_VTPM_VALID_INIT_CRQ_COMMAND; >> + local_crq.s.msg = SPAPR_VTPM_INIT_CRQ_RESULT; >> + spapr_vio_send_crq(dev, local_crq.raw); >> + break; >> + >> + case SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT: >> + DPRINTF("vtpm_do_crq: SPAPR_VTPM_INIT_CRQ_COMP_RESULT\n"); >> + memset(local_crq.raw, 0, sizeof(local_crq.raw)); >> + local_crq.s.valid = SPAPR_VTPM_VALID_INIT_CRQ_COMMAND; >> + local_crq.s.msg = SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT; >> + spapr_vio_send_crq(dev, local_crq.raw); >> + break; >> + } >> + >> + break; >> + case SPAPR_VTPM_VALID_COMMAND: /* Payloads */ >> + switch (local_crq.s.msg) { >> + case SPAPR_VTPM_TPM_COMMAND: >> + DPRINTF("vtpm_do_crq: got TPM command payload!\n"); >> + if (s->state == SPAPR_VTPM_STATE_EXECUTION) >> + return H_BUSY; >> + /* this crq is tracked */ >> + memcpy(crq->raw, crq_data, sizeof(crq->raw)); >> + >> + rc = tpm_spapr_process_cmd(s, be32_to_cpu(crq->s.data)); >> + >> + if (rc == H_SUCCESS) { >> + crq->s.valid = be16_to_cpu(0); >> + } else { >> + local_crq.s.valid = SPAPR_VTPM_MSG_RESULT; >> + local_crq.s.msg = SPAPR_VTPM_VTPM_ERROR; >> + local_crq.s.data = cpu_to_be32(SPAPR_VTPM_ERR_COPY_IN_FAILED); >> + spapr_vio_send_crq(dev, local_crq.raw); >> + } >> + break; >> + >> + case SPAPR_VTPM_GET_RTCE_BUFFER_SIZE: >> + DPRINTF("vtpm_do_crq: resp: buffer size is %zu\n", >> + s->be_buffer_size); >> + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; >> + local_crq.s.len = cpu_to_be16(s->be_buffer_size); >> + spapr_vio_send_crq(dev, local_crq.raw); >> + break; >> + >> + case SPAPR_VTPM_GET_VERSION: >> + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; >> + local_crq.s.len = cpu_to_be16(0); >> + switch (s->be_tpm_version) { >> + case TPM_VERSION_UNSPEC: >> + local_crq.s.data = cpu_to_be32(0); >> + break; >> + case TPM_VERSION_1_2: >> + local_crq.s.data = cpu_to_be32(1); >> + break; >> + case TPM_VERSION_2_0: >> + local_crq.s.data = cpu_to_be32(2); >> + break; >> + } >> + DPRINTF("vtpm_do_crq: resp: version %u\n", >> + local_crq.s.data); >> + spapr_vio_send_crq(dev, local_crq.raw); >> + break; >> + >> + case SPAPR_VTPM_PREPARE_TO_SUSPEND: >> + DPRINTF("vtpm_do_crq: resp: prep to suspend\n"); >> + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; >> + spapr_vio_send_crq(dev, local_crq.raw); >> + break; >> + >> + default: >> + DPRINTF("vtpm_do_crq: Unknown message type %02x\n", >> + crq->s.msg); >> + } >> + break; >> + default: >> + DPRINTF("vtpm_do_crq: unknown CRQ %02x %02x ...\n", >> + local_crq.raw[0], local_crq.raw[1]); >> + }; >> + >> + return H_SUCCESS; >> +} >> + >> +static void tpm_spapr_request_completed(TPMIf *ti) >> +{ >> + SPAPRvTPMState *s = VIO_SPAPR_VTPM(ti); >> + TPMSpaprCRQ *crq = &s->crq; >> + uint32_t len; >> + int rc; >> + >> + tpm_spapr_show_buffer(s->buffer, sizeof(s->buffer), "spapr_vtpm: Rx TPM"); >> + >> + s->state = SPAPR_VTPM_STATE_COMPLETION; >> + >> + /* a max. of be_buffer_size bytes can be transported */ >> + len = MIN(tpm_cmd_get_size(s->buffer), s->be_buffer_size); >> + rc = spapr_vio_dma_write(&s->vdev, be32_to_cpu(crq->s.data), >> + s->buffer, len); >> + >> + crq->s.valid = SPAPR_VTPM_MSG_RESULT; >> + if (rc == H_SUCCESS) { >> + crq->s.msg = SPAPR_VTPM_TPM_COMMAND | SPAPR_VTPM_MSG_RESULT; >> + crq->s.len = cpu_to_be16(len); >> + } else { >> + error_report("%s: DMA write failure\n", __func__); >> + crq->s.msg = SPAPR_VTPM_VTPM_ERROR; >> + crq->s.len = cpu_to_be16(0); >> + crq->s.data = cpu_to_be32(SPAPR_VTPM_ERR_COPY_OUT_FAILED); >> + } >> + >> + rc = spapr_vio_send_crq(&s->vdev, crq->raw); >> + if (rc) { >> + error_report("%s: Error sending response\n", __func__); >> + } >> +} >> + >> +static int tpm_spapr_do_startup_tpm(SPAPRvTPMState *s, size_t buffersize) >> +{ >> + return tpm_backend_startup_tpm(s->be_driver, buffersize); >> +} >> + >> +static void tpm_spapr_reset(VIOsPAPRDevice *dev) >> +{ >> + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); >> + >> + s->state = SPAPR_VTPM_STATE_NONE; >> + >> + s->be_tpm_version = tpm_backend_get_tpm_version(s->be_driver); >> + >> + s->be_buffer_size = MAX(ROUND_UP(tpm_backend_get_buffer_size(s->be_driver), >> + TARGET_PAGE_SIZE), >> + sizeof(s->buffer)); >> + >> + tpm_backend_reset(s->be_driver); >> + tpm_spapr_do_startup_tpm(s, s->be_buffer_size); >> +} >> + >> +static enum TPMVersion tpm_spapr_get_version(TPMIf *ti) >> +{ >> + SPAPRvTPMState *s = VIO_SPAPR_VTPM(ti); >> + >> + if (tpm_backend_had_startup_error(s->be_driver)) { >> + return TPM_VERSION_UNSPEC; >> + } >> + >> + return tpm_backend_get_tpm_version(s->be_driver); >> +} >> + >> +static const VMStateDescription vmstate_spapr_vtpm = { >> + .name = "tpm_spapr", >> + .unmigratable = 1, >> +}; >> + >> +static Property tpm_spapr_properties[] = { >> + DEFINE_SPAPR_PROPERTIES(SPAPRvTPMState, vdev), >> + DEFINE_PROP_TPMBE("tpmdev", SPAPRvTPMState, be_driver), >> + DEFINE_PROP_END_OF_LIST(), >> +}; >> + >> +static void tpm_spapr_realizefn(VIOsPAPRDevice *dev, Error **errp) >> +{ >> + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); >> + >> + if (!tpm_find()) { >> + error_setg(errp, "at most one TPM device is permitted"); >> + return; >> + } >> + >> + dev->crq.SendFunc = tpm_spapr_do_crq; >> + >> + if (!s->be_driver) { >> + error_setg(errp, "'tpmdev' property is required"); >> + return; >> + } >> +} >> + >> +static void tpm_spapr_class_init(ObjectClass *klass, void *data) >> +{ >> + DeviceClass *dc = DEVICE_CLASS(klass); >> + VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); >> + TPMIfClass *tc = TPM_IF_CLASS(klass); >> + >> + k->realize = tpm_spapr_realizefn; >> + k->reset = tpm_spapr_reset; >> + k->dt_name = "vtpm"; >> + k->dt_type = "IBM,vtpm"; >> + k->dt_compatible = "IBM,vtpm"; >> + k->signal_mask = 0x00000001; >> + set_bit(DEVICE_CATEGORY_MISC, dc->categories); >> + dc->props = tpm_spapr_properties; >> + k->rtce_window_size = 0x10000000; >> + dc->vmsd = &vmstate_spapr_vtpm; >> + >> + tc->model = TPM_MODEL_TPM_SPAPR; >> + tc->get_version = tpm_spapr_get_version; >> + tc->request_completed = tpm_spapr_request_completed; >> +} >> + >> +static const TypeInfo tpm_spapr_info = { >> + .name = TYPE_TPM_SPAPR, >> + .parent = TYPE_VIO_SPAPR_DEVICE, >> + .instance_size = sizeof(SPAPRvTPMState), >> + .class_init = tpm_spapr_class_init, >> + .interfaces = (InterfaceInfo[]) { >> + { TYPE_TPM_IF }, >> + { } >> + } >> +}; >> + >> +static void tpm_spapr_register_types(void) >> +{ >> + type_register_static(&tpm_spapr_info); >> +} >> + >> +type_init(tpm_spapr_register_types) >> diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h >> index 852e026..afefadd 100644 >> --- a/include/sysemu/tpm.h >> +++ b/include/sysemu/tpm.h >> @@ -46,9 +46,12 @@ typedef struct TPMIfClass { >> } TPMIfClass; >> >> #define TYPE_TPM_TIS "tpm-tis" >> +#define TYPE_TPM_SPAPR "tpm-spapr" >> >> #define TPM_IS_TIS(chr) \ >> object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS) >> +#define TPM_IS_SPAPR(chr) \ >> + object_dynamic_cast(OBJECT(chr), TYPE_TPM_SPAPR) >> >> /* returns NULL unless there is exactly one TPM device */ >> static inline TPMIf *tpm_find(void) >> diff --git a/qapi/tpm.json b/qapi/tpm.json >> index 7093f26..dfa6a32 100644 >> --- a/qapi/tpm.json >> +++ b/qapi/tpm.json >> @@ -11,10 +11,11 @@ >> # An enumeration of TPM models >> # >> # @tpm-tis: TPM TIS model >> +# @tpm-spapr: TPM PAPR model (since 2.12) >> # >> # Since: 1.5 >> ## >> -{ 'enum': 'TpmModel', 'data': [ 'tpm-tis' ] } >> +{ 'enum': 'TpmModel', 'data': [ 'tpm-tis', 'tpm-spapr' ] } >> >> ## >> # @query-tpm-models: >> @@ -28,7 +29,7 @@ >> # Example: >> # >> # -> { "execute": "query-tpm-models" } >> -# <- { "return": [ "tpm-tis" ] } >> +# <- { "return": [ "tpm-tis", "tpm-spapr" ] } >> # >> ## >> { 'command': 'query-tpm-models', 'returns': ['TpmModel'] }
diff --git a/hw/tpm/Makefile.objs b/hw/tpm/Makefile.objs index 41f0b7a..71ea63e 100644 --- a/hw/tpm/Makefile.objs +++ b/hw/tpm/Makefile.objs @@ -1,3 +1,4 @@ common-obj-$(CONFIG_TPM_TIS) += tpm_tis.o common-obj-$(CONFIG_TPM_PASSTHROUGH) += tpm_passthrough.o tpm_util.o common-obj-$(CONFIG_TPM_EMULATOR) += tpm_emulator.o tpm_util.o +obj-$(CONFIG_PSERIES) += tpm_spapr.o diff --git a/hw/tpm/tpm_spapr.c b/hw/tpm/tpm_spapr.c new file mode 100644 index 0000000..ef5e62d --- /dev/null +++ b/hw/tpm/tpm_spapr.c @@ -0,0 +1,382 @@ +/* + * QEMU PowerPC pSeries Logical Partition (aka sPAPR) hardware System Emulator + * + * PAPR Virtual TPM + * + * Copyright (c) 2015, 2017 IBM Corporation. + * + * Authors: + * Stefan Berger <stefanb@linux.vnet.ibm.com> + * + * This code is licensed under the GPL version 2 or later. See the + * COPYING file in the top-level directory. + * + */ + +#include "qemu/osdep.h" +#include "qemu/error-report.h" +#include "qapi/error.h" + +#include "sysemu/tpm_backend.h" +#include "tpm_int.h" +#include "tpm_util.h" + +#include "hw/ppc/spapr.h" +#include "hw/ppc/spapr_vio.h" + +#define DEBUG_SPAPR_VTPM 0 + +#define DPRINTF(fmt, ...) do { \ + if (DEBUG_SPAPR_VTPM) { \ + printf(fmt, ## __VA_ARGS__); \ + } \ +} while (0) + +#define VIO_SPAPR_VTPM(obj) \ + OBJECT_CHECK(SPAPRvTPMState, (obj), TYPE_TPM_SPAPR) + +typedef struct VioCRQ { + uint8_t valid; /* 0x80: cmd; 0xc0: init crq + 0x81-0x83: CRQ message response */ + uint8_t msg; /* see below */ + uint16_t len; /* len of TPM request; len of TPM response */ + uint32_t data; /* rtce_dma_handle when sending TPM request */ + uint64_t reserved; +} VioCRQ; + +typedef union TPMSpaprCRQ { + VioCRQ s; + uint8_t raw[sizeof(VioCRQ)]; +} TPMSpaprCRQ; + +#define SPAPR_VTPM_VALID_INIT_CRQ_COMMAND 0xC0 +#define SPAPR_VTPM_VALID_COMMAND 0x80 +#define SPAPR_VTPM_MSG_RESULT 0x80 + +/* msg types for valid = SPAPR_VTPM_VALID_INIT_CRQ */ +#define SPAPR_VTPM_INIT_CRQ_RESULT 0x1 +#define SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT 0x2 + +/* msg types for valid = SPAPR_VTPM_VALID_CMD */ +#define SPAPR_VTPM_GET_VERSION 0x1 +#define SPAPR_VTPM_TPM_COMMAND 0x2 +#define SPAPR_VTPM_GET_RTCE_BUFFER_SIZE 0x3 +#define SPAPR_VTPM_PREPARE_TO_SUSPEND 0x4 + +/* response error messages */ +#define SPAPR_VTPM_VTPM_ERROR 0xff + +/* error codes */ +#define SPAPR_VTPM_ERR_COPY_IN_FAILED 0x3 +#define SPAPR_VTPM_ERR_COPY_OUT_FAILED 0x4 + +#define MAX_BUFFER_SIZE TARGET_PAGE_SIZE + +typedef struct { + VIOsPAPRDevice vdev; + + TPMSpaprCRQ crq; /* track single TPM command */ + + uint8_t state; +#define SPAPR_VTPM_STATE_NONE 0 +#define SPAPR_VTPM_STATE_EXECUTION 1 +#define SPAPR_VTPM_STATE_COMPLETION 2 + + unsigned char buffer[MAX_BUFFER_SIZE]; + + TPMBackendCmd cmd; + + TPMBackend *be_driver; + TPMVersion be_tpm_version; + + size_t be_buffer_size; +} SPAPRvTPMState; + +static void tpm_spapr_show_buffer(const unsigned char *buffer, + size_t buffer_len, const char *string) +{ +#if DEBUG_SPAPR_VTPM + size_t i, len; + + len = MIN(tpm_cmd_get_size(buffer), buffer_len); + printf("spapr_vtpm: %s length = %zu\n", string, len); + for (i = 0; i < len; i++) { + if (i && !(i % 16)) { + printf("\n"); + } + printf("%.2X ", buffer[i]); + } + printf("\n"); +#endif +} + +/* + * Send a request to the TPM. + */ +static void tpm_spapr_tpm_send(SPAPRvTPMState *s) +{ + tpm_spapr_show_buffer(s->buffer, sizeof(s->buffer), "spapr_vtpm: Tx TPM"); + + s->state = SPAPR_VTPM_STATE_EXECUTION; + s->cmd = (TPMBackendCmd) { + .locty = 0, + .in = s->buffer, + .in_len = MIN(tpm_cmd_get_size(s->buffer), sizeof(s->buffer)), + .out = s->buffer, + .out_len = sizeof(s->buffer), + }; + + tpm_backend_deliver_request(s->be_driver, &s->cmd); +} + +static int tpm_spapr_process_cmd(SPAPRvTPMState *s, uint64_t dataptr) +{ + long rc; + + /* a max. of be_buffer_size bytes can be transported */ + rc = spapr_vio_dma_read(&s->vdev, dataptr, + s->buffer, s->be_buffer_size); + if (rc) { + error_report("tpm_spapr_got_payload: DMA read failure !\n"); + } else { + /* let vTPM handle any malformed request */ + tpm_spapr_tpm_send(s); + } + + return rc; +} + +static int tpm_spapr_do_crq(struct VIOsPAPRDevice *dev, uint8_t *crq_data) +{ + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); + TPMSpaprCRQ local_crq; + TPMSpaprCRQ *crq = &s->crq; /* requests only */ + int rc; + + memcpy(&local_crq.raw, crq_data, sizeof(local_crq.raw)); + + DPRINTF("VTPM: do_crq %02x %02x ...\n", + local_crq.raw[0], local_crq.raw[1]); + + switch (local_crq.s.valid) { + case SPAPR_VTPM_VALID_INIT_CRQ_COMMAND: /* Init command/response */ + + /* Respond to initialization request */ + switch (local_crq.s.msg) { + case SPAPR_VTPM_INIT_CRQ_RESULT: + DPRINTF("vtpm_do_crq: SPAPR_VTPM_INIT_CRQ_RESULT\n"); + memset(local_crq.raw, 0, sizeof(local_crq.raw)); + local_crq.s.valid = SPAPR_VTPM_VALID_INIT_CRQ_COMMAND; + local_crq.s.msg = SPAPR_VTPM_INIT_CRQ_RESULT; + spapr_vio_send_crq(dev, local_crq.raw); + break; + + case SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT: + DPRINTF("vtpm_do_crq: SPAPR_VTPM_INIT_CRQ_COMP_RESULT\n"); + memset(local_crq.raw, 0, sizeof(local_crq.raw)); + local_crq.s.valid = SPAPR_VTPM_VALID_INIT_CRQ_COMMAND; + local_crq.s.msg = SPAPR_VTPM_INIT_CRQ_COMPLETE_RESULT; + spapr_vio_send_crq(dev, local_crq.raw); + break; + } + + break; + case SPAPR_VTPM_VALID_COMMAND: /* Payloads */ + switch (local_crq.s.msg) { + case SPAPR_VTPM_TPM_COMMAND: + DPRINTF("vtpm_do_crq: got TPM command payload!\n"); + if (s->state == SPAPR_VTPM_STATE_EXECUTION) + return H_BUSY; + /* this crq is tracked */ + memcpy(crq->raw, crq_data, sizeof(crq->raw)); + + rc = tpm_spapr_process_cmd(s, be32_to_cpu(crq->s.data)); + + if (rc == H_SUCCESS) { + crq->s.valid = be16_to_cpu(0); + } else { + local_crq.s.valid = SPAPR_VTPM_MSG_RESULT; + local_crq.s.msg = SPAPR_VTPM_VTPM_ERROR; + local_crq.s.data = cpu_to_be32(SPAPR_VTPM_ERR_COPY_IN_FAILED); + spapr_vio_send_crq(dev, local_crq.raw); + } + break; + + case SPAPR_VTPM_GET_RTCE_BUFFER_SIZE: + DPRINTF("vtpm_do_crq: resp: buffer size is %zu\n", + s->be_buffer_size); + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; + local_crq.s.len = cpu_to_be16(s->be_buffer_size); + spapr_vio_send_crq(dev, local_crq.raw); + break; + + case SPAPR_VTPM_GET_VERSION: + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; + local_crq.s.len = cpu_to_be16(0); + switch (s->be_tpm_version) { + case TPM_VERSION_UNSPEC: + local_crq.s.data = cpu_to_be32(0); + break; + case TPM_VERSION_1_2: + local_crq.s.data = cpu_to_be32(1); + break; + case TPM_VERSION_2_0: + local_crq.s.data = cpu_to_be32(2); + break; + } + DPRINTF("vtpm_do_crq: resp: version %u\n", + local_crq.s.data); + spapr_vio_send_crq(dev, local_crq.raw); + break; + + case SPAPR_VTPM_PREPARE_TO_SUSPEND: + DPRINTF("vtpm_do_crq: resp: prep to suspend\n"); + local_crq.s.msg |= SPAPR_VTPM_MSG_RESULT; + spapr_vio_send_crq(dev, local_crq.raw); + break; + + default: + DPRINTF("vtpm_do_crq: Unknown message type %02x\n", + crq->s.msg); + } + break; + default: + DPRINTF("vtpm_do_crq: unknown CRQ %02x %02x ...\n", + local_crq.raw[0], local_crq.raw[1]); + }; + + return H_SUCCESS; +} + +static void tpm_spapr_request_completed(TPMIf *ti) +{ + SPAPRvTPMState *s = VIO_SPAPR_VTPM(ti); + TPMSpaprCRQ *crq = &s->crq; + uint32_t len; + int rc; + + tpm_spapr_show_buffer(s->buffer, sizeof(s->buffer), "spapr_vtpm: Rx TPM"); + + s->state = SPAPR_VTPM_STATE_COMPLETION; + + /* a max. of be_buffer_size bytes can be transported */ + len = MIN(tpm_cmd_get_size(s->buffer), s->be_buffer_size); + rc = spapr_vio_dma_write(&s->vdev, be32_to_cpu(crq->s.data), + s->buffer, len); + + crq->s.valid = SPAPR_VTPM_MSG_RESULT; + if (rc == H_SUCCESS) { + crq->s.msg = SPAPR_VTPM_TPM_COMMAND | SPAPR_VTPM_MSG_RESULT; + crq->s.len = cpu_to_be16(len); + } else { + error_report("%s: DMA write failure\n", __func__); + crq->s.msg = SPAPR_VTPM_VTPM_ERROR; + crq->s.len = cpu_to_be16(0); + crq->s.data = cpu_to_be32(SPAPR_VTPM_ERR_COPY_OUT_FAILED); + } + + rc = spapr_vio_send_crq(&s->vdev, crq->raw); + if (rc) { + error_report("%s: Error sending response\n", __func__); + } +} + +static int tpm_spapr_do_startup_tpm(SPAPRvTPMState *s, size_t buffersize) +{ + return tpm_backend_startup_tpm(s->be_driver, buffersize); +} + +static void tpm_spapr_reset(VIOsPAPRDevice *dev) +{ + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); + + s->state = SPAPR_VTPM_STATE_NONE; + + s->be_tpm_version = tpm_backend_get_tpm_version(s->be_driver); + + s->be_buffer_size = MAX(ROUND_UP(tpm_backend_get_buffer_size(s->be_driver), + TARGET_PAGE_SIZE), + sizeof(s->buffer)); + + tpm_backend_reset(s->be_driver); + tpm_spapr_do_startup_tpm(s, s->be_buffer_size); +} + +static enum TPMVersion tpm_spapr_get_version(TPMIf *ti) +{ + SPAPRvTPMState *s = VIO_SPAPR_VTPM(ti); + + if (tpm_backend_had_startup_error(s->be_driver)) { + return TPM_VERSION_UNSPEC; + } + + return tpm_backend_get_tpm_version(s->be_driver); +} + +static const VMStateDescription vmstate_spapr_vtpm = { + .name = "tpm_spapr", + .unmigratable = 1, +}; + +static Property tpm_spapr_properties[] = { + DEFINE_SPAPR_PROPERTIES(SPAPRvTPMState, vdev), + DEFINE_PROP_TPMBE("tpmdev", SPAPRvTPMState, be_driver), + DEFINE_PROP_END_OF_LIST(), +}; + +static void tpm_spapr_realizefn(VIOsPAPRDevice *dev, Error **errp) +{ + SPAPRvTPMState *s = VIO_SPAPR_VTPM(dev); + + if (!tpm_find()) { + error_setg(errp, "at most one TPM device is permitted"); + return; + } + + dev->crq.SendFunc = tpm_spapr_do_crq; + + if (!s->be_driver) { + error_setg(errp, "'tpmdev' property is required"); + return; + } +} + +static void tpm_spapr_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + VIOsPAPRDeviceClass *k = VIO_SPAPR_DEVICE_CLASS(klass); + TPMIfClass *tc = TPM_IF_CLASS(klass); + + k->realize = tpm_spapr_realizefn; + k->reset = tpm_spapr_reset; + k->dt_name = "vtpm"; + k->dt_type = "IBM,vtpm"; + k->dt_compatible = "IBM,vtpm"; + k->signal_mask = 0x00000001; + set_bit(DEVICE_CATEGORY_MISC, dc->categories); + dc->props = tpm_spapr_properties; + k->rtce_window_size = 0x10000000; + dc->vmsd = &vmstate_spapr_vtpm; + + tc->model = TPM_MODEL_TPM_SPAPR; + tc->get_version = tpm_spapr_get_version; + tc->request_completed = tpm_spapr_request_completed; +} + +static const TypeInfo tpm_spapr_info = { + .name = TYPE_TPM_SPAPR, + .parent = TYPE_VIO_SPAPR_DEVICE, + .instance_size = sizeof(SPAPRvTPMState), + .class_init = tpm_spapr_class_init, + .interfaces = (InterfaceInfo[]) { + { TYPE_TPM_IF }, + { } + } +}; + +static void tpm_spapr_register_types(void) +{ + type_register_static(&tpm_spapr_info); +} + +type_init(tpm_spapr_register_types) diff --git a/include/sysemu/tpm.h b/include/sysemu/tpm.h index 852e026..afefadd 100644 --- a/include/sysemu/tpm.h +++ b/include/sysemu/tpm.h @@ -46,9 +46,12 @@ typedef struct TPMIfClass { } TPMIfClass; #define TYPE_TPM_TIS "tpm-tis" +#define TYPE_TPM_SPAPR "tpm-spapr" #define TPM_IS_TIS(chr) \ object_dynamic_cast(OBJECT(chr), TYPE_TPM_TIS) +#define TPM_IS_SPAPR(chr) \ + object_dynamic_cast(OBJECT(chr), TYPE_TPM_SPAPR) /* returns NULL unless there is exactly one TPM device */ static inline TPMIf *tpm_find(void) diff --git a/qapi/tpm.json b/qapi/tpm.json index 7093f26..dfa6a32 100644 --- a/qapi/tpm.json +++ b/qapi/tpm.json @@ -11,10 +11,11 @@ # An enumeration of TPM models # # @tpm-tis: TPM TIS model +# @tpm-spapr: TPM PAPR model (since 2.12) # # Since: 1.5 ## -{ 'enum': 'TpmModel', 'data': [ 'tpm-tis' ] } +{ 'enum': 'TpmModel', 'data': [ 'tpm-tis', 'tpm-spapr' ] } ## # @query-tpm-models: @@ -28,7 +29,7 @@ # Example: # # -> { "execute": "query-tpm-models" } -# <- { "return": [ "tpm-tis" ] } +# <- { "return": [ "tpm-tis", "tpm-spapr" ] } # ## { 'command': 'query-tpm-models', 'returns': ['TpmModel'] }
Implement support for TPM on ppc64 by implementing the vTPM CRQ interface as a frontend. It can use the tpm_emulator driver backend with the external swtpm. The Linux vTPM driver for ppc64 works with this emulation. This TPM emulator also handles the TPM 2 case. Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com> --- hw/tpm/Makefile.objs | 1 + hw/tpm/tpm_spapr.c | 382 +++++++++++++++++++++++++++++++++++++++++++++++++++ include/sysemu/tpm.h | 3 + qapi/tpm.json | 5 +- 4 files changed, 389 insertions(+), 2 deletions(-) create mode 100644 hw/tpm/tpm_spapr.c