From patchwork Fri Jul 14 07:09:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Joelle van Dyne X-Patchwork-Id: 13313016 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id B9802EB64DC for ; Fri, 14 Jul 2023 07:10:37 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qKCwB-0006MO-Al; Fri, 14 Jul 2023 03:09:59 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qKCw9-0006Lm-Rf for qemu-devel@nongnu.org; Fri, 14 Jul 2023 03:09:57 -0400 Received: from mail-pl1-f182.google.com ([209.85.214.182]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qKCw4-00058C-Vj for qemu-devel@nongnu.org; Fri, 14 Jul 2023 03:09:57 -0400 Received: by mail-pl1-f182.google.com with SMTP id d9443c01a7336-1bb119be881so5495535ad.3 for ; Fri, 14 Jul 2023 00:09:52 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20221208; t=1689318591; x=1691910591; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=7A9YqRpYVHi0FIUQ9izC8Ok3r/cQauuYjqe9CGsTos0=; b=SAtvifcnleOgRL2t6qOKr0HhsimR3nWO+vnuX3dGNh17ZYbbg53PS4nSPFtG4jlhXY +fl/OM1sqqqY0x9ITaWuwp/nGzEFI6AutC/l/hVE4e7miYy8YySO7jTrDLXooiy7t46W nBAeIiSTSpLXNVwgIe1Vr2lYz39jNHbywEOUfsJOHlGKKpKESJ2lkBvMNRKbXma2+yGx MmhaMc1vQw7C7VjqN/qaCxYsc7wYxzD38wEGDTAtwBFidXNFKQnWV9ypDNsYOjWNO/fl qUfzl3OOmraUDqk9fJ3eqtgeOK3EsY4QGmpf0E5PISe6hxuef/5t9N5WM5Y/XcwP4olo SeOA== X-Gm-Message-State: ABy/qLaw5YHHQgkojNDKSHnO1i2UhSZ8ZEI4VDjXg/qPtI4Ren2YWQId SaahSJLV7PfMGU9yBBCAQGV4CgQnKnEwkA== X-Google-Smtp-Source: APBJJlFi+NEgnInS9kJviVlTeSveL7C41eZE8L7fX1j5L0PNQ+7Z32ELyqdds+IVznEJIDG/GYDRGg== X-Received: by 2002:a17:902:b210:b0:1b6:797d:33fb with SMTP id t16-20020a170902b21000b001b6797d33fbmr3599911plr.64.1689318590950; Fri, 14 Jul 2023 00:09:50 -0700 (PDT) Received: from localhost.localdomain ([2607:fb90:dd17:8dad:e558:8948:1ff6:c8c1]) by smtp.gmail.com with ESMTPSA id t8-20020a170902b20800b001b89466a5f4sm7041513plr.105.2023.07.14.00.09.50 (version=TLS1_3 cipher=TLS_CHACHA20_POLY1305_SHA256 bits=256/256); Fri, 14 Jul 2023 00:09:50 -0700 (PDT) From: Joelle van Dyne To: qemu-devel@nongnu.org Cc: Joelle van Dyne , Stefan Berger , Stefan Berger Subject: [PATCH v2 01/11] tpm_crb: refactor common code Date: Fri, 14 Jul 2023 00:09:17 -0700 Message-ID: <20230714070931.23476-2-j@getutm.app> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230714070931.23476-1-j@getutm.app> References: <20230714070931.23476-1-j@getutm.app> MIME-Version: 1.0 Received-SPF: pass client-ip=209.85.214.182; envelope-from=osy86dev@gmail.com; helo=mail-pl1-f182.google.com X-Spam_score_int: -13 X-Spam_score: -1.4 X-Spam_bar: - X-Spam_report: (-1.4 / 5.0 requ) BAYES_00=-1.9, FREEMAIL_FORGED_FROMDOMAIN=0.25, FREEMAIL_FROM=0.001, HEADER_FROM_DIFFERENT_DOMAINS=0.25, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org In preparation for the SysBus variant, we move common code styled after the TPM TIS devices. To maintain compatibility, we do not rename the existing tpm-crb device. Signed-off-by: Joelle van Dyne Reviewed-by: Stefan Berger --- docs/specs/tpm.rst | 1 + hw/tpm/tpm_crb.h | 76 +++++++++++ hw/tpm/tpm_crb.c | 270 ++++++---------------------------------- hw/tpm/tpm_crb_common.c | 218 ++++++++++++++++++++++++++++++++ hw/tpm/meson.build | 1 + hw/tpm/trace-events | 2 +- 6 files changed, 333 insertions(+), 235 deletions(-) create mode 100644 hw/tpm/tpm_crb.h create mode 100644 hw/tpm/tpm_crb_common.c diff --git a/docs/specs/tpm.rst b/docs/specs/tpm.rst index efe124a148..2bc29c9804 100644 --- a/docs/specs/tpm.rst +++ b/docs/specs/tpm.rst @@ -45,6 +45,7 @@ operating system. QEMU files related to TPM CRB interface: - ``hw/tpm/tpm_crb.c`` + - ``hw/tpm/tpm_crb_common.c`` SPAPR interface --------------- diff --git a/hw/tpm/tpm_crb.h b/hw/tpm/tpm_crb.h new file mode 100644 index 0000000000..da3a0cf256 --- /dev/null +++ b/hw/tpm/tpm_crb.h @@ -0,0 +1,76 @@ +/* + * tpm_crb.h - QEMU's TPM CRB interface emulator + * + * Copyright (c) 2018 Red Hat, Inc. + * + * Authors: + * Marc-André Lureau + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + * tpm_crb is a device for TPM 2.0 Command Response Buffer (CRB) Interface + * as defined in TCG PC Client Platform TPM Profile (PTP) Specification + * Family “2.0” Level 00 Revision 01.03 v22 + */ +#ifndef TPM_TPM_CRB_H +#define TPM_TPM_CRB_H + +#include "exec/memory.h" +#include "hw/acpi/tpm.h" +#include "sysemu/tpm_backend.h" +#include "tpm_ppi.h" + +#define CRB_CTRL_CMD_SIZE (TPM_CRB_ADDR_SIZE - A_CRB_DATA_BUFFER) + +typedef struct TPMCRBState { + TPMBackend *tpmbe; + TPMBackendCmd cmd; + uint32_t regs[TPM_CRB_R_MAX]; + MemoryRegion mmio; + MemoryRegion cmdmem; + + size_t be_buffer_size; + + bool ppi_enabled; + TPMPPI ppi; +} TPMCRBState; + +#define CRB_INTF_TYPE_CRB_ACTIVE 0b1 +#define CRB_INTF_VERSION_CRB 0b1 +#define CRB_INTF_CAP_LOCALITY_0_ONLY 0b0 +#define CRB_INTF_CAP_IDLE_FAST 0b0 +#define CRB_INTF_CAP_XFER_SIZE_64 0b11 +#define CRB_INTF_CAP_FIFO_NOT_SUPPORTED 0b0 +#define CRB_INTF_CAP_CRB_SUPPORTED 0b1 +#define CRB_INTF_IF_SELECTOR_CRB 0b1 + +enum crb_loc_ctrl { + CRB_LOC_CTRL_REQUEST_ACCESS = BIT(0), + CRB_LOC_CTRL_RELINQUISH = BIT(1), + CRB_LOC_CTRL_SEIZE = BIT(2), + CRB_LOC_CTRL_RESET_ESTABLISHMENT_BIT = BIT(3), +}; + +enum crb_ctrl_req { + CRB_CTRL_REQ_CMD_READY = BIT(0), + CRB_CTRL_REQ_GO_IDLE = BIT(1), +}; + +enum crb_start { + CRB_START_INVOKE = BIT(0), +}; + +enum crb_cancel { + CRB_CANCEL_INVOKE = BIT(0), +}; + +#define TPM_CRB_NO_LOCALITY 0xff + +void tpm_crb_request_completed(TPMCRBState *s, int ret); +enum TPMVersion tpm_crb_get_version(TPMCRBState *s); +int tpm_crb_pre_save(TPMCRBState *s); +void tpm_crb_reset(TPMCRBState *s, uint64_t baseaddr); +void tpm_crb_init_memory(Object *obj, TPMCRBState *s, Error **errp); + +#endif /* TPM_TPM_CRB_H */ diff --git a/hw/tpm/tpm_crb.c b/hw/tpm/tpm_crb.c index ea930da545..3ef4977fb5 100644 --- a/hw/tpm/tpm_crb.c +++ b/hw/tpm/tpm_crb.c @@ -31,257 +31,62 @@ #include "tpm_ppi.h" #include "trace.h" #include "qom/object.h" +#include "tpm_crb.h" struct CRBState { DeviceState parent_obj; - TPMBackend *tpmbe; - TPMBackendCmd cmd; - uint32_t regs[TPM_CRB_R_MAX]; - MemoryRegion mmio; - MemoryRegion cmdmem; - - size_t be_buffer_size; - - bool ppi_enabled; - TPMPPI ppi; + TPMCRBState state; }; typedef struct CRBState CRBState; DECLARE_INSTANCE_CHECKER(CRBState, CRB, TYPE_TPM_CRB) -#define CRB_INTF_TYPE_CRB_ACTIVE 0b1 -#define CRB_INTF_VERSION_CRB 0b1 -#define CRB_INTF_CAP_LOCALITY_0_ONLY 0b0 -#define CRB_INTF_CAP_IDLE_FAST 0b0 -#define CRB_INTF_CAP_XFER_SIZE_64 0b11 -#define CRB_INTF_CAP_FIFO_NOT_SUPPORTED 0b0 -#define CRB_INTF_CAP_CRB_SUPPORTED 0b1 -#define CRB_INTF_IF_SELECTOR_CRB 0b1 - -#define CRB_CTRL_CMD_SIZE (TPM_CRB_ADDR_SIZE - A_CRB_DATA_BUFFER) - -enum crb_loc_ctrl { - CRB_LOC_CTRL_REQUEST_ACCESS = BIT(0), - CRB_LOC_CTRL_RELINQUISH = BIT(1), - CRB_LOC_CTRL_SEIZE = BIT(2), - CRB_LOC_CTRL_RESET_ESTABLISHMENT_BIT = BIT(3), -}; - -enum crb_ctrl_req { - CRB_CTRL_REQ_CMD_READY = BIT(0), - CRB_CTRL_REQ_GO_IDLE = BIT(1), -}; - -enum crb_start { - CRB_START_INVOKE = BIT(0), -}; - -enum crb_cancel { - CRB_CANCEL_INVOKE = BIT(0), -}; - -#define TPM_CRB_NO_LOCALITY 0xff - -static uint64_t tpm_crb_mmio_read(void *opaque, hwaddr addr, - unsigned size) -{ - CRBState *s = CRB(opaque); - void *regs = (void *)&s->regs + (addr & ~3); - unsigned offset = addr & 3; - uint32_t val = *(uint32_t *)regs >> (8 * offset); - - switch (addr) { - case A_CRB_LOC_STATE: - val |= !tpm_backend_get_tpm_established_flag(s->tpmbe); - break; - } - - trace_tpm_crb_mmio_read(addr, size, val); - - return val; -} - -static uint8_t tpm_crb_get_active_locty(CRBState *s) -{ - if (!ARRAY_FIELD_EX32(s->regs, CRB_LOC_STATE, locAssigned)) { - return TPM_CRB_NO_LOCALITY; - } - return ARRAY_FIELD_EX32(s->regs, CRB_LOC_STATE, activeLocality); -} - -static void tpm_crb_mmio_write(void *opaque, hwaddr addr, - uint64_t val, unsigned size) -{ - CRBState *s = CRB(opaque); - uint8_t locty = addr >> 12; - - trace_tpm_crb_mmio_write(addr, size, val); - - switch (addr) { - case A_CRB_CTRL_REQ: - switch (val) { - case CRB_CTRL_REQ_CMD_READY: - ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS, - tpmIdle, 0); - break; - case CRB_CTRL_REQ_GO_IDLE: - ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS, - tpmIdle, 1); - break; - } - break; - case A_CRB_CTRL_CANCEL: - if (val == CRB_CANCEL_INVOKE && - s->regs[R_CRB_CTRL_START] & CRB_START_INVOKE) { - tpm_backend_cancel_cmd(s->tpmbe); - } - break; - case A_CRB_CTRL_START: - if (val == CRB_START_INVOKE && - !(s->regs[R_CRB_CTRL_START] & CRB_START_INVOKE) && - tpm_crb_get_active_locty(s) == locty) { - void *mem = memory_region_get_ram_ptr(&s->cmdmem); - - s->regs[R_CRB_CTRL_START] |= CRB_START_INVOKE; - s->cmd = (TPMBackendCmd) { - .in = mem, - .in_len = MIN(tpm_cmd_get_size(mem), s->be_buffer_size), - .out = mem, - .out_len = s->be_buffer_size, - }; - - tpm_backend_deliver_request(s->tpmbe, &s->cmd); - } - break; - case A_CRB_LOC_CTRL: - switch (val) { - case CRB_LOC_CTRL_RESET_ESTABLISHMENT_BIT: - /* not loc 3 or 4 */ - break; - case CRB_LOC_CTRL_RELINQUISH: - ARRAY_FIELD_DP32(s->regs, CRB_LOC_STATE, - locAssigned, 0); - ARRAY_FIELD_DP32(s->regs, CRB_LOC_STS, - Granted, 0); - break; - case CRB_LOC_CTRL_REQUEST_ACCESS: - ARRAY_FIELD_DP32(s->regs, CRB_LOC_STS, - Granted, 1); - ARRAY_FIELD_DP32(s->regs, CRB_LOC_STS, - beenSeized, 0); - ARRAY_FIELD_DP32(s->regs, CRB_LOC_STATE, - locAssigned, 1); - break; - } - break; - } -} - -static const MemoryRegionOps tpm_crb_memory_ops = { - .read = tpm_crb_mmio_read, - .write = tpm_crb_mmio_write, - .endianness = DEVICE_LITTLE_ENDIAN, - .valid = { - .min_access_size = 1, - .max_access_size = 4, - }, -}; - -static void tpm_crb_request_completed(TPMIf *ti, int ret) +static void tpm_crb_none_request_completed(TPMIf *ti, int ret) { CRBState *s = CRB(ti); - s->regs[R_CRB_CTRL_START] &= ~CRB_START_INVOKE; - if (ret != 0) { - ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS, - tpmSts, 1); /* fatal error */ - } - memory_region_set_dirty(&s->cmdmem, 0, CRB_CTRL_CMD_SIZE); + tpm_crb_request_completed(&s->state, ret); } -static enum TPMVersion tpm_crb_get_version(TPMIf *ti) +static enum TPMVersion tpm_crb_none_get_version(TPMIf *ti) { CRBState *s = CRB(ti); - return tpm_backend_get_tpm_version(s->tpmbe); + return tpm_crb_get_version(&s->state); } -static int tpm_crb_pre_save(void *opaque) +static int tpm_crb_none_pre_save(void *opaque) { CRBState *s = opaque; - tpm_backend_finish_sync(s->tpmbe); - - return 0; + return tpm_crb_pre_save(&s->state); } -static const VMStateDescription vmstate_tpm_crb = { +static const VMStateDescription vmstate_tpm_crb_none = { .name = "tpm-crb", - .pre_save = tpm_crb_pre_save, + .pre_save = tpm_crb_none_pre_save, .fields = (VMStateField[]) { - VMSTATE_UINT32_ARRAY(regs, CRBState, TPM_CRB_R_MAX), + VMSTATE_UINT32_ARRAY(state.regs, CRBState, TPM_CRB_R_MAX), VMSTATE_END_OF_LIST(), } }; -static Property tpm_crb_properties[] = { - DEFINE_PROP_TPMBE("tpmdev", CRBState, tpmbe), - DEFINE_PROP_BOOL("ppi", CRBState, ppi_enabled, true), +static Property tpm_crb_none_properties[] = { + DEFINE_PROP_TPMBE("tpmdev", CRBState, state.tpmbe), + DEFINE_PROP_BOOL("ppi", CRBState, state.ppi_enabled, true), DEFINE_PROP_END_OF_LIST(), }; -static void tpm_crb_reset(void *dev) +static void tpm_crb_none_reset(void *dev) { CRBState *s = CRB(dev); - if (s->ppi_enabled) { - tpm_ppi_reset(&s->ppi); - } - tpm_backend_reset(s->tpmbe); - - memset(s->regs, 0, sizeof(s->regs)); - - ARRAY_FIELD_DP32(s->regs, CRB_LOC_STATE, - tpmRegValidSts, 1); - ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS, - tpmIdle, 1); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - InterfaceType, CRB_INTF_TYPE_CRB_ACTIVE); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - InterfaceVersion, CRB_INTF_VERSION_CRB); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - CapLocality, CRB_INTF_CAP_LOCALITY_0_ONLY); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - CapCRBIdleBypass, CRB_INTF_CAP_IDLE_FAST); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - CapDataXferSizeSupport, CRB_INTF_CAP_XFER_SIZE_64); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - CapFIFO, CRB_INTF_CAP_FIFO_NOT_SUPPORTED); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - CapCRB, CRB_INTF_CAP_CRB_SUPPORTED); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - InterfaceSelector, CRB_INTF_IF_SELECTOR_CRB); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, - RID, 0b0000); - ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID2, - VID, PCI_VENDOR_ID_IBM); - - s->regs[R_CRB_CTRL_CMD_SIZE] = CRB_CTRL_CMD_SIZE; - s->regs[R_CRB_CTRL_CMD_LADDR] = TPM_CRB_ADDR_BASE + A_CRB_DATA_BUFFER; - s->regs[R_CRB_CTRL_RSP_SIZE] = CRB_CTRL_CMD_SIZE; - s->regs[R_CRB_CTRL_RSP_ADDR] = TPM_CRB_ADDR_BASE + A_CRB_DATA_BUFFER; - - s->be_buffer_size = MIN(tpm_backend_get_buffer_size(s->tpmbe), - CRB_CTRL_CMD_SIZE); - - if (tpm_backend_startup_tpm(s->tpmbe, s->be_buffer_size) < 0) { - exit(1); - } + return tpm_crb_reset(&s->state, TPM_CRB_ADDR_BASE); } -static void tpm_crb_realize(DeviceState *dev, Error **errp) +static void tpm_crb_none_realize(DeviceState *dev, Error **errp) { CRBState *s = CRB(dev); @@ -289,64 +94,61 @@ static void tpm_crb_realize(DeviceState *dev, Error **errp) error_setg(errp, "at most one TPM device is permitted"); return; } - if (!s->tpmbe) { + if (!s->state.tpmbe) { error_setg(errp, "'tpmdev' property is required"); return; } - memory_region_init_io(&s->mmio, OBJECT(s), &tpm_crb_memory_ops, s, - "tpm-crb-mmio", sizeof(s->regs)); - memory_region_init_ram(&s->cmdmem, OBJECT(s), - "tpm-crb-cmd", CRB_CTRL_CMD_SIZE, errp); + tpm_crb_init_memory(OBJECT(s), &s->state, errp); memory_region_add_subregion(get_system_memory(), - TPM_CRB_ADDR_BASE, &s->mmio); + TPM_CRB_ADDR_BASE, &s->state.mmio); memory_region_add_subregion(get_system_memory(), - TPM_CRB_ADDR_BASE + sizeof(s->regs), &s->cmdmem); + TPM_CRB_ADDR_BASE + sizeof(s->state.regs), &s->state.cmdmem); - if (s->ppi_enabled) { - tpm_ppi_init(&s->ppi, get_system_memory(), + if (s->state.ppi_enabled) { + tpm_ppi_init(&s->state.ppi, get_system_memory(), TPM_PPI_ADDR_BASE, OBJECT(s)); } if (xen_enabled()) { - tpm_crb_reset(dev); + tpm_crb_none_reset(dev); } else { - qemu_register_reset(tpm_crb_reset, dev); + qemu_register_reset(tpm_crb_none_reset, dev); } } -static void tpm_crb_class_init(ObjectClass *klass, void *data) +static void tpm_crb_none_class_init(ObjectClass *klass, void *data) { DeviceClass *dc = DEVICE_CLASS(klass); TPMIfClass *tc = TPM_IF_CLASS(klass); - dc->realize = tpm_crb_realize; - device_class_set_props(dc, tpm_crb_properties); - dc->vmsd = &vmstate_tpm_crb; + dc->realize = tpm_crb_none_realize; + device_class_set_props(dc, tpm_crb_none_properties); + dc->vmsd = &vmstate_tpm_crb_none; dc->user_creatable = true; tc->model = TPM_MODEL_TPM_CRB; - tc->get_version = tpm_crb_get_version; - tc->request_completed = tpm_crb_request_completed; + tc->get_version = tpm_crb_none_get_version; + tc->request_completed = tpm_crb_none_request_completed; set_bit(DEVICE_CATEGORY_MISC, dc->categories); } -static const TypeInfo tpm_crb_info = { +static const TypeInfo tpm_crb_none_info = { .name = TYPE_TPM_CRB, /* could be TYPE_SYS_BUS_DEVICE (or LPC etc) */ .parent = TYPE_DEVICE, .instance_size = sizeof(CRBState), - .class_init = tpm_crb_class_init, + .class_init = tpm_crb_none_class_init, .interfaces = (InterfaceInfo[]) { { TYPE_TPM_IF }, { } } }; -static void tpm_crb_register(void) +static void tpm_crb_none_register(void) { - type_register_static(&tpm_crb_info); + type_register_static(&tpm_crb_none_info); } -type_init(tpm_crb_register) +type_init(tpm_crb_none_register) diff --git a/hw/tpm/tpm_crb_common.c b/hw/tpm/tpm_crb_common.c new file mode 100644 index 0000000000..4c173affb6 --- /dev/null +++ b/hw/tpm/tpm_crb_common.c @@ -0,0 +1,218 @@ +/* + * tpm_crb.c - QEMU's TPM CRB interface emulator + * + * Copyright (c) 2018 Red Hat, Inc. + * + * Authors: + * Marc-André Lureau + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + * tpm_crb is a device for TPM 2.0 Command Response Buffer (CRB) Interface + * as defined in TCG PC Client Platform TPM Profile (PTP) Specification + * Family “2.0” Level 00 Revision 01.03 v22 + */ + +#include "qemu/osdep.h" + +#include "qemu/module.h" +#include "qapi/error.h" +#include "exec/address-spaces.h" +#include "hw/qdev-properties.h" +#include "hw/pci/pci_ids.h" +#include "hw/acpi/tpm.h" +#include "migration/vmstate.h" +#include "sysemu/tpm_backend.h" +#include "sysemu/tpm_util.h" +#include "sysemu/reset.h" +#include "sysemu/xen.h" +#include "tpm_prop.h" +#include "tpm_ppi.h" +#include "trace.h" +#include "qom/object.h" +#include "tpm_crb.h" + +static uint64_t tpm_crb_mmio_read(void *opaque, hwaddr addr, + unsigned size) +{ + TPMCRBState *s = opaque; + void *regs = (void *)&s->regs + (addr & ~3); + unsigned offset = addr & 3; + uint32_t val = *(uint32_t *)regs >> (8 * offset); + + switch (addr) { + case A_CRB_LOC_STATE: + val |= !tpm_backend_get_tpm_established_flag(s->tpmbe); + break; + } + + trace_tpm_crb_mmio_read(addr, size, val); + + return val; +} + +static uint8_t tpm_crb_get_active_locty(TPMCRBState *s) +{ + if (!ARRAY_FIELD_EX32(s->regs, CRB_LOC_STATE, locAssigned)) { + return TPM_CRB_NO_LOCALITY; + } + return ARRAY_FIELD_EX32(s->regs, CRB_LOC_STATE, activeLocality); +} + +static void tpm_crb_mmio_write(void *opaque, hwaddr addr, + uint64_t val, unsigned size) +{ + TPMCRBState *s = opaque; + uint8_t locty = addr >> 12; + + trace_tpm_crb_mmio_write(addr, size, val); + + switch (addr) { + case A_CRB_CTRL_REQ: + switch (val) { + case CRB_CTRL_REQ_CMD_READY: + ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS, + tpmIdle, 0); + break; + case CRB_CTRL_REQ_GO_IDLE: + ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS, + tpmIdle, 1); + break; + } + break; + case A_CRB_CTRL_CANCEL: + if (val == CRB_CANCEL_INVOKE && + s->regs[R_CRB_CTRL_START] & CRB_START_INVOKE) { + tpm_backend_cancel_cmd(s->tpmbe); + } + break; + case A_CRB_CTRL_START: + if (val == CRB_START_INVOKE && + !(s->regs[R_CRB_CTRL_START] & CRB_START_INVOKE) && + tpm_crb_get_active_locty(s) == locty) { + void *mem = memory_region_get_ram_ptr(&s->cmdmem); + + s->regs[R_CRB_CTRL_START] |= CRB_START_INVOKE; + s->cmd = (TPMBackendCmd) { + .in = mem, + .in_len = MIN(tpm_cmd_get_size(mem), s->be_buffer_size), + .out = mem, + .out_len = s->be_buffer_size, + }; + + tpm_backend_deliver_request(s->tpmbe, &s->cmd); + } + break; + case A_CRB_LOC_CTRL: + switch (val) { + case CRB_LOC_CTRL_RESET_ESTABLISHMENT_BIT: + /* not loc 3 or 4 */ + break; + case CRB_LOC_CTRL_RELINQUISH: + ARRAY_FIELD_DP32(s->regs, CRB_LOC_STATE, + locAssigned, 0); + ARRAY_FIELD_DP32(s->regs, CRB_LOC_STS, + Granted, 0); + break; + case CRB_LOC_CTRL_REQUEST_ACCESS: + ARRAY_FIELD_DP32(s->regs, CRB_LOC_STS, + Granted, 1); + ARRAY_FIELD_DP32(s->regs, CRB_LOC_STS, + beenSeized, 0); + ARRAY_FIELD_DP32(s->regs, CRB_LOC_STATE, + locAssigned, 1); + break; + } + break; + } +} + +const MemoryRegionOps tpm_crb_memory_ops = { + .read = tpm_crb_mmio_read, + .write = tpm_crb_mmio_write, + .endianness = DEVICE_LITTLE_ENDIAN, + .valid = { + .min_access_size = 1, + .max_access_size = 4, + }, +}; + +void tpm_crb_request_completed(TPMCRBState *s, int ret) +{ + s->regs[R_CRB_CTRL_START] &= ~CRB_START_INVOKE; + if (ret != 0) { + ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS, + tpmSts, 1); /* fatal error */ + } + memory_region_set_dirty(&s->cmdmem, 0, CRB_CTRL_CMD_SIZE); +} + +enum TPMVersion tpm_crb_get_version(TPMCRBState *s) +{ + return tpm_backend_get_tpm_version(s->tpmbe); +} + +int tpm_crb_pre_save(TPMCRBState *s) +{ + tpm_backend_finish_sync(s->tpmbe); + + return 0; +} + +void tpm_crb_reset(TPMCRBState *s, uint64_t baseaddr) +{ + if (s->ppi_enabled) { + tpm_ppi_reset(&s->ppi); + } + tpm_backend_reset(s->tpmbe); + + memset(s->regs, 0, sizeof(s->regs)); + + ARRAY_FIELD_DP32(s->regs, CRB_LOC_STATE, + tpmRegValidSts, 1); + ARRAY_FIELD_DP32(s->regs, CRB_CTRL_STS, + tpmIdle, 1); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + InterfaceType, CRB_INTF_TYPE_CRB_ACTIVE); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + InterfaceVersion, CRB_INTF_VERSION_CRB); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + CapLocality, CRB_INTF_CAP_LOCALITY_0_ONLY); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + CapCRBIdleBypass, CRB_INTF_CAP_IDLE_FAST); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + CapDataXferSizeSupport, CRB_INTF_CAP_XFER_SIZE_64); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + CapFIFO, CRB_INTF_CAP_FIFO_NOT_SUPPORTED); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + CapCRB, CRB_INTF_CAP_CRB_SUPPORTED); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + InterfaceSelector, CRB_INTF_IF_SELECTOR_CRB); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID, + RID, 0b0000); + ARRAY_FIELD_DP32(s->regs, CRB_INTF_ID2, + VID, PCI_VENDOR_ID_IBM); + + baseaddr += A_CRB_DATA_BUFFER; + s->regs[R_CRB_CTRL_CMD_SIZE] = CRB_CTRL_CMD_SIZE; + s->regs[R_CRB_CTRL_CMD_LADDR] = (uint32_t)baseaddr; + s->regs[R_CRB_CTRL_CMD_HADDR] = (uint32_t)(baseaddr >> 32); + s->regs[R_CRB_CTRL_RSP_SIZE] = CRB_CTRL_CMD_SIZE; + s->regs[R_CRB_CTRL_RSP_ADDR] = (uint32_t)baseaddr; + + s->be_buffer_size = MIN(tpm_backend_get_buffer_size(s->tpmbe), + CRB_CTRL_CMD_SIZE); + + if (tpm_backend_startup_tpm(s->tpmbe, s->be_buffer_size) < 0) { + exit(1); + } +} + +void tpm_crb_init_memory(Object *obj, TPMCRBState *s, Error **errp) +{ + memory_region_init_io(&s->mmio, obj, &tpm_crb_memory_ops, s, + "tpm-crb-mmio", sizeof(s->regs)); + memory_region_init_ram(&s->cmdmem, obj, + "tpm-crb-cmd", CRB_CTRL_CMD_SIZE, errp); +} diff --git a/hw/tpm/meson.build b/hw/tpm/meson.build index 6968e60b3f..cb8204d5bc 100644 --- a/hw/tpm/meson.build +++ b/hw/tpm/meson.build @@ -3,6 +3,7 @@ system_ss.add(when: 'CONFIG_TPM_TIS_ISA', if_true: files('tpm_tis_isa.c')) system_ss.add(when: 'CONFIG_TPM_TIS_SYSBUS', if_true: files('tpm_tis_sysbus.c')) system_ss.add(when: 'CONFIG_TPM_TIS_I2C', if_true: files('tpm_tis_i2c.c')) system_ss.add(when: 'CONFIG_TPM_CRB', if_true: files('tpm_crb.c')) +system_ss.add(when: 'CONFIG_TPM_CRB', if_true: files('tpm_crb_common.c')) system_ss.add(when: 'CONFIG_TPM_TIS', if_true: files('tpm_ppi.c')) system_ss.add(when: 'CONFIG_TPM_CRB', if_true: files('tpm_ppi.c')) diff --git a/hw/tpm/trace-events b/hw/tpm/trace-events index fa882dfefe..3ab1bdb97b 100644 --- a/hw/tpm/trace-events +++ b/hw/tpm/trace-events @@ -1,6 +1,6 @@ # See docs/devel/tracing.rst for syntax documentation. -# tpm_crb.c +# tpm_crb_common.c tpm_crb_mmio_read(uint64_t addr, unsigned size, uint32_t val) "CRB read 0x%016" PRIx64 " len:%u val: 0x%" PRIx32 tpm_crb_mmio_write(uint64_t addr, unsigned size, uint32_t val) "CRB write 0x%016" PRIx64 " len:%u val: 0x%" PRIx32