tpm: Move backend code under the 'backends/' directory

TPM subsytem is split into backends (see commit f4ede81eed2)
and frontends (see i.e. 3676bc69b35). Keep the emulated
hardware 'frontends' under hw/tpm/, but move the backends
in the backends/tpm/ directory.

Suggested-by: Marc-André Lureau <marcandre.lureau@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-id: 20200612085444.8362-13-philmd@redhat.com
Signed-off-by: Stefan Berger <stefanb@linux.vnet.ibm.com>

1 files changed, 0 insertions, 380 deletions

diff --git a/hw/tpm/tpm_util.c b/hw/tpm/tpm_util.c
deleted file mode 100644
index cfc7572a61..0000000000
--- a/hw/tpm/tpm_util.c
+++ /dev/null
@@ -1,380 +0,0 @@
-/*
- * TPM utility functions
- *
- *  Copyright (c) 2010 - 2015 IBM Corporation
- *  Authors:
- *    Stefan Berger <stefanb@us.ibm.com>
- *
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, see <http://www.gnu.org/licenses/>
- */
-
-#include "qemu/osdep.h"
-#include "qemu/error-report.h"
-#include "qapi/error.h"
-#include "qapi/visitor.h"
-#include "tpm_int.h"
-#include "exec/memory.h"
-#include "hw/qdev-properties.h"
-#include "sysemu/tpm_backend.h"
-#include "sysemu/tpm_util.h"
-#include "trace.h"
-
-/* tpm backend property */
-
-static void get_tpm(Object *obj, Visitor *v, const char *name, void *opaque,
-                    Error **errp)
-{
-    DeviceState *dev = DEVICE(obj);
-    TPMBackend **be = qdev_get_prop_ptr(dev, opaque);
-    char *p;
-
-    p = g_strdup(*be ? (*be)->id : "");
-    visit_type_str(v, name, &p, errp);
-    g_free(p);
-}
-
-static void set_tpm(Object *obj, Visitor *v, const char *name, void *opaque,
-                    Error **errp)
-{
-    DeviceState *dev = DEVICE(obj);
-    Error *local_err = NULL;
-    Property *prop = opaque;
-    TPMBackend *s, **be = qdev_get_prop_ptr(dev, prop);
-    char *str;
-
-    if (dev->realized) {
-        qdev_prop_set_after_realize(dev, name, errp);
-        return;
-    }
-
-    visit_type_str(v, name, &str, &local_err);
-    if (local_err) {
-        error_propagate(errp, local_err);
-        return;
-    }
-
-    s = qemu_find_tpm_be(str);
-    if (s == NULL) {
-        error_setg(errp, "Property '%s.%s' can't find value '%s'",
-                   object_get_typename(obj), prop->name, str);
-    } else if (tpm_backend_init(s, TPM_IF(obj), errp) == 0) {
-        *be = s; /* weak reference, avoid cyclic ref */
-    }
-    g_free(str);
-}
-
-static void release_tpm(Object *obj, const char *name, void *opaque)
-{
-    DeviceState *dev = DEVICE(obj);
-    Property *prop = opaque;
-    TPMBackend **be = qdev_get_prop_ptr(dev, prop);
-
-    if (*be) {
-        tpm_backend_reset(*be);
-    }
-}
-
-const PropertyInfo qdev_prop_tpm = {
-    .name  = "str",
-    .description = "ID of a tpm to use as a backend",
-    .get   = get_tpm,
-    .set   = set_tpm,
-    .release = release_tpm,
-};
-
-/*
- * Write an error message in the given output buffer.
- */
-void tpm_util_write_fatal_error_response(uint8_t *out, uint32_t out_len)
-{
-    if (out_len >= sizeof(struct tpm_resp_hdr)) {
-        tpm_cmd_set_tag(out, TPM_TAG_RSP_COMMAND);
-        tpm_cmd_set_size(out, sizeof(struct tpm_resp_hdr));
-        tpm_cmd_set_error(out, TPM_FAIL);
-    }
-}
-
-bool tpm_util_is_selftest(const uint8_t *in, uint32_t in_len)
-{
-    if (in_len >= sizeof(struct tpm_req_hdr)) {
-        return tpm_cmd_get_ordinal(in) == TPM_ORD_ContinueSelfTest;
-    }
-
-    return false;
-}
-
-/*
- * Send request to a TPM device. We expect a response within one second.
- */
-static int tpm_util_request(int fd,
-                            const void *request,
-                            size_t requestlen,
-                            void *response,
-                            size_t responselen)
-{
-    fd_set readfds;
-    int n;
-    struct timeval tv = {
-        .tv_sec = 1,
-        .tv_usec = 0,
-    };
-
-    n = write(fd, request, requestlen);
-    if (n < 0) {
-        return -errno;
-    }
-    if (n != requestlen) {
-        return -EFAULT;
-    }
-
-    FD_ZERO(&readfds);
-    FD_SET(fd, &readfds);
-
-    /* wait for a second */
-    n = select(fd + 1, &readfds, NULL, NULL, &tv);
-    if (n != 1) {
-        return -errno;
-    }
-
-    n = read(fd, response, responselen);
-    if (n < sizeof(struct tpm_resp_hdr)) {
-        return -EFAULT;
-    }
-
-    /* check the header */
-    if (tpm_cmd_get_size(response) != n) {
-        return -EMSGSIZE;
-    }
-
-    return 0;
-}
-
-/*
- * A basic test of a TPM device. We expect a well formatted response header
- * (error response is fine).
- */
-static int tpm_util_test(int fd,
-                         const void *request,
-                         size_t requestlen,
-                         uint16_t *return_tag)
-{
-    char buf[1024];
-    ssize_t ret;
-
-    ret = tpm_util_request(fd, request, requestlen,
-                           buf, sizeof(buf));
-    if (ret < 0) {
-        return ret;
-    }
-
-    *return_tag = tpm_cmd_get_tag(buf);
-
-    return 0;
-}
-
-/*
- * Probe for the TPM device in the back
- * Returns 0 on success with the version of the probed TPM set, 1 on failure.
- */
-int tpm_util_test_tpmdev(int tpm_fd, TPMVersion *tpm_version)
-{
-    /*
-     * Sending a TPM1.2 command to a TPM2 should return a TPM1.2
-     * header (tag = 0xc4) and error code (TPM_BADTAG = 0x1e)
-     *
-     * Sending a TPM2 command to a TPM 2 will give a TPM 2 tag in the
-     * header.
-     * Sending a TPM2 command to a TPM 1.2 will give a TPM 1.2 tag
-     * in the header and an error code.
-     */
-    const struct tpm_req_hdr test_req = {
-        .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
-        .len = cpu_to_be32(sizeof(test_req)),
-        .ordinal = cpu_to_be32(TPM_ORD_GetTicks),
-    };
-
-    const struct tpm_req_hdr test_req_tpm2 = {
-        .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
-        .len = cpu_to_be32(sizeof(test_req_tpm2)),
-        .ordinal = cpu_to_be32(TPM2_CC_ReadClock),
-    };
-    uint16_t return_tag;
-    int ret;
-
-    /* Send TPM 2 command */
-    ret = tpm_util_test(tpm_fd, &test_req_tpm2,
-                        sizeof(test_req_tpm2), &return_tag);
-    /* TPM 2 would respond with a tag of TPM2_ST_NO_SESSIONS */
-    if (!ret && return_tag == TPM2_ST_NO_SESSIONS) {
-        *tpm_version = TPM_VERSION_2_0;
-        return 0;
-    }
-
-    /* Send TPM 1.2 command */
-    ret = tpm_util_test(tpm_fd, &test_req,
-                        sizeof(test_req), &return_tag);
-    if (!ret && return_tag == TPM_TAG_RSP_COMMAND) {
-        *tpm_version = TPM_VERSION_1_2;
-        /* this is a TPM 1.2 */
-        return 0;
-    }
-
-    *tpm_version = TPM_VERSION_UNSPEC;
-
-    return 1;
-}
-
-int tpm_util_get_buffer_size(int tpm_fd, TPMVersion tpm_version,
-                             size_t *buffersize)
-{
-    int ret;
-
-    switch (tpm_version) {
-    case TPM_VERSION_1_2: {
-        const struct tpm_req_get_buffer_size {
-            struct tpm_req_hdr hdr;
-            uint32_t capability;
-            uint32_t len;
-            uint32_t subcap;
-        } QEMU_PACKED tpm_get_buffer_size = {
-            .hdr = {
-                .tag = cpu_to_be16(TPM_TAG_RQU_COMMAND),
-                .len = cpu_to_be32(sizeof(tpm_get_buffer_size)),
-                .ordinal = cpu_to_be32(TPM_ORD_GetCapability),
-            },
-            .capability = cpu_to_be32(TPM_CAP_PROPERTY),
-            .len = cpu_to_be32(sizeof(uint32_t)),
-            .subcap = cpu_to_be32(TPM_CAP_PROP_INPUT_BUFFER),
-        };
-        struct tpm_resp_get_buffer_size {
-            struct tpm_resp_hdr hdr;
-            uint32_t len;
-            uint32_t buffersize;
-        } QEMU_PACKED tpm_resp;
-
-        ret = tpm_util_request(tpm_fd, &tpm_get_buffer_size,
-                               sizeof(tpm_get_buffer_size),
-                               &tpm_resp, sizeof(tpm_resp));
-        if (ret < 0) {
-            return ret;
-        }
-
-        if (be32_to_cpu(tpm_resp.hdr.len) != sizeof(tpm_resp) ||
-            be32_to_cpu(tpm_resp.len) != sizeof(uint32_t)) {
-            trace_tpm_util_get_buffer_size_hdr_len(
-                be32_to_cpu(tpm_resp.hdr.len),
-                sizeof(tpm_resp));
-            trace_tpm_util_get_buffer_size_len(be32_to_cpu(tpm_resp.len),
-                                               sizeof(uint32_t));
-            error_report("tpm_util: Got unexpected response to "
-                         "TPM_GetCapability; errcode: 0x%x",
-                         be32_to_cpu(tpm_resp.hdr.errcode));
-            return -EFAULT;
-        }
-        *buffersize = be32_to_cpu(tpm_resp.buffersize);
-        break;
-    }
-    case TPM_VERSION_2_0: {
-        const struct tpm2_req_get_buffer_size {
-            struct tpm_req_hdr hdr;
-            uint32_t capability;
-            uint32_t property;
-            uint32_t count;
-        } QEMU_PACKED tpm2_get_buffer_size = {
-            .hdr = {
-                .tag = cpu_to_be16(TPM2_ST_NO_SESSIONS),
-                .len = cpu_to_be32(sizeof(tpm2_get_buffer_size)),
-                .ordinal = cpu_to_be32(TPM2_CC_GetCapability),
-            },
-            .capability = cpu_to_be32(TPM2_CAP_TPM_PROPERTIES),
-            .property = cpu_to_be32(TPM2_PT_MAX_COMMAND_SIZE),
-            .count = cpu_to_be32(2), /* also get TPM2_PT_MAX_RESPONSE_SIZE */
-        };
-        struct tpm2_resp_get_buffer_size {
-            struct tpm_resp_hdr hdr;
-            uint8_t more;
-            uint32_t capability;
-            uint32_t count;
-            uint32_t property1;
-            uint32_t value1;
-            uint32_t property2;
-            uint32_t value2;
-        } QEMU_PACKED tpm2_resp;
-
-        ret = tpm_util_request(tpm_fd, &tpm2_get_buffer_size,
-                               sizeof(tpm2_get_buffer_size),
-                               &tpm2_resp, sizeof(tpm2_resp));
-        if (ret < 0) {
-            return ret;
-        }
-
-        if (be32_to_cpu(tpm2_resp.hdr.len) != sizeof(tpm2_resp) ||
-            be32_to_cpu(tpm2_resp.count) != 2) {
-            trace_tpm_util_get_buffer_size_hdr_len2(
-                be32_to_cpu(tpm2_resp.hdr.len),
-                sizeof(tpm2_resp));
-            trace_tpm_util_get_buffer_size_len2(
-                be32_to_cpu(tpm2_resp.count), 2);
-            error_report("tpm_util: Got unexpected response to "
-                         "TPM2_GetCapability; errcode: 0x%x",
-                         be32_to_cpu(tpm2_resp.hdr.errcode));
-            return -EFAULT;
-        }
-        *buffersize = MAX(be32_to_cpu(tpm2_resp.value1),
-                          be32_to_cpu(tpm2_resp.value2));
-        break;
-    }
-    case TPM_VERSION_UNSPEC:
-        return -EFAULT;
-    }
-
-    trace_tpm_util_get_buffer_size(*buffersize);
-
-    return 0;
-}
-
-void tpm_sized_buffer_reset(TPMSizedBuffer *tsb)
-{
-    g_free(tsb->buffer);
-    tsb->buffer = NULL;
-    tsb->size = 0;
-}
-
-void tpm_util_show_buffer(const unsigned char *buffer,
-                          size_t buffer_size, const char *string)
-{
-    size_t len, i;
-    char *line_buffer, *p;
-
-    if (!trace_event_get_state_backends(TRACE_TPM_UTIL_SHOW_BUFFER)) {
-        return;
-    }
-    len = MIN(tpm_cmd_get_size(buffer), buffer_size);
-
-    /*
-     * allocate enough room for 3 chars per buffer entry plus a
-     * newline after every 16 chars and a final null terminator.
-     */
-    line_buffer = g_malloc(len * 3 + (len / 16) + 1);
-
-    for (i = 0, p = line_buffer; i < len; i++) {
-        if (i && !(i % 16)) {
-            p += sprintf(p, "\n");
-        }
-        p += sprintf(p, "%.2X ", buffer[i]);
-    }
-    trace_tpm_util_show_buffer(string, len, line_buffer);
-
-    g_free(line_buffer);
-}