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authorPeter Maydell2020-03-03 18:49:48 +0100
committerPeter Maydell2020-03-12 17:01:37 +0100
commit0ea9e6583b0778568ba4c6e749f2848291e4a9b8 (patch)
tree6f7eb8457c167d6b64a9c7adc63487e272d37e8f /hw/misc/stm32f2xx_syscfg.c
parenthw/intc/armv7m_nvic: Rebuild hflags on reset (diff)
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target/arm: Update hflags in trans_CPS_v7m()
For M-profile CPUs, the FAULTMASK value affects the CPU's MMU index (it changes the NegPri bit). We update the hflags after calls to the v7m_msr helper in trans_MSR_v7m() but forgot to do so in trans_CPS_v7m(). Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Message-id: 20200303174950.3298-3-peter.maydell@linaro.org
Diffstat (limited to 'hw/misc/stm32f2xx_syscfg.c')
0 files changed, 0 insertions, 0 deletions
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2025-02-04 07:04:37 +0100
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/*
 * CCID Card Device. Emulated card.
 *
 * Copyright (c) 2011 Red Hat.
 * Written by Alon Levy.
 *
 * This code is licensed under the GNU LGPL, version 2 or later.
 */

/*
 * It can be used to provide access to the local hardware in a non exclusive
 * way, or it can use certificates. It requires the usb-ccid bus.
 *
 * Usage 1: standard, mirror hardware reader+card:
 * qemu .. -usb -device usb-ccid -device ccid-card-emulated
 *
 * Usage 2: use certificates, no hardware required
 * one time: create the certificates:
 *  for i in 1 2 3; do
 *      certutil -d /etc/pki/nssdb -x -t "CT,CT,CT" -S -s "CN=user$i" -n user$i
 *  done
 * qemu .. -usb -device usb-ccid \
 *  -device ccid-card-emulated,cert1=user1,cert2=user2,cert3=user3
 *
 * If you use a non default db for the certificates you can specify it using
 * the db parameter.
 */

#include "qemu/osdep.h"
#include <libcacard.h>

#include "qemu/thread.h"
#include "qemu/main-loop.h"
#include "qemu/module.h"
#include "ccid.h"
#include "hw/qdev-properties.h"
#include "qapi/error.h"

#define DPRINTF(card, lvl, fmt, ...) \
do {\
    if (lvl <= card->debug) {\
        printf("ccid-card-emul: %s: " fmt , __func__, ## __VA_ARGS__);\
    } \
} while (0)


#define TYPE_EMULATED_CCID "ccid-card-emulated"
#define EMULATED_CCID_CARD(obj) \
    OBJECT_CHECK(EmulatedState, (obj), TYPE_EMULATED_CCID)

#define BACKEND_NSS_EMULATED_NAME "nss-emulated"
#define BACKEND_CERTIFICATES_NAME "certificates"

enum {
    BACKEND_NSS_EMULATED = 1,
    BACKEND_CERTIFICATES
};

#define DEFAULT_BACKEND BACKEND_NSS_EMULATED

typedef struct EmulatedState EmulatedState;

enum {
    EMUL_READER_INSERT = 0,
    EMUL_READER_REMOVE,
    EMUL_CARD_INSERT,
    EMUL_CARD_REMOVE,
    EMUL_GUEST_APDU,
    EMUL_RESPONSE_APDU,
    EMUL_ERROR,
};

static const char *emul_event_to_string(uint32_t emul_event)
{
    switch (emul_event) {
    case EMUL_READER_INSERT:
        return "EMUL_READER_INSERT";
    case EMUL_READER_REMOVE:
        return "EMUL_READER_REMOVE";
    case EMUL_CARD_INSERT:
        return "EMUL_CARD_INSERT";
    case EMUL_CARD_REMOVE:
        return "EMUL_CARD_REMOVE";
    case EMUL_GUEST_APDU:
        return "EMUL_GUEST_APDU";
    case EMUL_RESPONSE_APDU:
        return "EMUL_RESPONSE_APDU";
    case EMUL_ERROR:
        return "EMUL_ERROR";
    }
    return "UNKNOWN";
}

typedef struct EmulEvent {
    QSIMPLEQ_ENTRY(EmulEvent) entry;
    union {
        struct {
            uint32_t type;
        } gen;
        struct {
            uint32_t type;
            uint64_t code;
        } error;
        struct {
            uint32_t type;
            uint32_t len;
            uint8_t data[];
        } data;
    } p;
} EmulEvent;

#define MAX_ATR_SIZE 40
struct EmulatedState {
    CCIDCardState base;
    uint8_t  debug;
    char    *backend_str;
    uint32_t backend;
    char    *cert1;
    char    *cert2;
    char    *cert3;
    char    *db;
    uint8_t  atr[MAX_ATR_SIZE];
    uint8_t  atr_length;
    QSIMPLEQ_HEAD(, EmulEvent) event_list;
    QemuMutex event_list_mutex;
    QemuThread event_thread_id;
    VReader *reader;
    QSIMPLEQ_HEAD(, EmulEvent) guest_apdu_list;
    QemuMutex vreader_mutex; /* and guest_apdu_list mutex */
    QemuMutex handle_apdu_mutex;
    QemuCond handle_apdu_cond;
    EventNotifier notifier;
    int      quit_apdu_thread;
    QemuThread apdu_thread_id;
};

static void emulated_apdu_from_guest(CCIDCardState *base,
    const uint8_t *apdu, uint32_t len)
{
    EmulatedState *card = EMULATED_CCID_CARD(base);
    EmulEvent *event = (EmulEvent *)g_malloc(sizeof(EmulEvent) + len);

    assert(event);
    event->p.data.type = EMUL_GUEST_APDU;
    event->p.data.len = len;
    memcpy(event->p.data.data, apdu, len);
    qemu_mutex_lock(&card->vreader_mutex);
    QSIMPLEQ_INSERT_TAIL(&card->guest_apdu_list, event, entry);
    qemu_mutex_unlock(&card->vreader_mutex);
    qemu_mutex_lock(&card->handle_apdu_mutex);
    qemu_cond_signal(&card->handle_apdu_cond);
    qemu_mutex_unlock(&card->handle_apdu_mutex);
}

static const uint8_t *emulated_get_atr(CCIDCardState *base, uint32_t *len)
{
    EmulatedState *card = EMULATED_CCID_CARD(base);

    *len = card->atr_length;
    return card->atr;
}

static void emulated_push_event(EmulatedState *card, EmulEvent *event)
{
    qemu_mutex_lock(&card->event_list_mutex);
    QSIMPLEQ_INSERT_TAIL(&(card->event_list), event, entry);
    qemu_mutex_unlock(&card->event_list_mutex);
    event_notifier_set(&card->notifier);
}

static void emulated_push_type(EmulatedState *card, uint32_t type)
{
    EmulEvent *event = g_new(EmulEvent, 1);

    assert(event);
    event->p.gen.type = type;
    emulated_push_event(card, event);
}

static void emulated_push_error(EmulatedState *card, uint64_t code)
{
    EmulEvent *event = g_new(EmulEvent, 1);

    assert(event);
    event->p.error.type = EMUL_ERROR;
    event->p.error.code = code;
    emulated_push_event(card, event);
}

static void emulated_push_data_type(EmulatedState *card, uint32_t type,
    const uint8_t *data, uint32_t len)
{
    EmulEvent *event = (EmulEvent *)g_malloc(sizeof(EmulEvent) + len);

    assert(event);
    event->p.data.type = type;
    event->p.data.len = len;
    memcpy(event->p.data.data, data, len);
    emulated_push_event(card, event);
}

static void emulated_push_reader_insert(EmulatedState *card)
{
    emulated_push_type(card, EMUL_READER_INSERT);
}

static void emulated_push_reader_remove(EmulatedState *card)
{
    emulated_push_type(card, EMUL_READER_REMOVE);
}

static void emulated_push_card_insert(EmulatedState *card,
    const uint8_t *atr, uint32_t len)
{
    emulated_push_data_type(card, EMUL_CARD_INSERT, atr, len);
}

static void emulated_push_card_remove(EmulatedState *card)
{
    emulated_push_type(card, EMUL_CARD_REMOVE);
}

static void emulated_push_response_apdu(EmulatedState *card,
    const uint8_t *apdu, uint32_t len)
{
    emulated_push_data_type(card, EMUL_RESPONSE_APDU, apdu, len);
}

#define APDU_BUF_SIZE 270
static void *handle_apdu_thread(void* arg)
{
    EmulatedState *card = arg;
    uint8_t recv_data[APDU_BUF_SIZE];
    int recv_len;
    VReaderStatus reader_status;
    EmulEvent *event;

    while (1) {
        qemu_mutex_lock(&card->handle_apdu_mutex);
        qemu_cond_wait(&card->handle_apdu_cond, &card->handle_apdu_mutex);
        qemu_mutex_unlock(&card->handle_apdu_mutex);
        if (card->quit_apdu_thread) {
            card->quit_apdu_thread = 0; /* debugging */
            break;
        }
        qemu_mutex_lock(&card->vreader_mutex);
        while (!QSIMPLEQ_EMPTY(&card->guest_apdu_list)) {
            event = QSIMPLEQ_FIRST(&card->guest_apdu_list);
            assert((unsigned long)event > 1000);
            QSIMPLEQ_REMOVE_HEAD(&card->guest_apdu_list, entry);
            if (event->p.data.type != EMUL_GUEST_APDU) {
                DPRINTF(card, 1, "unexpected message in handle_apdu_thread\n");
                g_free(event);
                continue;
            }
            if (card->reader == NULL) {
                DPRINTF(card, 1, "reader is NULL\n");
                g_free(event);
                continue;
            }
            recv_len = sizeof(recv_data);
            reader_status = vreader_xfr_bytes(card->reader,
                    event->p.data.data, event->p.data.len,
                    recv_data, &recv_len);
            DPRINTF(card, 2, "got back apdu of length %d\n", recv_len);
            if (reader_status == VREADER_OK) {
                emulated_push_response_apdu(card, recv_data, recv_len);
            } else {
                emulated_push_error(card, reader_status);
            }
            g_free(event);
        }
        qemu_mutex_unlock(&card->vreader_mutex);
    }
    return NULL;
}

static void *event_thread(void *arg)
{
    int atr_len = MAX_ATR_SIZE;
    uint8_t atr[MAX_ATR_SIZE];
    VEvent *event = NULL;
    EmulatedState *card = arg;

    while (1) {
        const char *reader_name;

        event = vevent_wait_next_vevent();
        if (event == NULL || event->type == VEVENT_LAST) {
            break;
        }
        if (event->type != VEVENT_READER_INSERT) {
            if (card->reader == NULL && event->reader != NULL) {
                /* Happens after device_add followed by card remove or insert.
                 * XXX: create synthetic add_reader events if vcard_emul_init
                 * already called, which happens if device_del and device_add
                 * are called */
                card->reader = vreader_reference(event->reader);
            } else {
                if (event->reader != card->reader) {
                    fprintf(stderr,
                        "ERROR: wrong reader: quiting event_thread\n");
                    break;
                }
            }
        }
        switch (event->type) {
        case VEVENT_READER_INSERT:
            /* TODO: take a specific reader. i.e. track which reader
             * we are seeing here, check it is the one we want (the first,
             * or by a particular name), and ignore if we don't want it.
             */
            reader_name = vreader_get_name(event->reader);
            if (card->reader != NULL) {
                DPRINTF(card, 2, "READER INSERT - replacing %s with %s\n",
                    vreader_get_name(card->reader), reader_name);
                qemu_mutex_lock(&card->vreader_mutex);
                vreader_free(card->reader);
                qemu_mutex_unlock(&card->vreader_mutex);
                emulated_push_reader_remove(card);
            }
            qemu_mutex_lock(&card->vreader_mutex);
            DPRINTF(card, 2, "READER INSERT %s\n", reader_name);
            card->reader = vreader_reference(event->reader);
            qemu_mutex_unlock(&card->vreader_mutex);
            emulated_push_reader_insert(card);
            break;
        case VEVENT_READER_REMOVE:
            DPRINTF(card, 2, " READER REMOVE: %s\n",
                    vreader_get_name(event->reader));
            qemu_mutex_lock(&card->vreader_mutex);
            vreader_free(card->reader);
            card->reader = NULL;
            qemu_mutex_unlock(&card->vreader_mutex);
            emulated_push_reader_remove(card);
            break;
        case VEVENT_CARD_INSERT:
            /* get the ATR (intended as a response to a power on from the
             * reader */