Commit c99f5f1d authored by Li Qiang's avatar Li Qiang Committed by Philippe Mathieu-Daudé
Browse files

tests: fw_cfg: add a function to get the fw_cfg file 



This is useful to write qtest about fw_cfg file entry.

Signed-off-by: default avatarLi Qiang <liq3ea@163.com>
Acked-by: default avatarThomas Huth <thuth@redhat.com>
Tested-by: default avatarThomas Huth <thuth@redhat.com>
Reviewed-by: default avatarPhilippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: default avatarPhilippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190424140643.62457-3-liq3ea@163.com>
Signed-off-by: default avatarPhilippe Mathieu-Daudé <philmd@redhat.com>
parent 7a44091d

tests/libqos/fw_cfg.c

+45 −0
Original line number Diff line number Diff line
@@ -16,6 +16,7 @@ 
#include "libqos/fw_cfg.h"

#include "libqtest.h"

#include "qemu/bswap.h"

#include "hw/nvram/fw_cfg.h"



void qfw_cfg_select(QFWCFG *fw_cfg, uint16_t key)

{
@@ -59,6 +60,50 @@ static void mm_fw_cfg_select(QFWCFG *fw_cfg, uint16_t key) 
    qtest_writew(fw_cfg->qts, fw_cfg->base, key);

}



/*

 * The caller need check the return value. When the return value is

 * nonzero, it means that some bytes have been transferred.

 *

 * If the fw_cfg file in question is smaller than the allocated & passed-in

 * buffer, then the buffer has been populated only in part.

 *

 * If the fw_cfg file in question is larger than the passed-in

 * buffer, then the return value explains how much room would have been

 * necessary in total. And, while the caller's buffer has been fully

 * populated, it has received only a starting slice of the fw_cfg file.

 */

size_t qfw_cfg_get_file(QFWCFG *fw_cfg, const char *filename,

                      void *data, size_t buflen)

{

    uint32_t count;

    uint32_t i;

    unsigned char *filesbuf = NULL;

    size_t dsize;

    FWCfgFile *pdir_entry;

    size_t filesize = 0;



    qfw_cfg_get(fw_cfg, FW_CFG_FILE_DIR, &count, sizeof(count));

    count = be32_to_cpu(count);

    dsize = sizeof(uint32_t) + count * sizeof(struct fw_cfg_file);

    filesbuf = g_malloc(dsize);

    qfw_cfg_get(fw_cfg, FW_CFG_FILE_DIR, filesbuf, dsize);

    pdir_entry = (FWCfgFile *)(filesbuf + sizeof(uint32_t));

    for (i = 0; i < count; ++i, ++pdir_entry) {

        if (!strcmp(pdir_entry->name, filename)) {

            uint32_t len = be32_to_cpu(pdir_entry->size);

            uint16_t sel = be16_to_cpu(pdir_entry->select);

            filesize = len;

            if (len > buflen) {

                len = buflen;

            }

            qfw_cfg_get(fw_cfg, sel, data, len);

            break;

        }

    }

    g_free(filesbuf);

    return filesize;

}



static void mm_fw_cfg_read(QFWCFG *fw_cfg, void *data, size_t len)

{

    uint8_t *ptr = data;

tests/libqos/fw_cfg.h

+2 −0
Original line number Diff line number Diff line
@@ -31,6 +31,8 @@ void qfw_cfg_get(QFWCFG *fw_cfg, uint16_t key, void *data, size_t len); 
uint16_t qfw_cfg_get_u16(QFWCFG *fw_cfg, uint16_t key);

uint32_t qfw_cfg_get_u32(QFWCFG *fw_cfg, uint16_t key);

uint64_t qfw_cfg_get_u64(QFWCFG *fw_cfg, uint16_t key);

size_t qfw_cfg_get_file(QFWCFG *fw_cfg, const char *filename,

                        void *data, size_t buflen);



QFWCFG *mm_fw_cfg_init(QTestState *qts, uint64_t base);

void mm_fw_cfg_uninit(QFWCFG *fw_cfg);