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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: Li Qiang <liq3ea@163.com>
Acked-by: Thomas Huth <thuth@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Tested-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Message-Id: <20190424140643.62457-3-liq3ea@163.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
This commit is contained in:
Li Qiang 2019-04-24 07:06:40 -07:00 committed by Philippe Mathieu-Daudé
parent 7a44091d48
commit c99f5f1dd4
2 changed files with 47 additions and 0 deletions
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45
tests/libqos/fw_cfg.c
View File

@ -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;

2
tests/libqos/fw_cfg.h
View File

@ -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);