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Revert "DM: make removing vGSI capability option as local"

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This reverts commit f0de34176d.
This commit is contained in:
lijinxia 2018-06-27 14:21:05 +08:00
parent 1336f9b578
commit 257aff8565
3 changed files with 20 additions and 17 deletions
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7
devicemodel/core/main.c
View File

@ -137,6 +137,7 @@ usage(int code)
" -H: vmexit from the guest on hlt\n"
" -l: LPC device configuration\n"
" -m: memory size in MB\n"
" -M: do not hide INTx link for MSI&INTx capable ptdev\n"
" -p: pin 'vcpu' to 'hostcpu'\n"
" -P: vmexit from the guest on pause\n"
" -s: <slot,driver,configinfo> PCI slot config\n"
@ -618,6 +619,7 @@ static struct option long_options[] = {
{"kernel", required_argument, 0, 'k' },
{"ramdisk", required_argument, 0, 'r' },
{"bootargs", required_argument, 0, 'B' },
{"ptdev_msi", no_argument, 0, 'M' },
{"version", no_argument, 0, 'v' },
{"gvtargs", required_argument, 0, 'G' },
{"help", no_argument, 0, 'h' },
@ -656,7 +658,7 @@ main(int argc, char *argv[])
if (signal(SIGINT, sig_handler_term) == SIG_ERR)
fprintf(stderr, "cannot register handler for SIGINT\n");
optstr = "abehuwxACHIPSTWYvk:r:B:p:g:c:s:m:l:U:G:i:";
optstr = "abehuwxACHIMPSTWYvk:r:B:p:g:c:s:m:l:U:G:i:";
while ((c = getopt_long(argc, argv, optstr, long_options,
&option_idx)) != -1) {
switch (c) {
@ -772,6 +774,9 @@ main(int argc, char *argv[])
exit(1);
}
break;
case 'M':
ptdev_prefer_msi(false);
break;
case 'v':
print_version();
break;

29
devicemodel/hw/pci/passthrough.c
View File

@ -85,6 +85,9 @@ static int memfd = -1;
static int pciaccess_ref_cnt;
static pthread_mutex_t ref_cnt_mtx = PTHREAD_MUTEX_INITIALIZER;
/* Prefer MSI over INTx for ptdev */
static bool prefer_msi = true;
/* Not check reset capability before assign ptdev.
* Set false by default, that is, always check.
*/
@ -109,6 +112,12 @@ struct passthru_dev {
struct pci_device *phys_dev;
};
void
ptdev_prefer_msi(bool enable)
{
prefer_msi = enable;
}
void ptdev_no_reset(bool enable)
{
no_reset = enable;
@ -925,28 +934,16 @@ passthru_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
struct passthru_dev *ptdev;
struct pci_device_iterator *iter;
struct pci_device *phys_dev;
char *opt;
bool keep_gsi = false;
ptdev = NULL;
error = -EINVAL;
if (opts == NULL) {
warnx("Empty passthru options\n");
if (opts == NULL ||
sscanf(opts, "%x/%x/%x", &bus, &slot, &func) != 3) {
warnx("invalid passthru options, %s", opts);
return -EINVAL;
}
opt = strsep(&opts, ",");
if (sscanf(opt, "%x/%x/%x", &bus, &slot, &func) != 3) {
warnx("Invalid passthru options, %s", opt);
return -EINVAL;
}
while ((opt = strsep(&opts, ",")) != NULL) {
if (!strncmp(opt, "keep_gsi", 8))
keep_gsi = true;
}
if (vm_assign_ptdev(ctx, bus, slot, func) != 0) {
warnx("PCI device at %x/%x/%x is not using the pt(4) driver",
bus, slot, func);
@ -1011,7 +1008,7 @@ passthru_init(struct vmctx *ctx, struct pci_vdev *dev, char *opts)
* Forge Guest to use MSI/MSIX in this case to mitigate IRQ sharing
* issue
*/
if (error == IRQ_MSI && !keep_gsi)
if (error == IRQ_MSI && prefer_msi)
return 0;
/* Allocates the virq if ptdev only support INTx */

1
devicemodel/include/dm.h
View File

@ -48,5 +48,6 @@ int vmexit_task_switch(struct vmctx *ctx, struct vhm_request *vhm_req,
void *paddr_guest2host(struct vmctx *ctx, uintptr_t addr, size_t len);
void *dm_gpa2hva(uint64_t gpa, size_t size);
int virtio_uses_msix(void);
void ptdev_prefer_msi(bool enable);
void ptdev_no_reset(bool enable);
#endif