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Always emit an error message on passthru configuration errors.

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Previously, many errors (such as the PCI device not being attached
to the ppt(4) driver) resulted in bhyve silently exiting without
starting the virtual machine.  Now any errors encountered when
configuring a virtual slot for a PCI passthru device should be noted
on stderr.

Reviewed by:	neel
Differential Revision:	https://reviews.freebsd.org/D5990
This commit is contained in:
John Baldwin 2016-04-19 20:43:05 +00:00
parent 6f39c760f8
commit cff92ffd4d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=298295
1 changed files with 34 additions and 22 deletions
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56
usr.sbin/bhyve/pci_passthru.c
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@ -43,7 +43,7 @@ __FBSDID("$FreeBSD$");
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <err.h>
#include <fcntl.h>
#include <unistd.h>
@ -483,9 +483,9 @@ init_msix_table(struct vmctx *ctx, struct passthru_softc *sc, uint64_t base)
PROT_WRITE, MAP_SHARED, memfd, start +
pi->pi_msix.pba_page_offset);
if (pi->pi_msix.pba_page == MAP_FAILED) {
printf(
"Failed to map PBA page for MSI-X on %d/%d/%d: %s\n",
b, s, f, strerror(errno));
warn(
"Failed to map PBA page for MSI-X on %d/%d/%d",
b, s, f);
return (-1);
}
}
@ -559,7 +559,7 @@ cfginitbar(struct vmctx *ctx, struct passthru_softc *sc)
if (bartype != PCIBAR_IO) {
if (((base | size) & PAGE_MASK) != 0) {
printf("passthru device %d/%d/%d BAR %d: "
warnx("passthru device %d/%d/%d BAR %d: "
"base %#lx or size %#lx not page aligned\n",
sc->psc_sel.pc_bus, sc->psc_sel.pc_dev,
sc->psc_sel.pc_func, i, base, size);
@ -617,11 +617,17 @@ cfginit(struct vmctx *ctx, struct pci_devinst *pi, int bus, int slot, int func)
sc->psc_sel.pc_dev = slot;
sc->psc_sel.pc_func = func;
if (cfginitmsi(sc) != 0)
if (cfginitmsi(sc) != 0) {
warnx("failed to initialize MSI for PCI %d/%d/%d",
bus, slot, func);
goto done;
}
if (cfginitbar(ctx, sc) != 0)
if (cfginitbar(ctx, sc) != 0) {
warnx("failed to initialize BARs for PCI %d/%d/%d",
bus, slot, func);
goto done;
}
error = 0; /* success */
done:
@ -639,34 +645,45 @@ passthru_init(struct vmctx *ctx, struct pci_devinst *pi, char *opts)
memflags = vm_get_memflags(ctx);
if (!(memflags & VM_MEM_F_WIRED)) {
fprintf(stderr, "passthru requires guest memory to be wired\n");
warnx("passthru requires guest memory to be wired");
goto done;
}
if (pcifd < 0) {
pcifd = open(_PATH_DEVPCI, O_RDWR, 0);
if (pcifd < 0)
if (pcifd < 0) {
warn("failed to open %s", _PATH_DEVPCI);
goto done;
}
}
if (iofd < 0) {
iofd = open(_PATH_DEVIO, O_RDWR, 0);
if (iofd < 0)
if (iofd < 0) {
warn("failed to open %s", _PATH_DEVIO);
goto done;
}
}
if (memfd < 0) {
memfd = open(_PATH_MEM, O_RDWR, 0);
if (memfd < 0)
if (memfd < 0) {
warn("failed to open %s", _PATH_MEM);
goto done;
}
}
if (opts == NULL ||
sscanf(opts, "%d/%d/%d", &bus, &slot, &func) != 3)
sscanf(opts, "%d/%d/%d", &bus, &slot, &func) != 3) {
warnx("invalid passthru options");
goto done;
}
if (vm_assign_pptdev(ctx, bus, slot, func) != 0)
if (vm_assign_pptdev(ctx, bus, slot, func) != 0) {
warnx("PCI device at %d/%d/%d is not using the ppt(4) driver",
bus, slot, func);
goto done;
}
sc = calloc(1, sizeof(struct passthru_softc));
@ -777,10 +794,8 @@ passthru_cfgwrite(struct vmctx *ctx, int vcpu, struct pci_devinst *pi,
sc->psc_sel.pc_dev, sc->psc_sel.pc_func,
pi->pi_msi.addr, pi->pi_msi.msg_data,
pi->pi_msi.maxmsgnum);
if (error != 0) {
printf("vm_setup_pptdev_msi error %d\r\n", errno);
exit(1);
}
if (error != 0)
err(1, "vm_setup_pptdev_msi");
return (0);
}
@ -796,11 +811,8 @@ passthru_cfgwrite(struct vmctx *ctx, int vcpu, struct pci_devinst *pi,
pi->pi_msix.table[i].msg_data,
pi->pi_msix.table[i].vector_control);
if (error) {
printf("vm_setup_pptdev_msix error "
"%d\r\n", errno);
exit(1);
}
if (error)
err(1, "vm_setup_pptdev_msix");
}
}
return (0);