diff options
| author | jhb <jhb@FreeBSD.org> | 2008-09-11 21:42:11 +0000 |
|---|---|---|
| committer | jhb <jhb@FreeBSD.org> | 2008-09-11 21:42:11 +0000 |
| commit | 1d4a561a281b386aeefb1c4827cf8fe6c86f21d0 (patch) | |
| tree | c9d1712fe0e9f4587422020efab72df18a87a3dc /sys/i386 | |
| parent | 5b5d402e310bfeb84d4bc66d726e9ec45b26b6dd (diff) | |
| download | FreeBSD-src-1d4a561a281b386aeefb1c4827cf8fe6c86f21d0.zip FreeBSD-src-1d4a561a281b386aeefb1c4827cf8fe6c86f21d0.tar.gz | |
Add a 'hw.pci.mcfg' tunable. It can be set to 0 to disable memory-mapped
PCI config access.
Diffstat (limited to 'sys/i386')
| -rw-r--r-- | sys/i386/pci/pci_cfgreg.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/sys/i386/pci/pci_cfgreg.c b/sys/i386/pci/pci_cfgreg.c index 50ff320..3c41ba7 100644 --- a/sys/i386/pci/pci_cfgreg.c +++ b/sys/i386/pci/pci_cfgreg.c @@ -36,6 +36,7 @@ __FBSDID("$FreeBSD$"); #include <sys/systm.h> #include <sys/bus.h> #include <sys/lock.h> +#include <sys/kernel.h> #include <sys/mutex.h> #include <sys/malloc.h> #include <sys/queue.h> @@ -81,6 +82,8 @@ static uint32_t pcie_badslots; static int cfgmech; static int devmax; static struct mtx pcicfg_mtx; +static int mcfg_enable = 1; +TUNABLE_INT("hw.pci.mcfg", &mcfg_enable); static uint32_t pci_docfgregread(int bus, int slot, int func, int reg, int bytes); @@ -522,6 +525,9 @@ pcie_cfgregopen(uint64_t base, uint8_t minbus, uint8_t maxbus) uint32_t val1, val2; int i, slot; + if (!mcfg_enable) + return (0); + if (minbus != 0) return (0); |
