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| author | cinap_lenrek <cinap_lenrek@felloff.net> | 2020-11-21 16:17:20 +0100 |
|---|---|---|
| committer | cinap_lenrek <cinap_lenrek@felloff.net> | 2020-11-21 16:17:20 +0100 |
| commit | e6684dbfda0507565f44967680b850b35a5b4f93 (patch) | |
| tree | 96af6242665496f5aefccf90cccff65cabd4e95d | |
| parent | c5d08a602c35ac24b7c7ccfe5b53c8dfa12ef94e (diff) | |
| download | plan9front-e6684dbfda0507565f44967680b850b35a5b4f93.tar.xz | |
pc, pc64: disable all pci devices for /dev/reboot
Make sure all pci busmaster activity is disabled,
including MSI/MSI-X interrupts, before switching
control to the new kernel.
| -rw-r--r-- | sys/src/9/pc/main.c | 4 | ||||
| -rw-r--r-- | sys/src/9/pc64/main.c | 4 |
2 files changed, 8 insertions, 0 deletions
diff --git a/sys/src/9/pc/main.c b/sys/src/9/pc/main.c index 39649d164..f5937b6be 100644 --- a/sys/src/9/pc/main.c +++ b/sys/src/9/pc/main.c @@ -5,6 +5,7 @@ #include "dat.h" #include "fns.h" #include "io.h" +#include "../port/pci.h" #include "ureg.h" #include "pool.h" #include "rebootcode.i" @@ -689,5 +690,8 @@ reboot(void *entry, void *code, ulong size) /* shutdown devices */ chandevshutdown(); + /* disable pci devices */ + pcireset(); + rebootjump((ulong)entry & ~0xF0000000UL, PADDR(code), size); } diff --git a/sys/src/9/pc64/main.c b/sys/src/9/pc64/main.c index 53bcd8887..d440656fa 100644 --- a/sys/src/9/pc64/main.c +++ b/sys/src/9/pc64/main.c @@ -5,6 +5,7 @@ #include "dat.h" #include "fns.h" #include "io.h" +#include "../port/pci.h" #include "ureg.h" #include "pool.h" #include "rebootcode.i" @@ -286,6 +287,9 @@ reboot(void *entry, void *code, ulong size) /* shutdown devices */ chandevshutdown(); + /* disable pci devices */ + pcireset(); + rebootjump((uintptr)entry & (ulong)~0xF0000000UL, PADDR(code), size); } |