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| author | Robert Richter <robert.richter@amd.com> | 2008-08-22 20:23:38 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@elte.hu> | 2008-08-23 17:39:31 +0200 |
| commit | 91ede005d72df60d6b3f252be177a4743a6aa46a (patch) | |
| tree | 6427703ae3c0768debe23ccc2c7c7470be35658f /block/blk-barrier.c | |
| parent | 9b4e27b52853c5da77e61a4e36fbc40688b7a829 (diff) | |
x86: fix: make PCI ECS for AMD CPUs hotplug capable
Until now, PCI ECS setup was performed at boot time only and for cpus
that are enabled then. This patch fixes this and adds cpu hotplug.
Tests sequence (check if ECS bit is set when bringing cpu online again):
# ( perl -e 'sysseek(STDIN, 0xC001001F, 0)'; hexdump -n 8 -e '2/4 "%08x " "\n"' ) < /dev/cpu/1/msr
00000008 00404010
# ( perl -e 'sysseek(STDOUT, 0xC001001F, 0); print pack "l*", 8, 0x00400010' ) > /dev/cpu/1/msr
# ( perl -e 'sysseek(STDIN, 0xC001001F, 0)'; hexdump -n 8 -e '2/4 "%08x " "\n"' ) < /dev/cpu/1/msr
00000008 00400010
# echo 0 > /sys/devices/system/cpu/cpu1/online
# echo 1 > /sys/devices/system/cpu/cpu1/online
# ( perl -e 'sysseek(STDIN, 0xC001001F, 0)'; hexdump -n 8 -e '2/4 "%08x " "\n"' ) < /dev/cpu/1/msr
00000008 00404010
Reported-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'block/blk-barrier.c')
0 files changed, 0 insertions, 0 deletions