| commit | d536b1f86591fb081c7a56eab04e711eb4dab951 | |
| author | Jan Kratochvil <jan.kratochvil@redhat.com> | |
| Tue, 22 Jul 2008 12:00:47 +0000 (22 14:00 +0200) | ||
| committer | Ingo Molnar <mingo@elte.hu> | |
| Tue, 22 Jul 2008 12:16:37 +0000 (22 14:16 +0200) | ||
| tree | 1b9a1c248d773af930347e08d292aa23a71729ed | treesnapshot (tar.gz zip) |
| parent | 77be1fabd024b37423d12f832b1fbdb95dbdf494 | commitdiff |
x86: fix crash due to missing debugctlmsr on AMD K6-3
currently if you use PTRACE_SINGLEBLOCK on AMD K6-3 (i586) it will crash.
Kernel now wrongly assumes existing DEBUGCTLMSR MSR register there.
Removed the assumption also for some other non-K6 CPUs but I am not sure there
(but it can only bring small inefficiency there if my assumption is wrong).
Based on info from Roland McGrath, Chuck Ebbert and Mikulas Patocka.
More info at:
https://bugzilla.redhat.com/show_bug.cgi?id=456175
Signed-off-by: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
currently if you use PTRACE_SINGLEBLOCK on AMD K6-3 (i586) it will crash.
Kernel now wrongly assumes existing DEBUGCTLMSR MSR register there.
Removed the assumption also for some other non-K6 CPUs but I am not sure there
(but it can only bring small inefficiency there if my assumption is wrong).
Based on info from Roland McGrath, Chuck Ebbert and Mikulas Patocka.
More info at:
https://bugzilla.redhat.com/show_bug.cgi?id=456175
Signed-off-by: Jan Kratochvil <jan.kratochvil@redhat.com>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
| arch/x86/Kconfig.cpu | diffblobblamehistory |