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author | Stefano Stabellini <stefano.stabellini@eu.citrix.com> | 2013-04-19 18:24:03 +0100 |
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committer | Ian Campbell <ian.campbell@citrix.com> | 2013-04-22 12:34:10 +0100 |
commit | 071c61e7367987a9f71dc18c3c58a5dba659a5c8 (patch) | |
tree | 8452deeb0799f5a87f7074932b145f923d2fdfd1 /install.sh | |
parent | b09ea2a57899624ba8da6b2efdf1901cda847616 (diff) | |
download | xen-071c61e7367987a9f71dc18c3c58a5dba659a5c8.tar.gz xen-071c61e7367987a9f71dc18c3c58a5dba659a5c8.tar.bz2 xen-071c61e7367987a9f71dc18c3c58a5dba659a5c8.zip |
xen/arm: do not use is_running to decide whether we can write directly to the LR registers
During context switch is_running is set for the next vcpu before the
gic state is actually saved.
This leads to possible nasty races when interrupts need to be injected
after is_running is set to the next vcpu but before the currently
running gic state has been saved from the previous vcpu.
Use current instead of is_running to check which one is the currently
running vcpu: set_current is called right before __context_switch and
schedule_tail with interrupt disabled.
Re-enabled interrupts after ctxt_switch_from, so that all the context
switch saving functions don't have to worry about receiving interrupts
while saving state.
Signed-off-by: Stefano Stabellini <stefano.stabellini@eu.citrix.com>
Acked-by: Ian Campbell <ian.campbell@citrix.com>
Diffstat (limited to 'install.sh')
0 files changed, 0 insertions, 0 deletions