Revision ccec44563b18a0ce90e2d4f332784b3cb25c8e9c authored by Paul Mackerras on 05 March 2016, 08:34:39 UTC, committed by Paul Mackerras on 08 March 2016, 02:36:42 UTC
Thomas Huth discovered that a guest could cause a hard hang of a host CPU by setting the Instruction Authority Mask Register (IAMR) to a suitable value. It turns out that this is because when the code was added to context-switch the new special-purpose registers (SPRs) that were added in POWER8, we forgot to add code to ensure that they were restored to a sane value on guest exit. This adds code to set those registers where a bad value could compromise the execution of the host kernel to a suitable neutral value on guest exit. Cc: stable@vger.kernel.org # v3.14+ Fixes: b005255e12a3 Reported-by: Thomas Huth <thuth@redhat.com> Reviewed-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Paul Mackerras <paulus@samba.org>
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| File | Mode | Size |
|---|---|---|
| .gitignore | -rw-r--r-- | 42 bytes |
| Makefile | -rw-r--r-- | 413 bytes |
| genksyms.c | -rw-r--r-- | 22.4 KB |
| genksyms.h | -rw-r--r-- | 2.7 KB |
| keywords.gperf | -rw-r--r-- | 1.6 KB |
| keywords.hash.c_shipped | -rw-r--r-- | 8.6 KB |
| lex.l | -rw-r--r-- | 9.4 KB |
| lex.lex.c_shipped | -rw-r--r-- | 57.1 KB |
| parse.tab.c_shipped | -rw-r--r-- | 72.6 KB |
| parse.tab.h_shipped | -rw-r--r-- | 3.4 KB |
| parse.y | -rw-r--r-- | 11.1 KB |
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