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| author | Jiri Kosina <jkosina@suse.cz> | 2010-04-23 04:08:44 +0400 |
|---|---|---|
| committer | Jiri Kosina <jkosina@suse.cz> | 2010-04-23 04:08:44 +0400 |
| commit | 6c9468e9eb1252eaefd94ce7f06e1be9b0b641b1 (patch) | |
| tree | 797676a336b050bfa1ef879377c07e541b9075d6 /drivers/lguest/x86/core.c | |
| parent | 4cb3ca7cd7e2cae8d1daf5345ec99a1e8502cf3f (diff) | |
| parent | c81eddb0e3728661d1585fbc564449c94165cc36 (diff) | |
| download | linux-6c9468e9eb1252eaefd94ce7f06e1be9b0b641b1.tar.xz | |
Merge branch 'master' into for-next
Diffstat (limited to 'drivers/lguest/x86/core.c')
| -rw-r--r-- | drivers/lguest/x86/core.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/lguest/x86/core.c b/drivers/lguest/x86/core.c index fb2b7ef7868e..b4eb675a807e 100644 --- a/drivers/lguest/x86/core.c +++ b/drivers/lguest/x86/core.c @@ -288,6 +288,18 @@ static int emulate_insn(struct lg_cpu *cpu) insn = lgread(cpu, physaddr, u8); /* + * Around 2.6.33, the kernel started using an emulation for the + * cmpxchg8b instruction in early boot on many configurations. This + * code isn't paravirtualized, and it tries to disable interrupts. + * Ignore it, which will Mostly Work. + */ + if (insn == 0xfa) { + /* "cli", or Clear Interrupt Enable instruction. Skip it. */ + cpu->regs->eip++; + return 1; + } + + /* * 0x66 is an "operand prefix". It means it's using the upper 16 bits * of the eax register. */ |