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lguest: suppress PS/2 keyboard polling.

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While hacking on getting I/O out to the lguest launcher, I noticed
that returning 0xFF for the PS/2 keyboard status made it spin for a
while thinking there was a key pending.  Fix this by returning 1
instead of 0xFF.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This commit is contained in:
Rusty Russell 2015-02-11 15:15:10 +10:30
parent c565650b10
commit 48fd6b71d6
1 changed files with 4 additions and 0 deletions
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4
tools/lguest/lguest.c
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@ -1259,6 +1259,10 @@ static void emulate_insn(const u8 insn[])
else
mask = 0xFFFFFFFF;
/* This is the PS/2 keyboard status; 1 means ready for output */
if (port == 0x64)
val = 1;
/*
* If it was an "IN" instruction, they expect the result to be read
* into %eax, so we change %eax.