From: Rusty Russell <rusty@rustcorp.com.au>
To: "lkml" <linux-kernel@vger.kernel.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Subject: [PATCH 07/29] lguest: suppress PS/2 keyboard polling.
Date: Fri, 6 Feb 2015 15:51:50 +1030 [thread overview]
Message-ID: <1423200112-5354-8-git-send-email-rusty@rustcorp.com.au> (raw)
In-Reply-To: <1423200112-5354-1-git-send-email-rusty@rustcorp.com.au>
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>
---
tools/lguest/lguest.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/lguest/lguest.c b/tools/lguest/lguest.c
index b2217657f62c..485fe13db12e 100644
--- a/tools/lguest/lguest.c
+++ b/tools/lguest/lguest.c
@@ -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.
--
2.1.0
next prev parent reply other threads:[~2015-02-06 5:23 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-02-06 5:21 [PATCH 00/29] lguest virtio PCI 1.0 adaptation Rusty Russell
2015-02-06 5:21 ` [PATCH 01/29] lguest: have --rng read from /dev/urandom not /dev/random Rusty Russell
2015-02-06 5:21 ` [PATCH 02/29] lguest: add operations to get/set a register from the Launcher Rusty Russell
2015-02-06 5:21 ` [PATCH 03/29] lguest: write more information to userspace about pending traps Rusty Russell
2015-02-06 5:21 ` [PATCH 04/29] lguest: add infrastructure for userspace to deliver a trap to the guest Rusty Russell
2015-02-06 5:21 ` [PATCH 05/29] lguest: add infrastructure to check mappings Rusty Russell
2015-02-06 5:21 ` [PATCH 06/29] lguest: send trap 13 through to userspace Rusty Russell
2015-02-06 5:21 ` Rusty Russell [this message]
2015-02-06 5:21 ` [PATCH 08/29] lguest: don't disable iospace Rusty Russell
2015-02-06 5:21 ` [PATCH 09/29] lguest: add iomem region, where guest page faults get sent to userspace Rusty Russell
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