David P. Reed wrote:
Note that I can run the port 80 test once, the second time I get the hard freeze. I didn't try writing to port 70 from userspace - that one's dangerous, but the reading of it was included for a timing typical of a chipset supported device. These are all pretty consistent.I find the "read" timing from 0x80 verrrrry interesting. The write timeing is also interesting, being faster than an unused port.
Once again: reading from port 0x80 goes to the DMA page device. -hpa -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- References:
- Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: "H. Peter Anvin" <[email protected]>
- Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: Pavel Machek <[email protected]>
- Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: "H. Peter Anvin" <[email protected]>
- Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: Alan Cox <[email protected]>
- Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: Paul Rolland <[email protected]>
- Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: Rene Herman <[email protected]>
- Re: [PATCH] x86_64: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: "H. Peter Anvin" <[email protected]>
- [PATCH] x86: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: Rene Herman <[email protected]>
- Re: [PATCH] x86: fix problems due to use of "outb" to port 80 on some AMD64x2 laptops, etc.
- From: "H. Peter Anvin" <[email protected]>
- [PATCH] x86: provide a DMI based port 0x80 I/O delay override.
- From: Rene Herman <[email protected]>
- Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.
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