Garrett, On Thu, 9 May 2019, Kirkendall, Garrett wrote:
A: Because it messes up the order in which people normally read text. Q: Why is top-posting such a bad thing? A: Top-posting. Q: What is the most annoying thing in e-mail? A: No. Q: Should I include quotations after my reply? http://daringfireball.net/2007/07/on_top Also please break the lines around 78 chars. > 1. Is it correct to probe the 8259 before it is initialized by the > kernel? The 8259 will not respond properly to the probe unless it is > properly initialized. So far the kernel relied on the BIOS to initialize 8259 > 2. Should IOAPIC interrupts 0-15 require the legacy PIC be available and > initialized by the BIOS? Unless the platform explicitely states that there is no legacy PIC, which is true for some MID and HV guest systems. > 2. The kernel will not boot if there is no legacy 8259 PIC even if all > the other factors stated are provided. Hmm? what other factors? > I want to understand why a preinitialized 8259 is a requirement for a > system configured to use the IOAPIC? Mostly historical reasons and the whole PIC/IOAPIC thing has been a fragile nightmare forever, so I'm reluctant to do any extra work there which might break older machines. Thanks, tglx
