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| From: | Paolo Bonzini |
| Subject: | Re: [PATCH-for-5.0 1/2] hw/acpi/piix4: Add 'system-hotplug-support' property |
| Date: | Mon, 23 Mar 2020 09:05:06 +0100 |
| User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.5.0 |
On 22/03/20 17:27, Philippe Mathieu-Daudé wrote: >>> >> That 'ugly' is typically used within QEMU to deal with such things >> probably due to its low complexity. > > OK. Can you point me to the documentation for this feature? I can find > reference of GPE in the ICH9, but I can't find where this IO address on > the PIIX4 comes from: > > #define GPE_BASE 0xafe0 It's made up. The implementation is placed in PIIX4_PM because it is referenced by the ACPI tables. Real hardware would probably place this in the ACPI embedded controller or in the BMC. Paolo
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