git: c8113dad7ed4 - main - Increase MAX_APIC_ID safeguard to 0x800
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Date: Thu, 27 Oct 2022 16:34:02 UTC
The branch main has been updated by emaste: URL: https://cgit.FreeBSD.org/src/commit/?id=c8113dad7ed4024376901a834fc239d754292049 commit c8113dad7ed4024376901a834fc239d754292049 Author: Ed Maste <emaste@FreeBSD.org> AuthorDate: 2022-10-20 13:04:37 +0000 Commit: Ed Maste <emaste@FreeBSD.org> CommitDate: 2022-10-27 16:33:34 +0000 Increase MAX_APIC_ID safeguard to 0x800 MAX_APIC_ID must be at least twice MAXCPU. Increase it to 0x800 so that it is possible to set MAXCPU to 512 or 1024 in a custom kernel config file. Note that increasing this limit does not itself cause any allocations to be larger; it just allows madt_parse_cpu() to process higher APIC IDs. APIC IDs may be sparse and so we can waste memory. This is independent of this change, but becomes more of an issue as the maximum APIC ID grows. This should be addressed with future work. Reviewed by: royger MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D37067 --- sys/x86/include/apicvar.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/sys/x86/include/apicvar.h b/sys/x86/include/apicvar.h index ff6bb97d7f80..28b9f83894fb 100644 --- a/sys/x86/include/apicvar.h +++ b/sys/x86/include/apicvar.h @@ -77,7 +77,7 @@ #define xAPIC_MAX_APIC_ID 0xfe #define xAPIC_ID_ALL 0xff -#define MAX_APIC_ID 0x200 +#define MAX_APIC_ID 0x800 #define APIC_ID_ALL 0xffffffff #define IOAPIC_MAX_ID xAPIC_MAX_APIC_ID