Date: Fri, 25 Jan 2019 10:08:29 +0000 From: bugzilla-noreply@freebsd.org To: amd64@FreeBSD.org Subject: [Bug 178357] [amd64] [patch] export CPU physical and virtual address sizes in sysctl oids using do_cpuid Message-ID: <bug-178357-17361-12Dh6kJkJ1@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-178357-17361@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=178357 Konstantin Belousov <kib@FreeBSD.org> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |kib@FreeBSD.org --- Comment #4 from Konstantin Belousov <kib@FreeBSD.org> --- Exporting CPUID values through sysctl is useless. Besides that we have cpuctl(4) which exports it using ioctl(2) and accessible by cpucontrol(8). And we have x86info in ports. So the patch would add yet another way to access something that is readily available as a single instruction. Note that virtual address width is not used for anything, and will be not until the CPUs with 5-level page tables appear. When they do, this thing would need completely different treatment at the pmap. -- You are receiving this mail because: You are the assignee for the bug.help
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