>Number: 178357 >Category: amd64 >Synopsis: [patch] export CPU physical and virtual address sizes in >sysctl oids using do_cpuid >Confidential: no >Severity: non-critical >Priority: low >Responsible: freebsd-amd64 >State: open >Quarter: >Keywords: >Date-Required: >Class: change-request >Submitter-Id: current-users >Arrival-Date: Sun May 05 22:50:00 UTC 2013 >Closed-Date: >Last-Modified: >Originator: Sofian Brabez >Release: FreeBSD 10.0-CURRENT amd64 >Organization: >Environment: System: FreeBSD ogoshi.lan 10.0-CURRENT FreeBSD 10.0-CURRENT #3 r250287M: Sun May 5 21:59:15 CEST 2013 r...@ogoshi.lan:/usr/obj/usr/home/sbz/freebsd/svn/src/sys/GENERIC amd64
>Description: This patch export CPU Physical and Virtual address sizes through the sysctl interface using do_cpuid function. It also patch the sys/modules/linprocfs module add this information in the /usr/compat/linux/proc/cpuinfo output like it's done in Linux /proc/cpuinfo. More details can be found here: http://people.freebsd.org/~sbz/cpu/ >How-To-Repeat: >Fix: Apply the given patch. --- address_sizes.diff begins here --- Index: amd64/amd64/identcpu.c =================================================================== --- amd64/amd64/identcpu.c (revision 250287) +++ amd64/amd64/identcpu.c (working copy) @@ -109,6 +109,12 @@ SYSCTL_INT(_hw, OID_AUTO, clockrate, CTLFLAG_RD, &hw_clockrate, 0, "CPU instruction clock rate"); +SYSCTL_UINT(_machdep, OID_AUTO, cpu_physical_address_bits, CTLFLAG_RD, + &cpu_pma_bits, 0, "CPU physical address bits"); + +SYSCTL_UINT(_machdep, OID_AUTO, cpu_virtual_address_bits, CTLFLAG_RD, + &cpu_vma_bits, 0, "CPU virtual address bits"); + static eventhandler_tag tsc_post_tag; static char cpu_brand[48]; @@ -516,6 +522,16 @@ cpu_feature = regs[3]; cpu_feature2 = regs[2]; + /* Intel CPUID Specification chapter 5.2.7 + * eax=0x80000008 + * */ + do_cpuid(0x80000008, regs); + + /* upper bits are virtual size */ + cpu_vma_bits = ((regs[0] >> 8) & 0xFF); + /* lower bits are physical size */ + cpu_pma_bits = (regs[0] & 0xFF); + /* * Clear "Limit CPUID Maxval" bit and get the largest standard CPUID * function number again if it is set from BIOS. It is necessary Index: amd64/amd64/initcpu.c =================================================================== --- amd64/amd64/initcpu.c (revision 250287) +++ amd64/amd64/initcpu.c (working copy) @@ -66,10 +66,12 @@ u_int cpu_high; /* Highest arg to CPUID */ u_int cpu_exthigh; /* Highest arg to extended CPUID */ u_int cpu_id; /* Stepping ID */ +u_int cpu_pma_bits; /* CPU physical address bits */ u_int cpu_procinfo; /* HyperThreading Info / Brand Index / CLFUSH */ u_int cpu_procinfo2; /* Multicore info */ char cpu_vendor[20]; /* CPU Origin code */ u_int cpu_vendor_id; /* CPU vendor ID */ +u_int cpu_vma_bits; /* CPU virtual address bits */ u_int cpu_fxsr; /* SSE enabled */ u_int cpu_mxcsr_mask; /* Valid bits in mxcsr */ u_int cpu_clflush_line_size = 32; Index: amd64/include/md_var.h =================================================================== --- amd64/include/md_var.h (revision 250287) +++ amd64/include/md_var.h (working copy) @@ -54,10 +54,12 @@ extern u_int cpu_id; extern u_int cpu_max_ext_state_size; extern u_int cpu_mxcsr_mask; +extern u_int cpu_pma_bits; extern u_int cpu_procinfo; extern u_int cpu_procinfo2; extern char cpu_vendor[]; extern u_int cpu_vendor_id; +extern u_int cpu_vma_bits; extern char ctx_switch_xsave[]; extern char kstack[]; extern char sigcode[]; Index: compat/linprocfs/linprocfs.c =================================================================== --- compat/linprocfs/linprocfs.c (revision 250287) +++ compat/linprocfs/linprocfs.c (working copy) @@ -310,6 +310,12 @@ fqmhz, fqkhz, fqmhz, fqkhz); } + if (cpu_vma_bits != 0 && cpu_vma_bits != 0) { + sbuf_printf(sb, + "address sizes\t: %u bits physical, %u bits virtual\n", + cpu_pma_bits, cpu_vma_bits); + } + return (0); } #endif /* __i386__ || __amd64__ */ --- address_sizes.diff ends here --- >Release-Note: >Audit-Trail: >Unformatted: _______________________________________________ freebsd-amd64@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-amd64 To unsubscribe, send any mail to "freebsd-amd64-unsubscr...@freebsd.org"
