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path: root/src/arch/x86/cpuid.cc
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2015-01-06x86: Enable three bits in the FamilyModelStepping ECX CPUID bitfield.Gabe Black
These are for the monitor/mwait instructions, SSSE3, and XSAVE.
2015-01-06cpuid, x86: Revert "Enabling more features in CPUid"Gabe Black
That change enables CPUID bits for features that aren't implemented in gem5. If a simulated system tries to use those features because it was told it could, bad things can happen.
2014-11-23cpuid, x86: Enabling more features in CPUidAlexandru Dutu
Adding more features in the CPUid with the purpose of supporting running the KvmCPU in SE mode.
2014-11-16x86: Fix the CPUID Long Mode Address Size function.Gabe Black
The value in EAX has an 8 bit field for the linear address size and one for the physical address size when calling that function. A recent change implemented it but returned 0xff for both of those fields. That implies that linear and physical addresses are 255 bits wide which is wrong. When using the KVM CPU model this causes an error, presumably because some of those bits are actually reserved, or the CPU or kernel realizes 255 bits is a bad value. This change makes those values 48.
2014-06-13x86: add LongModeAddressSize function to cpuidJiuyue Ma
LongModeAddressSize was used by kernel 2.6.28.4 for physical address validation, if not properly implemented, PCI resource allocation may failed because of ioremap failed: - linux-2.6.28.4/arch/x86/mm/ioremap.c:27-30 27 static inline int phys_addr_valid(unsigned long addr) 28 { 29 return addr < (1UL << boot_cpu_data.x86_phys_bits); 30 } - linux-2.6.28.4/arch/x86/kernel/cpu/common.c:475-482 475 #ifdef CONFIG_X86_64 476 if (c->extended_cpuid_level >= 0x80000008) { 477 u32 eax = cpuid_eax(0x80000008); 478 479 c->x86_virt_bits = (eax >> 8) & 0xff; 480 c->x86_phys_bits = eax & 0xff; 481 } 482 #endif - linux-2.6.28.4/arch/x86/mm/ioremap.c:209-214 209 if (!phys_addr_valid(phys_addr)) { 210 printk(KERN_WARNING "ioremap: invalid physical address %llx\n", 211 (unsigned long long)phys_addr); 212 WARN_ON_ONCE(1); 213 return NULL; 214 } This patch return 0x0000ffff for LongModeAddressSize, which guarantee phys_addr_valid never failed. Committed by: Nilay Vaish <nilay@cs.wisc.edu>
2013-01-15x86 cpuid: enable clflushNilay Vaish
Note that clflush is only being enabled. It is not implemented in actual. A warning is printed if the cpu encounters a clflush instruction. We need to enable this instruction in cpuid since JRE 1.7 tests for it.
2012-07-22X86 CPUID: Return false if unknown processor familyNilay Vaish
2011-01-03Make commenting on close namespace brackets consistent.Steve Reinhardt
Ran all the source files through 'perl -pi' with this script: s|\s*(};?\s*)?/\*\s*(end\s*)?namespace\s*(\S+)\s*\*/(\s*})?|} // namespace $3|; s|\s*};?\s*//\s*(end\s*)?namespace\s*(\S+)\s*|} // namespace $2\n|; s|\s*};?\s*//\s*(\S+)\s*namespace\s*|} // namespace $1\n|; Also did a little manual editing on some of the arch/*/isa_traits.hh files and src/SConscript.
2010-05-02X86: Sometimes CPUID depends on ecx, so pass that in.Gabe Black
2009-04-19X86: Fix the ordering of the vendor string reported by CPUID.Gabe Black
2009-04-19X86: Only use %eax to select a function and look like we support sse2.Gabe Black
2009-04-19X86: Don't pretend to be an AMD CPU any more. We're not good enough at it.Gabe Black
2008-10-12X86: Implement CPUID with a magical function instead of microcode.Gabe Black