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  1. I wrote this "somewhere else" as well, but I thought this might be interesting here too... Haswell/Mavericks Troubles Many people with Haswell laptops (and some desktops) have been running into a new problem Apple has thrown at us. The new Mavericks kernel has power management moved down into the kernel. For this reason, my MacBookAir6,2 running Mavericks does not load AppleIntelCPUPowerManagement. In the past, we patched AppleIntelCPUPowerManagement to avoid the kernel writing to locked CPU MSRs (machine specific registers, credit RevoGirl). Some BIOSes lock some of these registers (the common one is 0xE2, I don't know if others can be locked as well). The problem is that touching these registers when they are locked causes an unexpected fault and you get a KP. It seems this KP is so early, that the kernel is unprepared to handle it, and the computer reboots. Some people have found that if they use a kernel modified for AMD systems, they are able to boot. I tried this and it indeed works. But other things break... I was able to install (using that kernel), but I couldn't boot with caches (always had to use "-f"). Booting with caches caused a KP. In addition, there was no power management. CPU was running at x24 always. But... I decided to see what I could do by building my own kernel. My main thought was to make some changes, see if I could avoid touching locked MSRs with modifications to the source code with the idea to fold the changes into a patch. So, I downloaded the kernel source from opensource.apple.com, found out how to build it (thanks google!), and tried to use it. On first try, I didn't make any changes... and I was surprised that I was able to start the installer with the newly built kernel! No changes and it just works. WTF? Turns out the sources for the kernel do not include the parts for xnu power management. Since it isn't there, it doesn't cause the problem. But of course, AppleIntelCPUPowerManagement expects for PM to be provided by the kernel, so it doesn't work. It doesn't crash, but still no power management. Since 10.8.5 does not have this change, I decided to try the (patched) AppleIntelCPUPowerManagement from 10.8.5 (v214). And that actually works. I don't really like doing rollbacks like that, but it is probably a workable solution until something better comes along. I still think it might be possible to patch the kernel to avoid the MSR writing problem. See updates below on patches. Update 2013-11-25 With some prodding by Pike's blog, I went back to my original patch that I had attempted a number of weeks ago, and I found the mistakes I had made with my patch (this was prior to building the kernel from sources). The details are on my blog here: http://racerrehabman.wordpress.com/2013/11/25/maverickshaswell-kernel-patch-for-early-reboot/ As a result, I'm now running a patched mach_kernel (not built from source, but patched from retail), MacBookPro11,2 smbios.plist, AppleIntelCPUPowerManagement.kext, ssdt.aml generated with Pike's script (plugin-type=1). Of course, AppleIntelCPUPowerManagement does not load, as all CPU power management is handled by the kernel (xcpm). In other words, it is running just as a real Haswell MacBookPro would as far as power management. The only "problem" that I can see, is that I'm not getting pstates between x8 and x24, much like the results with iMac14,2. I wonder if something is missing (taking the place of X86PlatformPlugin plists?) that the bootloader/DSDT/SSDT should be injecting to inform the kernel's xcpm behavior? More investigation is needed. I will investigate by watching the behavior of my real MacBookAir6,2 and perhaps a friend's real MacBookPro11,x. Update 2013-11-26 It appears that having a jump in pstates from idle to nominal (in this case x8 to x24) is by design. It appears to be intentional. I loaded AppleIntelCPUPowerManagementInfo.kext on my MacBookAir6,2 and it too jumps from idle (x8) to nominal (x17) with no states in between. Update 2013-12-30 By borrowing some files from a real Mavericks 10.9.1 install on a real MacBookPro11,2, I was able to achieve states in between idle and nominal: AICPUPMI: CPU P-States [ 8 (17) 24 26 29 30 31 32 33 34 ] GPU P-States [ 17 ] Note new state 17. This was booting via Clover with MacBookPro11,2 smbios and custom SSDT using ssdtPRgen.sh. In order to do this, I borrowed from the Mac: /System/Library/CoreServices/PlatformSupport.plist /System/Library/Extensions/IOPlatformPluginFamily.kext /mach_kernel (version 13.0.2, patched for xcpm) I'm not sure the kernel replacement was necessary, but I did it anyway. I think this means that when a future version of OS X arrives that has true support for MacBookPro11,2, things will work a bit better. I find it interesting that an owner of a a real MacBookPro11,2 cannot do a fresh install of 10.9.1 from the App Store and expect their machine to work as it should. Computer Specifics HP Envy 15-J063CL (Costco) i7-4700MQ @2.4Ghz, 12GB RAM HM87 chipset HD4600 graphics (1080p panel), BCM4352 ac WiFi (works with only injection) RTL8111/8168/8411 (works with RealtekRTL8111) (I am not certain that I'm keeping this laptop...) Working: - power management (see pstate results below) - booting with caches - HD4600 graphics (this computer uses eDP) (ig-platform-id=0x0a260006) - HDMI - USB3 (before *and* after sleep) - trackpad/keyboard (Synaptics) - sleep - sleep triggered by lid - shutdown/restart - backlit keyboard on/off (must be hardwired) - Camera (kind of grainy, but could be poor lighting) - display brightness (works after display sleep with PNLF DSDT patch) - works with patched AppleHDA (volume seems low) Not Working/Not Started/In progress Not Tested - Bluetooth Notes: - Fixed USB3 after sleep by switching from native AppleUSBXHCI to GenericUSBXHCI with -gux_defer_usb2 flag. - To avoid strange flicker/flash of display upon boot, make sure to use "Graphics Mode"=1920x1080x32 PStates: iMac14,2 (X86PlatformPlugin) DPCIManager PStates: 8,24,25,26,27,28,29,30,31,32 MacBookPro8,3 (ACPI_SMC_PlatformPlugin) DPCIManager PStates: 8,12,16,20,24,26,28,30,31,32 MacBookPro11,2 (xcpm, patched mach_kernel) DPCIManager PStates: 8,24,25,26,27,29,30,32,33 MacBookPro11,2 (xcpm, parts borrowed from real MacBookPro11,2 install): DPCIManager PStates: 8, 17, 24, 25, 26, 28, 29, 30, 31, 32 See my blog for perl patch for mach_kernel. Update 2014-10-18 I updated my blog and this post with the patches for the recently released Yosemite 10.10. ---- For ease of use, I'm providing the patches from my blog here. Please note these patches are only for applying to vanilla mach_kernel, not the "xcpm free" kernel for 10.9 provided as the attachment. The two techniques are mutually exclusive. Either you use "xcpm free" and old school PM, or you use patched kernel and new school (xcpm) PM. For 10.10: perl -pi -e 's|\xe2\x00\x00\x00\x02\x00\x00\x00|\x00\x00\x00\x00\x02\x00\x00\x00|g' kernel perl -pi -e 's|\xe2\x00\x00\x00\x4c\x00\x00\x00|\x00\x00\x00\x00\x4c\x00\x00\x00|g' kernel perl -pi -e 's|\xe2\x00\x00\x00\x90\x01\x00\x00|\x00\x00\x00\x00\x90\x01\x00\x00|g' kernel Please note the kernel resides at /System/Library/Kernels/kernel. For 10.9.x: perl -pi -e 's|\x74\x6c(\x48\x83\xc7\x28\x90\x8b\x05..\x5e\x00\x85\x47\xdc)\x74\x54(\x8b\x4f\xd8\x45\x85\xc0\x74\x08\x44\x39\xc1\x44\x89\xc1)\x75\x44(\x0f\x32\x89\xc0\x48\xc1\xe2\x20\x48\x09\xc2\x48\x89\x57\xf8\x48\x8b\x47\xe8\x48\x85\xc0\x74\x06\x48\xf7\xd0\x48\x21\xc2\x48\x0b\x57\xf0\x49\x89\xd1\x49\xc1\xe9\x20\x89\xd0\x8b\x4f\xd8\x4c\x89\xca)(\x0f\x30\x8b\x4f\xd8\x0f\x32\x89\xc0\x48\xc1\xe2\x20\x48\x09\xc2\x48\x89\x17\x48\x83\xc7\x30\xff\xce)\x75\x99(\x5d\xc3)\x90{7}|\x74\x73${1}\x74\x5b${2}\x75\x4b${3}\x66\x81\xf9\xe2\x00\x74\x02${4}\x75\x92${5}|g' mach_kernel For 10.8.5: perl -pi -e 's|\x74\x69(\x48\x83\xc7\x28\x90\x8b\x05\xfe\xce\x5f\x00\x85\x47\xdc)\x74\x51(\x8b\x4f\xd8\x45\x85\xc0\x74\x05\x44\x39\xc1)\x75\x44(\x0f\x32\x89\xc0\x48\xc1\xe2\x20\x48\x09\xc2\x48\x89\x57\xf8\x48\x8b\x47\xe8\x48\x85\xc0\x74\x06\x48\xf7\xd0\x48\x21\xc2\x48\x0b\x57\xf0\x49\x89\xd1\x49\xc1\xe9\x20\x89\xd0\x8b\x4f\xd8\x4c\x89\xca)(\x0f\x30\x8b\x4f\xd8\x0f\x32\x89\xc0\x48\xc1\xe2\x20\x48\x09\xc2\x48\x89\x17\x48\x83\xc7\x30\xff\xce)\x75\x9c(\x5d\xc3)\x90{7}(\x90{3})|\x74\x70${1}\x74\x58${2}\x75\x4b${3}\x66\x81\xf9\xe2\x00\x74\x02${4}\x75\x95${5}${6}|g' mach_kernel How to patch your kernel The vanilla mach_kernel is located on your USB installer after creating your USB (with whatever tool you like :-). Here's how to patch it: # in Terminal, assuming your USB is called Installer cp /Volumes/Installer/mach_kernel ~/Desktop/mach_kernel_backup cp /Volumes/Installer/mach_kernel ~/Desktop/mach_kernel cd ~/Desktop # now copy/paste one or more of the perl patches from above into Terminal perl ...[from above]... mach_kernel perl ...[from above]... mach_kernel # patched mach_kernel is now at ~/Desktop/mach_kernel sudo cp mach_kernel /Volumes/Installer/mach_kernel After you install OS X to your HDD, you will have vanilla mach_kernel on the HDD, leading to the same instant reboot problem. So, you must re-enter the OS X installer, and go into Terminal (using Utilities -> Terminal) and replace the mach_kernel with the patched version: # in Terminal from the OS X installer, assuming your HDD volume is called "Macintosh HD" cp /mach_kernel "/Volumes/Macintosh HD/mach_kernel" After that, you can exit the installer, and boot into the installed partition to finish installation and reach the desktop. MD5 sums for mach_kernel Check your md5 sums with: md5 mach_kernel 10.10 kernelvanilla: 9f1768fddec369e545d938f0f4f76350 xcpm patched: eb21ca4bd7aba97d5e7b080a481fc173 10.9.5 mach_kernel vanilla: 8f9adba4ca2f55907b8ec8d4bbf4c555 xpcm patched: 0563c5d1fd99db17198d53ad60c9d9ba 10.9.4 mach_kernel vanilla: 3d0ad5a7a8ef3b1d4e6ea33e92e4d3b5 xpcm patched: 921c850e3062e750730b0e99f5eaa381 10.9.3 mach_kernel vanilla: 5ba55b0d446094f82e48e8a413ddfaec xcpm patched: 6848b1904426d5e270a2db6fada67fb0 10.9.2 mach_kernel vanilla: 15ce54d9b6edc47e282fdf038f71738c xcpm patched: aeb9203dc754afac23bf9696833032fe 10.9 mach_kernel vanilla: 06b687fa00945c97e06ad1919625793c xcpm patched: 88bf62a7955b9e20cdb19906bdda6b43 10.8.5 mach_kernel vanilla: e835be83eb956af0b63d28f69bfb22b3 xcpm patched: 539c3a1e2fef063384b44543765b8a39 DSDT Patches: I have published my DSDT patch project on github. It relies heavily on my generic laptop DSDT patch repo. Read the README.md and setup carefully in order to use. https://github.com/RehabMan/HP-Envy-DSDT-Patch 10.9 kernel (xcpm free) built from Apple's sources is provided below. Note: DO NOT apply the patches to this attached kernel... they will have no effect. The patches are for vanilla mach_kernel. Update 2014-02-13 Attached mach_kernel built from Apple's sources removed. There is no reason to use it. Use the provided patches to create a mach_kernel that works with machines with locked MSR 0xE2.
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