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Kernel – GCC and ‘Retpoline’..

Adventures With Linux ™ Posted on February 1, 2018 by RGFebruary 1, 2018

The recent summary of Kernel 4.15 mentioned the test for ‘compliant’ versions of GCC which fully support the retpoline mitigation, but only gave an example of non-compliance: With GCC 7.2: ~]$ cat /sys/devices/system/cpu/vulnerabilities/spectre_v2  Vulnerable: Minimal generic ASM retpoline I re-created Fedora (Rawhide) GCC 7.3.1 for Fedora 27, and it gives the following, after Kernel 4.15 compilation/boot: ~]$ … Continue reading →

Posted in compilation, gcc, Intel, kernel, Linux, Performance, retpoline | Tagged 7.3.1, backport, gcc, kernel, linux, mitigation, retpoline, spectre2 | Leave a reply

IA64 – The Gentoo saga.. Kernel 4.15-rc9

Adventures With Linux ™ Posted on January 22, 2018 by RGJanuary 22, 2018

After a lot of patience(!) I now have a much-hacked version of Gentoo running on the HP RX2600, and have just updated the kernel to 4.15-rc9: ……………… [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. This is rgia64.unknown_domain (Linux ia64 4.15.0-rc9) 19:42:44 root@rgia64 ~ # uname -a Linux rgia64 4.15.0-rc9 #1 … Continue reading →

Posted in Gentoo, Hacks, IA64, Intel, Itanium, kernel, Linux, Opinion | Tagged efi workaround, gentoo, hp, ia64, itanium, java, kernel, linux, rx2600 | Leave a reply

Kernel – 4.15-rc7 Released – And there will be an -rc8..

Adventures With Linux ™ Posted on January 7, 2018 by RGJanuary 7, 2018

Kernel 4.15-rc7 is out, and (brief) details of changes since -rc6 are here:  http://lkml.iu.edu/hypermail/linux/kernel/1801.0/04858.html.    The preamble is worth a read, as it pays tribute to the work done on the x86 PTI fixes.. Vmmon-patched VMware 14.1.0 is OK (see: https://github.com/mkubecek/vmware-host-modules/tree/workstation-14.1.0 ) and the latest NVIDIA drivers – 384.111 and 390.12 are both still OK. As mentioned, in … Continue reading →

Posted in Intel, kernel, Linux, NVIDIA, VMware | Tagged 384.111, 390.12, kernel 4.15-rc7, latest nvidia ok, vmmon-patched vmware 14.1.0 ok | Leave a reply

Kernel – Urgent Changes in Latest Versions, to Fix Intel CPU Security..

Adventures With Linux ™ Posted on January 2, 2018 by RGJanuary 3, 2018

Apparently, there has been a major security defect discovered in Intel CPUs, and full details have been embargoed until early-January, but there is a comprehensive article in The Register, here:  https://www.theregister.co.uk/2018/01/02/intel_cpu_design_flaw/ The Linux Kernel devs have been working to provide a workaround, as – apparently – there is no other practical solution: https://lkml.org/lkml/2017/12/4/709 The article does hint … Continue reading →

Posted in hardware, Intel, kernel, Linux, Opinion, Performance, VMware, X86_64 | Tagged fix with kernel mods, intel cpus, kernel, linux, security flaw | Leave a reply

IA64 – An Exercise in Nostalgia..

Adventures With Linux ™ Posted on November 21, 2017 by RGNovember 21, 2017

Ever since I spent some considerable time promoting HP’s IA64 Linux systems, way back in the early-2000’s, I have always wanted one for myself, and I recently managed to acquire an RX2600 1U server for a very reasonable price, and beef it up with some inexpensive parts from eBay.. The spec – at the moment – is … Continue reading →

Posted in Fedora, Hacks, hardware, IA64, Intel, Itanium, kernel, Linux, Opinion, quirks, RX2600 | Tagged boot, fedora, hp, ia64, itanium, kernel 4.14.1, rx2600, success, webmin | 4 Replies

NVIDIA – 387.12 released – OK with Kernel 4.14/Intel, and AMD with SME Disabled..

Adventures With Linux ™ Posted on October 3, 2017 by RGOctober 3, 2017

NVIDIA driver 387.12 is out, and details are here:  http://www.nvidia.com/Download/driverResults.aspx/125399/en-us The driver compiles/loads OK with Kernel 4.14-rc3 on Intel, without any patches, and is OK with AMD as long as its Secure Memory Encryption feature is de-selected ( see http://rglinuxtech.com/?p=2070 ). ………………… ld -r -o /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-387.12/kernel/nvidia-modeset/nv-modeset-interface.o /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-387.12/kernel/nvidia-modeset/nvidia-modeset-linux.o Building modules, stage 2. MODPOST 4 modules CC /home/rgadsdon/kernel/NVIDIA-Linux-x86_64-387.12/kernel/nvidia-drm.mod.o LD … Continue reading →

Posted in AMD, Hacks, Intel, kernel, Linux, NVIDIA | Tagged 387.12, amd ok with sme disabled, new driver, no patch with intel, nvidia, ok with kernel 4.14-rc3 | 1 Reply

Kernel – 4.14-rc3 Released – OK with Patched VMware, Still has NVIDIA/AMD/GPL Problem..

Adventures With Linux ™ Posted on October 1, 2017 by RGOctober 1, 2017

Kernel 4.13-rc3 is out, and brief details of changes from -rc2 are here:  http://lkml.iu.edu/hypermail/linux/kernel/1710.0/00180.html VMware 14.0.0 – with the vmmon patch – still loads/runs OK(*), and NVIDIA is OK on Intel systems, but if the new AMD ‘Secure Memory Encryption‘ feature is enabled in the kernel config, then NVIDIA (384.90) will still fail with a GPL error: … Continue reading →

Posted in AMD, Intel, kernel, Linux, NVIDIA, Opinion, VMware | Tagged kernel 4.13-rc3, nvidia intel ok, nvidia/amd/gpl issue not fixed, vmware 14 patched is ok | 2 Replies

VMware – Workstation 14 released – with a Gotcha..

Adventures With Linux ™ Posted on September 27, 2017 by RGSeptember 27, 2017

VMware Workstation Pro 14.0.0 has been released – a bit earlier than expected – and it has a (potentially) nasty surprise for those with ‘older’ CPUs..   Release notes are here:  https://docs.vmware.com/en/VMware-Workstation-Pro/14.0.0/rn/workstation-14-release-notes.html I installed this on my test system without any problems, and was able to confirm that it compiles and loads/runs OK with Kernels 4.13.x, and that … Continue reading →

Posted in Fedora, hardware, Intel, kernel, Linux, Opinion, Performance, VMware | Tagged cpuid early, error with older cpus, failed to start the virtual machine, kernel, linux, ok with fedora 26, ok with kernel 4.13, vmmon 4.14 patch still works, vmware 14 released, vt-x | 18 Replies

Hardware – UEFI Bios for Linux ‘Chromebook’

Adventures With Linux ™ Posted on August 11, 2017 by RGAugust 11, 2017

The original ‘SeaBios’ BIOS on my Acer c720p was a little clunky, so I decided to make the plunge and update it to a ‘proper’ Linux-friendly BIOS..    There is a known/good one available, but it is UEFI-only, so will involve changing the filesystem/partition layout on an existing system.. Disk /dev/sda: 119.2 GiB, 128035676160 bytes, 250069680 sectors … Continue reading →

Posted in boot, Chromebook, hardware, Intel, Linux, UEFI, X86_64 | Tagged c720p, chromebook, fedora, install, linux, new bios, reformat, success, uefi | Leave a reply

X86_64 – ‘Apollo Lake’ SOC System, with a Gotcha..

Adventures With Linux ™ Posted on July 30, 2017 by RGJuly 30, 2017

After more research, I decided to get one of the Intel ‘Apollo Lake’-based SOC systems, and the one I chose was from Kodlix..     It is functionally identical with another from Beelink, and in fact the Kodlix website shows images of the Beelink version of the device..    I just preferred the Kodlix version, as the case was a … Continue reading →

Posted in Apollo Lake, Fedora, Hacks, hardware, Intel, Linux, UEFI, X86_64 | Tagged ap42, apollo lake, beelink, fedora 26 installed, grub fails, intel soc, kodlix, linux, uefi, use refind, x86_64 | Leave a reply

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