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Rdmsrl_safe_on_cpu

WebThis patch adds rdmsr_safe_on_cpu_resched() which does not spin. I use this function from msr_read() but future patches might convert other callers to use this variant as well. … Web"CPU Core May Machine Check When System Software Changes Page Tables Dynamically" - worked around by setting bit 47. 15h Errata 674 "Processor May Cache Prefetched Data from Remapped Memory Region" - worked around by setting bit 13. C001_1023: K8 Errata 69 "Multiprocessor Coherency Problem with Hardware Prefetch Mechanism" - worked around …

Why are the results of rdmsr not consistency - Intel Communities

WebThis may happen when Linux is running under KVM and we are passing-through host F/M/S data, for example. Use rdmsrl_safe to first access the RAPL_POWER_UNIT MSR; if this fails, do not attempt to use this PMU. WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH] perf/x86/intel: Use rdmsrl_safe when initializing RAPL PMU. @ 2014-03-13 19:36 Venkatesh Srinivas … small mens batman costume https://bowden-hill.com

msr.h source code [linux/arch/x86/include/asm/msr.h]

WebOn Fri, Jun 01, 2012 at 04:52:36PM +0200, Borislav Petkov wrote: > From: Borislav Petkov > There's no real reason why, when showing the MSRs on a CPU at boottime, > we should be using the AMD-specific variant. Simply use the generic safe > one which handles #GPs just fine. Acked-by: Konrad Rzeszutek Wilk … WebAug 4, 2015 · perf/x86: Add an MSR PMU driver. This patch adds an MSR PMU to support free running MSR counters. Such. as time and freq related counters includes TSC, IA32_APERF, IA32_MPERF. and IA32_PPERF, but also SMI_COUNT. The events are exposed in sysfs for use by perf stat and other tools. WebHere is a simple scenario to reproduce the issue: 1. Boot up the system 2. Get MSR 0x19a, it should be 0 3. Put the system into sleep, then wake it up 4. Get MSR 0x19a, it shows 0x10, while it should be 0 Although some BIOSen want to change the CPU Duty Cycle during S3, in our case we don't want the BIOS to do any modification. highley kitchens normanton

[PATCH v2 1/2] x86, msr: add rdmsr_safe_on_cpu_resched() and …

Category:rdmsr: tool for reading CPU machine specific registers (MSR)

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Rdmsrl_safe_on_cpu

Linux kernel module for Zen workaround for rr · GitHub - Gist

Web> The rdmsrl_safe() function returns 0 on success. > The current code was failing to detect the RAPL PMU > on real hardware (missing /sys/devices/power) because > the return value of rdmsrl_safe() was misinterpreted. > > Signed-off-by: Stephane Eranian Acked-by: Borislav Petkov -- Regards/Gruss, Boris. … WebIt is to replace the legacy ACPI P-States control, * allows a flexible, low-latency interface for the Linux kernel to directly. * communicate the performance hints to hardware. *. * AMD P-State is supported on recent AMD Zen base CPU series include some of. * Zen2 and Zen3 processors. _CPC needs to be present in the ACPI tables of AMD.

Rdmsrl_safe_on_cpu

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WebJan 31, 2024 · Securing RDP. Take immediate steps to lock down your systems. First, always keep your RDP servers and clients up to date; never connect to an RDP server that … WebMay 10, 2024 · Split lock is a memory bus lock supported by the CPU to support atomic memory accesses across a cache line. Some processors like ARM and RISC-V do not allow unaligned memory accesses and do not generate atomic accesses across cache lines, so split lock is not generated, while X86 supports it.

WebOn Tue, Mar 27, 2024 at 08:22:33PM -0700, Eric Dumazet wrote: > When changing rdmsr_safe_on_cpu() to schedule, I missed that > __rdmsr_safe_on_cpu() was also used … Webnative_ {rdmsr,wrmsr}_safe_regs are two new interfaces which allow presetting of a subset of eight x86 GPRs before executing the rd/wrmsr instructions. This is needed at least on AMD K8 for accessing an erratum workaround MSR. Originally based on an idea by H. Peter Anvin. Signed-off-by: Borislav Petkov ---

WebA tag already exists with the provided branch name. Many Git commands accept both tag and branch names, so creating this branch may cause unexpected behavior. WebDec 14, 2024 · The rdmsr command reads a Model-Specific Register (MSR) value from the specified address. dbgcmd rdmsr Address Parameters Address Specifies the address of …

WebLKML Archive on lore.kernel.org help / color / mirror / Atom feed * [PATCH] perf/x86/intel: Use rdmsrl_safe when initializing RAPL PMU. @ 2014-03-13 19:36 Venkatesh Srinivas 2014-03-14 8:44 ` Peter Zijlstra ` (2 more replies) 0 siblings, 3 replies; 18+ messages in thread From: Venkatesh Srinivas @ 2014-03-13 19:36 UTC (permalink / raw) To: linux-kernel, …

WebMar 14, 2024 · Subsystem: Regression: No. Attachments. Add an attachment (proposed patch, testcase, etc.) Description sander44 2024-03-14 14:35:42 UTC. [ 8.581625] calling intel_uncore_init+0x0/0x10c @ 1 [ 8.582371] unchecked MSR access error: RDMSR from 0x620 at rIP: 0xffffffff8d7abe2b (__rdmsr_on_cpu+0x2b/0x60) [ 8.584572] Call Trace: [ … highley manorWebJul 4, 2024 · From: Josh Poimboeuf <> Subject [RFC PATCH] x86: Remove X86_FEATURE_MFENCE_RDTSC: Date: Thu, 4 Jul 2024 10:46:37 -0500 highley manor crawleyWebApr 23, 2012 · int rdmsr_safe_regs_on_cpu (unsigned int cpu, u32 regs [8]) Have a look at /lib/modules//build/arch/x86/include/asm/msr.h Share Follow answered Nov 6, … highley manor hotel balcombeWebrdmsr is a tool used for reading a CPU's machine specific registers (MSR). Note: if you're running a Debian kernel, be sure that the msr.ko kernel module is loaded. 'modprobe msr' … small men\u0027s wrist watchesWebApr 21, 2024 · Srinivas, should that uncore frequency thing even be exposed to guests? Does it make sense there? highley manor haywards heathWebApr 22, 2024 · To save Remote Desktop Connection Settings to RDP File in Windows 11/10, do the following: Press Windows key + Rto invoke the Run dialog. In the Run dialog box … small mens carhartt hoodieWebLinux debugging, tracing, profiling & perf. analysis. Check our new training course. with Creative Commons CC-BY-SA small mens chest bag