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2016-07-08x86/RAS/AMD: Reduce the number of IPIs when prepping error injectionYazen Ghannam1-30/+28
We currently use wrmsr_on_cpu() 4 times when prepping for an error injection. This will generate 4 IPIs for each MSR write. We can reduce the number of IPIs to 1 by grouping the MSR writes and executing them serially on the appropriate CPU. Suggested-by: Borislav Petkov <bp@suse.de> Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/1467968983-4874-3-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-05-12x86/RAS: Add SMCA support to AMD Error InjectorYazen Ghannam1-6/+25
Use SMCA MSRs when writing to MCA_{STATUS,ADDR,MISC} and MCA_DE{STAT,ADDR} when injecting Deferred Errors on SMCA platforms. Signed-off-by: Yazen Ghannam <Yazen.Ghannam@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Aravind Gopalakrishnan <aravindksg.lkml@gmail.com> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Cc: linux-edac <linux-edac@vger.kernel.org> Link: http://lkml.kernel.org/r/1462971509-3856-8-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-04-13x86/RAS: Rename AMD MCE injector config itemBorislav Petkov2-2/+2
... to be the same like the file name of injection module itself to avoid confusion when grepping. No functionality change. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/1459929916-12852-2-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2016-03-29x86/topology: Fix AMD core countPeter Zijlstra1-1/+2
It turns out AMD gets x86_max_cores wrong when there are compute units. The issue is that Linux assumes: nr_logical_cpus = nr_cores * nr_siblings But AMD reports its CU unit as 2 cores, but then sets num_smp_siblings to 2 as well. Boris: fixup ras/mce_amd_inj.c too, to compute the Node Base Core properly, according to the new nomenclature. Fixes: 1f12e32f4cd5 ("x86/topology: Create logical package id") Reported-by: Xiong Zhou <jencce.kernel@gmail.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Andreas Herrmann <aherrmann@suse.com> Cc: Andy Lutomirski <luto@kernel.org> Link: http://lkml.kernel.org/r/20160317095220.GO6344@twins.programming.kicks-ass.net Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2015-10-12x86/ras/mce_amd_inj: Inject bank 4 errors on the NBCAravind Gopalakrishnan2-3/+53
Bank 4 MCEs are logged and reported only on the node base core (NBC) in a socket. Refer to the D18F3x44[NbMcaToMstCpuEn] field in Fam10h and later BKDGs. The node base core (NBC) is the lowest numbered core in the node. This patch ensures that we inject the error on the NBC for bank 4 errors. Otherwise, triggering #MC or APIC interrupts on a core which is not the NBC would not have any effect on the system, i.e. we would not see any relevant output on kernel logs for the error we just injected. Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com> [ Cleanup comments. ] [ Add a missing dependency on AMD_NB caught by Randy Dunlap. ] Signed-off-by: Borislav Petkov <bp@suse.de> Acked-by: Randy Dunlap <rdunlap@infradead.org> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/1443190851-2172-4-git-send-email-Aravind.Gopalakrishnan@amd.com Link: http://lkml.kernel.org/r/1444641762-9437-5-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-12x86/ras/mce_amd_inj: Trigger deferred and thresholding errors interruptsAravind Gopalakrishnan1-1/+41
Add the capability to trigger deferred error interrupts and threshold interrupts in order to test the APIC interrupt handler functionality for these type of errors. Update README section about the same too. Reported by: kbuild test robot <fengguang.wu@intel.com> Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com> [ Cleanup comments. ] [ Include asm/irq_vectors.h directly so that misc randbuilds don't fail. ] Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/1443190851-2172-3-git-send-email-Aravind.Gopalakrishnan@amd.com Link: http://lkml.kernel.org/r/1444641762-9437-4-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-10-12x86/ras/mce_amd_inj: Return early on invalid inputAravind Gopalakrishnan1-6/+3
Invalid inputs such as these are currently reported in dmesg as failing: $> echo sweet > flags [ 122.079139] flags_write: Invalid flags value: et even though the 'flags' attribute has been updated correctly: $> cat flags sw This is because userspace keeps writing the remaining buffer until it encounters an error. However, the input as a whole is wrong and we should not be writing anything to the file. Therefore, correct flags_write() to return -EINVAL immediately on bad input strings. Signed-off-by: Aravind Gopalakrishnan <Aravind.Gopalakrishnan@amd.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Borislav Petkov <bp@alien8.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/1443190851-2172-2-git-send-email-Aravind.Gopalakrishnan@amd.com Link: http://lkml.kernel.org/r/1444641762-9437-3-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-08-13x86/ras: Move AMD MCE injector to arch/x86/ras/Borislav Petkov3-0/+388
This is an x86-specific module and would benefit from being closer to the arch code. Move it there. Update copyright while at it. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Tony Luck <tony.luck@intel.com> Link: http://lkml.kernel.org/r/1439396985-12812-14-git-send-email-bp@alien8.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
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