[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index] [xen staging-4.18] x86/ucode: Fix stability of the raw CPU Policy rescan
*** New tip has no discernable common ancestor with previous history *** Previously reported histories end at: 0751a75e3996cf6efd3925a90b4776660d8df2bc commit b1fdd7d0e47e0831ac7a99d0417385fc10d3068c Author: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> AuthorDate: Thu Feb 1 18:02:24 2024 +0100 Commit: Jan Beulich <jbeulich@xxxxxxxx> CommitDate: Thu Feb 1 18:02:24 2024 +0100 x86/ucode: Fix stability of the raw CPU Policy rescan Always run microcode_update_helper() on the BSP, so the the updated Raw CPU policy doesn't get non-BSP topology details included. Have calculate_raw_cpu_policy() clear the instantanious XSTATE sizes. The value XCR0 | MSR_XSS had when we scanned the policy isn't terribly interesting to report. When CPUID Masking is active, it affects CPUID instructions issued by Xen too. Transiently disable masking to get a clean scan. Fixes: 694d79ed5aac ("x86/ucode: Refresh raw CPU policy after microcode load") Signed-off-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx> Reviewed-by: Jan Beulich <jbeulich@xxxxxxxx> master commit: cf7fe8b72deaa94157ddf97d4bb391480205e9c2 master date: 2024-01-25 17:46:57 +0000 -- generated by git-patchbot for /home/xen/git/xen.git#staging-4.18
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