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xen.11304
5d67ceaf-x86-properly-gate-PKU-clearing.patch
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File 5d67ceaf-x86-properly-gate-PKU-clearing.patch of Package xen.11304
# Commit 41c7700a00011ad08be3c9d71126b67e08e58ac3 # Date 2019-08-29 15:10:07 +0200 # Author Jan Beulich <jbeulich@suse.com> # Committer Jan Beulich <jbeulich@suse.com> x86: properly gate clearing of PKU feature setup_clear_cpu_cap() is __init and hence may not be called post-boot. Note that opt_pku nevertheless is not getting __initdata added - see e.g. commit 43fa95ae6a ("mm: make opt_bootscrub non-init"). Signed-off-by: Jan Beulich <jbeulich@suse.com> Acked-by: Andrew Cooper <andrew.cooper3@citrix.com> --- a/xen/arch/x86/cpu/common.c +++ b/xen/arch/x86/cpu/common.c @@ -464,7 +464,7 @@ void identify_cpu(struct cpuinfo_x86 *c) this_cpu->c_init(c); - if ( !opt_pku ) + if (c == &boot_cpu_data && !opt_pku) setup_clear_cpu_cap(X86_FEATURE_PKU); /*
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