This is a note to let you know that I've just added the patch titled x86/xen: Add call of speculative_store_bypass_ht_init() to PV paths
to the 4.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: x86-xen-add-call-of-speculative_store_bypass_ht_init-to-pv-paths.patch and it can be found in the queue-4.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <sta...@vger.kernel.org> know about it. From 9dee2b7c4d4868423d9812c969b0b724fdf780c6 Mon Sep 17 00:00:00 2001 From: Juergen Gross <jgr...@suse.com> Date: Thu, 21 Jun 2018 10:43:31 +0200 Subject: x86/xen: Add call of speculative_store_bypass_ht_init() to PV paths From: Juergen Gross <jgr...@suse.com> commit 74899d92e66663dc7671a8017b3146dcd4735f3b upstream. Commit: 1f50ddb4f418 ("x86/speculation: Handle HT correctly on AMD") ... added speculative_store_bypass_ht_init() to the per-CPU initialization sequence. speculative_store_bypass_ht_init() needs to be called on each CPU for PV guests, too. Reported-by: Brian Woods <brian.wo...@amd.com> Tested-by: Brian Woods <brian.wo...@amd.com> Signed-off-by: Juergen Gross <jgr...@suse.com> Cc: <sta...@vger.kernel.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: boris.ostrov...@oracle.com Cc: xen-devel@lists.xenproject.org Fixes: 1f50ddb4f4189243c05926b842dc1a0332195f31 ("x86/speculation: Handle HT correctly on AMD") Link: https://lore.kernel.org/lkml/20180621084331.21228-1-jgr...@suse.com Signed-off-by: Ingo Molnar <mi...@kernel.org> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> Signed-off-by: Srivatsa S. Bhat <sriva...@csail.mit.edu> Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org> --- arch/x86/xen/smp.c | 5 +++++ 1 file changed, 5 insertions(+) --- a/arch/x86/xen/smp.c +++ b/arch/x86/xen/smp.c @@ -28,6 +28,7 @@ #include <xen/interface/vcpu.h> #include <xen/interface/xenpmu.h> +#include <asm/spec-ctrl.h> #include <asm/xen/interface.h> #include <asm/xen/hypercall.h> @@ -87,6 +88,8 @@ static void cpu_bringup(void) cpu_data(cpu).x86_max_cores = 1; set_cpu_sibling_map(cpu); + speculative_store_bypass_ht_init(); + xen_setup_cpu_clockevents(); notify_cpu_starting(cpu); @@ -357,6 +360,8 @@ static void __init xen_smp_prepare_cpus( } set_cpu_sibling_map(0); + speculative_store_bypass_ht_init(); + xen_pmu_init(0); if (xen_smp_intr_init(0)) Patches currently in stable-queue which might be from jgr...@suse.com are queue-4.4/x86-xen-add-call-of-speculative_store_bypass_ht_init-to-pv-paths.patch queue-4.4/xen-set-cpu-capabilities-from-xen_start_kernel.patch queue-4.4/x86-xen-zero-msr_ia32_spec_ctrl-before-suspend.patch queue-4.4/x86-paravirt-make-native_save_fl-extern-inline.patch queue-4.4/x86-amd-don-t-set-x86_bug_sysret_ss_attrs-when-running-under-xen.patch _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel