Commit 74899d92 authored Jun 21, 2018 by Juergen Gross Committed by Ingo Molnar Jun 21, 2018

x86/xen: Add call of speculative_store_bypass_ht_init() to PV paths



Commit:

  1f50ddb4 ("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.woods@amd.com>
Tested-by: Brian Woods <brian.woods@amd.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Cc: <stable@vger.kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: boris.ostrovsky@oracle.com
Cc: xen-devel@lists.xenproject.org
Fixes: 1f50ddb4 ("x86/speculation: Handle HT correctly on AMD")
Link: https://lore.kernel.org/lkml/20180621084331.21228-1-jgross@suse.com


Signed-off-by: Ingo Molnar <mingo@kernel.org>

parent 3ae6295c

arch/x86/xen/smp_pv.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -32,6 +32,7 @@
		#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>

		@@ -70,6 +71,8 @@ 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);
		@@ -250,6 +253,8 @@ static void __init xen_pv_smp_prepare_cpus(unsigned int max_cpus)
		}
		set_cpu_sibling_map(0);

		speculative_store_bypass_ht_init();

		xen_pmu_init(0);

		if (xen_smp_intr_init(0) \|\| xen_smp_intr_init_pv(0))

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