Commit 1f50ddb4f4189243c05926b842dc1a0332195f31 ("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 Fixes: 1f50ddb4f4189243c05926b842dc1a0332195f31 ("x86/speculation: Handle HT correctly on AMD") Cc: stable@vger.kernel.org Signed-off-by: Juergen Gross jgross@suse.com Tested-by: Brian Woods brian.woods@amd.com --- arch/x86/xen/smp_pv.c | 5 +++++ 1 file changed, 5 insertions(+)

diff --git a/arch/x86/xen/smp_pv.c b/arch/x86/xen/smp_pv.c index 2e20ae2fa2d6..e3b18ad49889 100644 --- a/arch/x86/xen/smp_pv.c +++ b/arch/x86/xen/smp_pv.c @@ -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))