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Subject[PATCH] x86/xen: add call of speculative_store_bypass_ht_init() to pv paths
Date
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))
--
2.13.7
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