Messages in this thread Patch in this message | | | From | Juergen Gross <> | Subject | [PATCH] x86/xen: add call of speculative_store_bypass_ht_init() to pv paths | Date | Thu, 21 Jun 2018 10:43:31 +0200 |
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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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