Commit ffcba43f authored by Nicolai Stange's avatar Nicolai Stange Committed by Thomas Gleixner
Browse files

x86/irq: Let interrupt handlers set kvm_cpu_l1tf_flush_l1d 



The last missing piece to having vmx_l1d_flush() take interrupts after
VMEXIT into account is to set the kvm_cpu_l1tf_flush_l1d per-cpu flag on
irq entry.

Issue calls to kvm_set_cpu_l1tf_flush_l1d() from entering_irq(),
ipi_entering_ack_irq(), smp_reschedule_interrupt() and
uv_bau_message_interrupt().

Suggested-by: default avatarPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarNicolai Stange <nstange@suse.de>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent 447ae316

arch/x86/include/asm/apic.h

+3 −0
Original line number Diff line number Diff line
@@ -10,6 +10,7 @@ 
#include <asm/fixmap.h>

#include <asm/mpspec.h>

#include <asm/msr.h>

#include <asm/hardirq.h>



#define ARCH_APICTIMER_STOPS_ON_C3	1
@@ -514,6 +515,7 @@ extern void irq_exit(void); 
static inline void entering_irq(void)

{

	irq_enter();

	kvm_set_cpu_l1tf_flush_l1d();

}



static inline void entering_ack_irq(void)
@@ -526,6 +528,7 @@ static inline void ipi_entering_ack_irq(void) 
{

	irq_enter();

	ack_APIC_irq();

	kvm_set_cpu_l1tf_flush_l1d();

}



static inline void exiting_irq(void)

arch/x86/kernel/smp.c

+1 −0
Original line number Diff line number Diff line
@@ -261,6 +261,7 @@ __visible void __irq_entry smp_reschedule_interrupt(struct pt_regs *regs) 
{

	ack_APIC_irq();

	inc_irq_stat(irq_resched_count);

	kvm_set_cpu_l1tf_flush_l1d();



	if (trace_resched_ipi_enabled()) {

		/*

arch/x86/platform/uv/tlb_uv.c

+1 −0
Original line number Diff line number Diff line
@@ -1285,6 +1285,7 @@ void uv_bau_message_interrupt(struct pt_regs *regs) 
	struct msg_desc msgdesc;



	ack_APIC_irq();

	kvm_set_cpu_l1tf_flush_l1d();

	time_start = get_cycles();



	bcp = &per_cpu(bau_control, smp_processor_id());

CRA Git | Maintained and supported by SUSTech CRA and CCSE