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
...@@ -10,6 +10,7 @@ ...@@ -10,6 +10,7 @@
#include <asm/fixmap.h> #include <asm/fixmap.h>
#include <asm/mpspec.h> #include <asm/mpspec.h>
#include <asm/msr.h> #include <asm/msr.h>
#include <asm/hardirq.h>
#define ARCH_APICTIMER_STOPS_ON_C3 1 #define ARCH_APICTIMER_STOPS_ON_C3 1
...@@ -514,6 +515,7 @@ extern void irq_exit(void); ...@@ -514,6 +515,7 @@ extern void irq_exit(void);
static inline void entering_irq(void) static inline void entering_irq(void)
{ {
irq_enter(); irq_enter();
kvm_set_cpu_l1tf_flush_l1d();
} }
static inline void entering_ack_irq(void) static inline void entering_ack_irq(void)
...@@ -526,6 +528,7 @@ static inline void ipi_entering_ack_irq(void) ...@@ -526,6 +528,7 @@ static inline void ipi_entering_ack_irq(void)
{ {
irq_enter(); irq_enter();
ack_APIC_irq(); ack_APIC_irq();
kvm_set_cpu_l1tf_flush_l1d();
} }
static inline void exiting_irq(void) static inline void exiting_irq(void)
......
...@@ -261,6 +261,7 @@ __visible void __irq_entry smp_reschedule_interrupt(struct pt_regs *regs) ...@@ -261,6 +261,7 @@ __visible void __irq_entry smp_reschedule_interrupt(struct pt_regs *regs)
{ {
ack_APIC_irq(); ack_APIC_irq();
inc_irq_stat(irq_resched_count); inc_irq_stat(irq_resched_count);
kvm_set_cpu_l1tf_flush_l1d();
if (trace_resched_ipi_enabled()) { if (trace_resched_ipi_enabled()) {
/* /*
......
...@@ -1285,6 +1285,7 @@ void uv_bau_message_interrupt(struct pt_regs *regs) ...@@ -1285,6 +1285,7 @@ void uv_bau_message_interrupt(struct pt_regs *regs)
struct msg_desc msgdesc; struct msg_desc msgdesc;
ack_APIC_irq(); ack_APIC_irq();
kvm_set_cpu_l1tf_flush_l1d();
time_start = get_cycles(); time_start = get_cycles();
bcp = &per_cpu(bau_control, smp_processor_id()); bcp = &per_cpu(bau_control, smp_processor_id());
......
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