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| author | Nicolai Stange <nstange@suse.de> | 2018-07-29 13:06:04 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-08-15 17:37:32 +0200 |
| commit | 3131918d536055f456bc453fa96a083080112bc5 (patch) | |
| tree | 40edff8ec0b9e7a6844210c49fea9357ff0ff3a8 | |
| parent | 5ab84cf0c2ba831d58566c783333661053c90ef1 (diff) | |
| download | linux-stable-3131918d536055f456bc453fa96a083080112bc5.tar.gz linux-stable-3131918d536055f456bc453fa96a083080112bc5.tar.bz2 linux-stable-3131918d536055f456bc453fa96a083080112bc5.zip | |
x86/irq: Let interrupt handlers set kvm_cpu_l1tf_flush_l1d
commit ffcba43ff66c7dab34ec700debd491d2a4d319b4 upstream.
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: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Nicolai Stange <nstange@suse.de>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | arch/x86/include/asm/apic.h | 3 | ||||
| -rw-r--r-- | arch/x86/kernel/smp.c | 1 | ||||
| -rw-r--r-- | arch/x86/platform/uv/tlb_uv.c | 1 |
3 files changed, 5 insertions, 0 deletions
diff --git a/arch/x86/include/asm/apic.h b/arch/x86/include/asm/apic.h index 9362a3aae927..130e81e10fc7 100644 --- a/arch/x86/include/asm/apic.h +++ b/arch/x86/include/asm/apic.h @@ -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) diff --git a/arch/x86/kernel/smp.c b/arch/x86/kernel/smp.c index 5c574dff4c1a..04adc8d60aed 100644 --- a/arch/x86/kernel/smp.c +++ b/arch/x86/kernel/smp.c @@ -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()) { /* diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c index ca446da48fd2..3866b96a7ee7 100644 --- a/arch/x86/platform/uv/tlb_uv.c +++ b/arch/x86/platform/uv/tlb_uv.c @@ -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()); |