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KVM: x86: Rework request for immediate exit

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The VMX implementation of enable_irq_window raised
KVM_REQ_IMMEDIATE_EXIT after we checked it in vcpu_enter_guest. This
caused infinite loops on vmentry. Fix it by letting enable_irq_window
signal the need for an immediate exit via its return value and drop
KVM_REQ_IMMEDIATE_EXIT.

This issue only affects nested VMX scenarios.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
This commit is contained in:
Jan Kiszka
2013-04-28 10:50:52 +02:00
committed by Gleb Natapov
parent 6614c7d042
commit 730dca42c1
5 changed files with 21 additions and 21 deletions
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15
include/linux/kvm_host.h
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@@ -119,14 +119,13 @@ static inline bool is_error_page(struct page *page)
#define KVM_REQ_APF_HALT 12
#define KVM_REQ_STEAL_UPDATE 13
#define KVM_REQ_NMI 14
#define KVM_REQ_IMMEDIATE_EXIT 15
#define KVM_REQ_PMU 16
#define KVM_REQ_PMI 17
#define KVM_REQ_WATCHDOG 18
#define KVM_REQ_MASTERCLOCK_UPDATE 19
#define KVM_REQ_MCLOCK_INPROGRESS 20
#define KVM_REQ_EPR_EXIT 21
#define KVM_REQ_SCAN_IOAPIC 22
#define KVM_REQ_PMU 15
#define KVM_REQ_PMI 16
#define KVM_REQ_WATCHDOG 17
#define KVM_REQ_MASTERCLOCK_UPDATE 18
#define KVM_REQ_MCLOCK_INPROGRESS 19
#define KVM_REQ_EPR_EXIT 20
#define KVM_REQ_SCAN_IOAPIC 21
#define KVM_USERSPACE_IRQ_SOURCE_ID 0
#define KVM_IRQFD_RESAMPLE_IRQ_SOURCE_ID 1