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target/i386: Added VGIF feature

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VGIF allows STGI and CLGI to execute in guest mode and control virtual
interrupts in guest mode.
When the VGIF feature is enabled then:
 * executing STGI in the guest sets bit 9 of the VMCB offset 60h.
 * executing CLGI in the guest clears bit 9 of the VMCB offset 60h.

Signed-off-by: Lara Lazier <laramglazier@gmail.com>
Message-Id: <20210730070742.9674-1-laramglazier@gmail.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Lara Lazier 2021-07-30 09:07:42 +02:00 • committed by Paolo Bonzini
parent 97afb47e15
commit 900eeca579
3 changed files with 37 additions and 3 deletions
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6
target/i386/svm.h
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@ -9,6 +9,12 @@
#define V_IRQ_SHIFT 8
#define V_IRQ_MASK (1 << V_IRQ_SHIFT)
#define V_GIF_ENABLED_SHIFT 25
#define V_GIF_ENABLED_MASK (1 << V_GIF_ENABLED_SHIFT)
#define V_GIF_SHIFT 9
#define V_GIF_MASK (1 << V_GIF_SHIFT)
#define V_INTR_PRIO_SHIFT 16
#define V_INTR_PRIO_MASK (0x0f << V_INTR_PRIO_SHIFT)