* [PATCH v2] target/i386: Added V_INTR_PRIO check to virtual interrupts
@ 2021-07-28 10:17 Lara Lazier
2021-07-29 7:57 ` Paolo Bonzini
0 siblings, 1 reply; 2+ messages in thread
From: Lara Lazier @ 2021-07-28 10:17 UTC (permalink / raw)
To: qemu-devel; +Cc: pbonzini, Lara Lazier
v1->v2: Fixed Mask
The APM2 states that The processor takes a virtual INTR interrupt
if V_IRQ and V_INTR_PRIO indicate that there is a virtual interrupt pending
whose priority is greater than the value in V_TPR.
Signed-off-by: Lara Lazier <laramglazier@gmail.com>
---
target/i386/tcg/sysemu/svm_helper.c | 11 ++++++++++-
1 file changed, 10 insertions(+), 1 deletion(-)
diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/svm_helper.c
index 72ea7c9a08..a3138e9f86 100644
--- a/target/i386/tcg/sysemu/svm_helper.c
+++ b/target/i386/tcg/sysemu/svm_helper.c
@@ -65,6 +65,16 @@ static inline void svm_load_seg_cache(CPUX86State *env, hwaddr addr,
sc->base, sc->limit, sc->flags);
}
+static inline bool ctl_has_irq(uint32_t int_ctl)
+{
+ uint32_t int_prio;
+ uint32_t tpr;
+
+ int_prio = (int_ctl & V_INTR_PRIO_MASK) >> V_INTR_PRIO_SHIFT;
+ tpr = int_ctl & V_TPR_MASK;
+ return (int_ctl & V_IRQ_MASK) && (int_prio >= tpr);
+}
+
static inline bool is_efer_invalid_state (CPUX86State *env)
{
if (!(env->efer & MSR_EFER_SVME)) {
@@ -365,7 +375,6 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend)
if (ctl_has_irq(int_ctl)) {
CPUState *cs = env_cpu(env);
-
cs->interrupt_request |= CPU_INTERRUPT_VIRQ;
}
--
2.25.1
^ permalink raw reply related [flat|nested] 2+ messages in thread
* Re: [PATCH v2] target/i386: Added V_INTR_PRIO check to virtual interrupts
2021-07-28 10:17 [PATCH v2] target/i386: Added V_INTR_PRIO check to virtual interrupts Lara Lazier
@ 2021-07-29 7:57 ` Paolo Bonzini
0 siblings, 0 replies; 2+ messages in thread
From: Paolo Bonzini @ 2021-07-29 7:57 UTC (permalink / raw)
To: Lara Lazier, qemu-devel
On 28/07/21 12:17, Lara Lazier wrote:
> v1->v2: Fixed Mask
>
> The APM2 states that The processor takes a virtual INTR interrupt
> if V_IRQ and V_INTR_PRIO indicate that there is a virtual interrupt pending
> whose priority is greater than the value in V_TPR.
>
> Signed-off-by: Lara Lazier <laramglazier@gmail.com>
> ---
> target/i386/tcg/sysemu/svm_helper.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/target/i386/tcg/sysemu/svm_helper.c b/target/i386/tcg/sysemu/svm_helper.c
> index 72ea7c9a08..a3138e9f86 100644
> --- a/target/i386/tcg/sysemu/svm_helper.c
> +++ b/target/i386/tcg/sysemu/svm_helper.c
> @@ -65,6 +65,16 @@ static inline void svm_load_seg_cache(CPUX86State *env, hwaddr addr,
> sc->base, sc->limit, sc->flags);
> }
>
> +static inline bool ctl_has_irq(uint32_t int_ctl)
> +{
> + uint32_t int_prio;
> + uint32_t tpr;
> +
> + int_prio = (int_ctl & V_INTR_PRIO_MASK) >> V_INTR_PRIO_SHIFT;
> + tpr = int_ctl & V_TPR_MASK;
> + return (int_ctl & V_IRQ_MASK) && (int_prio >= tpr);
> +}
> +
> static inline bool is_efer_invalid_state (CPUX86State *env)
> {
> if (!(env->efer & MSR_EFER_SVME)) {
> @@ -365,7 +375,6 @@ void helper_vmrun(CPUX86State *env, int aflag, int next_eip_addend)
>
> if (ctl_has_irq(int_ctl)) {
> CPUState *cs = env_cpu(env);
> -
> cs->interrupt_request |= CPU_INTERRUPT_VIRQ;
> }
>
>
Merged, thanks.
Paolo
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