This only implements the external delivery method via the GICv3.
Signed-off-by: Jinjie Ruan <ruanjin...@huawei.com>
---
v4:
- Accept NMI unconditionally for arm_cpu_has_work() but add comment.
- Change from & to && for EXCP_IRQ or EXCP_FIQ.
- Refator nmi mask in arm_excp_unmasked().
- Also handle VNMI in arm_cpu_exec_interrupt() and arm_cpu_set_irq().
- Rename virtual to Virtual.
v3:
- Not include CPU_INTERRUPT_NMI when FEAT_NMI not enabled
- Add ARM_CPU_VNMI.
- Refator nmi mask in arm_excp_unmasked().
- Test SCTLR_ELx.NMI for ALLINT mask for NMI.
---
target/arm/cpu-qom.h | 4 +-
target/arm/cpu.c | 88 +++++++++++++++++++++++++++++++++++++++---
target/arm/cpu.h | 4 ++
target/arm/helper.c | 2 +
target/arm/internals.h | 10 +++++
5 files changed, 101 insertions(+), 7 deletions(-)
diff --git a/target/arm/cpu-qom.h b/target/arm/cpu-qom.h
index 8e032691db..e0c9e18036 100644
--- a/target/arm/cpu-qom.h
+++ b/target/arm/cpu-qom.h
@@ -36,11 +36,13 @@ DECLARE_CLASS_CHECKERS(AArch64CPUClass, AARCH64_CPU,
#define ARM_CPU_TYPE_SUFFIX "-" TYPE_ARM_CPU
#define ARM_CPU_TYPE_NAME(name) (name ARM_CPU_TYPE_SUFFIX)
-/* Meanings of the ARMCPU object's four inbound GPIO lines */
+/* Meanings of the ARMCPU object's six inbound GPIO lines */
#define ARM_CPU_IRQ 0
#define ARM_CPU_FIQ 1
#define ARM_CPU_VIRQ 2
#define ARM_CPU_VFIQ 3
+#define ARM_CPU_NMI 4
+#define ARM_CPU_VNMI 5
/* For M profile, some registers are banked secure vs non-secure;
* these are represented as a 2-element array where the first element
diff --git a/target/arm/cpu.c b/target/arm/cpu.c
index 5fa86bc8d5..ad6e6200f6 100644
--- a/target/arm/cpu.c
+++ b/target/arm/cpu.c
@@ -122,6 +122,13 @@ void arm_restore_state_to_opc(CPUState *cs,
}
#endif /* CONFIG_TCG */
+/*
+ * With SCTLR_ELx.NMI == 0, IRQ with Superpriority is masked identically with
+ * IRQ without Superpriority. Moreover, if the GIC is configured so that
+ * FEAT_GICv3_NMI is only set if FEAT_NMI is set, then we won't ever see
+ * CPU_INTERRUPT_*NMI anyway. So we might as well accept NMI here
+ * unconditionally.
+ */
static bool arm_cpu_has_work(CPUState *cs)
{
ARMCPU *cpu = ARM_CPU(cs);
@@ -129,6 +136,7 @@ static bool arm_cpu_has_work(CPUState *cs)
return (cpu->power_state != PSCI_OFF)
&& cs->interrupt_request &
(CPU_INTERRUPT_FIQ | CPU_INTERRUPT_HARD
+ | CPU_INTERRUPT_NMI | CPU_INTERRUPT_VNMI
| CPU_INTERRUPT_VFIQ | CPU_INTERRUPT_VIRQ | CPU_INTERRUPT_VSERR
| CPU_INTERRUPT_EXITTB);
}
@@ -668,6 +676,7 @@ static inline bool arm_excp_unmasked(CPUState *cs, unsigned
int excp_idx,
CPUARMState *env = cpu_env(cs);
bool pstate_unmasked;
bool unmasked = false;
+ bool allIntMask = false;
/*
* Don't take exceptions if they target a lower EL.
@@ -678,13 +687,31 @@ static inline bool arm_excp_unmasked(CPUState *cs,
unsigned int excp_idx,
return false;
}
+ if (cpu_isar_feature(aa64_nmi, env_archcpu(env)) &&
+ env->cp15.sctlr_el[target_el] & SCTLR_NMI && cur_el == target_el) {
+ allIntMask = env->pstate & PSTATE_ALLINT ||
+ ((env->cp15.sctlr_el[target_el] & SCTLR_SPINTMASK) &&
+ (env->pstate & PSTATE_SP));
+ }
+
switch (excp_idx) {
+ case EXCP_NMI:
+ pstate_unmasked = !allIntMask;
+ break;
+
+ case EXCP_VNMI:
+ if ((!(hcr_el2 & HCR_IMO) && !(hcr_el2 & HCR_FMO)) ||
+ (hcr_el2 & HCR_TGE)) {
+ /* VNMIs(VIRQs or VFIQs) are only taken when hypervized. */
+ return false;
+ }
+ return !allIntMask;
case EXCP_FIQ:
- pstate_unmasked = !(env->daif & PSTATE_F);
+ pstate_unmasked = (!(env->daif & PSTATE_F)) && (!allIntMask);
break;
case EXCP_IRQ:
- pstate_unmasked = !(env->daif & PSTATE_I);
+ pstate_unmasked = (!(env->daif & PSTATE_I)) && (!allIntMask);
break;
case EXCP_VFIQ:
@@ -692,13 +719,13 @@ static inline bool arm_excp_unmasked(CPUState *cs,
unsigned int excp_idx,
/* VFIQs are only taken when hypervized. */
return false;
}
- return !(env->daif & PSTATE_F);
+ return !(env->daif & PSTATE_F) && (!allIntMask);
case EXCP_VIRQ:
if (!(hcr_el2 & HCR_IMO) || (hcr_el2 & HCR_TGE)) {
/* VIRQs are only taken when hypervized. */
return false;
}
- return !(env->daif & PSTATE_I);
+ return !(env->daif & PSTATE_I) && (!allIntMask);
case EXCP_VSERR:
if (!(hcr_el2 & HCR_AMO) || (hcr_el2 & HCR_TGE)) {
/* VIRQs are only taken when hypervized. */
@@ -804,6 +831,24 @@ static bool arm_cpu_exec_interrupt(CPUState *cs, int
interrupt_request)
/* The prioritization of interrupts is IMPLEMENTATION DEFINED. */
+ if (cpu_isar_feature(aa64_nmi, env_archcpu(env))) {
+ if (interrupt_request & CPU_INTERRUPT_NMI) {
+ excp_idx = EXCP_NMI;
+ target_el = arm_phys_excp_target_el(cs, excp_idx, cur_el, secure);
+ if (arm_excp_unmasked(cs, excp_idx, target_el,
+ cur_el, secure, hcr_el2)) {
+ goto found;
+ }
+ }
+ if (interrupt_request & CPU_INTERRUPT_VNMI) {
+ excp_idx = EXCP_VNMI;
+ target_el = arm_phys_excp_target_el(cs, excp_idx, cur_el, secure);
+ if (arm_excp_unmasked(cs, excp_idx, target_el,
+ cur_el, secure, hcr_el2)) {
+ goto found;
+ }
+ }
+ }
if (interrupt_request & CPU_INTERRUPT_FIQ) {
excp_idx = EXCP_FIQ;
target_el = arm_phys_excp_target_el(cs, excp_idx, cur_el, secure);
@@ -900,6 +945,31 @@ void arm_cpu_update_vfiq(ARMCPU *cpu)
}
}
+void arm_cpu_update_vnmi(ARMCPU *cpu)
+{
+ /*
+ * Update the interrupt level for VNMI, which is the logical OR of
+ * the HCRX_EL2.VINMI or HCRX_EL2.VFNMI bit and the input line level from
+ * the GIC.
+ */
+ CPUARMState *env = &cpu->env;
+ CPUState *cs = CPU(cpu);
+
+ bool new_state = ((env->cp15.hcr_el2 & HCR_VI) &&
+ (env->cp15.hcrx_el2 & HCRX_VINMI)) ||
+ ((env->cp15.hcr_el2 & HCR_VF) &&
+ (env->cp15.hcrx_el2 & HCRX_VFNMI)) ||
+ (env->irq_line_state & CPU_INTERRUPT_VNMI);
+
+ if (new_state != ((cs->interrupt_request & CPU_INTERRUPT_VNMI) != 0)) {
+ if (new_state) {
+ cpu_interrupt(cs, CPU_INTERRUPT_VNMI);
+ } else {
+ cpu_reset_interrupt(cs, CPU_INTERRUPT_VNMI);
+ }
+ }
+}
+
void arm_cpu_update_vserr(ARMCPU *cpu)
{
/*
@@ -929,7 +999,9 @@ static void arm_cpu_set_irq(void *opaque, int irq, int
level)
[ARM_CPU_IRQ] = CPU_INTERRUPT_HARD,
[ARM_CPU_FIQ] = CPU_INTERRUPT_FIQ,
[ARM_CPU_VIRQ] = CPU_INTERRUPT_VIRQ,
- [ARM_CPU_VFIQ] = CPU_INTERRUPT_VFIQ
+ [ARM_CPU_VFIQ] = CPU_INTERRUPT_VFIQ,
+ [ARM_CPU_NMI] = CPU_INTERRUPT_NMI,
+ [ARM_CPU_VNMI] = CPU_INTERRUPT_VNMI
};
if (!arm_feature(env, ARM_FEATURE_EL2) &&
@@ -955,8 +1027,12 @@ static void arm_cpu_set_irq(void *opaque, int irq, int
level)
case ARM_CPU_VFIQ:
arm_cpu_update_vfiq(cpu);
break;
+ case ARM_CPU_VNMI:
+ arm_cpu_update_vnmi(cpu);
+ break;
case ARM_CPU_IRQ:
case ARM_CPU_FIQ:
+ case ARM_CPU_NMI:
if (level) {
cpu_interrupt(cs, mask[irq]);
} else {
@@ -1355,7 +1431,7 @@ static void arm_cpu_initfn(Object *obj)
*/
qdev_init_gpio_in(DEVICE(cpu), arm_cpu_kvm_set_irq, 4);
} else {
- qdev_init_gpio_in(DEVICE(cpu), arm_cpu_set_irq, 4);
+ qdev_init_gpio_in(DEVICE(cpu), arm_cpu_set_irq, 6);
}
qdev_init_gpio_out(DEVICE(cpu), cpu->gt_timer_outputs,
diff --git a/target/arm/cpu.h b/target/arm/cpu.h
index abb453f733..6aa9f1e9ba 100644
--- a/target/arm/cpu.h
+++ b/target/arm/cpu.h
@@ -60,6 +60,8 @@
#define EXCP_DIVBYZERO 23 /* v7M DIVBYZERO UsageFault */
#define EXCP_VSERR 24
#define EXCP_GPC 25 /* v9 Granule Protection Check Fault */
+#define EXCP_NMI 26
+#define EXCP_VNMI 27
/* NB: add new EXCP_ defines to the array in arm_log_exception() too */
#define ARMV7M_EXCP_RESET 1
@@ -79,6 +81,8 @@
#define CPU_INTERRUPT_VIRQ CPU_INTERRUPT_TGT_EXT_2
#define CPU_INTERRUPT_VFIQ CPU_INTERRUPT_TGT_EXT_3
#define CPU_INTERRUPT_VSERR CPU_INTERRUPT_TGT_INT_0
+#define CPU_INTERRUPT_NMI CPU_INTERRUPT_TGT_EXT_4
+#define CPU_INTERRUPT_VNMI CPU_INTERRUPT_TGT_EXT_0
/* The usual mapping for an AArch64 system register to its AArch32
* counterpart is for the 32 bit world to have access to the lower
diff --git a/target/arm/helper.c b/target/arm/helper.c
index 497b6e4bdf..4b4c8e279d 100644
--- a/target/arm/helper.c
+++ b/target/arm/helper.c
@@ -10628,6 +10628,8 @@ void arm_log_exception(CPUState *cs)
[EXCP_DIVBYZERO] = "v7M DIVBYZERO UsageFault",
[EXCP_VSERR] = "Virtual SERR",
[EXCP_GPC] = "Granule Protection Check",
+ [EXCP_NMI] = "NMI",
+ [EXCP_VNMI] = "Virtual NMI"
};
if (idx >= 0 && idx < ARRAY_SIZE(excnames)) {
diff --git a/target/arm/internals.h b/target/arm/internals.h
index fee65caba5..4ff19b1b44 100644
--- a/target/arm/internals.h
+++ b/target/arm/internals.h
@@ -958,6 +958,16 @@ void arm_cpu_update_virq(ARMCPU *cpu);
*/
void arm_cpu_update_vfiq(ARMCPU *cpu);
+/**
+ * arm_cpu_update_vnmi: Update CPU_INTERRUPT_VNMI bit in cs->interrupt_request
+ *
+ * Update the CPU_INTERRUPT_VNMI bit in cs->interrupt_request, following
+ * a change to either the input VNMI line from the GIC or the HCRX_EL2.VINMI
+ * or the HCRX_EL2.VFNMI.
+ * Must be called with the BQL held.
+ */
+void arm_cpu_update_vnmi(ARMCPU *cpu);
+
/**
* arm_cpu_update_vserr: Update CPU_INTERRUPT_VSERR bit
*
--
2.34.1
