[04/19] KVM: PPC: Book3S HV: export services for the XIVE native exploitation device
diff mbox series

Message ID 20190107184331.8429-5-clg@kaod.org
State Changes Requested
Headers show
Series
  • KVM: PPC: Book3S HV: add XIVE native exploitation mode
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Commit Message

Cédric Le Goater Jan. 7, 2019, 6:43 p.m. UTC
The KVM device for the XIVE native exploitation mode will reuse the
structures of the XICS-over-XIVE glue implementation. Some code will
also be shared : source block creation and destruction, target
selection and escalation attachment.

Signed-off-by: Cédric Le Goater <clg@kaod.org>
---
 arch/powerpc/kvm/book3s_xive.h | 11 +++++
 arch/powerpc/kvm/book3s_xive.c | 89 +++++++++++++++++++---------------
 2 files changed, 62 insertions(+), 38 deletions(-)

Comments

David Gibson Jan. 11, 2019, 4:09 a.m. UTC | #1
On Mon, Jan 07, 2019 at 07:43:16PM +0100, Cédric Le Goater wrote:
> The KVM device for the XIVE native exploitation mode will reuse the
> structures of the XICS-over-XIVE glue implementation. Some code will
> also be shared : source block creation and destruction, target
> selection and escalation attachment.
> 
> Signed-off-by: Cédric Le Goater <clg@kaod.org>

Reviewed-by: David Gibson <david@gibson.dropbear.id.au>

> ---
>  arch/powerpc/kvm/book3s_xive.h | 11 +++++
>  arch/powerpc/kvm/book3s_xive.c | 89 +++++++++++++++++++---------------
>  2 files changed, 62 insertions(+), 38 deletions(-)
> 
> diff --git a/arch/powerpc/kvm/book3s_xive.h b/arch/powerpc/kvm/book3s_xive.h
> index a08ae6fd4c51..10c4aa5cd010 100644
> --- a/arch/powerpc/kvm/book3s_xive.h
> +++ b/arch/powerpc/kvm/book3s_xive.h
> @@ -248,5 +248,16 @@ extern int (*__xive_vm_h_ipi)(struct kvm_vcpu *vcpu, unsigned long server,
>  extern int (*__xive_vm_h_cppr)(struct kvm_vcpu *vcpu, unsigned long cppr);
>  extern int (*__xive_vm_h_eoi)(struct kvm_vcpu *vcpu, unsigned long xirr);
>  
> +/*
> + * Common Xive routines for XICS-over-XIVE and XIVE native
> + */
> +struct kvmppc_xive_src_block *kvmppc_xive_create_src_block(
> +	struct kvmppc_xive *xive, int irq);
> +void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb);
> +int kvmppc_xive_select_target(struct kvm *kvm, u32 *server, u8 prio);
> +void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu);
> +int kvmppc_xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio);
> +int kvmppc_xive_debug_show_queues(struct seq_file *m, struct kvm_vcpu *vcpu);
> +
>  #endif /* CONFIG_KVM_XICS */
>  #endif /* _KVM_PPC_BOOK3S_XICS_H */
> diff --git a/arch/powerpc/kvm/book3s_xive.c b/arch/powerpc/kvm/book3s_xive.c
> index 8a4fa45f07f8..bb5d32f7e4e6 100644
> --- a/arch/powerpc/kvm/book3s_xive.c
> +++ b/arch/powerpc/kvm/book3s_xive.c
> @@ -166,7 +166,7 @@ static irqreturn_t xive_esc_irq(int irq, void *data)
>  	return IRQ_HANDLED;
>  }
>  
> -static int xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio)
> +int kvmppc_xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio)
>  {
>  	struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
>  	struct xive_q *q = &xc->queues[prio];
> @@ -291,7 +291,7 @@ static int xive_check_provisioning(struct kvm *kvm, u8 prio)
>  			continue;
>  		rc = xive_provision_queue(vcpu, prio);
>  		if (rc == 0 && !xive->single_escalation)
> -			xive_attach_escalation(vcpu, prio);
> +			kvmppc_xive_attach_escalation(vcpu, prio);
>  		if (rc)
>  			return rc;
>  	}
> @@ -342,7 +342,7 @@ static int xive_try_pick_queue(struct kvm_vcpu *vcpu, u8 prio)
>  	return atomic_add_unless(&q->count, 1, max) ? 0 : -EBUSY;
>  }
>  
> -static int xive_select_target(struct kvm *kvm, u32 *server, u8 prio)
> +int kvmppc_xive_select_target(struct kvm *kvm, u32 *server, u8 prio)
>  {
>  	struct kvm_vcpu *vcpu;
>  	int i, rc;
> @@ -535,7 +535,7 @@ static int xive_target_interrupt(struct kvm *kvm,
>  	 * priority. The count for that new target will have
>  	 * already been incremented.
>  	 */
> -	rc = xive_select_target(kvm, &server, prio);
> +	rc = kvmppc_xive_select_target(kvm, &server, prio);
>  
>  	/*
>  	 * We failed to find a target ? Not much we can do
> @@ -1055,7 +1055,7 @@ int kvmppc_xive_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
>  }
>  EXPORT_SYMBOL_GPL(kvmppc_xive_clr_mapped);
>  
> -static void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu)
> +void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu)
>  {
>  	struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
>  	struct kvm *kvm = vcpu->kvm;
> @@ -1225,7 +1225,7 @@ int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
>  		if (xive->qmap & (1 << i)) {
>  			r = xive_provision_queue(vcpu, i);
>  			if (r == 0 && !xive->single_escalation)
> -				xive_attach_escalation(vcpu, i);
> +				kvmppc_xive_attach_escalation(vcpu, i);
>  			if (r)
>  				goto bail;
>  		} else {
> @@ -1240,7 +1240,7 @@ int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
>  	}
>  
>  	/* If not done above, attach priority 0 escalation */
> -	r = xive_attach_escalation(vcpu, 0);
> +	r = kvmppc_xive_attach_escalation(vcpu, 0);
>  	if (r)
>  		goto bail;
>  
> @@ -1491,8 +1491,8 @@ static int xive_get_source(struct kvmppc_xive *xive, long irq, u64 addr)
>  	return 0;
>  }
>  
> -static struct kvmppc_xive_src_block *xive_create_src_block(struct kvmppc_xive *xive,
> -							   int irq)
> +struct kvmppc_xive_src_block *kvmppc_xive_create_src_block(
> +	struct kvmppc_xive *xive, int irq)
>  {
>  	struct kvm *kvm = xive->kvm;
>  	struct kvmppc_xive_src_block *sb;
> @@ -1571,7 +1571,7 @@ static int xive_set_source(struct kvmppc_xive *xive, long irq, u64 addr)
>  	sb = kvmppc_xive_find_source(xive, irq, &idx);
>  	if (!sb) {
>  		pr_devel("No source, creating source block...\n");
> -		sb = xive_create_src_block(xive, irq);
> +		sb = kvmppc_xive_create_src_block(xive, irq);
>  		if (!sb) {
>  			pr_devel("Failed to create block...\n");
>  			return -ENOMEM;
> @@ -1795,7 +1795,7 @@ static void kvmppc_xive_cleanup_irq(u32 hw_num, struct xive_irq_data *xd)
>  	xive_cleanup_irq_data(xd);
>  }
>  
> -static void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb)
> +void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb)
>  {
>  	int i;
>  
> @@ -1824,6 +1824,8 @@ static void kvmppc_xive_free(struct kvm_device *dev)
>  
>  	debugfs_remove(xive->dentry);
>  
> +	pr_devel("Destroying xive for partition\n");
> +
>  	if (kvm)
>  		kvm->arch.xive = NULL;
>  
> @@ -1889,6 +1891,43 @@ static int kvmppc_xive_create(struct kvm_device *dev, u32 type)
>  	return 0;
>  }
>  
> +int kvmppc_xive_debug_show_queues(struct seq_file *m, struct kvm_vcpu *vcpu)
> +{
> +	struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
> +	unsigned int i;
> +
> +	for (i = 0; i < KVMPPC_XIVE_Q_COUNT; i++) {
> +		struct xive_q *q = &xc->queues[i];
> +		u32 i0, i1, idx;
> +
> +		if (!q->qpage && !xc->esc_virq[i])
> +			continue;
> +
> +		seq_printf(m, " [q%d]: ", i);
> +
> +		if (q->qpage) {
> +			idx = q->idx;
> +			i0 = be32_to_cpup(q->qpage + idx);
> +			idx = (idx + 1) & q->msk;
> +			i1 = be32_to_cpup(q->qpage + idx);
> +			seq_printf(m, "T=%d %08x %08x...\n", q->toggle,
> +				   i0, i1);
> +		}
> +		if (xc->esc_virq[i]) {
> +			struct irq_data *d = irq_get_irq_data(xc->esc_virq[i]);
> +			struct xive_irq_data *xd =
> +				irq_data_get_irq_handler_data(d);
> +			u64 pq = xive_vm_esb_load(xd, XIVE_ESB_GET);
> +
> +			seq_printf(m, "E:%c%c I(%d:%llx:%llx)",
> +				   (pq & XIVE_ESB_VAL_P) ? 'P' : 'p',
> +				   (pq & XIVE_ESB_VAL_Q) ? 'Q' : 'q',
> +				   xc->esc_virq[i], pq, xd->eoi_page);
> +			seq_puts(m, "\n");
> +		}
> +	}
> +	return 0;
> +}
>  
>  static int xive_debug_show(struct seq_file *m, void *private)
>  {
> @@ -1914,7 +1953,6 @@ static int xive_debug_show(struct seq_file *m, void *private)
>  
>  	kvm_for_each_vcpu(i, vcpu, kvm) {
>  		struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
> -		unsigned int i;
>  
>  		if (!xc)
>  			continue;
> @@ -1924,33 +1962,8 @@ static int xive_debug_show(struct seq_file *m, void *private)
>  			   xc->server_num, xc->cppr, xc->hw_cppr,
>  			   xc->mfrr, xc->pending,
>  			   xc->stat_rm_h_xirr, xc->stat_vm_h_xirr);
> -		for (i = 0; i < KVMPPC_XIVE_Q_COUNT; i++) {
> -			struct xive_q *q = &xc->queues[i];
> -			u32 i0, i1, idx;
>  
> -			if (!q->qpage && !xc->esc_virq[i])
> -				continue;
> -
> -			seq_printf(m, " [q%d]: ", i);
> -
> -			if (q->qpage) {
> -				idx = q->idx;
> -				i0 = be32_to_cpup(q->qpage + idx);
> -				idx = (idx + 1) & q->msk;
> -				i1 = be32_to_cpup(q->qpage + idx);
> -				seq_printf(m, "T=%d %08x %08x... \n", q->toggle, i0, i1);
> -			}
> -			if (xc->esc_virq[i]) {
> -				struct irq_data *d = irq_get_irq_data(xc->esc_virq[i]);
> -				struct xive_irq_data *xd = irq_data_get_irq_handler_data(d);
> -				u64 pq = xive_vm_esb_load(xd, XIVE_ESB_GET);
> -				seq_printf(m, "E:%c%c I(%d:%llx:%llx)",
> -					   (pq & XIVE_ESB_VAL_P) ? 'P' : 'p',
> -					   (pq & XIVE_ESB_VAL_Q) ? 'Q' : 'q',
> -					   xc->esc_virq[i], pq, xd->eoi_page);
> -				seq_printf(m, "\n");
> -			}
> -		}
> +		kvmppc_xive_debug_show_queues(m, vcpu);
>  
>  		t_rm_h_xirr += xc->stat_rm_h_xirr;
>  		t_rm_h_ipoll += xc->stat_rm_h_ipoll;

Patch
diff mbox series

diff --git a/arch/powerpc/kvm/book3s_xive.h b/arch/powerpc/kvm/book3s_xive.h
index a08ae6fd4c51..10c4aa5cd010 100644
--- a/arch/powerpc/kvm/book3s_xive.h
+++ b/arch/powerpc/kvm/book3s_xive.h
@@ -248,5 +248,16 @@  extern int (*__xive_vm_h_ipi)(struct kvm_vcpu *vcpu, unsigned long server,
 extern int (*__xive_vm_h_cppr)(struct kvm_vcpu *vcpu, unsigned long cppr);
 extern int (*__xive_vm_h_eoi)(struct kvm_vcpu *vcpu, unsigned long xirr);
 
+/*
+ * Common Xive routines for XICS-over-XIVE and XIVE native
+ */
+struct kvmppc_xive_src_block *kvmppc_xive_create_src_block(
+	struct kvmppc_xive *xive, int irq);
+void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb);
+int kvmppc_xive_select_target(struct kvm *kvm, u32 *server, u8 prio);
+void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu);
+int kvmppc_xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio);
+int kvmppc_xive_debug_show_queues(struct seq_file *m, struct kvm_vcpu *vcpu);
+
 #endif /* CONFIG_KVM_XICS */
 #endif /* _KVM_PPC_BOOK3S_XICS_H */
diff --git a/arch/powerpc/kvm/book3s_xive.c b/arch/powerpc/kvm/book3s_xive.c
index 8a4fa45f07f8..bb5d32f7e4e6 100644
--- a/arch/powerpc/kvm/book3s_xive.c
+++ b/arch/powerpc/kvm/book3s_xive.c
@@ -166,7 +166,7 @@  static irqreturn_t xive_esc_irq(int irq, void *data)
 	return IRQ_HANDLED;
 }
 
-static int xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio)
+int kvmppc_xive_attach_escalation(struct kvm_vcpu *vcpu, u8 prio)
 {
 	struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
 	struct xive_q *q = &xc->queues[prio];
@@ -291,7 +291,7 @@  static int xive_check_provisioning(struct kvm *kvm, u8 prio)
 			continue;
 		rc = xive_provision_queue(vcpu, prio);
 		if (rc == 0 && !xive->single_escalation)
-			xive_attach_escalation(vcpu, prio);
+			kvmppc_xive_attach_escalation(vcpu, prio);
 		if (rc)
 			return rc;
 	}
@@ -342,7 +342,7 @@  static int xive_try_pick_queue(struct kvm_vcpu *vcpu, u8 prio)
 	return atomic_add_unless(&q->count, 1, max) ? 0 : -EBUSY;
 }
 
-static int xive_select_target(struct kvm *kvm, u32 *server, u8 prio)
+int kvmppc_xive_select_target(struct kvm *kvm, u32 *server, u8 prio)
 {
 	struct kvm_vcpu *vcpu;
 	int i, rc;
@@ -535,7 +535,7 @@  static int xive_target_interrupt(struct kvm *kvm,
 	 * priority. The count for that new target will have
 	 * already been incremented.
 	 */
-	rc = xive_select_target(kvm, &server, prio);
+	rc = kvmppc_xive_select_target(kvm, &server, prio);
 
 	/*
 	 * We failed to find a target ? Not much we can do
@@ -1055,7 +1055,7 @@  int kvmppc_xive_clr_mapped(struct kvm *kvm, unsigned long guest_irq,
 }
 EXPORT_SYMBOL_GPL(kvmppc_xive_clr_mapped);
 
-static void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu)
+void kvmppc_xive_disable_vcpu_interrupts(struct kvm_vcpu *vcpu)
 {
 	struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
 	struct kvm *kvm = vcpu->kvm;
@@ -1225,7 +1225,7 @@  int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
 		if (xive->qmap & (1 << i)) {
 			r = xive_provision_queue(vcpu, i);
 			if (r == 0 && !xive->single_escalation)
-				xive_attach_escalation(vcpu, i);
+				kvmppc_xive_attach_escalation(vcpu, i);
 			if (r)
 				goto bail;
 		} else {
@@ -1240,7 +1240,7 @@  int kvmppc_xive_connect_vcpu(struct kvm_device *dev,
 	}
 
 	/* If not done above, attach priority 0 escalation */
-	r = xive_attach_escalation(vcpu, 0);
+	r = kvmppc_xive_attach_escalation(vcpu, 0);
 	if (r)
 		goto bail;
 
@@ -1491,8 +1491,8 @@  static int xive_get_source(struct kvmppc_xive *xive, long irq, u64 addr)
 	return 0;
 }
 
-static struct kvmppc_xive_src_block *xive_create_src_block(struct kvmppc_xive *xive,
-							   int irq)
+struct kvmppc_xive_src_block *kvmppc_xive_create_src_block(
+	struct kvmppc_xive *xive, int irq)
 {
 	struct kvm *kvm = xive->kvm;
 	struct kvmppc_xive_src_block *sb;
@@ -1571,7 +1571,7 @@  static int xive_set_source(struct kvmppc_xive *xive, long irq, u64 addr)
 	sb = kvmppc_xive_find_source(xive, irq, &idx);
 	if (!sb) {
 		pr_devel("No source, creating source block...\n");
-		sb = xive_create_src_block(xive, irq);
+		sb = kvmppc_xive_create_src_block(xive, irq);
 		if (!sb) {
 			pr_devel("Failed to create block...\n");
 			return -ENOMEM;
@@ -1795,7 +1795,7 @@  static void kvmppc_xive_cleanup_irq(u32 hw_num, struct xive_irq_data *xd)
 	xive_cleanup_irq_data(xd);
 }
 
-static void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb)
+void kvmppc_xive_free_sources(struct kvmppc_xive_src_block *sb)
 {
 	int i;
 
@@ -1824,6 +1824,8 @@  static void kvmppc_xive_free(struct kvm_device *dev)
 
 	debugfs_remove(xive->dentry);
 
+	pr_devel("Destroying xive for partition\n");
+
 	if (kvm)
 		kvm->arch.xive = NULL;
 
@@ -1889,6 +1891,43 @@  static int kvmppc_xive_create(struct kvm_device *dev, u32 type)
 	return 0;
 }
 
+int kvmppc_xive_debug_show_queues(struct seq_file *m, struct kvm_vcpu *vcpu)
+{
+	struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
+	unsigned int i;
+
+	for (i = 0; i < KVMPPC_XIVE_Q_COUNT; i++) {
+		struct xive_q *q = &xc->queues[i];
+		u32 i0, i1, idx;
+
+		if (!q->qpage && !xc->esc_virq[i])
+			continue;
+
+		seq_printf(m, " [q%d]: ", i);
+
+		if (q->qpage) {
+			idx = q->idx;
+			i0 = be32_to_cpup(q->qpage + idx);
+			idx = (idx + 1) & q->msk;
+			i1 = be32_to_cpup(q->qpage + idx);
+			seq_printf(m, "T=%d %08x %08x...\n", q->toggle,
+				   i0, i1);
+		}
+		if (xc->esc_virq[i]) {
+			struct irq_data *d = irq_get_irq_data(xc->esc_virq[i]);
+			struct xive_irq_data *xd =
+				irq_data_get_irq_handler_data(d);
+			u64 pq = xive_vm_esb_load(xd, XIVE_ESB_GET);
+
+			seq_printf(m, "E:%c%c I(%d:%llx:%llx)",
+				   (pq & XIVE_ESB_VAL_P) ? 'P' : 'p',
+				   (pq & XIVE_ESB_VAL_Q) ? 'Q' : 'q',
+				   xc->esc_virq[i], pq, xd->eoi_page);
+			seq_puts(m, "\n");
+		}
+	}
+	return 0;
+}
 
 static int xive_debug_show(struct seq_file *m, void *private)
 {
@@ -1914,7 +1953,6 @@  static int xive_debug_show(struct seq_file *m, void *private)
 
 	kvm_for_each_vcpu(i, vcpu, kvm) {
 		struct kvmppc_xive_vcpu *xc = vcpu->arch.xive_vcpu;
-		unsigned int i;
 
 		if (!xc)
 			continue;
@@ -1924,33 +1962,8 @@  static int xive_debug_show(struct seq_file *m, void *private)
 			   xc->server_num, xc->cppr, xc->hw_cppr,
 			   xc->mfrr, xc->pending,
 			   xc->stat_rm_h_xirr, xc->stat_vm_h_xirr);
-		for (i = 0; i < KVMPPC_XIVE_Q_COUNT; i++) {
-			struct xive_q *q = &xc->queues[i];
-			u32 i0, i1, idx;
 
-			if (!q->qpage && !xc->esc_virq[i])
-				continue;
-
-			seq_printf(m, " [q%d]: ", i);
-
-			if (q->qpage) {
-				idx = q->idx;
-				i0 = be32_to_cpup(q->qpage + idx);
-				idx = (idx + 1) & q->msk;
-				i1 = be32_to_cpup(q->qpage + idx);
-				seq_printf(m, "T=%d %08x %08x... \n", q->toggle, i0, i1);
-			}
-			if (xc->esc_virq[i]) {
-				struct irq_data *d = irq_get_irq_data(xc->esc_virq[i]);
-				struct xive_irq_data *xd = irq_data_get_irq_handler_data(d);
-				u64 pq = xive_vm_esb_load(xd, XIVE_ESB_GET);
-				seq_printf(m, "E:%c%c I(%d:%llx:%llx)",
-					   (pq & XIVE_ESB_VAL_P) ? 'P' : 'p',
-					   (pq & XIVE_ESB_VAL_Q) ? 'Q' : 'q',
-					   xc->esc_virq[i], pq, xd->eoi_page);
-				seq_printf(m, "\n");
-			}
-		}
+		kvmppc_xive_debug_show_queues(m, vcpu);
 
 		t_rm_h_xirr += xc->stat_rm_h_xirr;
 		t_rm_h_ipoll += xc->stat_rm_h_ipoll;