[PATCH v3 0/5] KVM: X86: Cleanups on dest_mode and headers

[PATCH v3 0/5] KVM: X86: Cleanups on dest_mode and headers

[Peter Xu]

v3:
- address all the comments from both Vitaly and Sean
- since at it, added patches:
  "KVM: X86: Fix kvm_bitmap_or_dest_vcpus() to use irq shorthand"
  "KVM: X86: Drop KVM_APIC_SHORT_MASK and KVM_APIC_DEST_MASK"

Each patch explains itself.

Please have a look, thanks.

Peter Xu (5):
  KVM: X86: Fix kvm_bitmap_or_dest_vcpus() to use irq shorthand
  KVM: X86: Move irrelevant declarations out of ioapic.h
  KVM: X86: Use APIC_DEST_* macros properly in kvm_lapic_irq.dest_mode
  KVM: X86: Drop KVM_APIC_SHORT_MASK and KVM_APIC_DEST_MASK
  KVM: X86: Fix callers of kvm_apic_match_dest() to use correct macros

 arch/x86/include/asm/kvm_host.h |  5 +++++
 arch/x86/kvm/hyperv.c           |  1 +
 arch/x86/kvm/ioapic.c           | 19 ++++++++++++-------
 arch/x86/kvm/ioapic.h           |  6 ------
 arch/x86/kvm/irq.h              |  3 +++
 arch/x86/kvm/irq_comm.c         | 10 ++++++----
 arch/x86/kvm/lapic.c            |  5 +----
 arch/x86/kvm/lapic.h            |  7 ++++---
 arch/x86/kvm/svm.c              |  4 ++--
 arch/x86/kvm/x86.c              |  2 +-
 10 files changed, 35 insertions(+), 27 deletions(-)

-- 
2.21.0

[PATCH v3 1/5] KVM: X86: Fix kvm_bitmap_or_dest_vcpus() to use irq shorthand

[Peter Xu]

The 3rd parameter of kvm_apic_match_dest() is the irq shorthand,
rather than the irq delivery mode.

Fixes: 7ee30bc132c683d06a6d9e360e39e483e3990708
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 arch/x86/kvm/lapic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index cf9177b4a07f..1eabe58bb6d5 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1151,7 +1151,7 @@ void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq,
 			if (!kvm_apic_present(vcpu))
 				continue;
 			if (!kvm_apic_match_dest(vcpu, NULL,
-						 irq->delivery_mode,
+						 irq->shorthand,
 						 irq->dest_id,
 						 irq->dest_mode))
 				continue;
-- 
2.21.0

[PATCH v3 2/5] KVM: X86: Move irrelevant declarations out of ioapic.h

[Peter Xu]

kvm_apic_match_dest() is declared in both ioapic.h and lapic.h.
Removing the declaration in ioapic.h.

kvm_apic_compare_prio() is declared in ioapic.h but defined in
lapic.c.  Moving the declaration to lapic.h.

kvm_irq_delivery_to_apic() is declared in ioapic.h but defined in
irq_comm.c.  Moving the declaration to irq.h.

While at it, include irq.h in hyperv.c because it needs to use
kvm_irq_delivery_to_apic().

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 arch/x86/kvm/hyperv.c | 1 +
 arch/x86/kvm/ioapic.h | 6 ------
 arch/x86/kvm/irq.h    | 3 +++
 arch/x86/kvm/lapic.h  | 2 +-
 4 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
index 23ff65504d7e..c7d4640b7b1c 100644
--- a/arch/x86/kvm/hyperv.c
+++ b/arch/x86/kvm/hyperv.c
@@ -33,6 +33,7 @@
 #include <trace/events/kvm.h>
 
 #include "trace.h"
+#include "irq.h"
 
 #define KVM_HV_MAX_SPARSE_VCPU_SET_BITS DIV_ROUND_UP(KVM_MAX_VCPUS, 64)
 
diff --git a/arch/x86/kvm/ioapic.h b/arch/x86/kvm/ioapic.h
index ea1a4e0297da..2fb2e3c80724 100644
--- a/arch/x86/kvm/ioapic.h
+++ b/arch/x86/kvm/ioapic.h
@@ -116,9 +116,6 @@ static inline int ioapic_in_kernel(struct kvm *kvm)
 }
 
 void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
-bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
-		int short_hand, unsigned int dest, int dest_mode);
-int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
 			int trigger_mode);
 int kvm_ioapic_init(struct kvm *kvm);
@@ -126,9 +123,6 @@ void kvm_ioapic_destroy(struct kvm *kvm);
 int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
 		       int level, bool line_status);
 void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
-int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
-			     struct kvm_lapic_irq *irq,
-			     struct dest_map *dest_map);
 void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
 void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h
index 7c6233d37c64..f173ab6b407e 100644
--- a/arch/x86/kvm/irq.h
+++ b/arch/x86/kvm/irq.h
@@ -113,5 +113,8 @@ int apic_has_pending_timer(struct kvm_vcpu *vcpu);
 
 int kvm_setup_default_irq_routing(struct kvm *kvm);
 int kvm_setup_empty_irq_routing(struct kvm *kvm);
+int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
+			     struct kvm_lapic_irq *irq,
+			     struct dest_map *dest_map);
 
 #endif
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 39925afdfcdc..0b9bbadd1f3c 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -83,7 +83,7 @@ int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
 		       void *data);
 bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
 			   int short_hand, unsigned int dest, int dest_mode);
-
+int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
 bool __kvm_apic_update_irr(u32 *pir, void *regs, int *max_irr);
 bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir, int *max_irr);
 void kvm_apic_update_ppr(struct kvm_vcpu *vcpu);
-- 
2.21.0

[PATCH v3 3/5] KVM: X86: Use APIC_DEST_* macros properly in kvm_lapic_irq.dest_mode

[Peter Xu]

We were using either APIC_DEST_PHYSICAL|APIC_DEST_LOGICAL or 0|1 to
fill in kvm_lapic_irq.dest_mode.  It's fine only because in most cases
when we check against dest_mode it's against APIC_DEST_PHYSICAL (which
equals to 0).  However, that's not consistent.  We'll have problem
when we want to start checking against APIC_DEST_PHYSICAL, which does
not equals to 1.

This patch firstly introduces kvm_lapic_irq_dest_mode() helper to take
any boolean of destination mode and return the APIC_DEST_* macro.
Then, it replaces the 0|1 settings of irq.dest_mode with the helper.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 arch/x86/include/asm/kvm_host.h | 5 +++++
 arch/x86/kvm/ioapic.c           | 8 +++++---
 arch/x86/kvm/irq_comm.c         | 7 ++++---
 arch/x86/kvm/x86.c              | 2 +-
 4 files changed, 15 insertions(+), 7 deletions(-)

diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
index b79cd6aa4075..f815c97b1b57 100644
--- a/arch/x86/include/asm/kvm_host.h
+++ b/arch/x86/include/asm/kvm_host.h
@@ -1022,6 +1022,11 @@ struct kvm_lapic_irq {
 	bool msi_redir_hint;
 };
 
+static inline u16 kvm_lapic_irq_dest_mode(bool dest_mode)
+{
+	return dest_mode ? APIC_DEST_LOGICAL : APIC_DEST_PHYSICAL;
+}
+
 struct kvm_x86_ops {
 	int (*cpu_has_kvm_support)(void);          /* __init */
 	int (*disabled_by_bios)(void);             /* __init */
diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
index 9fd2dd89a1c5..901d85237d1c 100644
--- a/arch/x86/kvm/ioapic.c
+++ b/arch/x86/kvm/ioapic.c
@@ -331,7 +331,8 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
 			irq.vector = e->fields.vector;
 			irq.delivery_mode = e->fields.delivery_mode << 8;
 			irq.dest_id = e->fields.dest_id;
-			irq.dest_mode = e->fields.dest_mode;
+			irq.dest_mode =
+			    kvm_lapic_irq_dest_mode(e->fields.dest_mode);
 			bitmap_zero(&vcpu_bitmap, 16);
 			kvm_bitmap_or_dest_vcpus(ioapic->kvm, &irq,
 						 &vcpu_bitmap);
@@ -343,7 +344,8 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
 				 * keep ioapic_handled_vectors synchronized.
 				 */
 				irq.dest_id = old_dest_id;
-				irq.dest_mode = old_dest_mode;
+				irq.dest_mode =
+				    kvm_lapic_irq_dest_mode(e->fields.dest_mode);
 				kvm_bitmap_or_dest_vcpus(ioapic->kvm, &irq,
 							 &vcpu_bitmap);
 			}
@@ -369,7 +371,7 @@ static int ioapic_service(struct kvm_ioapic *ioapic, int irq, bool line_status)
 
 	irqe.dest_id = entry->fields.dest_id;
 	irqe.vector = entry->fields.vector;
-	irqe.dest_mode = entry->fields.dest_mode;
+	irqe.dest_mode = kvm_lapic_irq_dest_mode(entry->fields.dest_mode);
 	irqe.trig_mode = entry->fields.trig_mode;
 	irqe.delivery_mode = entry->fields.delivery_mode << 8;
 	irqe.level = 1;
diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
index 8ecd48d31800..5f59e5ebdbed 100644
--- a/arch/x86/kvm/irq_comm.c
+++ b/arch/x86/kvm/irq_comm.c
@@ -52,8 +52,8 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
 	unsigned long dest_vcpu_bitmap[BITS_TO_LONGS(KVM_MAX_VCPUS)];
 	unsigned int dest_vcpus = 0;
 
-	if (irq->dest_mode == 0 && irq->dest_id == 0xff &&
-			kvm_lowest_prio_delivery(irq)) {
+	if (irq->dest_mode == APIC_DEST_PHYSICAL &&
+	    irq->dest_id == 0xff && kvm_lowest_prio_delivery(irq)) {
 		printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
 		irq->delivery_mode = APIC_DM_FIXED;
 	}
@@ -114,7 +114,8 @@ void kvm_set_msi_irq(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e,
 		irq->dest_id |= MSI_ADDR_EXT_DEST_ID(e->msi.address_hi);
 	irq->vector = (e->msi.data &
 			MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
-	irq->dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo;
+	irq->dest_mode = kvm_lapic_irq_dest_mode(
+	    (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo);
 	irq->trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data;
 	irq->delivery_mode = e->msi.data & 0x700;
 	irq->msi_redir_hint = ((e->msi.address_lo
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 3ed167e039e5..3b00d662dc14 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7356,7 +7356,7 @@ static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid)
 	struct kvm_lapic_irq lapic_irq;
 
 	lapic_irq.shorthand = 0;
-	lapic_irq.dest_mode = 0;
+	lapic_irq.dest_mode = APIC_DEST_PHYSICAL;
 	lapic_irq.level = 0;
 	lapic_irq.dest_id = apicid;
 	lapic_irq.msi_redir_hint = false;
-- 
2.21.0

[PATCH v3 4/5] KVM: X86: Drop KVM_APIC_SHORT_MASK and KVM_APIC_DEST_MASK

[Peter Xu]

We have both APIC_SHORT_MASK and KVM_APIC_SHORT_MASK defined for the
shorthand mask.  Similarly, we have both APIC_DEST_MASK and
KVM_APIC_DEST_MASK defined for the destination mode mask.

Drop the KVM_APIC_* macros and replace the only user of them to use
the APIC_DEST_* macros instead.  At the meantime, move APIC_SHORT_MASK
and APIC_DEST_MASK from lapic.c to lapic.h.

Signed-off-by: Peter Xu <peterx@redhat.com>
---
 arch/x86/kvm/lapic.c | 3 ---
 arch/x86/kvm/lapic.h | 5 +++--
 arch/x86/kvm/svm.c   | 4 ++--
 3 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 1eabe58bb6d5..805c18178bbf 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -56,9 +56,6 @@
 #define APIC_VERSION			(0x14UL | ((KVM_APIC_LVT_NUM - 1) << 16))
 #define LAPIC_MMIO_LENGTH		(1 << 12)
 /* followed define is not in apicdef.h */
-#define APIC_SHORT_MASK			0xc0000
-#define APIC_DEST_NOSHORT		0x0
-#define APIC_DEST_MASK			0x800
 #define MAX_APIC_VECTOR			256
 #define APIC_VECTORS_PER_REG		32
 
diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
index 0b9bbadd1f3c..5a9f29ed9a4b 100644
--- a/arch/x86/kvm/lapic.h
+++ b/arch/x86/kvm/lapic.h
@@ -10,8 +10,9 @@
 #define KVM_APIC_SIPI		1
 #define KVM_APIC_LVT_NUM	6
 
-#define KVM_APIC_SHORT_MASK	0xc0000
-#define KVM_APIC_DEST_MASK	0x800
+#define APIC_SHORT_MASK			0xc0000
+#define APIC_DEST_NOSHORT		0x0
+#define APIC_DEST_MASK			0x800
 
 #define APIC_BUS_CYCLE_NS       1
 #define APIC_BUS_FREQUENCY      (1000000000ULL / APIC_BUS_CYCLE_NS)
diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
index 362e874297e4..65a27a7e9cb1 100644
--- a/arch/x86/kvm/svm.c
+++ b/arch/x86/kvm/svm.c
@@ -4519,9 +4519,9 @@ static int avic_incomplete_ipi_interception(struct vcpu_svm *svm)
 		 */
 		kvm_for_each_vcpu(i, vcpu, kvm) {
 			bool m = kvm_apic_match_dest(vcpu, apic,
-						     icrl & KVM_APIC_SHORT_MASK,
+						     icrl & APIC_SHORT_MASK,
 						     GET_APIC_DEST_FIELD(icrh),
-						     icrl & KVM_APIC_DEST_MASK);
+						     icrl & APIC_DEST_MASK);
 
 			if (m && !avic_vcpu_is_running(vcpu))
 				kvm_vcpu_wake_up(vcpu);
-- 
2.21.0

[PATCH v3 5/5] KVM: X86: Fix callers of kvm_apic_match_dest() to use correct macros

[Peter Xu]

Callers of kvm_apic_match_dest() should always pass in APIC_DEST_*
macros for either dest_mode and short_hand parameters.  Fix up all the
callers of kvm_apic_match_dest() that are not following the rule.

Reported-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Signed-off-by: Peter Xu <peterx@redhat.com>
---
 arch/x86/kvm/ioapic.c   | 11 +++++++----
 arch/x86/kvm/irq_comm.c |  3 ++-
 2 files changed, 9 insertions(+), 5 deletions(-)

diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
index 901d85237d1c..1082ca8d11e5 100644
--- a/arch/x86/kvm/ioapic.c
+++ b/arch/x86/kvm/ioapic.c
@@ -108,8 +108,9 @@ static void __rtc_irq_eoi_tracking_restore_one(struct kvm_vcpu *vcpu)
 	union kvm_ioapic_redirect_entry *e;
 
 	e = &ioapic->redirtbl[RTC_GSI];
-	if (!kvm_apic_match_dest(vcpu, NULL, 0,	e->fields.dest_id,
-				e->fields.dest_mode))
+	if (!kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
+				 e->fields.dest_id,
+				 kvm_lapic_irq_dest_mode(e->fields.dest_mode)))
 		return;
 
 	new_val = kvm_apic_pending_eoi(vcpu, e->fields.vector);
@@ -237,6 +238,7 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
 	struct dest_map *dest_map = &ioapic->rtc_status.dest_map;
 	union kvm_ioapic_redirect_entry *e;
 	int index;
+	u16 dm;
 
 	spin_lock(&ioapic->lock);
 
@@ -250,8 +252,9 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
 		if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG ||
 		    kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) ||
 		    index == RTC_GSI) {
-			if (kvm_apic_match_dest(vcpu, NULL, 0,
-			             e->fields.dest_id, e->fields.dest_mode) ||
+			dm = kvm_lapic_irq_dest_mode(e->fields.dest_mode);
+			if (kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
+						e->fields.dest_id, dm) ||
 			    kvm_apic_pending_eoi(vcpu, e->fields.vector))
 				__set_bit(e->fields.vector,
 					  ioapic_handled_vectors);
diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
index 5f59e5ebdbed..e89c2160b39f 100644
--- a/arch/x86/kvm/irq_comm.c
+++ b/arch/x86/kvm/irq_comm.c
@@ -417,7 +417,8 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
 
 			kvm_set_msi_irq(vcpu->kvm, entry, &irq);
 
-			if (irq.level && kvm_apic_match_dest(vcpu, NULL, 0,
+			if (irq.level &&
+			    kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
 						irq.dest_id, irq.dest_mode))
 				__set_bit(irq.vector, ioapic_handled_vectors);
 		}
-- 
2.21.0

Re: [PATCH v3 1/5] KVM: X86: Fix kvm_bitmap_or_dest_vcpus() to use irq shorthand

[Vitaly Kuznetsov]

Peter Xu <peterx@redhat.com> writes:

> The 3rd parameter of kvm_apic_match_dest() is the irq shorthand,
> rather than the irq delivery mode.
>
> Fixes: 7ee30bc132c683d06a6d9e360e39e483e3990708

Better expressed as

Fixes: 7ee30bc132c6 ("KVM: x86: deliver KVM IOAPIC scan request to target vCPUs")

> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  arch/x86/kvm/lapic.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
> index cf9177b4a07f..1eabe58bb6d5 100644
> --- a/arch/x86/kvm/lapic.c
> +++ b/arch/x86/kvm/lapic.c
> @@ -1151,7 +1151,7 @@ void kvm_bitmap_or_dest_vcpus(struct kvm *kvm, struct kvm_lapic_irq *irq,
>  			if (!kvm_apic_present(vcpu))
>  				continue;
>  			if (!kvm_apic_match_dest(vcpu, NULL,
> -						 irq->delivery_mode,
> +						 irq->shorthand,
>  						 irq->dest_id,
>  						 irq->dest_mode))
>  				continue;

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

-- 
Vitaly

Re: [PATCH v3 2/5] KVM: X86: Move irrelevant declarations out of ioapic.h

[Vitaly Kuznetsov]

Peter Xu <peterx@redhat.com> writes:

> kvm_apic_match_dest() is declared in both ioapic.h and lapic.h.
> Removing the declaration in ioapic.h.
>
> kvm_apic_compare_prio() is declared in ioapic.h but defined in
> lapic.c.  Moving the declaration to lapic.h.
>
> kvm_irq_delivery_to_apic() is declared in ioapic.h but defined in
> irq_comm.c.  Moving the declaration to irq.h.

Nitpicking: 'imperative mode' requested by Sean would be "remove the
declaration", "move the declaration",...

>
> While at it, include irq.h in hyperv.c because it needs to use
> kvm_irq_delivery_to_apic().

"While at it" is being used when you are trying to squeeze in a (small)
unrelated change (fix a typo, rename a variable,...) but here it's not
the case: including irq.h to hyperv.c is mandatory (to not break the
build).

"Include irq.h in hyperv.c to support the change" would do (but honestly
I don't see much value in the statement so I'd rather omit in in the
changelog).

>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  arch/x86/kvm/hyperv.c | 1 +
>  arch/x86/kvm/ioapic.h | 6 ------
>  arch/x86/kvm/irq.h    | 3 +++
>  arch/x86/kvm/lapic.h  | 2 +-
>  4 files changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c
> index 23ff65504d7e..c7d4640b7b1c 100644
> --- a/arch/x86/kvm/hyperv.c
> +++ b/arch/x86/kvm/hyperv.c
> @@ -33,6 +33,7 @@
>  #include <trace/events/kvm.h>
>  
>  #include "trace.h"
> +#include "irq.h"
>  
>  #define KVM_HV_MAX_SPARSE_VCPU_SET_BITS DIV_ROUND_UP(KVM_MAX_VCPUS, 64)
>  
> diff --git a/arch/x86/kvm/ioapic.h b/arch/x86/kvm/ioapic.h
> index ea1a4e0297da..2fb2e3c80724 100644
> --- a/arch/x86/kvm/ioapic.h
> +++ b/arch/x86/kvm/ioapic.h
> @@ -116,9 +116,6 @@ static inline int ioapic_in_kernel(struct kvm *kvm)
>  }
>  
>  void kvm_rtc_eoi_tracking_restore_one(struct kvm_vcpu *vcpu);
> -bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
> -		int short_hand, unsigned int dest, int dest_mode);
> -int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
>  void kvm_ioapic_update_eoi(struct kvm_vcpu *vcpu, int vector,
>  			int trigger_mode);
>  int kvm_ioapic_init(struct kvm *kvm);
> @@ -126,9 +123,6 @@ void kvm_ioapic_destroy(struct kvm *kvm);
>  int kvm_ioapic_set_irq(struct kvm_ioapic *ioapic, int irq, int irq_source_id,
>  		       int level, bool line_status);
>  void kvm_ioapic_clear_all(struct kvm_ioapic *ioapic, int irq_source_id);
> -int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
> -			     struct kvm_lapic_irq *irq,
> -			     struct dest_map *dest_map);
>  void kvm_get_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
>  void kvm_set_ioapic(struct kvm *kvm, struct kvm_ioapic_state *state);
>  void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu,
> diff --git a/arch/x86/kvm/irq.h b/arch/x86/kvm/irq.h
> index 7c6233d37c64..f173ab6b407e 100644
> --- a/arch/x86/kvm/irq.h
> +++ b/arch/x86/kvm/irq.h
> @@ -113,5 +113,8 @@ int apic_has_pending_timer(struct kvm_vcpu *vcpu);
>  
>  int kvm_setup_default_irq_routing(struct kvm *kvm);
>  int kvm_setup_empty_irq_routing(struct kvm *kvm);
> +int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
> +			     struct kvm_lapic_irq *irq,
> +			     struct dest_map *dest_map);
>  
>  #endif
> diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
> index 39925afdfcdc..0b9bbadd1f3c 100644
> --- a/arch/x86/kvm/lapic.h
> +++ b/arch/x86/kvm/lapic.h
> @@ -83,7 +83,7 @@ int kvm_lapic_reg_read(struct kvm_lapic *apic, u32 offset, int len,
>  		       void *data);
>  bool kvm_apic_match_dest(struct kvm_vcpu *vcpu, struct kvm_lapic *source,
>  			   int short_hand, unsigned int dest, int dest_mode);
> -
> +int kvm_apic_compare_prio(struct kvm_vcpu *vcpu1, struct kvm_vcpu *vcpu2);
>  bool __kvm_apic_update_irr(u32 *pir, void *regs, int *max_irr);
>  bool kvm_apic_update_irr(struct kvm_vcpu *vcpu, u32 *pir, int *max_irr);
>  void kvm_apic_update_ppr(struct kvm_vcpu *vcpu);

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

-- 
Vitaly

Re: [PATCH v3 3/5] KVM: X86: Use APIC_DEST_* macros properly in kvm_lapic_irq.dest_mode

[Vitaly Kuznetsov]

Peter Xu <peterx@redhat.com> writes:

> We were using either APIC_DEST_PHYSICAL|APIC_DEST_LOGICAL or 0|1 to
> fill in kvm_lapic_irq.dest_mode.  It's fine only because in most cases
> when we check against dest_mode it's against APIC_DEST_PHYSICAL (which
> equals to 0).  However, that's not consistent.  We'll have problem
> when we want to start checking against APIC_DEST_PHYSICAL

APIC_DEST_LOGICAL

> which does not equals to 1.
>
> This patch firstly introduces kvm_lapic_irq_dest_mode() helper to take
> any boolean of destination mode and return the APIC_DEST_* macro.
> Then, it replaces the 0|1 settings of irq.dest_mode with the helper.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  arch/x86/include/asm/kvm_host.h | 5 +++++
>  arch/x86/kvm/ioapic.c           | 8 +++++---
>  arch/x86/kvm/irq_comm.c         | 7 ++++---
>  arch/x86/kvm/x86.c              | 2 +-
>  4 files changed, 15 insertions(+), 7 deletions(-)
>
> diff --git a/arch/x86/include/asm/kvm_host.h b/arch/x86/include/asm/kvm_host.h
> index b79cd6aa4075..f815c97b1b57 100644
> --- a/arch/x86/include/asm/kvm_host.h
> +++ b/arch/x86/include/asm/kvm_host.h
> @@ -1022,6 +1022,11 @@ struct kvm_lapic_irq {
>  	bool msi_redir_hint;
>  };
>  
> +static inline u16 kvm_lapic_irq_dest_mode(bool dest_mode)
> +{
> +	return dest_mode ? APIC_DEST_LOGICAL : APIC_DEST_PHYSICAL;
> +}
> +
>  struct kvm_x86_ops {
>  	int (*cpu_has_kvm_support)(void);          /* __init */
>  	int (*disabled_by_bios)(void);             /* __init */
> diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
> index 9fd2dd89a1c5..901d85237d1c 100644
> --- a/arch/x86/kvm/ioapic.c
> +++ b/arch/x86/kvm/ioapic.c
> @@ -331,7 +331,8 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
>  			irq.vector = e->fields.vector;
>  			irq.delivery_mode = e->fields.delivery_mode << 8;
>  			irq.dest_id = e->fields.dest_id;
> -			irq.dest_mode = e->fields.dest_mode;
> +			irq.dest_mode =
> +			    kvm_lapic_irq_dest_mode(e->fields.dest_mode);
>  			bitmap_zero(&vcpu_bitmap, 16);
>  			kvm_bitmap_or_dest_vcpus(ioapic->kvm, &irq,
>  						 &vcpu_bitmap);
> @@ -343,7 +344,8 @@ static void ioapic_write_indirect(struct kvm_ioapic *ioapic, u32 val)
>  				 * keep ioapic_handled_vectors synchronized.
>  				 */
>  				irq.dest_id = old_dest_id;
> -				irq.dest_mode = old_dest_mode;
> +				irq.dest_mode =
> +				    kvm_lapic_irq_dest_mode(e->fields.dest_mode);
>  				kvm_bitmap_or_dest_vcpus(ioapic->kvm, &irq,
>  							 &vcpu_bitmap);
>  			}
> @@ -369,7 +371,7 @@ static int ioapic_service(struct kvm_ioapic *ioapic, int irq, bool line_status)
>  
>  	irqe.dest_id = entry->fields.dest_id;
>  	irqe.vector = entry->fields.vector;
> -	irqe.dest_mode = entry->fields.dest_mode;
> +	irqe.dest_mode = kvm_lapic_irq_dest_mode(entry->fields.dest_mode);
>  	irqe.trig_mode = entry->fields.trig_mode;
>  	irqe.delivery_mode = entry->fields.delivery_mode << 8;
>  	irqe.level = 1;
> diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
> index 8ecd48d31800..5f59e5ebdbed 100644
> --- a/arch/x86/kvm/irq_comm.c
> +++ b/arch/x86/kvm/irq_comm.c
> @@ -52,8 +52,8 @@ int kvm_irq_delivery_to_apic(struct kvm *kvm, struct kvm_lapic *src,
>  	unsigned long dest_vcpu_bitmap[BITS_TO_LONGS(KVM_MAX_VCPUS)];
>  	unsigned int dest_vcpus = 0;
>  
> -	if (irq->dest_mode == 0 && irq->dest_id == 0xff &&
> -			kvm_lowest_prio_delivery(irq)) {
> +	if (irq->dest_mode == APIC_DEST_PHYSICAL &&
> +	    irq->dest_id == 0xff && kvm_lowest_prio_delivery(irq)) {
>  		printk(KERN_INFO "kvm: apic: phys broadcast and lowest prio\n");
>  		irq->delivery_mode = APIC_DM_FIXED;
>  	}
> @@ -114,7 +114,8 @@ void kvm_set_msi_irq(struct kvm *kvm, struct kvm_kernel_irq_routing_entry *e,
>  		irq->dest_id |= MSI_ADDR_EXT_DEST_ID(e->msi.address_hi);
>  	irq->vector = (e->msi.data &
>  			MSI_DATA_VECTOR_MASK) >> MSI_DATA_VECTOR_SHIFT;
> -	irq->dest_mode = (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo;
> +	irq->dest_mode = kvm_lapic_irq_dest_mode(
> +	    (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo);

This usage is a bit fishy (I understand that it works, but),
kvm_lapic_irq_dest_mode()'s input is bool (0/1) but here we're passing
something different.

I'm not sure kvm_lapic_irq_dest_mode() is even needed here, but in case
it is I'd suggest to add '!!':

 kvm_lapic_irq_dest_mode(!!((1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo))

to make things explicit. I don't like how it looks though.

>  	irq->trig_mode = (1 << MSI_DATA_TRIGGER_SHIFT) & e->msi.data;
>  	irq->delivery_mode = e->msi.data & 0x700;
>  	irq->msi_redir_hint = ((e->msi.address_lo
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 3ed167e039e5..3b00d662dc14 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -7356,7 +7356,7 @@ static void kvm_pv_kick_cpu_op(struct kvm *kvm, unsigned long flags, int apicid)
>  	struct kvm_lapic_irq lapic_irq;
>  
>  	lapic_irq.shorthand = 0;
> -	lapic_irq.dest_mode = 0;
> +	lapic_irq.dest_mode = APIC_DEST_PHYSICAL;
>  	lapic_irq.level = 0;
>  	lapic_irq.dest_id = apicid;
>  	lapic_irq.msi_redir_hint = false;

-- 
Vitaly

Re: [PATCH v3 4/5] KVM: X86: Drop KVM_APIC_SHORT_MASK and KVM_APIC_DEST_MASK

[Vitaly Kuznetsov]

Peter Xu <peterx@redhat.com> writes:

> We have both APIC_SHORT_MASK and KVM_APIC_SHORT_MASK defined for the
> shorthand mask.  Similarly, we have both APIC_DEST_MASK and
> KVM_APIC_DEST_MASK defined for the destination mode mask.
>
> Drop the KVM_APIC_* macros and replace the only user of them to use
> the APIC_DEST_* macros instead.  At the meantime, move APIC_SHORT_MASK
> and APIC_DEST_MASK from lapic.c to lapic.h.
>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  arch/x86/kvm/lapic.c | 3 ---
>  arch/x86/kvm/lapic.h | 5 +++--
>  arch/x86/kvm/svm.c   | 4 ++--
>  3 files changed, 5 insertions(+), 7 deletions(-)
>
> diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
> index 1eabe58bb6d5..805c18178bbf 100644
> --- a/arch/x86/kvm/lapic.c
> +++ b/arch/x86/kvm/lapic.c
> @@ -56,9 +56,6 @@
>  #define APIC_VERSION			(0x14UL | ((KVM_APIC_LVT_NUM - 1) << 16))
>  #define LAPIC_MMIO_LENGTH		(1 << 12)
>  /* followed define is not in apicdef.h */
> -#define APIC_SHORT_MASK			0xc0000
> -#define APIC_DEST_NOSHORT		0x0
> -#define APIC_DEST_MASK			0x800
>  #define MAX_APIC_VECTOR			256
>  #define APIC_VECTORS_PER_REG		32
>  
> diff --git a/arch/x86/kvm/lapic.h b/arch/x86/kvm/lapic.h
> index 0b9bbadd1f3c..5a9f29ed9a4b 100644
> --- a/arch/x86/kvm/lapic.h
> +++ b/arch/x86/kvm/lapic.h
> @@ -10,8 +10,9 @@
>  #define KVM_APIC_SIPI		1
>  #define KVM_APIC_LVT_NUM	6
>  
> -#define KVM_APIC_SHORT_MASK	0xc0000
> -#define KVM_APIC_DEST_MASK	0x800
> +#define APIC_SHORT_MASK			0xc0000
> +#define APIC_DEST_NOSHORT		0x0
> +#define APIC_DEST_MASK			0x800
>  
>  #define APIC_BUS_CYCLE_NS       1
>  #define APIC_BUS_FREQUENCY      (1000000000ULL / APIC_BUS_CYCLE_NS)
> diff --git a/arch/x86/kvm/svm.c b/arch/x86/kvm/svm.c
> index 362e874297e4..65a27a7e9cb1 100644
> --- a/arch/x86/kvm/svm.c
> +++ b/arch/x86/kvm/svm.c
> @@ -4519,9 +4519,9 @@ static int avic_incomplete_ipi_interception(struct vcpu_svm *svm)
>  		 */
>  		kvm_for_each_vcpu(i, vcpu, kvm) {
>  			bool m = kvm_apic_match_dest(vcpu, apic,
> -						     icrl & KVM_APIC_SHORT_MASK,
> +						     icrl & APIC_SHORT_MASK,
>  						     GET_APIC_DEST_FIELD(icrh),
> -						     icrl & KVM_APIC_DEST_MASK);
> +						     icrl & APIC_DEST_MASK);
>  
>  			if (m && !avic_vcpu_is_running(vcpu))
>  				kvm_vcpu_wake_up(vcpu);

Personal taste but I would've preserved KVM_ prefix. The patch itself
looks correct, so

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

-- 
Vitaly

Re: [PATCH v3 5/5] KVM: X86: Fix callers of kvm_apic_match_dest() to use correct macros

[Vitaly Kuznetsov]

Peter Xu <peterx@redhat.com> writes:

> Callers of kvm_apic_match_dest() should always pass in APIC_DEST_*
> macros for either dest_mode and short_hand parameters.  Fix up all the
> callers of kvm_apic_match_dest() that are not following the rule.
>
> Reported-by: Sean Christopherson <sean.j.christopherson@intel.com>
> Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  arch/x86/kvm/ioapic.c   | 11 +++++++----
>  arch/x86/kvm/irq_comm.c |  3 ++-
>  2 files changed, 9 insertions(+), 5 deletions(-)
>
> diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
> index 901d85237d1c..1082ca8d11e5 100644
> --- a/arch/x86/kvm/ioapic.c
> +++ b/arch/x86/kvm/ioapic.c
> @@ -108,8 +108,9 @@ static void __rtc_irq_eoi_tracking_restore_one(struct kvm_vcpu *vcpu)
>  	union kvm_ioapic_redirect_entry *e;
>  
>  	e = &ioapic->redirtbl[RTC_GSI];
> -	if (!kvm_apic_match_dest(vcpu, NULL, 0,	e->fields.dest_id,
> -				e->fields.dest_mode))
> +	if (!kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> +				 e->fields.dest_id,
> +				 kvm_lapic_irq_dest_mode(e->fields.dest_mode)))
>  		return;
>  
>  	new_val = kvm_apic_pending_eoi(vcpu, e->fields.vector);
> @@ -237,6 +238,7 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
>  	struct dest_map *dest_map = &ioapic->rtc_status.dest_map;
>  	union kvm_ioapic_redirect_entry *e;
>  	int index;
> +	u16 dm;
>  
>  	spin_lock(&ioapic->lock);
>  
> @@ -250,8 +252,9 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
>  		if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG ||
>  		    kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) ||
>  		    index == RTC_GSI) {
> -			if (kvm_apic_match_dest(vcpu, NULL, 0,
> -			             e->fields.dest_id, e->fields.dest_mode) ||
> +			dm = kvm_lapic_irq_dest_mode(e->fields.dest_mode);

Nit: you could've defined 'dm' right here in the block (after '{') but
in any case I'd suggest to stick to 'dest_mode' and not shorten it to
'dm' for consistency.

> +			if (kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> +						e->fields.dest_id, dm) ||
>  			    kvm_apic_pending_eoi(vcpu, e->fields.vector))
>  				__set_bit(e->fields.vector,
>  					  ioapic_handled_vectors);
> diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
> index 5f59e5ebdbed..e89c2160b39f 100644
> --- a/arch/x86/kvm/irq_comm.c
> +++ b/arch/x86/kvm/irq_comm.c
> @@ -417,7 +417,8 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
>  
>  			kvm_set_msi_irq(vcpu->kvm, entry, &irq);
>  
> -			if (irq.level && kvm_apic_match_dest(vcpu, NULL, 0,
> +			if (irq.level &&
> +			    kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
>  						irq.dest_id, irq.dest_mode))
>  				__set_bit(irq.vector, ioapic_handled_vectors);
>  		}

Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

-- 
Vitaly

Re: [PATCH v3 3/5] KVM: X86: Use APIC_DEST_* macros properly in kvm_lapic_irq.dest_mode

[Peter Xu]

On Tue, Dec 03, 2019 at 02:16:01PM +0100, Vitaly Kuznetsov wrote:
> Peter Xu <peterx@redhat.com> writes:
> 
> > We were using either APIC_DEST_PHYSICAL|APIC_DEST_LOGICAL or 0|1 to
> > fill in kvm_lapic_irq.dest_mode.  It's fine only because in most cases
> > when we check against dest_mode it's against APIC_DEST_PHYSICAL (which
> > equals to 0).  However, that's not consistent.  We'll have problem
> > when we want to start checking against APIC_DEST_PHYSICAL
> 
> APIC_DEST_LOGICAL

Fixed.

> > +	irq->dest_mode = kvm_lapic_irq_dest_mode(
> > +	    (1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo);
> 
> This usage is a bit fishy (I understand that it works, but),
> kvm_lapic_irq_dest_mode()'s input is bool (0/1) but here we're passing
> something different.
> 
> I'm not sure kvm_lapic_irq_dest_mode() is even needed here, but in case
> it is I'd suggest to add '!!':
> 
>  kvm_lapic_irq_dest_mode(!!((1 << MSI_ADDR_DEST_MODE_SHIFT) & e->msi.address_lo))
> 
> to make things explicit. I don't like how it looks though.

IMHO it's the same (converting uint to _Bool will be the same as "!!",
also A ? B : C will be another, so we probably wrote this three times,
each of them will translate to a similar pattern of "cmpl + setne" asm
code).  But sure I can add them if you prefer.

Thanks,

-- 
Peter Xu

Re: [PATCH v3 4/5] KVM: X86: Drop KVM_APIC_SHORT_MASK and KVM_APIC_DEST_MASK

[Peter Xu]

On Tue, Dec 03, 2019 at 02:19:16PM +0100, Vitaly Kuznetsov wrote:
> > @@ -4519,9 +4519,9 @@ static int avic_incomplete_ipi_interception(struct vcpu_svm *svm)
> >  		 */
> >  		kvm_for_each_vcpu(i, vcpu, kvm) {
> >  			bool m = kvm_apic_match_dest(vcpu, apic,
> > -						     icrl & KVM_APIC_SHORT_MASK,
> > +						     icrl & APIC_SHORT_MASK,
> >  						     GET_APIC_DEST_FIELD(icrh),
> > -						     icrl & KVM_APIC_DEST_MASK);
> > +						     icrl & APIC_DEST_MASK);
> >  
> >  			if (m && !avic_vcpu_is_running(vcpu))
> >  				kvm_vcpu_wake_up(vcpu);
> 
> Personal taste but I would've preserved KVM_ prefix. The patch itself
> looks correct, so

KVM apic uses apicdefs.h a lot, so I was trying to match them (APIC_*)
with it.

> 
> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

Thanks for the reviews,

-- 
Peter Xu

Re: [PATCH v3 5/5] KVM: X86: Fix callers of kvm_apic_match_dest() to use correct macros

[Peter Xu]

On Tue, Dec 03, 2019 at 02:23:47PM +0100, Vitaly Kuznetsov wrote:
> Peter Xu <peterx@redhat.com> writes:
> 
> > Callers of kvm_apic_match_dest() should always pass in APIC_DEST_*
> > macros for either dest_mode and short_hand parameters.  Fix up all the
> > callers of kvm_apic_match_dest() that are not following the rule.
> >
> > Reported-by: Sean Christopherson <sean.j.christopherson@intel.com>
> > Reported-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> > Signed-off-by: Peter Xu <peterx@redhat.com>
> > ---
> >  arch/x86/kvm/ioapic.c   | 11 +++++++----
> >  arch/x86/kvm/irq_comm.c |  3 ++-
> >  2 files changed, 9 insertions(+), 5 deletions(-)
> >
> > diff --git a/arch/x86/kvm/ioapic.c b/arch/x86/kvm/ioapic.c
> > index 901d85237d1c..1082ca8d11e5 100644
> > --- a/arch/x86/kvm/ioapic.c
> > +++ b/arch/x86/kvm/ioapic.c
> > @@ -108,8 +108,9 @@ static void __rtc_irq_eoi_tracking_restore_one(struct kvm_vcpu *vcpu)
> >  	union kvm_ioapic_redirect_entry *e;
> >  
> >  	e = &ioapic->redirtbl[RTC_GSI];
> > -	if (!kvm_apic_match_dest(vcpu, NULL, 0,	e->fields.dest_id,
> > -				e->fields.dest_mode))
> > +	if (!kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> > +				 e->fields.dest_id,
> > +				 kvm_lapic_irq_dest_mode(e->fields.dest_mode)))
> >  		return;
> >  
> >  	new_val = kvm_apic_pending_eoi(vcpu, e->fields.vector);
> > @@ -237,6 +238,7 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
> >  	struct dest_map *dest_map = &ioapic->rtc_status.dest_map;
> >  	union kvm_ioapic_redirect_entry *e;
> >  	int index;
> > +	u16 dm;
> >  
> >  	spin_lock(&ioapic->lock);
> >  
> > @@ -250,8 +252,9 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
> >  		if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG ||
> >  		    kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) ||
> >  		    index == RTC_GSI) {
> > -			if (kvm_apic_match_dest(vcpu, NULL, 0,
> > -			             e->fields.dest_id, e->fields.dest_mode) ||
> > +			dm = kvm_lapic_irq_dest_mode(e->fields.dest_mode);
> 
> Nit: you could've defined 'dm' right here in the block (after '{') but
> in any case I'd suggest to stick to 'dest_mode' and not shorten it to
> 'dm' for consistency.
> 
> > +			if (kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> > +						e->fields.dest_id, dm) ||
> >  			    kvm_apic_pending_eoi(vcpu, e->fields.vector))
> >  				__set_bit(e->fields.vector,
> >  					  ioapic_handled_vectors);
> > diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
> > index 5f59e5ebdbed..e89c2160b39f 100644
> > --- a/arch/x86/kvm/irq_comm.c
> > +++ b/arch/x86/kvm/irq_comm.c
> > @@ -417,7 +417,8 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
> >  
> >  			kvm_set_msi_irq(vcpu->kvm, entry, &irq);
> >  
> > -			if (irq.level && kvm_apic_match_dest(vcpu, NULL, 0,
> > +			if (irq.level &&
> > +			    kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> >  						irq.dest_id, irq.dest_mode))
> >  				__set_bit(irq.vector, ioapic_handled_vectors);
> >  		}
> 
> Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>

I'll move the declaration in with your r-b.  'dm' is a silly trick of
mine to avoid the 80-char line limit.  Thanks,

-- 
Peter Xu

Re: [PATCH v3 5/5] KVM: X86: Fix callers of kvm_apic_match_dest() to use correct macros

[Sean Christopherson]

On Tue, Dec 03, 2019 at 11:27:47AM -0500, Peter Xu wrote:
> On Tue, Dec 03, 2019 at 02:23:47PM +0100, Vitaly Kuznetsov wrote:
> > > @@ -250,8 +252,9 @@ void kvm_ioapic_scan_entry(struct kvm_vcpu *vcpu, ulong *ioapic_handled_vectors)
> > >  		if (e->fields.trig_mode == IOAPIC_LEVEL_TRIG ||
> > >  		    kvm_irq_has_notifier(ioapic->kvm, KVM_IRQCHIP_IOAPIC, index) ||
> > >  		    index == RTC_GSI) {
> > > -			if (kvm_apic_match_dest(vcpu, NULL, 0,
> > > -			             e->fields.dest_id, e->fields.dest_mode) ||
> > > +			dm = kvm_lapic_irq_dest_mode(e->fields.dest_mode);
> > 
> > Nit: you could've defined 'dm' right here in the block (after '{') but
> > in any case I'd suggest to stick to 'dest_mode' and not shorten it to
> > 'dm' for consistency.
> > 
> > > +			if (kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> > > +						e->fields.dest_id, dm) ||
> > >  			    kvm_apic_pending_eoi(vcpu, e->fields.vector))
> > >  				__set_bit(e->fields.vector,
> > >  					  ioapic_handled_vectors);
> > > diff --git a/arch/x86/kvm/irq_comm.c b/arch/x86/kvm/irq_comm.c
> > > index 5f59e5ebdbed..e89c2160b39f 100644
> > > --- a/arch/x86/kvm/irq_comm.c
> > > +++ b/arch/x86/kvm/irq_comm.c
> > > @@ -417,7 +417,8 @@ void kvm_scan_ioapic_routes(struct kvm_vcpu *vcpu,
> > >  
> > >  			kvm_set_msi_irq(vcpu->kvm, entry, &irq);
> > >  
> > > -			if (irq.level && kvm_apic_match_dest(vcpu, NULL, 0,
> > > +			if (irq.level &&
> > > +			    kvm_apic_match_dest(vcpu, NULL, APIC_DEST_NOSHORT,
> > >  						irq.dest_id, irq.dest_mode))
> > >  				__set_bit(irq.vector, ioapic_handled_vectors);
> > >  		}
> > 
> > Reviewed-by: Vitaly Kuznetsov <vkuznets@redhat.com>
> 
> I'll move the declaration in with your r-b.  'dm' is a silly trick of
> mine to avoid the 80-char line limit.  Thanks,

The 80-char limit isn't an unbreakable rule, it's ok for a line to run a
few chars over when there is no better alternative.