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[Qemu-devel] [PATCH v3 3/4] apic: Add helper functions apic_match_dest,
From: |
James Sullivan |
Subject: |
[Qemu-devel] [PATCH v3 3/4] apic: Add helper functions apic_match_dest, apic_match_[physical, logical]_dest |
Date: |
Thu, 30 Apr 2015 15:49:15 -0600 |
Added three helper functions apic_match_dest(),
apic_match_physical_dest(), and apic_match_logical_dest() which can be
used to determine if a logical or physical APIC ID match a given LAPIC
under a given dest_mode. This does not account for shorthand.
Signed-off-by: James Sullivan <address@hidden>
---
hw/intc/apic.c | 26 ++++++++++++++++++++++++++
1 file changed, 26 insertions(+)
diff --git a/hw/intc/apic.c b/hw/intc/apic.c
index a25efa1..9dd27b2 100644
--- a/hw/intc/apic.c
+++ b/hw/intc/apic.c
@@ -224,6 +224,32 @@ static int apic_compare_prio(struct APICCommonState *cpu1,
return apic_get_arb_pri(cpu1) - apic_get_arb_pri(cpu2);
}
+static bool apic_match_physical_dest(struct APICCommonState *apic, uint8_t
dest)
+{
+ return (dest == 0xff || apic->id == dest);
+}
+
+static bool apic_match_logical_dest(struct APICCommonState *apic, uint8_t dest)
+{
+ if (apic->dest_mode == 0xf) {
+ return (dest & apic->log_dest) > 0;
+ } else if (apic->dest_mode == 0) {
+ return ((dest & 0xf0) == (apic->log_dest & 0xf0)) &&
+ (dest & apic->log_dest & 0x0f) > 0;
+ }
+ return false;
+}
+
+static bool apic_match_dest(struct APICCommonState *apic, uint8_t dest_mode,
+ uint8_t dest)
+{
+ if (dest_mode == 0) {
+ return apic_match_physical_dest(apic, dest);
+ } else {
+ return apic_match_logical_dest(apic, dest);
+ }
+}
+
static void apic_bus_deliver(const uint32_t *deliver_bitmask,
uint8_t delivery_mode, uint8_t vector_num,
uint8_t trigger_mode)
--
2.3.5