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vlapic: refine IPI broadcast to support x2APIC mode

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According to SDM 10.6.1, if dest fields is 0xffU for register
ICR operation, that means the IPI is for broadcast.

According to SDM 10.12.9, 0xffffffffU of dest fields for x2APIC
means IPI is for broadcast.

We add new parameter to vlapic_calc_dest() to show whether the
dest is for broadcast. For IPI, we will set it according to
dest fields. For ioapic and MSI, we hardcode it to false because
no broadcast for ioapic and MSI.

Tracked-On: #3003
Signed-off-by: Yin Fengwei <fengwei.yin@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Yin Fengwei
2019-04-15 21:52:47 +08:00
committed by wenlingz
parent 581c0a239a
commit 578592b566
4 changed files with 18 additions and 12 deletions
Download Patch File Download Diff File Expand all files Collapse all files

18
hypervisor/arch/x86/guest/vlapic.c
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@@ -1094,14 +1094,15 @@ static inline bool is_dest_field_matched(const struct acrn_vlapic *vlapic, uint3
* addressing specified by the (dest, phys, lowprio) tuple.
*/
void
vlapic_calc_dest(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, bool phys, bool lowprio)
vlapic_calc_dest(struct acrn_vm *vm, uint64_t *dmask, bool is_broadcast,
uint32_t dest, bool phys, bool lowprio)
{
struct acrn_vlapic *vlapic, *lowprio_dest = NULL;
struct acrn_vcpu *vcpu;
uint16_t vcpu_id;
*dmask = 0UL;
if (dest == 0xffU) {
if (is_broadcast) {
/* Broadcast in both logical and physical modes. */
*dmask = vm_active_cpus(vm);
} else if (phys) {
@@ -1149,14 +1150,15 @@ vlapic_calc_dest(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, bool phys,
* @pre is_x2apic_enabled(vlapic) == true
*/
void
vlapic_calc_dest_lapic_pt(struct acrn_vm *vm, uint64_t *dmask, uint32_t dest, bool phys)
vlapic_calc_dest_lapic_pt(struct acrn_vm *vm, uint64_t *dmask, bool is_broadcast,
uint32_t dest, bool phys)
{
struct acrn_vlapic *vlapic;
struct acrn_vcpu *vcpu;
uint16_t vcpu_id;
*dmask = 0UL;
if (dest == 0xffU) {
if (is_broadcast) {
/* Broadcast in both logical and physical modes. */
*dmask = vm_active_cpus(vm);
} else if (phys) {
@@ -1227,7 +1229,7 @@ vlapic_process_init_sipi(struct acrn_vcpu* target_vcpu, uint32_t mode,
static void vlapic_icrlo_write_handler(struct acrn_vlapic *vlapic)
{
uint16_t vcpu_id;
bool phys;
bool phys = false, is_broadcast = false;
uint64_t dmask = 0UL;
uint32_t icr_low, icr_high, dest;
uint32_t vec, mode, shorthand;
@@ -1241,8 +1243,10 @@ static void vlapic_icrlo_write_handler(struct acrn_vlapic *vlapic)
icr_high = lapic->icr_hi.v;
if (is_x2apic_enabled(vlapic)) {
dest = icr_high;
is_broadcast = (dest == 0xffffffffU);
} else {
dest = icr_high >> APIC_ID_SHIFT;
is_broadcast = (dest == 0xffU);
}
vec = icr_low & APIC_VECTOR_MASK;
mode = icr_low & APIC_DELMODE_MASK;
@@ -1264,7 +1268,7 @@ static void vlapic_icrlo_write_handler(struct acrn_vlapic *vlapic)
switch (shorthand) {
case APIC_DEST_DESTFLD:
vlapic_calc_dest(vlapic->vm, &dmask, dest, phys, false);
vlapic_calc_dest(vlapic->vm, &dmask, is_broadcast, dest, phys, false);
break;
case APIC_DEST_SELF:
bitmap_set_nolock(vlapic->vcpu->vcpu_id, &dmask);
@@ -1802,7 +1806,7 @@ vlapic_receive_intr(struct acrn_vm *vm, bool level, uint32_t dest, bool phys,
* all interrupts originating from the ioapic or MSI specify the
* 'dest' in the legacy xAPIC format.
*/
vlapic_calc_dest(vm, &dmask, dest, phys, lowprio);
vlapic_calc_dest(vm, &dmask, false, dest, phys, lowprio);
for (vcpu_id = 0U; vcpu_id < vm->hw.created_vcpus; vcpu_id++) {
struct acrn_vlapic *vlapic;