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acrn-hypervisor
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hv: vuart: bugfix for communication vuart 

When a VM send data to its communication vuart, the vuart driver should
inject a DR interrupt to target VM and also inject a THRE interrupt to
self VM. But the original code inject the THRE interrupt to target VM,
correct it in this patch.

Tracked-On: #3423
Signed-off-by: Conghui Chen <conghui.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Conghui Chen 2019-07-15 14:22:09 +00:00 committed by ACRN System Integration
parent ecc472f9b4
commit 05acc8b705
1 changed files with 4 additions and 1 deletions
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5
hypervisor/dm/vuart.c
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@ -180,7 +180,6 @@ static void send_to_target(struct acrn_vuart *vu, uint8_t value_u8)
vuart_lock(vu);
if (vu->active) {
fifo_putchar(&vu->rxfifo, (char)value_u8);
vu->thre_int_pending = true;
vuart_toggle_intr(vu);
}
vuart_unlock(vu);
@ -349,6 +348,10 @@ static bool vuart_write(struct acrn_vm *vm, uint16_t offset_arg,
if (((vu->mcr & MCR_LOOPBACK) == 0U) &&
(offset == UART16550_THR) && (target_vu != NULL)) {
send_to_target(target_vu, value_u8);
vuart_lock(vu);
vu->thre_int_pending = true;
vuart_toggle_intr(vu);
vuart_unlock(vu);
} else {
write_reg(vu, offset, value_u8);
}