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hv: support asyncio request

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Current IO emulation is synchronous. The user VM need to wait for the
completion of the the I/O request before return. But Virtio Spec
introduces introduces asynchronous IO with a new register in MMIO/PIO
space named NOTIFY, to be used for FE driver to notify BE driver, ACRN
hypervisor can emulate this register by sending a notification to vCPU
in Service VM side. This way, FE side can resume to work without waiting
for the full completion of BE side response.

Tracked-On: #8209
Signed-off-by: Conghui <conghui.chen@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Conghui
2022-08-17 09:58:23 +08:00
committed by acrnsi-robot
parent 9cf9606e56
commit 12bfa98a37
8 changed files with 31 additions and 5 deletions
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4
hypervisor/debug/sbuf.c
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@@ -17,7 +17,7 @@
int32_t sbuf_share_setup(uint16_t pcpu_id, uint32_t sbuf_id, uint64_t *hva)
{
if ((pcpu_id >= get_pcpu_nums()) || (sbuf_id >= ACRN_SBUF_ID_MAX)) {
if ((pcpu_id >= get_pcpu_nums()) || (sbuf_id >= ACRN_SBUF_PER_PCPU_ID_MAX)) {
return -EINVAL;
}
@@ -33,7 +33,7 @@ void sbuf_reset(void)
uint16_t pcpu_id, sbuf_id;
for (pcpu_id = 0U; pcpu_id < get_pcpu_nums(); pcpu_id++) {
for (sbuf_id = 0U; sbuf_id < ACRN_SBUF_ID_MAX; sbuf_id++) {
for (sbuf_id = 0U; sbuf_id < ACRN_SBUF_PER_PCPU_ID_MAX; sbuf_id++) {
per_cpu(sbuf, pcpu_id)[sbuf_id] = 0U;
}
}