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ioreq: only clear vcpu->req when io request needed

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Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
This commit is contained in:
Jason Chen CJ
2018-03-21 21:15:38 +08:00
committed by Jack Ren
parent 42fa9b2602
commit 4839f780e4
2 changed files with 3 additions and 4 deletions
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3
hypervisor/arch/x86/io.c
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@@ -103,8 +103,6 @@ int io_instr_handler(struct vcpu *vcpu)
direction = VM_EXIT_IO_INSTRUCTION_ACCESS_DIRECTION(exit_qual);
mask = 0xfffffffful >> (32 - 8 * sz);
memset(&vcpu->req, 0, sizeof(struct vhm_request));
TRACE_4I(TRC_VMEXIT_IO_INSTRUCTION, port, direction, sz,
cur_context_idx);
@@ -149,6 +147,7 @@ int io_instr_handler(struct vcpu *vcpu)
if (status != 0) {
uint64_t *rax = &cur_context->guest_cpu_regs.regs.rax;
memset(&vcpu->req, 0, sizeof(struct vhm_request));
dm_emulate_pio_pre(vcpu, exit_qual, sz, *rax);
status = acrn_insert_request_wait(vcpu, &vcpu->req);
}