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688a41c290
Instead of "#include <x86/foo.h>", use "#include <asm/foo.h>". In other words, we are adopting the same practice in Linux kernel. Tracked-On: #5920 Signed-off-by: Liang Yi <yi.liang@intel.com> Reviewed-by: Jason Chen CJ <jason.cj.chen@intel.com>
43 lines
1.4 KiB
C
43 lines
1.4 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <asm/irq.h>
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#include <asm/vmx.h>
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void handle_nmi(__unused struct intr_excp_ctx *ctx)
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{
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uint32_t value32;
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/*
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* There is a window where we may miss the current request in this
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* notification period when the work flow is as the following:
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*
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* CPUx + + CPUr
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* | |
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* | +--+
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* | | | Handle pending req
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* | <--+
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* +--+ |
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* | | Set req flag |
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* <--+ |
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* +------------------>---+
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* | Send NMI | | Handle NMI
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* | <--+
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* | |
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* | |
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* | +--> vCPU enter
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* | |
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* + +
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*
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* So, here we enable the NMI-window exiting to trigger the next vmexit
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* once there is no "virtual-NMI blocking" after vCPU enter into VMX non-root
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* mode. Then we can process the pending request on time.
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*/
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value32 = exec_vmread32(VMX_PROC_VM_EXEC_CONTROLS);
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value32 |= VMX_PROCBASED_CTLS_NMI_WINEXIT;
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exec_vmwrite32(VMX_PROC_VM_EXEC_CONTROLS, value32);
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}
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