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HV: Install a NMI handler in acrn IDT

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This patch installs a NMI handler in acrn IDT to handle
NMIs out of dispatch_exception.

Tracked-On: #3886
Acked-by: Eddie Dong <eddie.dong@intel.com>
Signed-off-by: Kaige Fu <kaige.fu@intel.com>
This commit is contained in:
Kaige Fu 2019-12-11 15:16:35 +00:00 committed by wenlingz
parent fb346a6c11
commit 525d4d3cd0
3 changed files with 33 additions and 3 deletions
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19
hypervisor/arch/x86/idt.S
View File

@ -110,9 +110,9 @@ excp_debug:
.align 8 .align 8
excp_nmi: excp_nmi:
pushq $0x0 /* pseudo error code */
pushq $0x2
jmp nmi_save_frame
.align 8 .align 8
excp_breakpoint: excp_breakpoint:
@ -330,6 +330,19 @@ excp_rsvd:
iretq iretq
/*
* Common entry point for NMI interrupts
*/
.align 8
nmi_save_frame:
save_frame
call handle_nmi
restore_frame
iretq
/* /*
* Common entry point for defined interrupts. * Common entry point for defined interrupts.

8
hypervisor/arch/x86/irq.c
View File

@ -382,6 +382,14 @@ void dispatch_exception(struct intr_excp_ctx *ctx)
cpu_dead(); cpu_dead();
} }
void handle_nmi(__unused struct intr_excp_ctx *ctx)
{
/*
* Just ignore the NMI here for now.
* TODO: implement specific NMI handling function.
*/
}
static void init_irq_descs(void) static void init_irq_descs(void)
{ {
uint32_t i; uint32_t i;

9
hypervisor/include/arch/x86/irq.h
View File

@ -302,6 +302,15 @@ uint32_t irq_to_vector(uint32_t irq);
*/ */
void dispatch_interrupt(const struct intr_excp_ctx *ctx); void dispatch_interrupt(const struct intr_excp_ctx *ctx);
/**
* @brief Handle NMI
*
* To handle an NMI
*
* @param ctx Pointer to interrupt exception context
*/
void handle_nmi(__unused struct intr_excp_ctx *ctx);
/** /**
* @brief Initialize interrupt * @brief Initialize interrupt
* *