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uefi: init vlapic according to native lapic

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this patch save native lapic configuration and restore it to vm0's vlapic
before its running, then doing hpet timer interrupt injection through vlapic
interface -- this will not mess up vlapic and we can see hpet
timer interrupt coming continuously.

Signed-off-by: Jason Chen CJ <jason.cj.chen@intel.com>
This commit is contained in:
Jason Chen CJ
2018-03-20 03:49:46 +08:00
committed by lijinxia
parent 9f3c723d0a
commit d1237e81f0
7 changed files with 100 additions and 2 deletions
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25
arch/x86/guest/vlapic.c
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@@ -1608,6 +1608,31 @@ vlapic_init(struct vlapic *vlapic)
vlapic_reset(vlapic);
}
void vlapic_restore(struct vlapic *vlapic, struct lapic_regs *regs)
{
struct lapic *lapic;
int i;
lapic = vlapic->apic_page;
lapic->tpr = regs->tpr;
lapic->apr = regs->apr;
lapic->ppr = regs->ppr;
lapic->ldr = regs->ldr;
lapic->dfr = regs->dfr;
for (i = 0; i < 8; i++)
lapic->tmr[i].val = regs->tmr[i];
lapic->svr = regs->svr;
vlapic_svr_write_handler(vlapic);
lapic->lvt_timer = regs->lvtt;
lapic->lvt_lint0 = regs->lvt0;
lapic->lvt_lint1 = regs->lvt1;
lapic->lvt_error = regs->lvterr;
lapic->icr_timer = regs->ticr;
lapic->ccr_timer = regs->tccr;
lapic->dcr_timer = regs->tdcr;
}
void
vlapic_cleanup(__unused struct vlapic *vlapic)
{