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hv: vpci: refine comment for pci_vdev_update_vbar_base 

Refine why we set the base_gpa to zero for a vBAR.

Tracked-On: #3475
Signed-off-by: Li Fei1 <fei1.li@intel.com>
This commit is contained in:
Li Fei1 2020-04-07 14:41:43 +08:00 committed by wenlingz
parent 572f755037
commit 2d66d39529
1 changed files with 2 additions and 3 deletions
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5
hypervisor/dm/vpci/vdev.c
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@ -137,10 +137,9 @@ static void pci_vdev_update_vbar_base(struct pci_vdev *vdev, uint32_t idx)
} }
if ((base != 0UL) && !ept_is_mr_valid(vpci2vm(vdev->vpci), base, vdev->vbars[idx].size)) { if ((base != 0UL) && !ept_is_mr_valid(vpci2vm(vdev->vpci), base, vdev->vbars[idx].size)) {
pr_fatal("%s, %x:%x.%x set invalid bar[%d] base: 0x%lx, size: 0x%lx\n", __func__, pr_warn("%s, %x:%x.%x set invalid bar[%d] base: 0x%lx, size: 0x%lx\n", __func__,
vdev->bdf.bits.b, vdev->bdf.bits.d, vdev->bdf.bits.f, idx, base, vdev->vbars[idx].size); vdev->bdf.bits.b, vdev->bdf.bits.d, vdev->bdf.bits.f, idx, base, vdev->vbars[idx].size);
/* If guest set a invalid GPA, ignore it temporarily */ base = 0UL; /* 0UL means invalid GPA, so that EPT won't map */
base = 0UL;
} }
vdev->vbars[idx].base_gpa = base; vdev->vbars[idx].base_gpa = base;