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hv: enable SMAP in hypervisor

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With SMAP enabled, hypervisor can't access pages that
owned by guest(either SOS or UOS), and an override is
is provided: stac()/clac() to enable/disable access to
guest's memory pages.

 Pre-conditon:
    Mark hypervisor owned pages as supervisor mode (U/S = 0),
       and set all othter memory pages as user mode (U/S = 1).

Tracked-On: #2056
Signed-off-by: Yonghua Huang <yonghua.huang@intel.com>
Acked-by: Anthony Xu <anthony.xu@intel.com>
This commit is contained in:
Yonghua Huang
2018-12-13 16:55:11 +08:00
committed by wenlingz
parent 57dfc7de05
commit 4fc5dcfc3e
22 changed files with 157 additions and 41 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
hypervisor/dm/vpci/msix.c
View File

@@ -70,11 +70,13 @@ static int32_t vmsix_remap_entry(struct pci_vdev *vdev, uint32_t index, bool ena
* fields with a single QWORD write, but some hardware can accept 32 bits
* write only
*/
stac();
mmio_write32((uint32_t)(info.pmsi_addr), (void *)&(pentry->addr));
mmio_write32((uint32_t)(info.pmsi_addr >> 32U), (void *)((char *)&(pentry->addr) + 4U));
mmio_write32(info.pmsi_data, (void *)&(pentry->data));
mmio_write32(vdev->msix.tables[index].vector_control, (void *)&(pentry->vector_control));
clac();
}
return ret;
@@ -278,6 +280,7 @@ static int32_t vmsix_table_mmio_access_handler(struct io_request *io_req, void *
return -EINVAL;
}
stac();
/* MSI-X PBA and Capability Table could be in the same range */
if (mmio->direction == REQUEST_READ) {
/* mmio->size is either 4U or 8U */
@@ -294,6 +297,7 @@ static int32_t vmsix_table_mmio_access_handler(struct io_request *io_req, void *
mmio_write64(mmio->value, (void *)hva);
}
}
clac();
}
return 0;