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[PATCH v6 28/42] nvme: verify validity of prp lists in the cmb
From: |
Klaus Jensen |
Subject: |
[PATCH v6 28/42] nvme: verify validity of prp lists in the cmb |
Date: |
Mon, 16 Mar 2020 07:29:14 -0700 |
From: Klaus Jensen <address@hidden>
Before this patch the device already supported this, but it did not
check for the validity of it nor announced the support in the LISTS
field.
If some of the PRPs in a PRP list are in the CMB, then ALL entries must
be there. This patch makes sure that is verified as well as properly
announcing support for PRP lists in the CMB.
Signed-off-by: Klaus Jensen <address@hidden>
---
hw/block/nvme.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)
diff --git a/hw/block/nvme.c b/hw/block/nvme.c
index 850087aac967..eecfad694bf8 100644
--- a/hw/block/nvme.c
+++ b/hw/block/nvme.c
@@ -210,6 +210,7 @@ static uint16_t nvme_map_prp(NvmeCtrl *n, QEMUSGList *qsg,
QEMUIOVector *iov,
trans_len = MIN(len, trans_len);
int num_prps = (len >> n->page_bits) + 1;
uint16_t status;
+ bool prp_list_in_cmb = false;
trace_nvme_dev_map_prp(nvme_cid(req), trans_len, len, prp1, prp2,
num_prps);
@@ -237,11 +238,16 @@ static uint16_t nvme_map_prp(NvmeCtrl *n, QEMUSGList
*qsg, QEMUIOVector *iov,
status = NVME_INVALID_FIELD | NVME_DNR;
goto unmap;
}
+
if (len > n->page_size) {
uint64_t prp_list[n->max_prp_ents];
uint32_t nents, prp_trans;
int i = 0;
+ if (nvme_addr_is_cmb(n, prp2)) {
+ prp_list_in_cmb = true;
+ }
+
nents = (len + n->page_size - 1) >> n->page_bits;
prp_trans = MIN(n->max_prp_ents, nents) * sizeof(uint64_t);
nvme_addr_read(n, prp2, (void *)prp_list, prp_trans);
@@ -255,6 +261,11 @@ static uint16_t nvme_map_prp(NvmeCtrl *n, QEMUSGList *qsg,
QEMUIOVector *iov,
goto unmap;
}
+ if (prp_list_in_cmb != nvme_addr_is_cmb(n, prp_ent)) {
+ status = NVME_INVALID_USE_OF_CMB | NVME_DNR;
+ goto unmap;
+ }
+
i = 0;
nents = (len + n->page_size - 1) >> n->page_bits;
prp_trans = MIN(n->max_prp_ents, nents) * sizeof(uint64_t);
@@ -274,6 +285,7 @@ static uint16_t nvme_map_prp(NvmeCtrl *n, QEMUSGList *qsg,
QEMUIOVector *iov,
if (status) {
goto unmap;
}
+
len -= trans_len;
i++;
}
@@ -1931,7 +1943,7 @@ static void nvme_init_cmb(NvmeCtrl *n, PCIDevice *pci_dev)
NVME_CMBSZ_SET_SQS(n->bar.cmbsz, 1);
NVME_CMBSZ_SET_CQS(n->bar.cmbsz, 0);
- NVME_CMBSZ_SET_LISTS(n->bar.cmbsz, 0);
+ NVME_CMBSZ_SET_LISTS(n->bar.cmbsz, 1);
NVME_CMBSZ_SET_RDS(n->bar.cmbsz, 1);
NVME_CMBSZ_SET_WDS(n->bar.cmbsz, 1);
NVME_CMBSZ_SET_SZU(n->bar.cmbsz, 2);
--
2.25.1
[PATCH v6 27/42] nvme: add request mapping helper, Klaus Jensen, 2020/03/16
[PATCH v6 28/42] nvme: verify validity of prp lists in the cmb,
Klaus Jensen <=
[PATCH v6 34/42] pci: pass along the return value of dma_memory_rw, Klaus Jensen, 2020/03/16
[PATCH v6 30/42] nvme: add check for mdts, Klaus Jensen, 2020/03/16
[PATCH v6 26/42] nvme: pass request along for tracing, Klaus Jensen, 2020/03/16
[PATCH v6 33/42] nvme: use preallocated qsg/iov in nvme_dma_prp, Klaus Jensen, 2020/03/16
[PATCH v6 31/42] nvme: add check for prinfo, Klaus Jensen, 2020/03/16