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hw/nvme: fix endianness issue for shadow doorbells 

In commit 2fda0726e5 ("hw/nvme: fix missing endian conversions for
doorbell buffers"), we fixed shadow doorbells for big-endian guests
running on little endian hosts. But I did not fix little-endian guests
on big-endian hosts. Fix this.

Resolves: https://gitlab.com/qemu-project/qemu/-/issues/1765
Fixes: 3f7fe8de3d ("hw/nvme: Implement shadow doorbell buffer support")
Cc: qemu-stable@nongnu.org
Reported-by: Thomas Huth <thuth@redhat.com>
Tested-by: Cédric Le Goater <clg@redhat.com>
Tested-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Keith Busch <kbusch@kernel.org>
Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Signed-off-by: Klaus Jensen <k.jensen@samsung.com>
This commit is contained in:
Klaus Jensen 2023-07-18 11:44:17 +02:00
parent 361d539735
commit ea3c76f149
1 changed files with 13 additions and 5 deletions
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18
hw/nvme/ctrl.c
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@ -6801,6 +6801,7 @@ static uint16_t nvme_dbbuf_config(NvmeCtrl *n, const NvmeRequest *req)
PCIDevice *pci = PCI_DEVICE(n);
uint64_t dbs_addr = le64_to_cpu(req->cmd.dptr.prp1);
uint64_t eis_addr = le64_to_cpu(req->cmd.dptr.prp2);
uint32_t v;
int i;
/* Address should be page aligned */
@ -6818,6 +6819,8 @@ static uint16_t nvme_dbbuf_config(NvmeCtrl *n, const NvmeRequest *req)
NvmeCQueue *cq = n->cq[i];
if (sq) {
v = cpu_to_le32(sq->tail);
/*
* CAP.DSTRD is 0, so offset of ith sq db_addr is (i<<3)
* nvme_process_db() uses this hard-coded way to calculate
@ -6825,7 +6828,7 @@ static uint16_t nvme_dbbuf_config(NvmeCtrl *n, const NvmeRequest *req)
*/
sq->db_addr = dbs_addr + (i << 3);
sq->ei_addr = eis_addr + (i << 3);
pci_dma_write(pci, sq->db_addr, &sq->tail, sizeof(sq->tail));
pci_dma_write(pci, sq->db_addr, &v, sizeof(sq->tail));
if (n->params.ioeventfd && sq->sqid != 0) {
if (!nvme_init_sq_ioeventfd(sq)) {
@ -6835,10 +6838,12 @@ static uint16_t nvme_dbbuf_config(NvmeCtrl *n, const NvmeRequest *req)
}
if (cq) {
v = cpu_to_le32(cq->head);
/* CAP.DSTRD is 0, so offset of ith cq db_addr is (i<<3)+(1<<2) */
cq->db_addr = dbs_addr + (i << 3) + (1 << 2);
cq->ei_addr = eis_addr + (i << 3) + (1 << 2);
pci_dma_write(pci, cq->db_addr, &cq->head, sizeof(cq->head));
pci_dma_write(pci, cq->db_addr, &v, sizeof(cq->head));
if (n->params.ioeventfd && cq->cqid != 0) {
if (!nvme_init_cq_ioeventfd(cq)) {
@ -7587,7 +7592,7 @@ static uint64_t nvme_mmio_read(void *opaque, hwaddr addr, unsigned size)
static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val)
{
PCIDevice *pci = PCI_DEVICE(n);
uint32_t qid;
uint32_t qid, v;
if (unlikely(addr & ((1 << 2) - 1))) {
NVME_GUEST_ERR(pci_nvme_ub_db_wr_misaligned,
@ -7654,7 +7659,8 @@ static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val)
start_sqs = nvme_cq_full(cq) ? 1 : 0;
cq->head = new_head;
if (!qid && n->dbbuf_enabled) {
pci_dma_write(pci, cq->db_addr, &cq->head, sizeof(cq->head));
v = cpu_to_le32(cq->head);
pci_dma_write(pci, cq->db_addr, &v, sizeof(cq->head));
}
if (start_sqs) {
NvmeSQueue *sq;
@ -7714,6 +7720,8 @@ static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val)
sq->tail = new_tail;
if (!qid && n->dbbuf_enabled) {
v = cpu_to_le32(sq->tail);
/*
* The spec states "the host shall also update the controller's
* corresponding doorbell property to match the value of that entry
@ -7727,7 +7735,7 @@ static void nvme_process_db(NvmeCtrl *n, hwaddr addr, int val)
* including ones that run on Linux, are not updating Admin Queues,
* so we can't trust reading it for an appropriate sq tail.
*/
pci_dma_write(pci, sq->db_addr, &sq->tail, sizeof(sq->tail));
pci_dma_write(pci, sq->db_addr, &v, sizeof(sq->tail));
}
qemu_bh_schedule(sq->bh);