From 75c3c9de961db9a76842452c973aea921eb4fa1f Mon Sep 17 00:00:00 2001 From: Klaus Jensen Date: Fri, 18 Dec 2020 13:04:19 +0100 Subject: hw/block/nvme: disable PMR at boot up The PMR should not be enabled at boot up. Disable the PMR MemoryRegion initially and implement MMIO for PMRCTL, allowing the host to enable the PMR explicitly. Reviewed-by: Keith Busch Signed-off-by: Klaus Jensen --- hw/block/nvme.c | 14 ++++++++++++-- 1 file changed, 12 insertions(+), 2 deletions(-) diff --git a/hw/block/nvme.c b/hw/block/nvme.c index f8dd771925..d773796051 100644 --- a/hw/block/nvme.c +++ b/hw/block/nvme.c @@ -3848,8 +3848,16 @@ static void nvme_write_bar(NvmeCtrl *n, hwaddr offset, uint64_t data, NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrcap_readonly, "invalid write to PMRCAP register, ignored"); return; - case 0xE04: /* TODO PMRCTL */ - break; + case 0xE04: /* PMRCTL */ + n->bar.pmrctl = data; + if (NVME_PMRCTL_EN(data)) { + memory_region_set_enabled(&n->pmrdev->mr, true); + n->bar.pmrsts = 0; + } else { + memory_region_set_enabled(&n->pmrdev->mr, false); + NVME_PMRSTS_SET_NRDY(n->bar.pmrsts, 1); + } + return; case 0xE08: /* PMRSTS */ NVME_GUEST_ERR(pci_nvme_ub_mmiowr_pmrsts_readonly, "invalid write to PMRSTS register, ignored"); @@ -4225,6 +4233,8 @@ static void nvme_init_pmr(NvmeCtrl *n, PCIDevice *pci_dev) PCI_BASE_ADDRESS_SPACE_MEMORY | PCI_BASE_ADDRESS_MEM_TYPE_64 | PCI_BASE_ADDRESS_MEM_PREFETCH, &n->pmrdev->mr); + + memory_region_set_enabled(&n->pmrdev->mr, false); } static int nvme_init_pci(NvmeCtrl *n, PCIDevice *pci_dev, Error **errp) -- cgit v1.2.3-55-g7522