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Re: [Qemu-devel] [PATCH 4/4] hw/virtio: fix Power Management Control Reg
From: |
Michael S. Tsirkin |
Subject: |
Re: [Qemu-devel] [PATCH 4/4] hw/virtio: fix Power Management Control Register for PCI Express virtio devices |
Date: |
Tue, 10 Jan 2017 05:07:58 +0200 |
On Wed, Jan 04, 2017 at 09:57:18PM +0200, Marcel Apfelbaum wrote:
> Make Power Management State flag writable to conform
> with the PCI Express spec.
>
> Signed-off-by: Marcel Apfelbaum <address@hidden>
Same comment as previously.
> ---
> hw/virtio/virtio-pci.c | 5 +++++
> include/hw/pci/pcie.h | 2 ++
> 2 files changed, 7 insertions(+)
>
> diff --git a/hw/virtio/virtio-pci.c b/hw/virtio/virtio-pci.c
> index 66a5bf3..7a98078 100644
> --- a/hw/virtio/virtio-pci.c
> +++ b/hw/virtio/virtio-pci.c
> @@ -1796,12 +1796,15 @@ static void virtio_pci_realize(PCIDevice *pci_dev,
> Error **errp)
>
> pos = pci_add_capability(pci_dev, PCI_CAP_ID_PM, 0, PCI_PM_SIZEOF);
> assert(pos > 0);
> + pci_dev->exp.pm_cap = pos;
>
> /*
> * Indicates that this function complies with revision 1.2 of the
> * PCI Power Management Interface Specification.
> */
> pci_set_word(pci_dev->config + pos + PCI_PM_PMC, 0x3);
> + pci_set_word(pci_dev->wmask + pos + PCI_PM_CTRL,
> + PCI_PM_CTRL_STATE_MASK);
> /* Init error enabling flags */
> pcie_cap_deverr_init(pci_dev);
> /* Init Link Control Register */
> @@ -1846,6 +1849,8 @@ static void virtio_pci_reset(DeviceState *qdev)
> if (pci_is_express(dev)) {
> pcie_cap_deverr_reset(dev);
> pcie_cap_lnkctl_reset(dev);
> +
> + pci_set_word(dev->config + dev->exp.pm_cap + PCI_PM_CTRL, 0);
> }
> }
>
> diff --git a/include/hw/pci/pcie.h b/include/hw/pci/pcie.h
> index 7d6611a..7c9c573 100644
> --- a/include/hw/pci/pcie.h
> +++ b/include/hw/pci/pcie.h
> @@ -63,6 +63,8 @@ typedef enum {
> struct PCIExpressDevice {
> /* Offset of express capability in config space */
> uint8_t exp_cap;
> + /* Offset of Power Management capability in config space */
> + uint8_t pm_cap;
>
> /* SLOT */
> bool hpev_notified; /* Logical AND of conditions for hot plug event.
> --
> 2.5.5