Re: [Qemu-devel] [RFC][PATCH 01/16] msi: Generalize msix_supported to msi_supported

["Michael S. Tsirkin" <mst@redhat.com>]

On Sat, Dec 03, 2011 at 12:17:26PM +0100, Jan Kiszka wrote:
> From: Jan Kiszka <jan.kiszka@siemens.com>
> 
> Rename msix_supported to msi_supported and control MSI and MSI-X
> activation this way. That was likely to original intention for this
> flag, but MSI support came after MSI-X.
> 
> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>

Acked-by: Michael S. Tsirkin <mst@redhat.com>

This patch should go into qemu.git, right?

> ---
>  hw/msi.c  |    8 ++++++++
>  hw/msi.h  |    2 ++
>  hw/msix.c |    9 ++++-----
>  hw/msix.h |    2 --
>  hw/pc.c   |    4 ++--
>  5 files changed, 16 insertions(+), 9 deletions(-)
> 
> diff --git a/hw/msi.c b/hw/msi.c
> index f214fcf..5d6ceb6 100644
> --- a/hw/msi.c
> +++ b/hw/msi.c
> @@ -36,6 +36,9 @@
>  
>  #define PCI_MSI_VECTORS_MAX     32
>  
> +/* Flag for interrupt controller to declare MSI/MSI-X support */
> +bool msi_supported;
> +
>  /* If we get rid of cap allocator, we won't need this. */
>  static inline uint8_t msi_cap_sizeof(uint16_t flags)
>  {
> @@ -116,6 +119,11 @@ int msi_init(struct PCIDevice *dev, uint8_t offset,
>      uint16_t flags;
>      uint8_t cap_size;
>      int config_offset;
> +
> +    if (!msi_supported) {
> +        return -ENOTSUP;
> +    }
> +
>      MSI_DEV_PRINTF(dev,
>                     "init offset: 0x%"PRIx8" vector: %"PRId8
>                     " 64bit %d mask %d\n",
> diff --git a/hw/msi.h b/hw/msi.h
> index 5766018..3040bb0 100644
> --- a/hw/msi.h
> +++ b/hw/msi.h
> @@ -24,6 +24,8 @@
>  #include "qemu-common.h"
>  #include "pci.h"
>  
> +extern bool msi_supported;
> +
>  bool msi_enabled(const PCIDevice *dev);
>  int msi_init(struct PCIDevice *dev, uint8_t offset,
>               unsigned int nr_vectors, bool msi64bit, bool msi_per_vector_mask);
> diff --git a/hw/msix.c b/hw/msix.c
> index b15bafc..8850fbd 100644
> --- a/hw/msix.c
> +++ b/hw/msix.c
> @@ -12,6 +12,7 @@
>   */
>  
>  #include "hw.h"
> +#include "msi.h"
>  #include "msix.h"
>  #include "pci.h"
>  #include "range.h"
> @@ -32,9 +33,6 @@
>  #define MSIX_MAX_ENTRIES 32
>  
>  
> -/* Flag for interrupt controller to declare MSI-X support */
> -int msix_supported;
> -
>  /* Add MSI-X capability to the config space for the device. */
>  /* Given a bar and its size, add MSI-X table on top of it
>   * and fill MSI-X capability in the config space.
> @@ -212,10 +210,11 @@ int msix_init(struct PCIDevice *dev, unsigned short nentries,
>                unsigned bar_nr, unsigned bar_size)
>  {
>      int ret;
> +
>      /* Nothing to do if MSI is not supported by interrupt controller */
> -    if (!msix_supported)
> +    if (!msi_supported) {
>          return -ENOTSUP;
> -
> +    }
>      if (nentries > MSIX_MAX_ENTRIES)
>          return -EINVAL;
>  
> diff --git a/hw/msix.h b/hw/msix.h
> index 7e04336..5aba22b 100644
> --- a/hw/msix.h
> +++ b/hw/msix.h
> @@ -29,6 +29,4 @@ void msix_notify(PCIDevice *dev, unsigned vector);
>  
>  void msix_reset(PCIDevice *dev);
>  
> -extern int msix_supported;
> -
>  #endif
> diff --git a/hw/pc.c b/hw/pc.c
> index 9328ee5..5225d5b 100644
> --- a/hw/pc.c
> +++ b/hw/pc.c
> @@ -36,7 +36,7 @@
>  #include "elf.h"
>  #include "multiboot.h"
>  #include "mc146818rtc.h"
> -#include "msix.h"
> +#include "msi.h"
>  #include "sysbus.h"
>  #include "sysemu.h"
>  #include "blockdev.h"
> @@ -896,7 +896,7 @@ static DeviceState *apic_init(void *env, uint8_t apic_id)
>          apic_mapped = 1;
>      }
>  
> -    msix_supported = 1;
> +    msi_supported = true;
>  
>      return dev;
>  }
> -- 
> 1.7.3.4