From: christoffer.dall@linaro.org (Christoffer Dall)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 02/13] KVM: extend struct kvm_msi to hold a 32-bit device ID
Date: Sun, 28 Jun 2015 21:12:34 +0200 [thread overview]
Message-ID: <20150628191234.GI28244@cbox> (raw)
In-Reply-To: <1432893209-27313-3-git-send-email-andre.przywara@arm.com>
On Fri, May 29, 2015 at 10:53:18AM +0100, Andre Przywara wrote:
> The ARM GICv3 ITS MSI controller requires a device ID to be able to
> assign the proper interrupt vector. On real hardware, this ID is
> sampled from the bus. To be able to emulate an ITS controller, extend
> the KVM MSI interface to let userspace provide such a device ID. For
> PCI devices, the device ID is simply the 16-bit bus-device-function
> triplet, which should be easily available to the userland tool.
>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
> Documentation/virtual/kvm/api.txt | 8 ++++++--
> include/uapi/linux/kvm.h | 4 +++-
> 2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
> index 9fa2bf8..891d64a 100644
> --- a/Documentation/virtual/kvm/api.txt
> +++ b/Documentation/virtual/kvm/api.txt
> @@ -2121,10 +2121,14 @@ struct kvm_msi {
> __u32 address_hi;
> __u32 data;
> __u32 flags;
> - __u8 pad[16];
> + __u32 devid;
> + __u8 pad[12];
> };
>
> -No flags are defined so far. The corresponding field must be 0.
> +flags: KVM_MSI_VALID_DEVID: devid is valid, otherwise ignored.
I don't see what the 'otherwise ignored' part of the sentence here is
meant to say, that the flags field is otherwise ignored for other value?
That's not what the current API doc specifies, it specifies that the
remainder of the field must be 0.
> +devid: If KVM_MSI_VALID_DEVID is set, contains a value to identify the device
> + that wrote the MSI message. For PCI, this is usually a BFD
> + identifier in the lower 16 bits.
I assume plus something else that uniquely identifies the PCI
controller?
-Christoffer
>
>
> 4.71 KVM_CREATE_PIT2
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 4b60056..2a23705 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -965,12 +965,14 @@ struct kvm_one_reg {
> __u64 addr;
> };
>
> +#define KVM_MSI_VALID_DEVID (1U << 0)
> struct kvm_msi {
> __u32 address_lo;
> __u32 address_hi;
> __u32 data;
> __u32 flags;
> - __u8 pad[16];
> + __u32 devid;
> + __u8 pad[12];
> };
>
> struct kvm_arm_device_addr {
> --
> 2.3.5
>
WARNING: multiple messages have this Message-ID (diff)
From: Christoffer Dall <christoffer.dall@linaro.org>
To: Andre Przywara <andre.przywara@arm.com>
Cc: marc.zyngier@arm.com, kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org
Subject: Re: [PATCH 02/13] KVM: extend struct kvm_msi to hold a 32-bit device ID
Date: Sun, 28 Jun 2015 21:12:34 +0200 [thread overview]
Message-ID: <20150628191234.GI28244@cbox> (raw)
In-Reply-To: <1432893209-27313-3-git-send-email-andre.przywara@arm.com>
On Fri, May 29, 2015 at 10:53:18AM +0100, Andre Przywara wrote:
> The ARM GICv3 ITS MSI controller requires a device ID to be able to
> assign the proper interrupt vector. On real hardware, this ID is
> sampled from the bus. To be able to emulate an ITS controller, extend
> the KVM MSI interface to let userspace provide such a device ID. For
> PCI devices, the device ID is simply the 16-bit bus-device-function
> triplet, which should be easily available to the userland tool.
>
> Signed-off-by: Andre Przywara <andre.przywara@arm.com>
> ---
> Documentation/virtual/kvm/api.txt | 8 ++++++--
> include/uapi/linux/kvm.h | 4 +++-
> 2 files changed, 9 insertions(+), 3 deletions(-)
>
> diff --git a/Documentation/virtual/kvm/api.txt b/Documentation/virtual/kvm/api.txt
> index 9fa2bf8..891d64a 100644
> --- a/Documentation/virtual/kvm/api.txt
> +++ b/Documentation/virtual/kvm/api.txt
> @@ -2121,10 +2121,14 @@ struct kvm_msi {
> __u32 address_hi;
> __u32 data;
> __u32 flags;
> - __u8 pad[16];
> + __u32 devid;
> + __u8 pad[12];
> };
>
> -No flags are defined so far. The corresponding field must be 0.
> +flags: KVM_MSI_VALID_DEVID: devid is valid, otherwise ignored.
I don't see what the 'otherwise ignored' part of the sentence here is
meant to say, that the flags field is otherwise ignored for other value?
That's not what the current API doc specifies, it specifies that the
remainder of the field must be 0.
> +devid: If KVM_MSI_VALID_DEVID is set, contains a value to identify the device
> + that wrote the MSI message. For PCI, this is usually a BFD
> + identifier in the lower 16 bits.
I assume plus something else that uniquely identifies the PCI
controller?
-Christoffer
>
>
> 4.71 KVM_CREATE_PIT2
> diff --git a/include/uapi/linux/kvm.h b/include/uapi/linux/kvm.h
> index 4b60056..2a23705 100644
> --- a/include/uapi/linux/kvm.h
> +++ b/include/uapi/linux/kvm.h
> @@ -965,12 +965,14 @@ struct kvm_one_reg {
> __u64 addr;
> };
>
> +#define KVM_MSI_VALID_DEVID (1U << 0)
> struct kvm_msi {
> __u32 address_lo;
> __u32 address_hi;
> __u32 data;
> __u32 flags;
> - __u8 pad[16];
> + __u32 devid;
> + __u8 pad[12];
> };
>
> struct kvm_arm_device_addr {
> --
> 2.3.5
>
next prev parent reply other threads:[~2015-06-28 19:12 UTC|newest]
Thread overview: 104+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-05-29 9:53 [PATCH 00/13] arm64: KVM: GICv3 ITS emulation Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-05-29 9:53 ` [PATCH 01/13] KVM: arm/arm64: VGIC: don't track used LRs in the distributor Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-12 17:23 ` Eric Auger
2015-05-29 9:53 ` [PATCH 02/13] KVM: extend struct kvm_msi to hold a 32-bit device ID Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-09 8:49 ` Eric Auger
2015-06-09 8:49 ` Eric Auger
2015-06-28 19:12 ` Christoffer Dall [this message]
2015-06-28 19:12 ` Christoffer Dall
2015-06-29 14:53 ` Andre Przywara
2015-06-29 14:53 ` Andre Przywara
2015-06-29 15:02 ` Christoffer Dall
2015-06-29 15:02 ` Christoffer Dall
2015-05-29 9:53 ` [PATCH 03/13] KVM: arm/arm64: add emulation model specific destroy function Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-09 8:51 ` Eric Auger
2015-06-09 8:51 ` Eric Auger
2015-06-28 19:14 ` Christoffer Dall
2015-06-28 19:14 ` Christoffer Dall
2015-05-29 9:53 ` [PATCH 04/13] KVM: arm64: Introduce new MMIO region for the ITS base address Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-09 8:52 ` Eric Auger
2015-06-09 8:52 ` Eric Auger
2015-06-11 15:12 ` Andre Przywara
2015-06-11 15:12 ` Andre Przywara
2015-05-29 9:53 ` [PATCH 05/13] KVM: arm64: handle ITS related GICv3 redistributor registers Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-09 8:52 ` Eric Auger
2015-06-09 8:52 ` Eric Auger
2015-06-12 17:03 ` Andre Przywara
2015-06-12 17:03 ` Andre Przywara
2015-05-29 9:53 ` [PATCH 06/13] KVM: arm64: introduce ITS emulation file with stub functions Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-09 9:23 ` Eric Auger
2015-06-09 9:23 ` Eric Auger
2015-05-29 9:53 ` [PATCH 07/13] KVM: arm64: implement basic ITS register handlers Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-09 13:34 ` Eric Auger
2015-06-09 13:34 ` Eric Auger
2015-06-28 19:36 ` Christoffer Dall
2015-06-28 19:36 ` Christoffer Dall
2015-05-29 9:53 ` [PATCH 08/13] KVM: arm64: add data structures to model ITS interrupt translation Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-09 15:59 ` Eric Auger
2015-06-09 15:59 ` Eric Auger
2015-05-29 9:53 ` [PATCH 09/13] KVM: arm64: handle pending bit for LPIs in ITS emulation Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-09 15:59 ` Eric Auger
2015-06-09 15:59 ` Eric Auger
2015-06-11 15:46 ` Andre Przywara
2015-06-11 15:46 ` Andre Przywara
2015-06-11 16:01 ` Marc Zyngier
2015-06-11 16:01 ` Marc Zyngier
2015-06-11 18:24 ` Eric Auger
2015-06-11 18:24 ` Eric Auger
2015-05-29 9:53 ` [PATCH 10/13] KVM: arm64: sync LPI properties and status between guest and KVM Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-11 17:44 ` Eric Auger
2015-06-11 17:44 ` Eric Auger
2015-06-28 19:33 ` Christoffer Dall
2015-06-28 19:33 ` Christoffer Dall
2015-05-29 9:53 ` [PATCH 11/13] KVM: arm64: implement ITS command queue command handlers Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-12 15:28 ` Eric Auger
2015-06-12 15:28 ` Eric Auger
2015-06-28 19:41 ` Christoffer Dall
2015-06-28 19:41 ` Christoffer Dall
2015-07-03 15:57 ` Andre Przywara
2015-07-03 15:57 ` Andre Przywara
2015-07-03 21:01 ` Christoffer Dall
2015-07-03 21:01 ` Christoffer Dall
2015-05-29 9:53 ` [PATCH 12/13] KVM: arm64: implement MSI injection in ITS emulation Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-11 17:43 ` Eric Auger
2015-06-11 17:43 ` Eric Auger
2015-07-06 16:46 ` Andre Przywara
2015-07-06 16:46 ` Andre Przywara
2015-07-07 8:13 ` Christoffer Dall
2015-07-07 8:13 ` Christoffer Dall
2015-05-29 9:53 ` [PATCH 13/13] KVM: arm64: enable ITS emulation as a virtual MSI controller Andre Przywara
2015-05-29 9:53 ` Andre Przywara
2015-06-12 16:05 ` Eric Auger
2015-06-12 16:05 ` Eric Auger
2015-06-18 8:43 ` Eric Auger
2015-06-18 8:43 ` Eric Auger
2015-06-18 14:22 ` Andre Przywara
2015-06-18 14:22 ` Andre Przywara
2015-06-18 15:03 ` Pavel Fedin
2015-06-18 15:03 ` Pavel Fedin
2015-06-18 19:20 ` Andre Przywara
2015-06-18 19:20 ` Andre Przywara
2015-06-08 6:53 ` [PATCH 00/13] arm64: KVM: GICv3 ITS emulation Pavel Fedin
2015-06-08 6:53 ` Pavel Fedin
2015-06-08 8:23 ` Marc Zyngier
2015-06-08 8:23 ` Marc Zyngier
2015-06-08 10:54 ` Pavel Fedin
2015-06-08 10:54 ` Pavel Fedin
2015-06-08 17:13 ` Marc Zyngier
2015-06-08 17:13 ` Marc Zyngier
2015-06-09 8:12 ` Eric Auger
2015-06-09 8:12 ` Eric Auger
2015-06-10 12:18 ` Pavel Fedin
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