From: andre.przywara@arm.com (Andre Przywara)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 02/13] KVM: extend struct kvm_msi to hold a 32-bit device ID
Date: Fri, 29 May 2015 10:53:18 +0100 [thread overview]
Message-ID: <1432893209-27313-3-git-send-email-andre.przywara@arm.com> (raw)
In-Reply-To: <1432893209-27313-1-git-send-email-andre.przywara@arm.com>
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.
+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.
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: Andre Przywara <andre.przywara@arm.com>
To: christoffer.dall@linaro.org, marc.zyngier@arm.com
Cc: kvmarm@lists.cs.columbia.edu,
linux-arm-kernel@lists.infradead.org, kvm@vger.kernel.org
Subject: [PATCH 02/13] KVM: extend struct kvm_msi to hold a 32-bit device ID
Date: Fri, 29 May 2015 10:53:18 +0100 [thread overview]
Message-ID: <1432893209-27313-3-git-send-email-andre.przywara@arm.com> (raw)
In-Reply-To: <1432893209-27313-1-git-send-email-andre.przywara@arm.com>
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.
+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.
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:[~2015-05-29 9:53 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 ` Andre Przywara [this message]
2015-05-29 9:53 ` [PATCH 02/13] KVM: extend struct kvm_msi to hold a 32-bit device ID Andre Przywara
2015-06-09 8:49 ` Eric Auger
2015-06-09 8:49 ` Eric Auger
2015-06-28 19:12 ` Christoffer Dall
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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