[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: [RFC PATCH 5/5] xen/privcmd: add IOCTL_PRIVCMD_GSI_FROM_IRQ
- To: Huang Rui <ray.huang@xxxxxxx>
- From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Date: Wed, 15 Mar 2023 15:26:17 +0100
- Arc-authentication-results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none
- Arc-message-signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=P8Ln+wRfhrINjyA6imnJhPYRQ4u9OKDbnJqG04xkOiQ=; b=YPM87aSrq1bETSWxeniwjt2SEhboXh9/GGIfxFn3IKP7z4U36C53pBwOCcfIR9J6onPmRhbvzGl1oyQEFo6lvnQlUoyD1Nt0hzcgsyGptl5SpQGCxiLgq6t0+VrV4faj+DkzMlrdZQ55jWHzvQggqGoGZL49kCwrEgldX73eWmISvfz1R9m6MtaaboItmcKIvK4SI1jdlS/xMLNxu6k9ux8nMc/CzHCM9RcUR+G9gSVNjBODKYRLrQ8Prceod9UO0L1MpoGcktaW2e0FAyG/wpVYxGI6B68St/mGaqhedLmSB0FXOYQI2mDRxKS746ZVShaCSc9jcPDaifah2bTU2w==
- Arc-seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=A553x65u8wykC4HFnZ6lRzqBSb7gBu9Y2AFLco26gSbof+fKT+2J8kEAKPLQkt9dddgPsxjNMkhq968oFwM4P25HTN/U6Ne8C08WZGg3sOwYmpEZMgYUuoBDX8qKzFo2ZGJa60D9ChM1jgqK2dZpw9j2Ztp3kF/8vCDdd+jhLeCZWTtImYSKllR3ttmjagI2JHQehbqaoPZpDH7DhcdohpfrVHm4lUgg6EGONaNREv7y/mtLuo7LbbK4/Fd0naA2XumXyIArFq6MhN0OwV7tc9gYLLit3VPgPEd7GpXLLY5Y6r/VnSojpDKJopNs3pGJM1LGEXldTp9Heq7sIPezsw==
- Authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=citrix.com;
- Cc: Juergen Gross <jgross@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>, Boris Ostrovsky <boris.ostrovsky@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, linux-kernel@xxxxxxxxxxxxxxx, dri-devel@xxxxxxxxxxxxxxxxxxxxx, amd-gfx@xxxxxxxxxxxxxxxxxxxxx, Alex Deucher <alexander.deucher@xxxxxxx>, Christian König <christian.koenig@xxxxxxx>, Stewart Hildebrand <Stewart.Hildebrand@xxxxxxx>, Xenia Ragiadakou <burzalodowa@xxxxxxxxx>, Honglei Huang <honglei1.huang@xxxxxxx>, Julia Zhang <julia.zhang@xxxxxxx>, Chen Jiqian <Jiqian.Chen@xxxxxxx>
- Delivery-date: Wed, 15 Mar 2023 14:26:41 +0000
- Ironport-data: A9a23:FSuMA6hkoJHLmbrR62vZfR1mX1615xAKZh0ujC45NGQN5FlHY01je htvDD+GPfbfYmXzfY92b9vkpBwAu5eDzdNqT1Y9pS9gFSsb9cadCdqndUqhZCn6wu8v7q5Ex 55HNoSfdpBcolv0/ErF3m3J9CEkvU2wbuOgTrWCYmYpHlUMpB4J0XpLg/Q+jpNjne+3CgaMv cKai8DEMRqu1iUc3lg8sspvkzsy+qWi0N8klgZmP6sT5waDzyB94K83fsldEVOpGuG4IcbiL wrz5OnR1n/U+R4rFuSknt7TGqHdauePVeQmoiM+t5mK2nCulARrukoIHKN0hXNsoyeIh7hMJ OBl7vRcf+uL0prkw4zxWzEAe8130DYvFLXveRBTuuTLp6HKnueFL1yDwyjaMKVBktubD12i+ tQWOSwhNg+nit6owbn4WvlD2+UJApnCadZ3VnFIlVk1DN4AaLWbGeDgw4Yd2z09wMdTAfzZe swVLyJ1awjNaAFOPVFRD48imOCvhT/0dDgwRFC9/PJrpTSMilEoluSwWDbWUoXiqcF9hEGXq 3iA523kKhobKMae2XyO9XfEaurnxHuiA91JSeDmnhJsqFqaykgPFUwRaWe6j8KH1HCxS9ROM VNBr0LCqoB3riRHVOLVRRSp5n6ZtxgTc9NVH6sx7wTl4qjb+QGCHUAfUyVMLtchsaceXic23 1WEm9foAz1Hs7CPT3+ZsLCOoluaPiwYLnQLYyMeehcU+NnooIw1jRXnQ85qFei+ididMTv32 TGR6i8lm68Uk9UIxo2851nMhz/qrZ/MJiYl6wOSUm+74wdRYI++e5fu+VXd9exHLouSUh+Gp ndss8yf6v0eSJKAjiqARM0TE7yzofWIKjvRhRhoBZZJ3zi3+juvcJ5d5Bl6JVx1KYAKYzLkb ELIuh9W/NlUJnTCRaZyb8e+BdQCyan7Cc+jWOrZY9ZDeZttcxfB+zthDWaZ2239mU4gnLt5N ZqGesahF14TDKghxz2zL88W0aUq3Tw/zGWVRpf2yRWo+bObaDieTrJtGGCSY/8w9r/CgATR/ 9tVLcKMxz1WVeG4aS7SmaYZMEoYJHw8CZfpouRYc+eCJkxtH2RJI//Wx7wldo082aRIn+HH1 ni4VglTz1+XrX/aLQSDLGJjYbXgdZ96oTQwOilEFXSpwnkqZ8CE7KoZX5Iycf8s8+kL8BJvZ /wMesHFCPIWTD3Co24ZdcOl8NEkcwm3jwWTOSbjeCI4Y5NrWw3O/JnjYxfr8y4NSCGwsKPSv oGd6+8SerJbLywKMSocQKvHI4+Z1ZTFpN9PYg==
- Ironport-hdrordr: A9a23:tpCXe6lS4hXiihABYl8qh/vlo4TpDfIE3DAbv31ZSRFFG/GwvM ql9c5rriMcRgxhIU3I+OrwQJVoJEm3yXcb2/h1AV7PZniFhILsFvAA0WKA+Vzd8k/Fh4pgPM 5bGsAUNDSzNzhHZK3BkW6F+rgbsb+6GWOT6ds2DU0BceinUc5dBs5CZDqmLg==
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On Sun, Mar 12, 2023 at 08:01:57PM +0800, Huang Rui wrote:
> From: Chen Jiqian <Jiqian.Chen@xxxxxxx>
>
> When hypervisor get an interrupt, it needs interrupt's
> gsi number instead of irq number. Gsi number is unique
> in xen, but irq number is only unique in one domain.
> So, we need to record the relationship between irq and
> gsi when dom0 initialized pci devices, and provide syscall
> IOCTL_PRIVCMD_GSI_FROM_IRQ to translate irq to gsi. So
> that, we can map pirq successfully in hypervisor side.
GSI is not only unique in Xen, it's an ACPI provided value that's
unique in the platform. The text above make it look like GSI is some
kind of internal Xen reference to an interrupt, but it's not.
How does a PV domain deal with this? I would assume there Linux will
also end up with IRQ != GSI, and hence will need some kind of
translation?
Thanks, Roger.
|
