From: Paul Durrant <xadimgnik@gmail.com>
To: "'Oleksandr Tyshchenko'" <olekstysh@gmail.com>,
<xen-devel@lists.xenproject.org>
Cc: 'Stefano Stabellini' <sstabellini@kernel.org>,
'Julien Grall' <julien@xen.org>, 'Wei Liu' <wl@xen.org>,
'Andrew Cooper' <andrew.cooper3@citrix.com>,
'Ian Jackson' <ian.jackson@eu.citrix.com>,
'George Dunlap' <george.dunlap@citrix.com>,
'Oleksandr Tyshchenko' <oleksandr_tyshchenko@epam.com>,
'Julien Grall' <julien.grall@arm.com>,
'Jan Beulich' <jbeulich@suse.com>,
'Daniel De Graaf' <dgdegra@tycho.nsa.gov>,
'Volodymyr Babchuk' <Volodymyr_Babchuk@epam.com>
Subject: RE: [RFC PATCH V1 04/12] xen/arm: Introduce arch specific bits for IOREQ/DM features
Date: Tue, 4 Aug 2020 08:49:06 +0100 [thread overview]
Message-ID: <001101d66a33$bba44670$32ecd350$@xen.org> (raw)
In-Reply-To: <1596478888-23030-5-git-send-email-olekstysh@gmail.com>
> -----Original Message-----
> From: Xen-devel <xen-devel-bounces@lists.xenproject.org> On Behalf Of Oleksandr Tyshchenko
> Sent: 03 August 2020 19:21
> To: xen-devel@lists.xenproject.org
> Cc: Stefano Stabellini <sstabellini@kernel.org>; Julien Grall <julien@xen.org>; Wei Liu <wl@xen.org>;
> Andrew Cooper <andrew.cooper3@citrix.com>; Ian Jackson <ian.jackson@eu.citrix.com>; George Dunlap
> <george.dunlap@citrix.com>; Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>; Julien Grall
> <julien.grall@arm.com>; Jan Beulich <jbeulich@suse.com>; Daniel De Graaf <dgdegra@tycho.nsa.gov>;
> Volodymyr Babchuk <Volodymyr_Babchuk@epam.com>
> Subject: [RFC PATCH V1 04/12] xen/arm: Introduce arch specific bits for IOREQ/DM features
>
> From: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
>
> This patch makes possible to forward Guest MMIO accesses
> to a device emulator on Arm and enables that support for
> Arm64.
>
> Also update XSM code a bit to let DM op be used on Arm.
> New arch DM op will be introduced in the follow-up patch.
>
> Please note, at the moment build on Arm32 is broken
> (see cmpxchg usage in hvm_send_buffered_ioreq()) if someone
> wants to enable CONFIG_IOREQ_SERVER due to the lack of
> cmpxchg_64 support on Arm32.
>
> Please note, this is a split/cleanup of Julien's PoC:
> "Add support for Guest IO forwarding to a device emulator"
>
> Signed-off-by: Julien Grall <julien.grall@arm.com>
> Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@epam.com>
> ---
> tools/libxc/xc_dom_arm.c | 25 +++++++---
> xen/arch/arm/Kconfig | 1 +
> xen/arch/arm/Makefile | 2 +
> xen/arch/arm/dm.c | 34 +++++++++++++
> xen/arch/arm/domain.c | 9 ++++
> xen/arch/arm/hvm.c | 46 +++++++++++++++++-
> xen/arch/arm/io.c | 67 +++++++++++++++++++++++++-
> xen/arch/arm/ioreq.c | 86 +++++++++++++++++++++++++++++++++
> xen/arch/arm/traps.c | 17 +++++++
> xen/common/memory.c | 5 +-
> xen/include/asm-arm/domain.h | 80 +++++++++++++++++++++++++++++++
> xen/include/asm-arm/hvm/ioreq.h | 103 ++++++++++++++++++++++++++++++++++++++++
> xen/include/asm-arm/mmio.h | 1 +
> xen/include/asm-arm/p2m.h | 7 +--
> xen/include/xsm/dummy.h | 4 +-
> xen/include/xsm/xsm.h | 6 +--
> xen/xsm/dummy.c | 2 +-
> xen/xsm/flask/hooks.c | 5 +-
> 18 files changed, 476 insertions(+), 24 deletions(-)
> create mode 100644 xen/arch/arm/dm.c
> create mode 100644 xen/arch/arm/ioreq.c
> create mode 100644 xen/include/asm-arm/hvm/ioreq.h
>
> diff --git a/tools/libxc/xc_dom_arm.c b/tools/libxc/xc_dom_arm.c
> index 931404c..b5fc066 100644
> --- a/tools/libxc/xc_dom_arm.c
> +++ b/tools/libxc/xc_dom_arm.c
> @@ -26,11 +26,19 @@
> #include "xg_private.h"
> #include "xc_dom.h"
>
> -#define NR_MAGIC_PAGES 4
> +
> #define CONSOLE_PFN_OFFSET 0
> #define XENSTORE_PFN_OFFSET 1
> #define MEMACCESS_PFN_OFFSET 2
> #define VUART_PFN_OFFSET 3
> +#define IOREQ_SERVER_PFN_OFFSET 4
> +
> +#define NR_IOREQ_SERVER_PAGES 8
> +#define NR_MAGIC_PAGES (4 + NR_IOREQ_SERVER_PAGES)
> +
> +#define GUEST_MAGIC_BASE_PFN (GUEST_MAGIC_BASE >> XC_PAGE_SHIFT)
> +
> +#define special_pfn(x) (GUEST_MAGIC_BASE_PFN + (x))
Why introduce 'magic pages' for Arm? It's quite a horrible hack that we have begun to do away with by adding resource mapping.
Paul
next prev parent reply other threads:[~2020-08-04 7:49 UTC|newest]
Thread overview: 140+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-08-03 18:21 [RFC PATCH V1 00/12] IOREQ feature (+ virtio-mmio) on Arm Oleksandr Tyshchenko
2020-08-03 18:21 ` [RFC PATCH V1 01/12] hvm/ioreq: Make x86's IOREQ feature common Oleksandr Tyshchenko
2020-08-04 7:45 ` Paul Durrant
2020-08-04 11:10 ` Oleksandr
2020-08-04 11:23 ` Paul Durrant
2020-08-04 11:51 ` Oleksandr
2020-08-04 13:18 ` Paul Durrant
2020-08-04 13:52 ` Julien Grall
2020-08-04 15:41 ` Jan Beulich
2020-08-04 19:11 ` Stefano Stabellini
2020-08-05 7:01 ` Jan Beulich
2020-08-06 0:37 ` Stefano Stabellini
2020-08-06 6:59 ` Jan Beulich
2020-08-06 20:32 ` Stefano Stabellini
2020-08-07 13:19 ` Oleksandr
2020-08-07 16:45 ` Oleksandr
2020-08-07 21:50 ` Stefano Stabellini
2020-08-07 22:19 ` Oleksandr
2020-08-10 13:41 ` Oleksandr
2020-08-10 23:34 ` Stefano Stabellini
2020-08-11 9:19 ` Julien Grall
2020-08-11 10:10 ` Oleksandr
2020-08-11 22:47 ` Stefano Stabellini
2020-08-12 14:35 ` Oleksandr
2020-08-12 23:08 ` Stefano Stabellini
2020-08-13 20:16 ` Julien Grall
2020-08-07 23:45 ` Oleksandr
2020-08-10 23:34 ` Stefano Stabellini
2020-08-05 8:33 ` Julien Grall
2020-08-06 0:37 ` Stefano Stabellini
2020-08-06 9:45 ` Julien Grall
2020-08-06 23:48 ` Stefano Stabellini
2020-08-10 19:20 ` Julien Grall
2020-08-10 23:34 ` Stefano Stabellini
2020-08-11 11:28 ` Julien Grall
2020-08-11 22:48 ` Stefano Stabellini
2020-08-12 8:19 ` Julien Grall
2020-08-20 19:14 ` Oleksandr
2020-08-21 0:53 ` Stefano Stabellini
2020-08-21 18:54 ` Julien Grall
2020-08-05 13:30 ` Julien Grall
2020-08-06 11:37 ` Oleksandr
2020-08-10 16:29 ` Julien Grall
2020-08-10 17:28 ` Oleksandr
2020-08-05 16:15 ` Andrew Cooper
2020-08-06 8:20 ` Oleksandr
2020-08-15 17:30 ` Julien Grall
2020-08-16 19:37 ` Oleksandr
2020-08-03 18:21 ` [RFC PATCH V1 02/12] hvm/dm: Make x86's DM " Oleksandr Tyshchenko
2020-08-03 18:21 ` [RFC PATCH V1 03/12] xen/mm: Make x86's XENMEM_resource_ioreq_server handling common Oleksandr Tyshchenko
2020-08-03 18:21 ` [RFC PATCH V1 04/12] xen/arm: Introduce arch specific bits for IOREQ/DM features Oleksandr Tyshchenko
2020-08-04 7:49 ` Paul Durrant [this message]
2020-08-04 14:01 ` Julien Grall
2020-08-04 23:22 ` Stefano Stabellini
2020-08-15 17:56 ` Julien Grall
2020-08-17 14:36 ` Oleksandr
2020-08-04 23:22 ` Stefano Stabellini
2020-08-05 7:05 ` Jan Beulich
2020-08-05 16:41 ` Stefano Stabellini
2020-08-05 19:45 ` Oleksandr
2020-08-05 9:32 ` Julien Grall
2020-08-05 15:41 ` Oleksandr
2020-08-06 10:19 ` Julien Grall
2020-08-10 18:09 ` Oleksandr
2020-08-10 18:21 ` Oleksandr
2020-08-10 19:00 ` Julien Grall
2020-08-10 20:29 ` Oleksandr
2020-08-10 22:37 ` Julien Grall
2020-08-11 6:13 ` Oleksandr
2020-08-12 15:08 ` Oleksandr
2020-08-11 17:09 ` Oleksandr
2020-08-11 17:50 ` Julien Grall
2020-08-13 18:41 ` Oleksandr
2020-08-13 20:36 ` Julien Grall
2020-08-13 21:49 ` Oleksandr
2020-08-13 20:39 ` Oleksandr Tyshchenko
2020-08-13 22:14 ` Julien Grall
2020-08-14 12:08 ` Oleksandr
2020-08-05 14:12 ` Julien Grall
2020-08-05 14:45 ` Jan Beulich
2020-08-05 19:30 ` Oleksandr
2020-08-06 11:08 ` Julien Grall
2020-08-06 11:29 ` Jan Beulich
2020-08-20 18:30 ` Oleksandr
2020-08-21 6:16 ` Jan Beulich
2020-08-21 11:13 ` Oleksandr
2020-08-06 13:27 ` Oleksandr
2020-08-10 18:25 ` Julien Grall
2020-08-10 19:58 ` Oleksandr
2020-08-05 16:13 ` Jan Beulich
2020-08-05 19:47 ` Oleksandr
2020-08-03 18:21 ` [RFC PATCH V1 05/12] hvm/dm: Introduce xendevicemodel_set_irq_level DM op Oleksandr Tyshchenko
2020-08-04 23:22 ` Stefano Stabellini
2020-08-05 9:39 ` Julien Grall
2020-08-06 0:37 ` Stefano Stabellini
2020-08-06 11:32 ` Julien Grall
2020-08-06 23:49 ` Stefano Stabellini
2020-08-07 8:43 ` Jan Beulich
2020-08-07 21:50 ` Stefano Stabellini
2020-08-08 9:27 ` Julien Grall
2020-08-08 9:28 ` Julien Grall
2020-08-10 23:34 ` Stefano Stabellini
2020-08-11 13:04 ` Julien Grall
2020-08-11 22:48 ` Stefano Stabellini
2020-08-18 9:31 ` Julien Grall
2020-08-21 0:53 ` Stefano Stabellini
2020-08-17 15:23 ` Jan Beulich
2020-08-17 22:56 ` Stefano Stabellini
2020-08-18 8:03 ` Jan Beulich
2020-08-05 16:15 ` Jan Beulich
2020-08-05 22:12 ` Oleksandr
2020-08-03 18:21 ` [RFC PATCH V1 06/12] libxl: Introduce basic virtio-mmio support on Arm Oleksandr Tyshchenko
2020-08-03 18:21 ` [RFC PATCH V1 07/12] A collection of tweaks to be able to run emulator in driver domain Oleksandr Tyshchenko
2020-08-05 16:19 ` Jan Beulich
2020-08-05 16:40 ` Paul Durrant
2020-08-06 9:22 ` Oleksandr
2020-08-06 9:27 ` Jan Beulich
2020-08-14 16:30 ` Oleksandr
2020-08-16 15:36 ` Julien Grall
2020-08-17 15:07 ` Oleksandr
2020-08-03 18:21 ` [RFC PATCH V1 08/12] xen/arm: Invalidate qemu mapcache on XENMEM_decrease_reservation Oleksandr Tyshchenko
2020-08-05 16:21 ` Jan Beulich
2020-08-06 11:35 ` Julien Grall
2020-08-06 11:50 ` Jan Beulich
2020-08-06 14:28 ` Oleksandr
2020-08-06 16:33 ` Jan Beulich
2020-08-06 16:57 ` Oleksandr
2020-08-03 18:21 ` [RFC PATCH V1 09/12] libxl: Handle virtio-mmio irq in more correct way Oleksandr Tyshchenko
2020-08-04 23:22 ` Stefano Stabellini
2020-08-05 20:51 ` Oleksandr
2020-08-03 18:21 ` [RFC PATCH V1 10/12] libxl: Add support for virtio-disk configuration Oleksandr Tyshchenko
2020-08-04 23:23 ` Stefano Stabellini
2020-08-05 21:12 ` Oleksandr
2020-08-06 0:37 ` Stefano Stabellini
2020-08-03 18:21 ` [RFC PATCH V1 11/12] libxl: Insert "dma-coherent" property into virtio-mmio device node Oleksandr Tyshchenko
2020-08-04 23:23 ` Stefano Stabellini
2020-08-05 20:35 ` Oleksandr
2020-08-03 18:21 ` [RFC PATCH V1 12/12] libxl: Fix duplicate memory node in DT Oleksandr Tyshchenko
2020-08-15 17:24 ` [RFC PATCH V1 00/12] IOREQ feature (+ virtio-mmio) on Arm Julien Grall
2020-08-16 19:34 ` Oleksandr
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