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Re: [PATCH V6 24/24] xen/ioreq: Make the IOREQ feature selectable on Arm

Hi Oleksandr,

On 29/01/2021 01:48, Oleksandr Tyshchenko wrote:
From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>

The purpose of this patch is to add a possibility for user
to be able to select IOREQ support on Arm (which is disabled
by default) with retaining the current behaviour on x86
(is selected by HVM and it's prompt is not visible).

Also make the IOREQ be depended on CONFIG_EXPERT on Arm since
it is considered as Technological Preview feature.

Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>

Please note, this is a split/cleanup/hardening of Julien's PoC:
"Add support for Guest IO forwarding to a device emulator"

Changes V5 -> V6:
    - new patch
  xen/common/Kconfig | 8 +++++++-
  1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/xen/common/Kconfig b/xen/common/Kconfig
index fa049a6..225e57b 100644
--- a/xen/common/Kconfig
+++ b/xen/common/Kconfig
@@ -137,7 +137,13 @@ config HYPFS_CONFIG
          want to hide the .config contents from dom0.
-       bool
+       bool "IOREQ support (EXPERT)" if EXPERT && !X86
+       default X86
+       depends on HVM
AFAICT, CONFIG_HVM will already select CONFIG_IOREQ_SERVER. So are the two lines necessary?


Julien Grall



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