From c21ee04f11ae068aa132cce56d09f618d4a66259 Mon Sep 17 00:00:00 2001 From: Cédric Le Goater Date: Fri, 5 Nov 2021 11:26:34 +0100 Subject: powerpc/xive: Add a kernel parameter for StoreEOI MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit StoreEOI is activated by default on platforms supporting the feature (POWER10) and will be used as soon as firmware advertises its availability. The kernel parameter provides a way to deactivate its use. It can be still be reactivated through debugfs. Signed-off-by: Cédric Le Goater Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20211105102636.1016378-10-clg@kaod.org --- Documentation/admin-guide/kernel-parameters.txt | 6 ++++++ 1 file changed, 6 insertions(+) (limited to 'Documentation') diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt index 2711ddb4835a..6248a061788a 100644 --- a/Documentation/admin-guide/kernel-parameters.txt +++ b/Documentation/admin-guide/kernel-parameters.txt @@ -6446,6 +6446,12 @@ controller on both pseries and powernv platforms. Only useful on POWER9 and above. + xive.store-eoi=off [PPC] + By default on POWER10 and above, the kernel will use + stores for EOI handling when the XIVE interrupt mode + is active. This option allows the XIVE driver to use + loads instead, as on POWER9. + xhci-hcd.quirks [USB,KNL] A hex value specifying bitmask with supplemental xhci host controller quirks. Meaning of each bit can be -- cgit v1.2.3