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dkim=pass header.d=suse.com header.s=susede1 header.b=MJBVpMHq DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.com; s=susede1; t=1751443994; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=LGW/gk3WVxXGF0g4wh7ZDjVSEfCjF8UjuqgxFwW7rBU=; b=MJBVpMHqpu8cKkaJ8YCM1wr0ucHaY7HYgMgsIa83rTqGBYW/FoUvfFctqetwUWONP3pjkk bv+HZOy5FbEORdnda8SPjQo2MMDc2RCX5TyGk9HYCDjXzfZmbYZIEi3diq412+wMu+lOE8 ADwLeEvdfTYG0kH7/q94Awh/lQ6phOs= From: Juergen Gross To: minios-devel@lists.xenproject.org, xen-devel@lists.xenproject.org Cc: samuel.thibault@ens-lyon.org, Juergen Gross Subject: [MINI-OS PATCH 03/19] mini-os: grants: support populated grant table at boot Date: Wed, 2 Jul 2025 10:12:38 +0200 Message-ID: <20250702081254.14383-4-jgross@suse.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250702081254.14383-1-jgross@suse.com> References: <20250702081254.14383-1-jgross@suse.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Rspamd-Server: rspamd2.dmz-prg2.suse.org X-Rspamd-Queue-Id: 7222921189 X-Rspamd-Action: no action X-Spam-Flag: NO X-Spamd-Result: default: False [-3.01 / 50.00]; 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charset="utf-8" When kexec-ing into a new kernel, the grant table might still have active grants. Support that by not adding populated grant entries to the list of free grant entries. Signed-off-by: Juergen Gross Reviewed-by: Jason Andryuk --- gnttab.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/gnttab.c b/gnttab.c index 8168ed5d..5b04ab01 100644 --- a/gnttab.c +++ b/gnttab.c @@ -183,11 +183,13 @@ init_gnttab(void) #ifdef GNT_DEBUG memset(inuse, 1, sizeof(inuse)); #endif - for (i =3D NR_RESERVED_ENTRIES; i < NR_GRANT_ENTRIES; i++) - put_free_entry(i); =20 gnttab_table =3D arch_init_gnttab(NR_GRANT_FRAMES); printk("gnttab_table mapped at %p.\n", gnttab_table); + + for (i =3D NR_RESERVED_ENTRIES; i < NR_GRANT_ENTRIES; i++) + if (gnttab_table[i].flags =3D=3D 0) + put_free_entry(i); } =20 void --=20 2.43.0