[PATCH v5 13/13] xen: allow up to 16383 cpus

From: Juergen Gross <jgross@suse.com>
To: xen-devel@lists.xenproject.org
Cc: Juergen Gross <jgross@suse.com>,
	Andrew Cooper <andrew.cooper3@citrix.com>,
	George Dunlap <george.dunlap@citrix.com>,
	Jan Beulich <jbeulich@suse.com>, Julien Grall <julien@xen.org>,
	Stefano Stabellini <sstabellini@kernel.org>, Wei Liu <wl@xen.org>
Subject: [PATCH v5 13/13] xen: allow up to 16383 cpus
Date: Thu, 14 Mar 2024 08:20:29 +0100	[thread overview]
Message-ID: <20240314072029.16937-14-jgross@suse.com> (raw)
In-Reply-To: <20240314072029.16937-1-jgross@suse.com>

With lock handling now allowing up to 16384 cpus (spinlocks can handle
65535 cpus, rwlocks can handle 16384 cpus), raise the allowed limit for
the number of cpus to be configured to 16383.

The new limit is imposed by IOMMU_CMD_BUFFER_MAX_ENTRIES and
QINVAL_MAX_ENTRY_NR required to be larger than 2 * CONFIG_NR_CPUS.

Signed-off-by: Juergen Gross <jgross@suse.com>
---
V5:
- new patch (Jan Beulich)
---
 xen/arch/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/xen/arch/Kconfig b/xen/arch/Kconfig
index 67ba38f32f..308ce129a8 100644
--- a/xen/arch/Kconfig
+++ b/xen/arch/Kconfig
@@ -6,7 +6,7 @@ config PHYS_ADDR_T_32
 
 config NR_CPUS
 	int "Maximum number of CPUs"
-	range 1 4095
+	range 1 16383
 	default "256" if X86
 	default "8" if ARM && RCAR3
 	default "4" if ARM && QEMU
-- 
2.35.3


