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[XEN PATCH 1/4] arm/gicv3: Move guest dist base
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>
- Date: Wed, 25 Oct 2023 10:13:02 +0000
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- Cc: Mykyta Poturai <Mykyta_Poturai@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Wed, 25 Oct 2023 10:13:21 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHaByvWbvp1hC9fbkyY87NUJCakNw==
- Thread-topic: [XEN PATCH 1/4] arm/gicv3: Move guest dist base
New vgic code relies on lower address bits to calculate intid from
the address offset. 0x03001000 as DIST_BASE overlaps with
VGIC_ADDR_IRQ_MASK when bits_per_irq >= 64, breaking the intid calculation.
Move DIST_BASE to a safer location to fix this.
Signed-off-by: Mykyta Poturai <mykyta_poturai@xxxxxxxx>
---
xen/include/public/arch-arm.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/xen/include/public/arch-arm.h b/xen/include/public/arch-arm.h
index a25e87dbda..71fa25b1d4 100644
--- a/xen/include/public/arch-arm.h
+++ b/xen/include/public/arch-arm.h
@@ -438,7 +438,7 @@ typedef uint64_t xen_callback_t;
#define GUEST_GICC_SIZE xen_mk_ullong(0x00002000)
/* vGIC v3 mappings */
-#define GUEST_GICV3_GICD_BASE xen_mk_ullong(0x03001000)
+#define GUEST_GICV3_GICD_BASE xen_mk_ullong(0x03000000)
#define GUEST_GICV3_GICD_SIZE xen_mk_ullong(0x00010000)
#define GUEST_GICV3_RDIST_REGIONS 1
--
2.34.1
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