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[Stable-8.2.10,17/42] amd_iommu: Use correct DTE field for interrupt passthrough

Message ID 20250315074249.634718-17-mjt@tls.msk.ru (mailing list archive)
State New
Headers show
Series Patch Round-up for stable 8.2.10, freeze on 2025-03-24 | expand

Commit Message

Michael Tokarev March 15, 2025, 7:42 a.m. UTC 
From: Sairaj Kodilkar <sarunkod@amd.com>

Interrupt passthrough is determine by the bits 191,190,187-184.
These bits are part of the 3rd quad word (i.e. index 2) in DTE. Hence
replace dte[3] by dte[2].

Fixes: b44159fe0 ("x86_iommu/amd: Add interrupt remap support when VAPIC is not enabled")
Signed-off-by: Sairaj Kodilkar <sarunkod@amd.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Message-Id: <20250207045354.27329-2-sarunkod@amd.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit 63dc0b8647391b372f3bb38ff1066f6b4a5e6ea1)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>
diff mbox series

Patch

diff --git a/hw/i386/amd_iommu.c b/hw/i386/amd_iommu.c
index 12742b1433..4697864123 100644
--- a/hw/i386/amd_iommu.c
+++ b/hw/i386/amd_iommu.c
@@ -1279,15 +1279,15 @@  static int amdvi_int_remap_msi(AMDVIState *iommu,
         ret = -AMDVI_IR_ERR;
         break;
     case AMDVI_IOAPIC_INT_TYPE_NMI:
-        pass = dte[3] & AMDVI_DEV_NMI_PASS_MASK;
+        pass = dte[2] & AMDVI_DEV_NMI_PASS_MASK;
         trace_amdvi_ir_delivery_mode("nmi");
         break;
     case AMDVI_IOAPIC_INT_TYPE_INIT:
-        pass = dte[3] & AMDVI_DEV_INT_PASS_MASK;
+        pass = dte[2] & AMDVI_DEV_INT_PASS_MASK;
         trace_amdvi_ir_delivery_mode("init");
         break;
     case AMDVI_IOAPIC_INT_TYPE_EINT:
-        pass = dte[3] & AMDVI_DEV_EINT_PASS_MASK;
+        pass = dte[2] & AMDVI_DEV_EINT_PASS_MASK;
         trace_amdvi_ir_delivery_mode("eint");
         break;
     default: