[edk2-devel] [PATCH v1 07/11] ShellPkg: Acpiview: Update MADT parser for TRBE interrupt

[Sami Mujawar]

ACPI 6.5 introduces a new filed to the MADT GICC
structure to specify the TRBE interrupt. The TRBE
interrupt is a Processor Private interrupt (PPI)
and is used to specify a platform-specific
interrupt to signal TRBE events.

Therefore, update the MADT GICC structure parser
to parse the new TRBE interrupt field. Also, add
validations to check that the TRBE interrupt is
within the PPI interrupt range.

Signed-off-by: Sami Mujawar <sami.mujawar at arm.com>
---
 ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Madt/MadtParser.c | 48 +++++++++++++++++++-
 1 file changed, 46 insertions(+), 2 deletions(-)

diff --git a/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Madt/MadtParser.c b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Madt/MadtParser.c
index 41edcb9ffd1da90893c04e8284ea3317a9e3b45a..3a4f246347f8ad3489fda083e3268e73baa9bc92 100644
--- a/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Madt/MadtParser.c
+++ b/ShellPkg/Library/UefiShellAcpiViewCommandLib/Parsers/Madt/MadtParser.c
@@ -1,7 +1,7 @@
 /** @file
   MADT table parser
 
-  Copyright (c) 2016 - 2020, ARM Limited. All rights reserved.
+  Copyright (c) 2016 - 2023, ARM Limited. All rights reserved.
   Copyright (c) 2022, AMD Incorporated. All rights reserved.
   SPDX-License-Identifier: BSD-2-Clause-Patent
 
@@ -97,6 +97,48 @@ ValidateSpeOverflowInterrupt (
   }
 }
 
+/**
+  This function validates the TRBE Interrupt in the GICC.
+
+  @param [in] Ptr     Pointer to the start of the field data.
+  @param [in] Context Pointer to context specific information e.g. this
+                      could be a pointer to the ACPI table header.
+**/
+STATIC
+VOID
+EFIAPI
+ValidateTrbeInterrupt (
+  IN UINT8  *Ptr,
+  IN VOID   *Context
+  )
+{
+  UINT16  TrbeInterrupt;
+
+  TrbeInterrupt = *(UINT16 *)Ptr;
+
+  // SPE not supported by this processor
+  if (TrbeInterrupt == 0) {
+    return;
+  }
+
+  if ((TrbeInterrupt < ARM_PPI_ID_MIN) ||
+      ((TrbeInterrupt > ARM_PPI_ID_MAX) &&
+       (TrbeInterrupt < ARM_PPI_ID_EXTENDED_MIN)) ||
+      (TrbeInterrupt > ARM_PPI_ID_EXTENDED_MAX))
+  {
+    IncrementErrorCount ();
+    Print (
+      L"\nERROR: TRBE Interrupt ID of %d is not in the allowed PPI ID "
+      L"ranges of %d-%d or %d-%d (for GICv3.1 or later).",
+      TrbeInterrupt,
+      ARM_PPI_ID_MIN,
+      ARM_PPI_ID_MAX,
+      ARM_PPI_ID_EXTENDED_MIN,
+      ARM_PPI_ID_EXTENDED_MAX
+      );
+  }
+}
+
 /**
   An ACPI_PARSER array describing the GICC Interrupt Controller Structure.
 **/
@@ -122,7 +164,9 @@ STATIC CONST ACPI_PARSER  GicCParser[] = {
     NULL },
   { L"Reserved",                         1, 77, L"0x%x",  NULL, NULL, NULL, NULL },
   { L"SPE overflow Interrupt",           2, 78, L"0x%x",  NULL, NULL,
-    ValidateSpeOverflowInterrupt, NULL }
+    ValidateSpeOverflowInterrupt, NULL },
+  { L"TRBE Interrupt",                   2, 80, L"0x%x",  NULL, NULL,
+    ValidateTrbeInterrupt, NULL }
 };
 
 /**
-- 
'Guid(CE165669-3EF3-493F-B85D-6190EE5B9759)'



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