ANDROID: fault: Add vendor hook for TLB conflict

Add android_vh_handle_tlb_conf vendor hook to gracefully
handle TLB conflict.

Leaf changes summary: 1 artifact changed
Changed leaf types summary: 0 leaf type changed
Removed/Changed/Added functions summary: 0 Removed, 0 Changed, 0 Added function
Removed/Changed/Added variables summary: 0 Removed, 0 Changed, 1 Added variable

1 Added variable:

  [A] 'tracepoint __tracepoint_android_vh_handle_tlb_conf'

Bug: 222637802
Change-Id: I3d6814cd950e77e1a15ce444764078692724cd0a
Signed-off-by: Naina Mehta <quic_nainmeht@quicinc.com>

android/abi_gki_aarch64.xml

@@ -6049,6 +6049,7 @@
       <elf-symbol name='__tracepoint_android_vh_get_from_fragment_pool' size='72' type='object-type' binding='global-binding' visibility='default-visibility' is-defined='yes' crc='0x801cc5b5'/>
       <elf-symbol name='__tracepoint_android_vh_gic_resume' size='72' type='object-type' binding='global-binding' visibility='default-visibility' is-defined='yes' crc='0x80464cd'/>
       <elf-symbol name='__tracepoint_android_vh_gpio_block_read' size='72' type='object-type' binding='global-binding' visibility='default-visibility' is-defined='yes' crc='0x4842b6e5'/>
+      <elf-symbol name='__tracepoint_android_vh_handle_tlb_conf' size='72' type='object-type' binding='global-binding' visibility='default-visibility' is-defined='yes' crc='0x1907b86d'/>
       <elf-symbol name='__tracepoint_android_vh_include_reserved_zone' size='72' type='object-type' binding='global-binding' visibility='default-visibility' is-defined='yes' crc='0xdf6b3544'/>
       <elf-symbol name='__tracepoint_android_vh_iommu_alloc_iova' size='72' type='object-type' binding='global-binding' visibility='default-visibility' is-defined='yes' crc='0x456fc48'/>
       <elf-symbol name='__tracepoint_android_vh_iommu_free_iova' size='72' type='object-type' binding='global-binding' visibility='default-visibility' is-defined='yes' crc='0xd04c533c'/>
@@ -117500,6 +117501,7 @@
       <var-decl name='__tracepoint_android_vh_get_from_fragment_pool' type-id='4ca0c298' mangled-name='__tracepoint_android_vh_get_from_fragment_pool' visibility='default' filepath='include/trace/hooks/mm.h' line='57' column='1' elf-symbol-id='__tracepoint_android_vh_get_from_fragment_pool'/>
       <var-decl name='__tracepoint_android_vh_gic_resume' type-id='4ca0c298' mangled-name='__tracepoint_android_vh_gic_resume' visibility='default' filepath='include/trace/hooks/gic.h' line='15' column='1' elf-symbol-id='__tracepoint_android_vh_gic_resume'/>
       <var-decl name='__tracepoint_android_vh_gpio_block_read' type-id='4ca0c298' mangled-name='__tracepoint_android_vh_gpio_block_read' visibility='default' filepath='include/trace/hooks/gpiolib.h' line='15' column='1' elf-symbol-id='__tracepoint_android_vh_gpio_block_read'/>
+      <var-decl name='__tracepoint_android_vh_handle_tlb_conf' type-id='4ca0c298' mangled-name='__tracepoint_android_vh_handle_tlb_conf' visibility='default' filepath='include/trace/hooks/fault.h' line='32' column='1' elf-symbol-id='__tracepoint_android_vh_handle_tlb_conf'/>
       <var-decl name='__tracepoint_android_vh_include_reserved_zone' type-id='4ca0c298' mangled-name='__tracepoint_android_vh_include_reserved_zone' visibility='default' filepath='include/trace/hooks/mm.h' line='64' column='1' elf-symbol-id='__tracepoint_android_vh_include_reserved_zone'/>
       <var-decl name='__tracepoint_android_vh_iommu_alloc_iova' type-id='4ca0c298' mangled-name='__tracepoint_android_vh_iommu_alloc_iova' visibility='default' filepath='include/trace/hooks/iommu.h' line='23' column='1' elf-symbol-id='__tracepoint_android_vh_iommu_alloc_iova'/>
       <var-decl name='__tracepoint_android_vh_iommu_free_iova' type-id='4ca0c298' mangled-name='__tracepoint_android_vh_iommu_free_iova' visibility='default' filepath='include/trace/hooks/iommu.h' line='33' column='1' elf-symbol-id='__tracepoint_android_vh_iommu_free_iova'/>

android/abi_gki_aarch64_qcom

@@ -2688,6 +2688,7 @@
   __tracepoint_android_vh_ftrace_size_check
   __tracepoint_android_vh_gic_resume
   __tracepoint_android_vh_gpio_block_read
+  __tracepoint_android_vh_handle_tlb_conf
   __tracepoint_android_vh_iommu_setup_dma_ops
   __tracepoint_android_vh_ipi_stop
   __tracepoint_android_vh_jiffies_update

arch/arm64/include/asm/esr.h

@@ -112,6 +112,7 @@
 #define ESR_ELx_FSC_ACCESS	(0x08)
 #define ESR_ELx_FSC_FAULT	(0x04)
 #define ESR_ELx_FSC_PERM	(0x0C)
+#define ESR_ELx_FSC_TLBCONF	(0x30)
 
 /* ISS field definitions for Data Aborts */
 #define ESR_ELx_ISV_SHIFT	(24)

arch/arm64/mm/fault.c

@@ -711,7 +711,11 @@ static int do_alignment_fault(unsigned long far, unsigned int esr,
 
 static int do_bad(unsigned long far, unsigned int esr, struct pt_regs *regs)
 {
-	return 1; /* "fault" */
+	unsigned long addr = untagged_addr(far);
+	int ret = 1;
+
+	trace_android_vh_handle_tlb_conf(addr, esr, &ret);
+	return ret;
 }
 
 static int do_sea(unsigned long far, unsigned int esr, struct pt_regs *regs)

drivers/android/vendor_hooks.c

@@ -392,3 +392,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_free_proc);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_thread_release);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_has_work_ilocked);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_binder_read_done);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_handle_tlb_conf);

include/trace/hooks/fault.h

@@ -29,6 +29,10 @@ DECLARE_RESTRICTED_HOOK(android_rvh_do_sp_pc_abort,
 	TP_ARGS(regs, esr, addr, user),
 	TP_CONDITION(!user));
 
+DECLARE_HOOK(android_vh_handle_tlb_conf,
+	TP_PROTO(unsigned long addr, unsigned int esr, int *ret),
+	TP_ARGS(addr, esr, ret));
+
 /* macro versions of hooks are no longer required */
 
 #endif /* _TRACE_HOOK_FAULT_H */