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target/arm: Add ARM_CP_NO_GDB as a new bit field for ARMCPRegInfo type

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This is a preparation for the coming feature of creating dynamically an XML
description for the ARM sysregs.
A register has ARM_CP_NO_GDB enabled will not be shown in the dynamic XML.
This bit is enabled automatically when creating CP_ANY wildcard aliases.
This bit could be enabled manually for any register we want to remove from the
dynamic XML description.

Backports commit 1f16378718fa87d63f70d0797f4546a88d8e3dd7 from qemu
This commit is contained in:
Abdallah Bouassida 2018-05-20 00:15:43 -04:00 committed by Lioncash
parent 31b3a98233
commit 079615b2a0
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GPG Key ID: 4E3C3CC1031BA9C7
2 changed files with 3 additions and 2 deletions
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3
qemu/target/arm/cpu.h
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@ -1787,10 +1787,11 @@ static inline uint64_t cpreg_to_kvm_id(uint32_t cpregid)
#define ARM_LAST_SPECIAL ARM_CP_DC_ZVA
#define ARM_CP_FPU 0x1000
#define ARM_CP_SVE 0x2000
#define ARM_CP_NO_GDB 0x4000
/* Used only as a terminator for ARMCPRegInfo lists */
#define ARM_CP_SENTINEL 0xffff
/* Mask of only the flag bits in a type field */
#define ARM_CP_FLAG_MASK 0x30ff
#define ARM_CP_FLAG_MASK 0x70ff
/* Valid values for ARMCPRegInfo state field, indicating which of
* the AArch32 and AArch64 execution states this register is visible in.

2
qemu/target/arm/helper.c
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@ -4912,7 +4912,7 @@ static void add_cpreg_to_hashtable(ARMCPU *cpu, const ARMCPRegInfo *r,
if (((r->crm == CP_ANY) && crm != 0) ||
((r->opc1 == CP_ANY) && opc1 != 0) ||
((r->opc2 == CP_ANY) && opc2 != 0)) {
r2->type |= ARM_CP_ALIAS;
r2->type |= ARM_CP_ALIAS | ARM_CP_NO_GDB;
}
/* Check that raw accesses are either forbidden or handled. Note that