[Lldb-commits] [lldb] [lldb][AArch64][Linux] Rename Is<ext>Enabled to Is<ext>Present (PR #70303)
David Spickett via lldb-commits
lldb-commits at lists.llvm.org
Thu Oct 26 01:31:54 PDT 2023
https://github.com/DavidSpickett created https://github.com/llvm/llvm-project/pull/70303
For most register sets, if it was enabled this meant you could use it, it was present in the process. There was no present but turned off state. So "enabled" made sense.
Then ZA came along (and soon to be ZT0) where ZA can be present in the hardware when you have SME, but ZA itself can be made inactive. This means that "IsZAEnabled()" doesn't mean is it active, it means do you have SME. Which is very confusing when we actually want to know if ZA is active.
So instead say "IsZAPresent", to make these checks more specific. For things that can't be made inactive, present will imply "active" as they're never inactive.
>From c513a486814ac03d3150f59c1b2c835e379ebdb6 Mon Sep 17 00:00:00 2001
From: David Spickett <david.spickett at linaro.org>
Date: Thu, 26 Oct 2023 08:28:02 +0000
Subject: [PATCH] [lldb][AArch64][Linux] Reanme Is<ext>Enabled to
Is<ext>Present
For most register sets, if it was enabled this meant you could use it,
it was present in the process. There was no present but turned off state.
So "enabled" made sense.
Then ZA came along (and soon to be ZT0) where ZA can be present in the
hardware when you have SME, but ZA itself can be made inactive.
This means that "IsZAEnabled()" doesn't mean is it active, it means
do you have SME. Which is very confusing when we actually want to know
if ZA is active.
So instead say "IsZAPresent", to make these checks more specific.
For things that can't be made inactive, present will imply "active"
as they're never inactive.
---
.../NativeRegisterContextLinux_arm64.cpp | 20 +++++++++----------
.../Process/Utility/RegisterInfoPOSIX_arm64.h | 12 +++++------
.../RegisterContextPOSIXCore_arm64.cpp | 12 +++++------
3 files changed, 22 insertions(+), 22 deletions(-)
diff --git a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
index b5210c368144206..b23b4ed2171b546 100644
--- a/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
+++ b/lldb/source/Plugins/Process/Linux/NativeRegisterContextLinux_arm64.cpp
@@ -166,10 +166,10 @@ NativeRegisterContextLinux_arm64::NativeRegisterContextLinux_arm64(
m_tls_is_valid = false;
// SME adds the tpidr2 register
- m_tls_size = GetRegisterInfo().IsSSVEEnabled() ? sizeof(m_tls_regs)
+ m_tls_size = GetRegisterInfo().IsSSVEPresent() ? sizeof(m_tls_regs)
: sizeof(m_tls_regs.tpidr_reg);
- if (GetRegisterInfo().IsSVEEnabled() || GetRegisterInfo().IsSSVEEnabled())
+ if (GetRegisterInfo().IsSVEPresent() || GetRegisterInfo().IsSSVEPresent())
m_sve_state = SVEState::Unknown;
else
m_sve_state = SVEState::Disabled;
@@ -610,7 +610,7 @@ NativeRegisterContextLinux_arm64::CacheAllRegisters(uint32_t &cached_size) {
return error;
// Here this means, does the system have ZA, not whether it is active.
- if (GetRegisterInfo().IsZAEnabled()) {
+ if (GetRegisterInfo().IsZAPresent()) {
error = ReadZAHeader();
if (error.Fail())
return error;
@@ -628,7 +628,7 @@ NativeRegisterContextLinux_arm64::CacheAllRegisters(uint32_t &cached_size) {
}
// If SVE is enabled we need not copy FPR separately.
- if (GetRegisterInfo().IsSVEEnabled() || GetRegisterInfo().IsSSVEEnabled()) {
+ if (GetRegisterInfo().IsSVEPresent() || GetRegisterInfo().IsSSVEPresent()) {
// Store mode and register data.
cached_size +=
sizeof(RegisterSetType) + sizeof(m_sve_state) + GetSVEBufferSize();
@@ -640,7 +640,7 @@ NativeRegisterContextLinux_arm64::CacheAllRegisters(uint32_t &cached_size) {
if (error.Fail())
return error;
- if (GetRegisterInfo().IsMTEEnabled()) {
+ if (GetRegisterInfo().IsMTEPresent()) {
cached_size += sizeof(RegisterSetType) + GetMTEControlSize();
error = ReadMTEControl();
if (error.Fail())
@@ -708,7 +708,7 @@ Status NativeRegisterContextLinux_arm64::ReadAllRegisterValues(
// constants and the functions vec_set_vector_length, sve_set_common and
// za_set in the Linux Kernel.
- if ((m_sve_state != SVEState::Streaming) && GetRegisterInfo().IsZAEnabled()) {
+ if ((m_sve_state != SVEState::Streaming) && GetRegisterInfo().IsZAPresent()) {
// Use the header size not the buffer size, as we may be using the buffer
// for fake data, which we do not want to write out.
assert(m_za_header.size <= GetZABufferSize());
@@ -716,7 +716,7 @@ Status NativeRegisterContextLinux_arm64::ReadAllRegisterValues(
m_za_header.size);
}
- if (GetRegisterInfo().IsSVEEnabled() || GetRegisterInfo().IsSSVEEnabled()) {
+ if (GetRegisterInfo().IsSVEPresent() || GetRegisterInfo().IsSSVEPresent()) {
dst = AddRegisterSetType(dst, RegisterSetType::SVE);
*(reinterpret_cast<SVEState *>(dst)) = m_sve_state;
dst += sizeof(m_sve_state);
@@ -726,13 +726,13 @@ Status NativeRegisterContextLinux_arm64::ReadAllRegisterValues(
GetFPRSize());
}
- if ((m_sve_state == SVEState::Streaming) && GetRegisterInfo().IsZAEnabled()) {
+ if ((m_sve_state == SVEState::Streaming) && GetRegisterInfo().IsZAPresent()) {
assert(m_za_header.size <= GetZABufferSize());
dst = AddSavedRegisters(dst, RegisterSetType::SME, GetZABuffer(),
m_za_header.size);
}
- if (GetRegisterInfo().IsMTEEnabled()) {
+ if (GetRegisterInfo().IsMTEPresent()) {
dst = AddSavedRegisters(dst, RegisterSetType::MTE, GetMTEControl(),
GetMTEControlSize());
}
@@ -1411,7 +1411,7 @@ std::vector<uint32_t> NativeRegisterContextLinux_arm64::GetExpeditedRegisters(
expedited_reg_nums.push_back(GetRegisterInfo().GetRegNumSVEVG());
// SME, streaming vector length. This is used by the ZA register which is
// present even when streaming mode is not enabled.
- if (GetRegisterInfo().IsSSVEEnabled())
+ if (GetRegisterInfo().IsSSVEPresent())
expedited_reg_nums.push_back(GetRegisterInfo().GetRegNumSMESVG());
return expedited_reg_nums;
diff --git a/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h b/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h
index debdf4c76abc25b..1bb3400e426a917 100644
--- a/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h
+++ b/lldb/source/Plugins/Process/Utility/RegisterInfoPOSIX_arm64.h
@@ -120,12 +120,12 @@ class RegisterInfoPOSIX_arm64
return false;
}
- bool IsSVEEnabled() const { return m_opt_regsets.AnySet(eRegsetMaskSVE); }
- bool IsSSVEEnabled() const { return m_opt_regsets.AnySet(eRegsetMaskSSVE); }
- bool IsZAEnabled() const { return m_opt_regsets.AnySet(eRegsetMaskZA); }
- bool IsPAuthEnabled() const { return m_opt_regsets.AnySet(eRegsetMaskPAuth); }
- bool IsMTEEnabled() const { return m_opt_regsets.AnySet(eRegsetMaskMTE); }
- bool IsTLSEnabled() const { return m_opt_regsets.AnySet(eRegsetMaskTLS); }
+ bool IsSVEPresent() const { return m_opt_regsets.AnySet(eRegsetMaskSVE); }
+ bool IsSSVEPresent() const { return m_opt_regsets.AnySet(eRegsetMaskSSVE); }
+ bool IsZAPresent() const { return m_opt_regsets.AnySet(eRegsetMaskZA); }
+ bool IsPAuthPresent() const { return m_opt_regsets.AnySet(eRegsetMaskPAuth); }
+ bool IsMTEPresent() const { return m_opt_regsets.AnySet(eRegsetMaskMTE); }
+ bool IsTLSPresent() const { return m_opt_regsets.AnySet(eRegsetMaskTLS); }
bool IsSVEReg(unsigned reg) const;
bool IsSVEZReg(unsigned reg) const;
diff --git a/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp
index 99cee83eed12515..db37b7cbb99d7e8 100644
--- a/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp
+++ b/lldb/source/Plugins/Process/elf-core/RegisterContextPOSIXCore_arm64.cpp
@@ -75,7 +75,7 @@ RegisterContextCorePOSIX_arm64::RegisterContextCorePOSIX_arm64(
m_register_info_up->GetTargetArchitecture().GetTriple();
m_fpr_data = getRegset(notes, target_triple, FPR_Desc);
- if (m_register_info_up->IsSSVEEnabled()) {
+ if (m_register_info_up->IsSSVEPresent()) {
m_sve_data = getRegset(notes, target_triple, AARCH64_SSVE_Desc);
lldb::offset_t flags_offset = 12;
uint16_t flags = m_sve_data.GetU32(&flags_offset);
@@ -83,19 +83,19 @@ RegisterContextCorePOSIX_arm64::RegisterContextCorePOSIX_arm64(
m_sve_state = SVEState::Streaming;
}
- if (m_sve_state != SVEState::Streaming && m_register_info_up->IsSVEEnabled())
+ if (m_sve_state != SVEState::Streaming && m_register_info_up->IsSVEPresent())
m_sve_data = getRegset(notes, target_triple, AARCH64_SVE_Desc);
- if (m_register_info_up->IsPAuthEnabled())
+ if (m_register_info_up->IsPAuthPresent())
m_pac_data = getRegset(notes, target_triple, AARCH64_PAC_Desc);
- if (m_register_info_up->IsTLSEnabled())
+ if (m_register_info_up->IsTLSPresent())
m_tls_data = getRegset(notes, target_triple, AARCH64_TLS_Desc);
- if (m_register_info_up->IsZAEnabled())
+ if (m_register_info_up->IsZAPresent())
m_za_data = getRegset(notes, target_triple, AARCH64_ZA_Desc);
- if (m_register_info_up->IsMTEEnabled())
+ if (m_register_info_up->IsMTEPresent())
m_mte_data = getRegset(notes, target_triple, AARCH64_MTE_Desc);
ConfigureRegisterContext();
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