linux-kernel - [PATCH v1 2/5] arm64: KVM: Rename DEBUG_STATE_SAVE_TRBE to DEBUG_STATE_SAVE

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Date:   Thu, 28 Sep 2023 16:16:06 +0100
From:   James Clark <james.clark@....com>
To:     coresight@...ts.linaro.org, linux-arm-kernel@...ts.infradead.org,
        kvmarm@...ts.linux.dev, broonie@...nel.org, maz@...nel.org,
        suzuki.poulose@....com
Cc:     James Clark <james.clark@....com>,
        Oliver Upton <oliver.upton@...ux.dev>,
        James Morse <james.morse@....com>,
        Zenghui Yu <yuzenghui@...wei.com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will@...nel.org>,
        Mike Leach <mike.leach@...aro.org>,
        Leo Yan <leo.yan@...aro.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Anshuman Khandual <anshuman.khandual@....com>,
        Rob Herring <robh@...nel.org>,
        Jintack Lim <jintack.lim@...aro.org>,
        Joey Gouly <joey.gouly@....com>, linux-kernel@...r.kernel.org
Subject: [PATCH v1 2/5] arm64: KVM: Rename DEBUG_STATE_SAVE_TRBE to DEBUG_STATE_SAVE_TRFCR

This flag actually causes the TRFCR register to be saved, so rename it
to that effect.

Currently it only happens when TRBE is used, but in a later commit
TRFCR will be saved and restored even if TRBE isn't used, so the new
name will be more accurate.

Signed-off-by: James Clark <james.clark@....com>
---
 arch/arm64/include/asm/kvm_host.h  | 4 ++--
 arch/arm64/kvm/debug.c             | 4 ++--
 arch/arm64/kvm/hyp/nvhe/debug-sr.c | 4 ++--
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index c3a17888f183..498f922f4f41 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -713,8 +713,8 @@ struct kvm_vcpu_arch {
 #define DEBUG_DIRTY		__vcpu_single_flag(iflags, BIT(4))
 /* Save SPE context if active  */
 #define DEBUG_STATE_SAVE_SPE	__vcpu_single_flag(iflags, BIT(5))
-/* Save TRBE context if active  */
-#define DEBUG_STATE_SAVE_TRBE	__vcpu_single_flag(iflags, BIT(6))
+/* Save TRFCR and disable TRBE if necessary */
+#define DEBUG_STATE_SAVE_TRFCR	__vcpu_single_flag(iflags, BIT(6))
 /* vcpu running in HYP context */
 #define VCPU_HYP_CONTEXT	__vcpu_single_flag(iflags, BIT(7))
 
diff --git a/arch/arm64/kvm/debug.c b/arch/arm64/kvm/debug.c
index 8725291cb00a..6a1bad1a921b 100644
--- a/arch/arm64/kvm/debug.c
+++ b/arch/arm64/kvm/debug.c
@@ -334,11 +334,11 @@ void kvm_arch_vcpu_load_debug_state_flags(struct kvm_vcpu *vcpu)
 	/* Check if we have TRBE implemented and available at the host */
 	if (cpuid_feature_extract_unsigned_field(dfr0, ID_AA64DFR0_EL1_TraceBuffer_SHIFT) &&
 	    !(read_sysreg_s(SYS_TRBIDR_EL1) & TRBIDR_EL1_P))
-		vcpu_set_flag(vcpu, DEBUG_STATE_SAVE_TRBE);
+		vcpu_set_flag(vcpu, DEBUG_STATE_SAVE_TRFCR);
 }
 
 void kvm_arch_vcpu_put_debug_state_flags(struct kvm_vcpu *vcpu)
 {
 	vcpu_clear_flag(vcpu, DEBUG_STATE_SAVE_SPE);
-	vcpu_clear_flag(vcpu, DEBUG_STATE_SAVE_TRBE);
+	vcpu_clear_flag(vcpu, DEBUG_STATE_SAVE_TRFCR);
 }
diff --git a/arch/arm64/kvm/hyp/nvhe/debug-sr.c b/arch/arm64/kvm/hyp/nvhe/debug-sr.c
index 4558c02eb352..89c208112eb7 100644
--- a/arch/arm64/kvm/hyp/nvhe/debug-sr.c
+++ b/arch/arm64/kvm/hyp/nvhe/debug-sr.c
@@ -85,7 +85,7 @@ void __debug_save_host_buffers_nvhe(struct kvm_vcpu *vcpu)
 	if (vcpu_get_flag(vcpu, DEBUG_STATE_SAVE_SPE))
 		__debug_save_spe(&vcpu->arch.host_debug_state.pmscr_el1);
 	/* Disable and flush Self-Hosted Trace generation */
-	if (vcpu_get_flag(vcpu, DEBUG_STATE_SAVE_TRBE))
+	if (vcpu_get_flag(vcpu, DEBUG_STATE_SAVE_TRFCR))
 		__debug_save_trace(&vcpu->arch.host_debug_state.trfcr_el1);
 }
 
@@ -98,7 +98,7 @@ void __debug_restore_host_buffers_nvhe(struct kvm_vcpu *vcpu)
 {
 	if (vcpu_get_flag(vcpu, DEBUG_STATE_SAVE_SPE))
 		__debug_restore_spe(vcpu->arch.host_debug_state.pmscr_el1);
-	if (vcpu_get_flag(vcpu, DEBUG_STATE_SAVE_TRBE))
+	if (vcpu_get_flag(vcpu, DEBUG_STATE_SAVE_TRFCR))
 		__debug_restore_trace(vcpu->arch.host_debug_state.trfcr_el1);
 }
 
-- 
2.34.1