linux-kernel - Re: [PATCH v4 18/43] arm64: RME: Handle realm enter/exit

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Message-ID: <yq5a5xrt2oov.fsf@kernel.org>
Date: Thu, 22 Aug 2024 09:28:56 +0530
From: Aneesh Kumar K.V <aneesh.kumar@...nel.org>
To: Steven Price <steven.price@....com>, kvm@...r.kernel.org,
	kvmarm@...ts.linux.dev
Cc: Steven Price <steven.price@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Marc Zyngier <maz@...nel.org>, Will Deacon <will@...nel.org>,
	James Morse <james.morse@....com>,
	Oliver Upton <oliver.upton@...ux.dev>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Zenghui Yu <yuzenghui@...wei.com>,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Joey Gouly <joey.gouly@....com>,
	Alexandru Elisei <alexandru.elisei@....com>,
	Christoffer Dall <christoffer.dall@....com>,
	Fuad Tabba <tabba@...gle.com>, linux-coco@...ts.linux.dev,
	Ganapatrao Kulkarni <gankulkarni@...amperecomputing.com>,
	Gavin Shan <gshan@...hat.com>,
	Shanker Donthineni <sdonthineni@...dia.com>,
	Alper Gun <alpergun@...gle.com>
Subject: Re: [PATCH v4 18/43] arm64: RME: Handle realm enter/exit

Steven Price <steven.price@....com> writes:

> +	/* Exit to VMM to complete the change */
> +	kvm_prepare_memory_fault_exit(vcpu, base, top_ipa - base, false, false,
> +				      ripas == 1);
> +


s/1/RMI_RAM ?

May be we can make it an enum like rsi_ripas

modified   arch/arm64/include/asm/rmi_smc.h
@@ -62,9 +62,11 @@
 #define RMI_ERROR_REC		3
 #define RMI_ERROR_RTT		4
 
-#define RMI_EMPTY		0
-#define RMI_RAM			1
-#define RMI_DESTROYED		2
+enum rmi_ripas {
+	RMI_EMPTY,
+	RMI_RAM,
+	RMI_DESTROYED,
+};
 
 #define RMI_NO_MEASURE_CONTENT	0
 #define RMI_MEASURE_CONTENT	1
modified   arch/arm64/kvm/rme-exit.c
@@ -112,7 +112,7 @@ static int rec_exit_ripas_change(struct kvm_vcpu *vcpu)
 
 	/* Exit to VMM to complete the change */
 	kvm_prepare_memory_fault_exit(vcpu, base, top_ipa - base, false, false,
-				      ripas == 1);
+				      ripas == RMI_RAM);
 
 	return 0;
 }