linux-kernel - [RFC PATCH v2 27/38] KVM: arm64: Add EL2 registers defined in ARMv8.1 to vcpu context

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Date:   Tue, 18 Jul 2017 11:58:53 -0500
From:   Jintack Lim <jintack.lim@...aro.org>
To:     kvmarm@...ts.cs.columbia.edu, christoffer.dall@...aro.org,
        marc.zyngier@....com
Cc:     corbet@....net, pbonzini@...hat.com, rkrcmar@...hat.com,
        linux@...linux.org.uk, catalin.marinas@....com,
        will.deacon@....com, akpm@...ux-foundation.org, mchehab@...nel.org,
        cov@...eaurora.org, daniel.lezcano@...aro.org,
        david.daney@...ium.com, mark.rutland@....com,
        suzuki.poulose@....com, stefan@...lo-penguin.com,
        andy.gross@...aro.org, wcohen@...hat.com,
        ard.biesheuvel@...aro.org, shankerd@...eaurora.org,
        vladimir.murzin@....com, james.morse@....com,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        kvm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Jintack Lim <jintack.lim@...aro.org>
Subject: [RFC PATCH v2 27/38] KVM: arm64: Add EL2 registers defined in ARMv8.1 to vcpu context

ARMv8.1 added more EL2 registers: TTBR1_EL2, CONTEXTIDR_EL2, and three
EL2 virtual timer registers. Add the first two registers to vcpu context
and set their handlers. The timer registers and their handlers will be
added in a separate patch.

Signed-off-by: Jintack Lim <jintack.lim@...aro.org>
---
 arch/arm64/include/asm/kvm_host.h | 2 ++
 arch/arm64/include/asm/sysreg.h   | 2 ++
 arch/arm64/kvm/sys_regs.c         | 2 ++
 3 files changed, 6 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 53b0b33..373235c 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -151,6 +151,7 @@ enum vcpu_sysreg {
 	HSTR_EL2,	/* Hypervisor System Trap Register */
 	HACR_EL2,	/* Hypervisor Auxiliary Control Register */
 	TTBR0_EL2,	/* Translation Table Base Register 0 (EL2) */
+	TTBR1_EL2,	/* Translation Table Base Register 1 (EL2) */
 	TCR_EL2,	/* Translation Control Register (EL2) */
 	VTTBR_EL2,	/* Virtualization Translation Table Base Register */
 	VTCR_EL2,	/* Virtualization Translation Control Register */
@@ -164,6 +165,7 @@ enum vcpu_sysreg {
 	VBAR_EL2,	/* Vector Base Address Register (EL2) */
 	RVBAR_EL2,	/* Reset Vector Base Address Register */
 	RMR_EL2,	/* Reset Management Register */
+	CONTEXTIDR_EL2,	/* Context ID Register (EL2) */
 	TPIDR_EL2,	/* EL2 Software Thread ID Register */
 	CNTVOFF_EL2,	/* Counter-timer Virtual Offset register */
 	CNTHCTL_EL2,	/* Counter-timer Hypervisor Control register */
diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 6373d3d..b01c608 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -264,6 +264,7 @@
 #define SYS_HACR_EL2			sys_reg(3, 4, 1, 1, 7)
 
 #define SYS_TTBR0_EL2			sys_reg(3, 4, 2, 0, 0)
+#define SYS_TTBR1_EL2			sys_reg(3, 4, 2, 0, 1)
 #define SYS_TCR_EL2			sys_reg(3, 4, 2, 0, 2)
 #define SYS_VTTBR_EL2			sys_reg(3, 4, 2, 1, 0)
 #define SYS_VTCR_EL2			sys_reg(3, 4, 2, 1, 2)
@@ -331,6 +332,7 @@
 #define SYS_ICH_LR14_EL2		__SYS__LR8_EL2(6)
 #define SYS_ICH_LR15_EL2		__SYS__LR8_EL2(7)
 
+#define SYS_CONTEXTIDR_EL2		sys_reg(3, 4, 13, 0, 1)
 #define SYS_TPIDR_EL2			sys_reg(3, 4, 13, 0, 2)
 
 #define SYS_CNTVOFF_EL2			sys_reg(3, 4, 14, 0, 3)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index dbf5022..b3e0cb8 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1168,6 +1168,7 @@ static bool access_cpacr(struct kvm_vcpu *vcpu,
 	{ SYS_DESC(SYS_HACR_EL2), trap_el2_regs, reset_val, HACR_EL2, 0 },
 
 	{ SYS_DESC(SYS_TTBR0_EL2), trap_el2_regs, reset_val, TTBR0_EL2, 0 },
+	{ SYS_DESC(SYS_TTBR1_EL2), trap_el2_regs, reset_val, TTBR1_EL2, 0 },
 	{ SYS_DESC(SYS_TCR_EL2), trap_el2_regs, reset_val, TCR_EL2, 0 },
 	{ SYS_DESC(SYS_VTTBR_EL2), trap_el2_regs, reset_val, VTTBR_EL2, 0 },
 	{ SYS_DESC(SYS_VTCR_EL2), trap_el2_regs, reset_val, VTCR_EL2, 0 },
@@ -1194,6 +1195,7 @@ static bool access_cpacr(struct kvm_vcpu *vcpu,
 	{ SYS_DESC(SYS_RVBAR_EL2), trap_el2_regs, reset_val, RVBAR_EL2, 0 },
 	{ SYS_DESC(SYS_RMR_EL2), trap_el2_regs, reset_val, RMR_EL2, 0 },
 
+	{ SYS_DESC(SYS_CONTEXTIDR_EL2), trap_el2_regs, reset_val, CONTEXTIDR_EL2, 0 },
 	{ SYS_DESC(SYS_TPIDR_EL2), trap_el2_regs, reset_val, TPIDR_EL2, 0 },
 
 	{ SYS_DESC(SYS_CNTVOFF_EL2), trap_el2_regs, reset_val, CNTVOFF_EL2, 0 },
-- 
1.9.1