Subject: [PATCH v2 47/94] KVM: arm64: nv: Handle traps for timer _EL02 and _EL2 sysregs accessors

From: Marc Zyngier <[email-masked]>
Date: Tue, 11 Feb 2020 17:48:51 +0000

From: Andre Przywara <[email-masked]>

Add trap handlers for the timer system registers accessed from a guest
hypervisors using either _EL02 or _EL2 system register access
instructions.

Signed-off-by: Andre Przywara <[email-masked]>
Signed-off-by: Jintack Lim <[email-masked]>
Signed-off-by: Marc Zyngier <[email-masked]>
---
 arch/arm64/include/asm/sysreg.h |  6 ++++++
 arch/arm64/kvm/sys_regs.c       | 15 +++++++++++++++
 2 files changed, 21 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index bf465ddde59e..92c97a19369e 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -496,6 +496,12 @@
 
 #define SYS_CNTVOFF_EL2			sys_reg(3, 4, 14, 0, 3)
 #define SYS_CNTHCTL_EL2			sys_reg(3, 4, 14, 1, 0)
+#define SYS_CNTHP_TVAL_EL2		sys_reg(3, 4, 14, 2, 0)
+#define SYS_CNTHP_CTL_EL2		sys_reg(3, 4, 14, 2, 1)
+#define SYS_CNTHP_CVAL_EL2		sys_reg(3, 4, 14, 2, 2)
+#define SYS_CNTHV_TVAL_EL2		sys_reg(3, 4, 14, 3, 0)
+#define SYS_CNTHV_CTL_EL2		sys_reg(3, 4, 14, 3, 1)
+#define SYS_CNTHV_CVAL_EL2		sys_reg(3, 4, 14, 3, 2)
 
 /* VHE encodings for architectural EL0/1 system registers */
 #define SYS_SCTLR_EL12			sys_reg(3, 5, 1, 0, 0)
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 527319ff83f1..5d9ca3988745 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2078,6 +2078,13 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	{ SYS_DESC(SYS_CNTVOFF_EL2), access_rw, reset_val, CNTVOFF_EL2, 0 },
 	{ SYS_DESC(SYS_CNTHCTL_EL2), access_rw, reset_val, CNTHCTL_EL2, 0 },
 
+	{ SYS_DESC(SYS_CNTHP_TVAL_EL2), access_arch_timer },
+	{ SYS_DESC(SYS_CNTHP_CTL_EL2), access_arch_timer },
+	{ SYS_DESC(SYS_CNTHP_CVAL_EL2), access_arch_timer },
+	{ SYS_DESC(SYS_CNTHV_TVAL_EL2), access_arch_timer },
+	{ SYS_DESC(SYS_CNTHV_CTL_EL2), access_arch_timer },
+	{ SYS_DESC(SYS_CNTHV_CVAL_EL2), access_arch_timer },
+
 	{ SYS_DESC(SYS_SCTLR_EL12), access_vm_reg, reset_val, SCTLR_EL1, 0x00C50078 },
 	{ SYS_DESC(SYS_CPACR_EL12), access_rw, reset_val, CPACR_EL1, 0 },
 	{ SYS_DESC(SYS_TTBR0_EL12), access_vm_reg, reset_unknown, TTBR0_EL1 },
@@ -2095,6 +2102,14 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	{ SYS_DESC(SYS_CONTEXTIDR_EL12), access_vm_reg, reset_val, CONTEXTIDR_EL1, 0 },
 	{ SYS_DESC(SYS_CNTKCTL_EL12), access_rw, reset_val, CNTKCTL_EL1, 0 },
 
+	{ SYS_DESC(SYS_CNTP_TVAL_EL02), access_arch_timer },
+	{ SYS_DESC(SYS_CNTP_CTL_EL02), access_arch_timer },
+	{ SYS_DESC(SYS_CNTP_CVAL_EL02), access_arch_timer },
+
+	{ SYS_DESC(SYS_CNTV_TVAL_EL02), access_arch_timer },
+	{ SYS_DESC(SYS_CNTV_CTL_EL02), access_arch_timer },
+	{ SYS_DESC(SYS_CNTV_CVAL_EL02), access_arch_timer },
+
 	{ SYS_DESC(SYS_SP_EL2), NULL, reset_unknown, SP_EL2 },
 };
 
-- 
2.20.1

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