linux-kernel - [PATCH v2 04/18] arm64: KVM: add SPE system registers to sys_reg

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Date:   Fri, 20 Dec 2019 14:30:11 +0000
From:   Andrew Murray <andrew.murray@....com>
To:     Marc Zyngier <marc.zyngier@....com>,
        Catalin Marinas <catalin.marinas@....com>,
        Will Deacon <will.deacon@....com>
Cc:     Sudeep Holla <sudeep.holla@....com>, kvmarm@...ts.cs.columbia.edu,
        linux-arm-kernel@...ts.infradead.org, kvm@...r.kernel.org,
        linux-kernel@...r.kernel.org, Mark Rutland <mark.rutland@....com>
Subject: [PATCH v2 04/18] arm64: KVM: add SPE system registers to sys_reg_descs

From: Sudeep Holla <sudeep.holla@....com>

Add the Statistical Profiling Extension(SPE) Profiling Buffer controls
registers such that we can provide initial register values and use the
sys_regs structure as a store for our SPE context.

Signed-off-by: Sudeep Holla <sudeep.holla@....com>
[ Reword commit, remove access/reset handlers, defer kvm_arm_support_spe_v1 ]
Signed-off-by: Andrew Murray <andrew.murray@....com>
---
 arch/arm64/include/asm/kvm_host.h | 12 ++++++++++++
 arch/arm64/kvm/sys_regs.c         | 11 +++++++++++
 2 files changed, 23 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index f5dcff912645..9eb85f14df90 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -145,6 +145,18 @@ enum vcpu_sysreg {
 	MDCCINT_EL1,	/* Monitor Debug Comms Channel Interrupt Enable Reg */
 	DISR_EL1,	/* Deferred Interrupt Status Register */
 
+	/* Statistical Profiling Extension Registers */
+	PMSCR_EL1,
+	PMSICR_EL1,
+	PMSIRR_EL1,
+	PMSFCR_EL1,
+	PMSEVFR_EL1,
+	PMSLATFR_EL1,
+	PMSIDR_EL1,
+	PMBLIMITR_EL1,
+	PMBPTR_EL1,
+	PMBSR_EL1,
+
 	/* Performance Monitors Registers */
 	PMCR_EL0,	/* Control Register */
 	PMSELR_EL0,	/* Event Counter Selection Register */
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 46822afc57e0..955b157f9cc5 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1506,6 +1506,17 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	{ SYS_DESC(SYS_FAR_EL1), access_vm_reg, reset_unknown, FAR_EL1 },
 	{ SYS_DESC(SYS_PAR_EL1), NULL, reset_unknown, PAR_EL1 },
 
+	{ SYS_DESC(SYS_PMSCR_EL1), NULL, reset_val, PMSCR_EL1, 0 },
+	{ SYS_DESC(SYS_PMSICR_EL1), NULL, reset_val, PMSICR_EL1, 0 },
+	{ SYS_DESC(SYS_PMSIRR_EL1), NULL, reset_val, PMSIRR_EL1, 0 },
+	{ SYS_DESC(SYS_PMSFCR_EL1), NULL, reset_val, PMSFCR_EL1, 0 },
+	{ SYS_DESC(SYS_PMSEVFR_EL1), NULL, reset_val, PMSEVFR_EL1, 0 },
+	{ SYS_DESC(SYS_PMSLATFR_EL1), NULL, reset_val, PMSLATFR_EL1, 0 },
+	{ SYS_DESC(SYS_PMSIDR_EL1), NULL, reset_val, PMSIDR_EL1, 0 },
+	{ SYS_DESC(SYS_PMBLIMITR_EL1), NULL, reset_val, PMBLIMITR_EL1, 0 },
+	{ SYS_DESC(SYS_PMBPTR_EL1), NULL, reset_val, PMBPTR_EL1, 0 },
+	{ SYS_DESC(SYS_PMBSR_EL1), NULL, reset_val, PMBSR_EL1, 0 },
+
 	{ SYS_DESC(SYS_PMINTENSET_EL1), access_pminten, reset_unknown, PMINTENSET_EL1 },
 	{ SYS_DESC(SYS_PMINTENCLR_EL1), access_pminten, NULL, PMINTENSET_EL1 },
 
-- 
2.21.0