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From: Marc Zyngier <maz@kernel.org>
To: kvmarm@lists.linux.dev, kvm@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Cc: Alexandru Elisei <alexandru.elisei@arm.com>,
	Andre Przywara <andre.przywara@arm.com>,
	Chase Conklin <chase.conklin@arm.com>,
	Christoffer Dall <christoffer.dall@arm.com>,
	Ganapatrao Kulkarni <gankulkarni@os.amperecomputing.com>,
	Darren Hart <darren@os.amperecomputing.com>,
	Jintack Lim <jintack@cs.columbia.edu>,
	Russell King <rmk+kernel@armlinux.org.uk>,
	Miguel Luis <miguel.luis@oracle.com>,
	James Morse <james.morse@arm.com>,
	Suzuki K Poulose <suzuki.poulose@arm.com>,
	Oliver Upton <oliver.upton@linux.dev>,
	Zenghui Yu <yuzenghui@huawei.com>
Subject: [PATCH v11 26/43] KVM: arm64: nv: Add handling of EL2-specific timer registers
Date: Mon, 20 Nov 2023 13:10:10 +0000	[thread overview]
Message-ID: <20231120131027.854038-27-maz@kernel.org> (raw)
In-Reply-To: <20231120131027.854038-1-maz@kernel.org>

Add the required handling for EL2 and EL02 registers, as
well as EL1 registers used in the E2H context. This includes
handling the virtual timer accesses when CNTHCTL_EL2.EL1TVT is set.

Signed-off-by: Marc Zyngier <maz@kernel.org>
---
 arch/arm64/include/asm/sysreg.h |   2 +
 arch/arm64/kvm/sys_regs.c       | 123 ++++++++++++++++++++++++++++++++
 2 files changed, 125 insertions(+)

diff --git a/arch/arm64/include/asm/sysreg.h b/arch/arm64/include/asm/sysreg.h
index 30952f1ac997..e36abbcbf4fa 100644
--- a/arch/arm64/include/asm/sysreg.h
+++ b/arch/arm64/include/asm/sysreg.h
@@ -457,6 +457,7 @@
 #define SYS_CNTFRQ_EL0			sys_reg(3, 3, 14, 0, 0)
 
 #define SYS_CNTPCT_EL0			sys_reg(3, 3, 14, 0, 1)
+#define SYS_CNTVCT_EL0			sys_reg(3, 3, 14, 0, 2)
 #define SYS_CNTPCTSS_EL0		sys_reg(3, 3, 14, 0, 5)
 #define SYS_CNTVCTSS_EL0		sys_reg(3, 3, 14, 0, 6)
 
@@ -464,6 +465,7 @@
 #define SYS_CNTP_CTL_EL0		sys_reg(3, 3, 14, 2, 1)
 #define SYS_CNTP_CVAL_EL0		sys_reg(3, 3, 14, 2, 2)
 
+#define SYS_CNTV_TVAL_EL0		sys_reg(3, 3, 14, 3, 0)
 #define SYS_CNTV_CTL_EL0		sys_reg(3, 3, 14, 3, 1)
 #define SYS_CNTV_CVAL_EL0		sys_reg(3, 3, 14, 3, 2)
 
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index 7405053a6dc8..a24feb4b2839 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -1424,26 +1424,130 @@ static bool access_arch_timer(struct kvm_vcpu *vcpu,
 
 	switch (reg) {
 	case SYS_CNTP_TVAL_EL0:
+		if (is_hyp_ctxt(vcpu) && vcpu_el2_e2h_is_set(vcpu))
+			tmr = TIMER_HPTIMER;
+		else
+			tmr = TIMER_PTIMER;
+		treg = TIMER_REG_TVAL;
+		break;
+
+	case SYS_CNTV_TVAL_EL0:
+		if (is_hyp_ctxt(vcpu) && vcpu_el2_e2h_is_set(vcpu))
+			tmr = TIMER_HVTIMER;
+		else
+			tmr = TIMER_VTIMER;
+		treg = TIMER_REG_TVAL;
+		break;
+
 	case SYS_AARCH32_CNTP_TVAL:
+	case SYS_CNTP_TVAL_EL02:
 		tmr = TIMER_PTIMER;
 		treg = TIMER_REG_TVAL;
 		break;
+
+	case SYS_CNTV_TVAL_EL02:
+		tmr = TIMER_VTIMER;
+		treg = TIMER_REG_TVAL;
+		break;
+
+	case SYS_CNTHP_TVAL_EL2:
+		tmr = TIMER_HPTIMER;
+		treg = TIMER_REG_TVAL;
+		break;
+
+	case SYS_CNTHV_TVAL_EL2:
+		tmr = TIMER_HVTIMER;
+		treg = TIMER_REG_TVAL;
+		break;
+
 	case SYS_CNTP_CTL_EL0:
+		if (is_hyp_ctxt(vcpu) && vcpu_el2_e2h_is_set(vcpu))
+			tmr = TIMER_HPTIMER;
+		else
+			tmr = TIMER_PTIMER;
+		treg = TIMER_REG_CTL;
+		break;
+
+	case SYS_CNTV_CTL_EL0:
+		if (is_hyp_ctxt(vcpu) && vcpu_el2_e2h_is_set(vcpu))
+			tmr = TIMER_HVTIMER;
+		else
+			tmr = TIMER_VTIMER;
+		treg = TIMER_REG_CTL;
+		break;
+
 	case SYS_AARCH32_CNTP_CTL:
+	case SYS_CNTP_CTL_EL02:
 		tmr = TIMER_PTIMER;
 		treg = TIMER_REG_CTL;
 		break;
+
+	case SYS_CNTV_CTL_EL02:
+		tmr = TIMER_VTIMER;
+		treg = TIMER_REG_CTL;
+		break;
+
+	case SYS_CNTHP_CTL_EL2:
+		tmr = TIMER_HPTIMER;
+		treg = TIMER_REG_CTL;
+		break;
+
+	case SYS_CNTHV_CTL_EL2:
+		tmr = TIMER_HVTIMER;
+		treg = TIMER_REG_CTL;
+		break;
+
 	case SYS_CNTP_CVAL_EL0:
+		if (is_hyp_ctxt(vcpu) && vcpu_el2_e2h_is_set(vcpu))
+			tmr = TIMER_HPTIMER;
+		else
+			tmr = TIMER_PTIMER;
+		treg = TIMER_REG_CVAL;
+		break;
+
+	case SYS_CNTV_CVAL_EL0:
+		if (is_hyp_ctxt(vcpu) && vcpu_el2_e2h_is_set(vcpu))
+			tmr = TIMER_HVTIMER;
+		else
+			tmr = TIMER_VTIMER;
+		treg = TIMER_REG_CVAL;
+		break;
+
 	case SYS_AARCH32_CNTP_CVAL:
+	case SYS_CNTP_CVAL_EL02:
 		tmr = TIMER_PTIMER;
 		treg = TIMER_REG_CVAL;
 		break;
+
+	case SYS_CNTV_CVAL_EL02:
+		tmr = TIMER_VTIMER;
+		treg = TIMER_REG_CVAL;
+		break;
+
+	case SYS_CNTHP_CVAL_EL2:
+		tmr = TIMER_HPTIMER;
+		treg = TIMER_REG_CVAL;
+		break;
+
+	case SYS_CNTHV_CVAL_EL2:
+		tmr = TIMER_HVTIMER;
+		treg = TIMER_REG_CVAL;
+		break;
+
 	case SYS_CNTPCT_EL0:
 	case SYS_CNTPCTSS_EL0:
+		if (is_hyp_ctxt(vcpu))
+			tmr = TIMER_HPTIMER;
+		else
+			tmr = TIMER_PTIMER;
+		treg = TIMER_REG_CNT;
+		break;
+
 	case SYS_AARCH32_CNTPCT:
 		tmr = TIMER_PTIMER;
 		treg = TIMER_REG_CNT;
 		break;
+
 	default:
 		print_sys_reg_msg(p, "%s", "Unhandled trapped timer register");
 		kvm_inject_undefined(vcpu);
@@ -2640,6 +2744,10 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	{ SYS_DESC(SYS_CNTP_CTL_EL0), access_arch_timer },
 	{ SYS_DESC(SYS_CNTP_CVAL_EL0), access_arch_timer },
 
+	{ SYS_DESC(SYS_CNTV_TVAL_EL0), access_arch_timer },
+	{ SYS_DESC(SYS_CNTV_CTL_EL0), access_arch_timer },
+	{ SYS_DESC(SYS_CNTV_CVAL_EL0), access_arch_timer },
+
 	/* PMEVCNTRn_EL0 */
 	PMU_PMEVCNTR_EL0(0),
 	PMU_PMEVCNTR_EL0(1),
@@ -2771,9 +2879,24 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 
 	EL2_REG_VNCR(CNTVOFF_EL2, reset_val, 0),
 	EL2_REG(CNTHCTL_EL2, access_rw, reset_val, 0),
+	{ SYS_DESC(SYS_CNTHP_TVAL_EL2), access_arch_timer },
+	EL2_REG(CNTHP_CTL_EL2, access_arch_timer, reset_val, 0),
+	EL2_REG(CNTHP_CVAL_EL2, access_arch_timer, reset_val, 0),
+
+	{ SYS_DESC(SYS_CNTHV_TVAL_EL2), access_arch_timer },
+	EL2_REG(CNTHV_CTL_EL2, access_arch_timer, reset_val, 0),
+	EL2_REG(CNTHV_CVAL_EL2, access_arch_timer, reset_val, 0),
 
 	EL12_REG(CNTKCTL, access_rw, reset_val, 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 },
+
 	EL2_REG(SP_EL2, NULL, reset_unknown, 0),
 };
 
-- 
2.39.2


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  parent reply	other threads:[~2023-11-20 14:16 UTC|newest]

Thread overview: 79+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-20 13:09 [PATCH v11 00/43] KVM: arm64: Nested Virtualization support (FEAT_NV2 only) Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 01/43] arm64: cpufeatures: Restrict NV support to FEAT_NV2 Marc Zyngier
2023-11-21  9:07   ` Ganapatrao Kulkarni
2023-11-21  9:27     ` Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 02/43] KVM: arm64: nv: Hoist vcpu_has_nv() into is_hyp_ctxt() Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 03/43] KVM: arm64: nv: Compute NV view of idregs as a one-off Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 04/43] KVM: arm64: nv: Drop EL12 register traps that are redirected to VNCR Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 05/43] KVM: arm64: nv: Add non-VHE-EL2->EL1 translation helpers Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 06/43] KVM: arm64: nv: Add include containing the VNCR_EL2 offsets Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 07/43] KVM: arm64: Introduce a bad_trap() primitive for unexpected trap handling Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 08/43] KVM: arm64: nv: Add EL2_REG_VNCR()/EL2_REG_REDIR() sysreg helpers Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 09/43] KVM: arm64: nv: Map VNCR-capable registers to a separate page Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 10/43] KVM: arm64: nv: Handle virtual EL2 registers in vcpu_read/write_sys_reg() Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 11/43] KVM: arm64: nv: Handle HCR_EL2.E2H specially Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 12/43] KVM: arm64: nv: Handle CNTHCTL_EL2 specially Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 13/43] KVM: arm64: nv: Save/Restore vEL2 sysregs Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 14/43] KVM: arm64: nv: Respect virtual HCR_EL2.TWX setting Marc Zyngier
2023-11-20 13:09 ` [PATCH v11 15/43] KVM: arm64: nv: Respect virtual CPTR_EL2.{TFP,FPEN} settings Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 16/43] KVM: arm64: nv: Configure HCR_EL2 for FEAT_NV2 Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 17/43] KVM: arm64: nv: Support multiple nested Stage-2 mmu structures Marc Zyngier
2024-01-23  9:55   ` Ganapatrao Kulkarni
2024-01-23 14:26     ` Marc Zyngier
2024-01-25  8:14       ` Ganapatrao Kulkarni
2024-01-25  8:58         ` Marc Zyngier
2024-01-31  9:39           ` Ganapatrao Kulkarni
2024-01-31 13:50             ` Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 18/43] KVM: arm64: nv: Implement nested Stage-2 page table walk logic Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 19/43] KVM: arm64: nv: Handle shadow stage 2 page faults Marc Zyngier
2024-01-17 14:53   ` Joey Gouly
2024-01-17 15:53     ` Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 20/43] KVM: arm64: nv: Restrict S2 RD/WR permissions to match the guest's Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 21/43] KVM: arm64: nv: Unmap/flush shadow stage 2 page tables Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 22/43] KVM: arm64: nv: Set a handler for the system instruction traps Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 23/43] KVM: arm64: nv: Trap and emulate AT instructions from virtual EL2 Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 24/43] KVM: arm64: nv: Trap and emulate TLBI " Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 25/43] KVM: arm64: nv: Hide RAS from nested guests Marc Zyngier
2023-11-20 13:10 ` Marc Zyngier [this message]
2023-11-20 13:10 ` [PATCH v11 27/43] KVM: arm64: nv: Sync nested timer state with FEAT_NV2 Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 28/43] KVM: arm64: nv: Publish emulated timer interrupt state in the in-memory state Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 29/43] KVM: arm64: nv: Load timer before the GIC Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 30/43] KVM: arm64: nv: Nested GICv3 Support Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 31/43] KVM: arm64: nv: Don't block in WFI from nested state Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 32/43] KVM: arm64: nv: vgic: Allow userland to set VGIC maintenance IRQ Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 33/43] KVM: arm64: nv: Fold GICv3 host trapping requirements into guest setup Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 34/43] KVM: arm64: nv: Deal with broken VGIC on maintenance interrupt delivery Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 35/43] KVM: arm64: nv: Add handling of FEAT_TTL TLB invalidation Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 36/43] KVM: arm64: nv: Invalidate TLBs based on shadow S2 TTL-like information Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 37/43] KVM: arm64: nv: Tag shadow S2 entries with nested level Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 38/43] KVM: arm64: nv: Allocate VNCR page when required Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 39/43] KVM: arm64: nv: Fast-track 'InHost' exception returns Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 40/43] KVM: arm64: nv: Fast-track EL1 TLBIs for VHE guests Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 41/43] KVM: arm64: nv: Use FEAT_ECV to trap access to EL0 timers Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 42/43] KVM: arm64: nv: Accelerate EL0 timer read accesses when FEAT_ECV is on Marc Zyngier
2023-11-20 13:10 ` [PATCH v11 43/43] KVM: arm64: nv: Allow userspace to request KVM_ARM_VCPU_NESTED_VIRT Marc Zyngier
2023-11-21  8:51 ` [PATCH v11 00/43] KVM: arm64: Nested Virtualization support (FEAT_NV2 only) Ganapatrao Kulkarni
2023-11-21  9:08   ` Marc Zyngier
2023-11-21  9:26     ` Ganapatrao Kulkarni
2023-11-21  9:41       ` Marc Zyngier
2023-11-22 11:10         ` Ganapatrao Kulkarni
2023-11-22 11:39           ` Marc Zyngier
2023-11-21 16:49 ` Miguel Luis
2023-11-21 19:02   ` Marc Zyngier
2023-11-23 16:21     ` Miguel Luis
2023-11-23 16:44       ` Marc Zyngier
2023-11-24  9:50         ` Ganapatrao Kulkarni
2023-11-24 10:19           ` Marc Zyngier
2023-11-24 12:34             ` Ganapatrao Kulkarni
2023-11-24 12:51               ` Marc Zyngier
2023-11-24 13:22                 ` Ganapatrao Kulkarni
2023-11-24 14:32                   ` Marc Zyngier
2023-11-27  7:26                     ` Ganapatrao Kulkarni
2023-11-27  9:22                       ` Marc Zyngier
2023-11-27 10:59                         ` Ganapatrao Kulkarni
2023-11-27 11:45                           ` Marc Zyngier
2023-11-27 12:18                             ` Ganapatrao Kulkarni
2023-11-27 13:57                               ` Marc Zyngier
2023-12-18 12:39 ` Marc Zyngier
2023-12-18 19:51   ` Oliver Upton
2023-12-19 10:32 ` (subset) " Marc Zyngier

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