linux-kernel - [PATCH 45/47] KVM: arm64: nv: Add FEAT_FGT2 registers access from virtual EL2

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Message-Id: <20241001024356.1096072-46-anshuman.khandual@arm.com>
Date: Tue,  1 Oct 2024 08:13:54 +0530
From: Anshuman Khandual <anshuman.khandual@....com>
To: linux-kernel@...r.kernel.org,
	kvmarm@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org,
	maz@...nel.org
Cc: Anshuman Khandual <anshuman.khandual@....com>,
	Oliver Upton <oliver.upton@...ux.dev>,
	James Morse <james.morse@....com>,
	Suzuki K Poulose <suzuki.poulose@....com>,
	Catalin Marinas <catalin.marinas@....com>,
	Will Deacon <will@...nel.org>,
	Mark Brown <broonie@...nel.org>
Subject: [PATCH 45/47] KVM: arm64: nv: Add FEAT_FGT2 registers access from virtual EL2

This adds VNCR-capable HDFGRTR2_EL2, HDFGWTR2_EL2, HFGRTR2_EL2, HFGWTR2_EL2
and HFGITR2_EL2 FEAT_FGT2 registers into enum vcpu_sysreg, and also enables
their access from virtual EL2 environment.

Cc: Marc Zyngier <maz@...nel.org>
Cc: Oliver Upton <oliver.upton@...ux.dev>
Cc: James Morse <james.morse@....com>
Cc: Suzuki K Poulose <suzuki.poulose@....com>
Cc: linux-arm-kernel@...ts.infradead.org
Cc: kvmarm@...ts.linux.dev
Cc: linux-kernel@...r.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@....com>
---
 arch/arm64/include/asm/kvm_host.h     | 5 +++++
 arch/arm64/include/asm/vncr_mapping.h | 5 +++++
 arch/arm64/kvm/sys_regs.c             | 5 +++++
 3 files changed, 15 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index 329619c6fa96..09291e1e42c9 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -532,6 +532,11 @@ enum vcpu_sysreg {
 	VNCR(HDFGWTR_EL2),
 	VNCR(HAFGRTR_EL2),
 
+	VNCR(HDFGRTR2_EL2),
+	VNCR(HDFGWTR2_EL2),
+	VNCR(HFGITR2_EL2),
+	VNCR(HFGRTR2_EL2),
+	VNCR(HFGWTR2_EL2),
 	VNCR(CNTVOFF_EL2),
 	VNCR(CNTV_CVAL_EL0),
 	VNCR(CNTV_CTL_EL0),
diff --git a/arch/arm64/include/asm/vncr_mapping.h b/arch/arm64/include/asm/vncr_mapping.h
index 06f8ec0906a6..8eab837196d0 100644
--- a/arch/arm64/include/asm/vncr_mapping.h
+++ b/arch/arm64/include/asm/vncr_mapping.h
@@ -38,6 +38,8 @@
 #define VNCR_HFGRTR_EL2		0x1B8
 #define VNCR_HFGWTR_EL2		0x1C0
 #define VNCR_HFGITR_EL2		0x1C8
+#define VNCR_HDFGRTR2_EL2	0x1A0
+#define VNCR_HDFGWTR2_EL2	0x1B0
 #define VNCR_HDFGRTR_EL2	0x1D0
 #define VNCR_HDFGWTR_EL2	0x1D8
 #define VNCR_ZCR_EL1            0x1E0
@@ -53,6 +55,9 @@
 #define VNCR_PIRE0_EL2		0x298
 #define VNCR_PIR_EL1		0x2A0
 #define VNCR_POR_EL1		0x2A8
+#define VNCR_HFGRTR2_EL2	0x2C0
+#define VNCR_HFGWTR2_EL2	0x2C8
+#define VNCR_HFGITR2_EL2	0x310
 #define VNCR_ICH_LR0_EL2        0x400
 #define VNCR_ICH_LR1_EL2        0x408
 #define VNCR_ICH_LR2_EL2        0x410
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index dad88e31f953..778731491f79 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2794,9 +2794,14 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	EL2_REG_VNCR(VTCR_EL2, reset_val, 0),
 
 	{ SYS_DESC(SYS_DACR32_EL2), undef_access, reset_unknown, DACR32_EL2 },
+	EL2_REG_VNCR(HDFGRTR2_EL2, reset_val, 0),
+	EL2_REG_VNCR(HDFGWTR2_EL2, reset_val, 0),
+	EL2_REG_VNCR(HFGRTR2_EL2, reset_val, 0),
+	EL2_REG_VNCR(HFGWTR2_EL2, reset_val, 0),
 	EL2_REG_VNCR(HDFGRTR_EL2, reset_val, 0),
 	EL2_REG_VNCR(HDFGWTR_EL2, reset_val, 0),
 	EL2_REG_VNCR(HAFGRTR_EL2, reset_val, 0),
+	EL2_REG_VNCR(HFGITR2_EL2, reset_val, 0),
 	EL2_REG_REDIR(SPSR_EL2, reset_val, 0),
 	EL2_REG_REDIR(ELR_EL2, reset_val, 0),
 	{ SYS_DESC(SYS_SP_EL1), access_sp_el1},
-- 
2.25.1