[PATCH v1 06/20] KVM: arm64: Save/restore POE registers

From: Joey Gouly <joey.gouly@arm.com>
To: <linux-arm-kernel@lists.infradead.org>
Cc: <nd@arm.com>, <akpm@linux-foundation.org>,
	<aneesh.kumar@linux.ibm.com>, <catalin.marinas@arm.com>,
	<dave.hansen@linux.intel.com>, <joey.gouly@arm.com>,
	<maz@kernel.org>, <oliver.upton@linux.dev>, <shuah@kernel.org>,
	<will@kernel.org>, <kvmarm@lists.linux.dev>,
	<linux-fsdevel@vger.kernel.org>, <linux-mm@kvack.org>,
	<linux-kselftest@vger.kernel.org>
Subject: [PATCH v1 06/20] KVM: arm64: Save/restore POE registers
Date: Wed, 27 Sep 2023 15:01:09 +0100	[thread overview]
Message-ID: <20230927140123.5283-7-joey.gouly@arm.com> (raw)
In-Reply-To: <20230927140123.5283-1-joey.gouly@arm.com>

Define the new system registers that POE introduces and context switch them.

Signed-off-by: Joey Gouly <joey.gouly@arm.com>
Cc: Marc Zyngier <maz@kernel.org>
Cc: Oliver Upton <oliver.upton@linux.dev>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will@kernel.org>
---
 arch/arm64/include/asm/kvm_host.h | 4 ++++
 arch/arm64/kvm/sys_regs.c         | 2 ++
 2 files changed, 6 insertions(+)

diff --git a/arch/arm64/include/asm/kvm_host.h b/arch/arm64/include/asm/kvm_host.h
index af06ccb7ee34..205653bc5c2c 100644
--- a/arch/arm64/include/asm/kvm_host.h
+++ b/arch/arm64/include/asm/kvm_host.h
@@ -365,6 +365,10 @@ enum vcpu_sysreg {
 	PIR_EL1,       /* Permission Indirection Register 1 (EL1) */
 	PIRE0_EL1,     /*  Permission Indirection Register 0 (EL1) */
 
+	/* Permission Overlay Extension registers */
+	POR_EL1,	/* Permission Overlay Register 1 (EL1) */
+	POR_EL0,	/* Permission Overlay Register 0 (EL0) */
+
 	/* 32bit specific registers. */
 	DACR32_EL2,	/* Domain Access Control Register */
 	IFSR32_EL2,	/* Instruction Fault Status Register */
diff --git a/arch/arm64/kvm/sys_regs.c b/arch/arm64/kvm/sys_regs.c
index e92ec810d449..dbaddadd2a1c 100644
--- a/arch/arm64/kvm/sys_regs.c
+++ b/arch/arm64/kvm/sys_regs.c
@@ -2124,6 +2124,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	{ SYS_DESC(SYS_MAIR_EL1), access_vm_reg, reset_unknown, MAIR_EL1 },
 	{ SYS_DESC(SYS_PIRE0_EL1), access_vm_reg, reset_unknown, PIRE0_EL1 },
 	{ SYS_DESC(SYS_PIR_EL1), access_vm_reg, reset_unknown, PIR_EL1 },
+	{ SYS_DESC(SYS_POR_EL1), access_vm_reg, reset_unknown, POR_EL1 },
 	{ SYS_DESC(SYS_AMAIR_EL1), access_vm_reg, reset_amair_el1, AMAIR_EL1 },
 
 	{ SYS_DESC(SYS_LORSA_EL1), trap_loregion },
@@ -2203,6 +2204,7 @@ static const struct sys_reg_desc sys_reg_descs[] = {
 	{ PMU_SYS_REG(PMOVSSET_EL0),
 	  .access = access_pmovs, .reg = PMOVSSET_EL0 },
 
+	{ SYS_DESC(SYS_POR_EL0), access_vm_reg, reset_unknown, POR_EL0 },
 	{ SYS_DESC(SYS_TPIDR_EL0), NULL, reset_unknown, TPIDR_EL0 },
 	{ SYS_DESC(SYS_TPIDRRO_EL0), NULL, reset_unknown, TPIDRRO_EL0 },
 	{ SYS_DESC(SYS_TPIDR2_EL0), undef_access },
-- 
2.25.1

