linux-kernel - [PATCH v2 02/10] RISC-V: KVM: Add IMSIC related defines

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Message-Id: <20230612053932.58604-3-apatel@ventanamicro.com>
Date:   Mon, 12 Jun 2023 11:09:24 +0530
From:   Anup Patel <apatel@...tanamicro.com>
To:     Paolo Bonzini <pbonzini@...hat.com>,
        Atish Patra <atishp@...shpatra.org>
Cc:     Palmer Dabbelt <palmer@...belt.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Andrew Jones <ajones@...tanamicro.com>, kvm@...r.kernel.org,
        kvm-riscv@...ts.infradead.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, Anup Patel <apatel@...tanamicro.com>,
        Atish Patra <atishp@...osinc.com>
Subject: [PATCH v2 02/10] RISC-V: KVM: Add IMSIC related defines

We add IMSIC related defines in a separate header so that different
parts of KVM code can share it. Once AIA drivers are merged will
have a common IMSIC header shared by both KVM and IRQCHIP driver.

Signed-off-by: Anup Patel <apatel@...tanamicro.com>
Reviewed-by: Atish Patra <atishp@...osinc.com>
---
 arch/riscv/include/asm/kvm_aia_imsic.h | 38 ++++++++++++++++++++++++++
 arch/riscv/kvm/aia.c                   |  3 +-
 2 files changed, 39 insertions(+), 2 deletions(-)
 create mode 100644 arch/riscv/include/asm/kvm_aia_imsic.h

diff --git a/arch/riscv/include/asm/kvm_aia_imsic.h b/arch/riscv/include/asm/kvm_aia_imsic.h
new file mode 100644
index 000000000000..da5881d2bde0
--- /dev/null
+++ b/arch/riscv/include/asm/kvm_aia_imsic.h
@@ -0,0 +1,38 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (C) 2021 Western Digital Corporation or its affiliates.
+ * Copyright (C) 2022 Ventana Micro Systems Inc.
+ */
+#ifndef __KVM_RISCV_AIA_IMSIC_H
+#define __KVM_RISCV_AIA_IMSIC_H
+
+#include <linux/types.h>
+#include <asm/csr.h>
+
+#define IMSIC_MMIO_PAGE_SHIFT		12
+#define IMSIC_MMIO_PAGE_SZ		(1UL << IMSIC_MMIO_PAGE_SHIFT)
+#define IMSIC_MMIO_PAGE_LE		0x00
+#define IMSIC_MMIO_PAGE_BE		0x04
+
+#define IMSIC_MIN_ID			63
+#define IMSIC_MAX_ID			2048
+
+#define IMSIC_EIDELIVERY		0x70
+
+#define IMSIC_EITHRESHOLD		0x72
+
+#define IMSIC_EIP0			0x80
+#define IMSIC_EIP63			0xbf
+#define IMSIC_EIPx_BITS			32
+
+#define IMSIC_EIE0			0xc0
+#define IMSIC_EIE63			0xff
+#define IMSIC_EIEx_BITS			32
+
+#define IMSIC_FIRST			IMSIC_EIDELIVERY
+#define IMSIC_LAST			IMSIC_EIE63
+
+#define IMSIC_MMIO_SETIPNUM_LE		0x00
+#define IMSIC_MMIO_SETIPNUM_BE		0x04
+
+#endif
diff --git a/arch/riscv/kvm/aia.c b/arch/riscv/kvm/aia.c
index 1cee75a8c883..c78c06d99e39 100644
--- a/arch/riscv/kvm/aia.c
+++ b/arch/riscv/kvm/aia.c
@@ -15,6 +15,7 @@
 #include <linux/percpu.h>
 #include <linux/spinlock.h>
 #include <asm/hwcap.h>
+#include <asm/kvm_aia_imsic.h>
 
 struct aia_hgei_control {
 	raw_spinlock_t lock;
@@ -364,8 +365,6 @@ static int aia_rmw_iprio(struct kvm_vcpu *vcpu, unsigned int isel,
 	return KVM_INSN_CONTINUE_NEXT_SEPC;
 }
 
-#define IMSIC_FIRST	0x70
-#define IMSIC_LAST	0xff
 int kvm_riscv_vcpu_aia_rmw_ireg(struct kvm_vcpu *vcpu, unsigned int csr_num,
 				unsigned long *val, unsigned long new_val,
 				unsigned long wr_mask)
-- 
2.34.1