From: Yifei Jiang <jiangyifei@huawei.com>
To: <qemu-devel@nongnu.org>, <qemu-riscv@nongnu.org>
Cc: <kvm-riscv@lists.infradead.org>, <kvm@vger.kernel.org>,
<libvir-list@redhat.com>, <anup.patel@wdc.com>,
<palmer@dabbelt.com>, <Alistair.Francis@wdc.com>,
<sagark@eecs.berkeley.edu>, <kbastian@mail.uni-paderborn.de>,
<bin.meng@windriver.com>, <fanliang@huawei.com>,
<wu.wubin@huawei.com>, <zhang.zhanghailiang@huawei.com>,
<yinyipeng1@huawei.com>, Yifei Jiang <jiangyifei@huawei.com>
Subject: [PATCH RFC v5 08/12] target/riscv: Handle KVM_EXIT_RISCV_SBI exit
Date: Mon, 12 Apr 2021 14:52:42 +0800 [thread overview]
Message-ID: <20210412065246.1853-9-jiangyifei@huawei.com> (raw)
In-Reply-To: <20210412065246.1853-1-jiangyifei@huawei.com>
Use char-fe to handle console sbi call, which implement early
console io while apply 'earlycon=sbi' into kernel parameters.
Signed-off-by: Yifei Jiang <jiangyifei@huawei.com>
Signed-off-by: Yipeng Yin <yinyipeng1@huawei.com>
---
target/riscv/kvm.c | 42 ++++++++++++++++-
target/riscv/sbi_ecall_interface.h | 72 ++++++++++++++++++++++++++++++
2 files changed, 113 insertions(+), 1 deletion(-)
create mode 100644 target/riscv/sbi_ecall_interface.h
diff --git a/target/riscv/kvm.c b/target/riscv/kvm.c
index da63535812..f9707157e7 100644
--- a/target/riscv/kvm.c
+++ b/target/riscv/kvm.c
@@ -38,6 +38,8 @@
#include "qemu/log.h"
#include "hw/loader.h"
#include "kvm_riscv.h"
+#include "sbi_ecall_interface.h"
+#include "chardev/char-fe.h"
static __u64 kvm_riscv_reg_id(CPURISCVState *env, __u64 type, __u64 idx)
{
@@ -436,9 +438,47 @@ bool kvm_arch_stop_on_emulation_error(CPUState *cs)
return true;
}
+static int kvm_riscv_handle_sbi(struct kvm_run *run)
+{
+ int ret = 0;
+ unsigned char ch;
+ switch (run->riscv_sbi.extension_id) {
+ case SBI_EXT_0_1_CONSOLE_PUTCHAR:
+ ch = run->riscv_sbi.args[0];
+ qemu_chr_fe_write(serial_hd(0)->be, &ch, sizeof(ch));
+ break;
+ case SBI_EXT_0_1_CONSOLE_GETCHAR:
+ ret = qemu_chr_fe_read_all(serial_hd(0)->be, &ch, sizeof(ch));
+ if (ret == sizeof(ch)) {
+ run->riscv_sbi.args[0] = ch;
+ } else {
+ run->riscv_sbi.args[0] = -1;
+ }
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP,
+ "%s: un-handled SBI EXIT, specific reasons is %lu\n",
+ __func__, run->riscv_sbi.extension_id);
+ ret = -1;
+ break;
+ }
+ return ret;
+}
+
int kvm_arch_handle_exit(CPUState *cs, struct kvm_run *run)
{
- return 0;
+ int ret = 0;
+ switch (run->exit_reason) {
+ case KVM_EXIT_RISCV_SBI:
+ ret = kvm_riscv_handle_sbi(run);
+ break;
+ default:
+ qemu_log_mask(LOG_UNIMP, "%s: un-handled exit reason %d\n",
+ __func__, run->exit_reason);
+ ret = -1;
+ break;
+ }
+ return ret;
}
void kvm_riscv_reset_vcpu(RISCVCPU *cpu)
diff --git a/target/riscv/sbi_ecall_interface.h b/target/riscv/sbi_ecall_interface.h
new file mode 100644
index 0000000000..fb1a3fa8f2
--- /dev/null
+++ b/target/riscv/sbi_ecall_interface.h
@@ -0,0 +1,72 @@
+/*
+ * SPDX-License-Identifier: BSD-2-Clause
+ *
+ * Copyright (c) 2019 Western Digital Corporation or its affiliates.
+ *
+ * Authors:
+ * Anup Patel <anup.patel@wdc.com>
+ */
+
+#ifndef __SBI_ECALL_INTERFACE_H__
+#define __SBI_ECALL_INTERFACE_H__
+
+/* clang-format off */
+
+/* SBI Extension IDs */
+#define SBI_EXT_0_1_SET_TIMER 0x0
+#define SBI_EXT_0_1_CONSOLE_PUTCHAR 0x1
+#define SBI_EXT_0_1_CONSOLE_GETCHAR 0x2
+#define SBI_EXT_0_1_CLEAR_IPI 0x3
+#define SBI_EXT_0_1_SEND_IPI 0x4
+#define SBI_EXT_0_1_REMOTE_FENCE_I 0x5
+#define SBI_EXT_0_1_REMOTE_SFENCE_VMA 0x6
+#define SBI_EXT_0_1_REMOTE_SFENCE_VMA_ASID 0x7
+#define SBI_EXT_0_1_SHUTDOWN 0x8
+#define SBI_EXT_BASE 0x10
+#define SBI_EXT_TIME 0x54494D45
+#define SBI_EXT_IPI 0x735049
+#define SBI_EXT_RFENCE 0x52464E43
+#define SBI_EXT_HSM 0x48534D
+
+/* SBI function IDs for BASE extension*/
+#define SBI_EXT_BASE_GET_SPEC_VERSION 0x0
+#define SBI_EXT_BASE_GET_IMP_ID 0x1
+#define SBI_EXT_BASE_GET_IMP_VERSION 0x2
+#define SBI_EXT_BASE_PROBE_EXT 0x3
+#define SBI_EXT_BASE_GET_MVENDORID 0x4
+#define SBI_EXT_BASE_GET_MARCHID 0x5
+#define SBI_EXT_BASE_GET_MIMPID 0x6
+
+/* SBI function IDs for TIME extension*/
+#define SBI_EXT_TIME_SET_TIMER 0x0
+
+/* SBI function IDs for IPI extension*/
+#define SBI_EXT_IPI_SEND_IPI 0x0
+
+/* SBI function IDs for RFENCE extension*/
+#define SBI_EXT_RFENCE_REMOTE_FENCE_I 0x0
+#define SBI_EXT_RFENCE_REMOTE_SFENCE_VMA 0x1
+#define SBI_EXT_RFENCE_REMOTE_SFENCE_VMA_ASID 0x2
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA 0x3
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_GVMA_VMID 0x4
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA 0x5
+#define SBI_EXT_RFENCE_REMOTE_HFENCE_VVMA_ASID 0x6
+
+/* SBI function IDs for HSM extension */
+#define SBI_EXT_HSM_HART_START 0x0
+#define SBI_EXT_HSM_HART_STOP 0x1
+#define SBI_EXT_HSM_HART_GET_STATUS 0x2
+
+#define SBI_HSM_HART_STATUS_STARTED 0x0
+#define SBI_HSM_HART_STATUS_STOPPED 0x1
+#define SBI_HSM_HART_STATUS_START_PENDING 0x2
+#define SBI_HSM_HART_STATUS_STOP_PENDING 0x3
+
+#define SBI_SPEC_VERSION_MAJOR_OFFSET 24
+#define SBI_SPEC_VERSION_MAJOR_MASK 0x7f
+#define SBI_SPEC_VERSION_MINOR_MASK 0xffffff
+#define SBI_EXT_VENDOR_START 0x09000000
+#define SBI_EXT_VENDOR_END 0x09FFFFFF
+/* clang-format on */
+
+#endif
--
2.19.1
next prev parent reply other threads:[~2021-04-12 6:53 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-12 6:52 [PATCH RFC v5 00/12] Add riscv kvm accel support Yifei Jiang
2021-04-12 6:52 ` [PATCH RFC v5 01/12] linux-header: Update linux/kvm.h Yifei Jiang
2021-04-12 6:52 ` [PATCH RFC v5 02/12] target/riscv: Add target/riscv/kvm.c to place the public kvm interface Yifei Jiang
2021-04-12 6:52 ` [PATCH RFC v5 03/12] target/riscv: Implement function kvm_arch_init_vcpu Yifei Jiang
2021-04-14 22:32 ` Alistair Francis
2021-04-12 6:52 ` [PATCH RFC v5 04/12] target/riscv: Implement kvm_arch_get_registers Yifei Jiang
2021-04-14 22:39 ` Alistair Francis
2021-04-12 6:52 ` [PATCH RFC v5 05/12] target/riscv: Implement kvm_arch_put_registers Yifei Jiang
2021-04-14 22:46 ` Alistair Francis
2021-04-12 6:52 ` [PATCH RFC v5 06/12] target/riscv: Support start kernel directly by KVM Yifei Jiang
2021-04-14 22:48 ` Alistair Francis
2021-04-12 6:52 ` [PATCH RFC v5 07/12] hw/riscv: PLIC update external interrupt by KVM when kvm enabled Yifei Jiang
2021-04-14 22:50 ` Alistair Francis
2021-04-30 4:53 ` Anup Patel
2021-05-06 7:59 ` Jiangyifei
2021-04-12 6:52 ` Yifei Jiang [this message]
2021-04-12 6:52 ` [PATCH RFC v5 09/12] target/riscv: Add host cpu type Yifei Jiang
2021-04-14 22:33 ` Alistair Francis
2021-04-12 6:52 ` [PATCH RFC v5 10/12] target/riscv: Add kvm_riscv_get/put_regs_timer Yifei Jiang
2021-04-12 6:52 ` [PATCH RFC v5 11/12] target/riscv: Implement virtual time adjusting with vm state changing Yifei Jiang
2021-04-12 6:52 ` [PATCH RFC v5 12/12] target/riscv: Support virtual time context synchronization Yifei Jiang
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