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Re: [PATCH v7 1/2] hw/misc/riscv_iopmp: Add RISC-V IOPMP device
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From: |
Ethan Chen |
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Subject: |
Re: [PATCH v7 1/2] hw/misc/riscv_iopmp: Add RISC-V IOPMP device |
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Date: |
Fri, 14 Jun 2024 09:46:34 +0800 |
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User-agent: |
Mutt/2.1.4 (2021-12-11) |
On Thu, Jun 13, 2024 at 05:26:03PM +0800, LIU Zhiwei wrote:
>
> Hi Ethan,
>
> On 2024/6/12 11:17, Ethan Chen wrote:
> > Support basic functions of IOPMP specification v0.9.1 rapid-k model.
> > The specification url:
> > https://github.com/riscv-non-isa/iopmp-spec/releases/tag/v0.9.1
> >
> > IOPMP check memory access from device is valid or not. This implementation
> > uses
> > IOMMU to change address space that device access. There are three possible
> > results of an access: valid, blocked, and stalled(stall is not supported in
> > this
> > patch).
> >
> > If an access is valid, target address space is downstream_as.
> > If an access is blocked, it will go to blocked_io_as. The operation of
> > blocked_io_as could be a bus error, or it can respond a success with
> > fabricated
> > data depending on IOPMP ERR_CFG register value.
> >
> > Signed-off-by: Ethan Chen <ethan84@andestech.com>
> > ---
> > hw/misc/Kconfig | 3 +
> > hw/misc/meson.build | 1 +
> > hw/misc/riscv_iopmp.c | 1002 +++++++++++++++++++++++++++++++++
> > hw/misc/trace-events | 4 +
> > include/hw/misc/riscv_iopmp.h | 152 +++++
> > 5 files changed, 1162 insertions(+)
> > create mode 100644 hw/misc/riscv_iopmp.c
> > create mode 100644 include/hw/misc/riscv_iopmp.h
> >
> > diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig
> > index 1e08785b83..427f0c702e 100644
> > --- a/hw/misc/Kconfig
> > +++ b/hw/misc/Kconfig
> > @@ -213,4 +213,7 @@ config IOSB
> > config XLNX_VERSAL_TRNG
> > bool
> >
> > +config RISCV_IOPMP
> > + bool
> > +
> > source macio/Kconfig
> > diff --git a/hw/misc/meson.build b/hw/misc/meson.build
> > index 86596a3888..f83cd108f8 100644
> > --- a/hw/misc/meson.build
> > +++ b/hw/misc/meson.build
> > @@ -34,6 +34,7 @@ system_ss.add(when: 'CONFIG_SIFIVE_E_PRCI', if_true:
> > files('sifive_e_prci.c'))
> > system_ss.add(when: 'CONFIG_SIFIVE_E_AON', if_true:
> > files('sifive_e_aon.c'))
> > system_ss.add(when: 'CONFIG_SIFIVE_U_OTP', if_true:
> > files('sifive_u_otp.c'))
> > system_ss.add(when: 'CONFIG_SIFIVE_U_PRCI', if_true:
> > files('sifive_u_prci.c'))
> > +specific_ss.add(when: 'CONFIG_RISCV_IOPMP', if_true:
> > files('riscv_iopmp.c'))
> >
> > subdir('macio')
> >
> > diff --git a/hw/misc/riscv_iopmp.c b/hw/misc/riscv_iopmp.c
> > new file mode 100644
> > index 0000000000..75b28dc559
> > --- /dev/null
> > +++ b/hw/misc/riscv_iopmp.c
> > @@ -0,0 +1,1002 @@
> > +/*
> > + * QEMU RISC-V IOPMP (Input Output Physical Memory Protection)
> > + *
> > + * Copyright (c) 2023 Andes Tech. Corp.
> > + *
> > + * This program is free software; you can redistribute it and/or modify it
> > + * under the terms and conditions of the GNU General Public License,
> > + * version 2 or later, as published by the Free Software Foundation.
> > + *
> > + * This program is distributed in the hope it will be useful, but WITHOUT
> > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
> > for
> > + * more details.
> > + *
> > + * You should have received a copy of the GNU General Public License along
> > with
> > + * this program. If not, see <http://www.gnu.org/licenses/>.
> > + */
> > +
> > +#include "qemu/osdep.h"
> > +#include "qemu/log.h"
> > +#include "qapi/error.h"
> > +#include "trace.h"
> > +#include "exec/exec-all.h"
> > +#include "exec/address-spaces.h"
> > +#include "hw/qdev-properties.h"
> > +#include "hw/sysbus.h"
> > +#include "hw/misc/riscv_iopmp.h"
> > +#include "memory.h"
> > +#include "hw/irq.h"
> > +#include "hw/registerfields.h"
> > +#include "trace.h"
> > +
> > +#define TYPE_IOPMP_IOMMU_MEMORY_REGION "iopmp-iommu-memory-region"
> > +
> > +REG32(VERSION, 0x00)
> > + FIELD(VERSION, VENDOR, 0, 24)
> > + FIELD(VERSION, SPECVER , 24, 8)
> > +REG32(IMP, 0x04)
> > + FIELD(IMP, IMPID, 0, 32)
> > +REG32(HWCFG0, 0x08)
> > + FIELD(HWCFG0, MODEL, 0, 4)
> > + FIELD(HWCFG0, TOR_EN, 4, 1)
> > + FIELD(HWCFG0, SPS_EN, 5, 1)
> > + FIELD(HWCFG0, USER_CFG_EN, 6, 1)
> > + FIELD(HWCFG0, PRIENT_PROG, 7, 1)
> > + FIELD(HWCFG0, RRID_TRANSL_EN, 8, 1)
> > + FIELD(HWCFG0, RRID_TRANSL_PROG, 9, 1)
> > + FIELD(HWCFG0, CHK_X, 10, 1)
> > + FIELD(HWCFG0, NO_X, 11, 1)
> > + FIELD(HWCFG0, NO_W, 12, 1)
> > + FIELD(HWCFG0, STALL_EN, 13, 1)
> > + FIELD(HWCFG0, PEIS, 14, 1)
> > + FIELD(HWCFG0, PEES, 15, 1)
> > + FIELD(HWCFG0, MFR_EN, 16, 1)
> > + FIELD(HWCFG0, MD_NUM, 24, 7)
> > + FIELD(HWCFG0, ENABLE, 31, 1)
> > +REG32(HWCFG1, 0x0C)
> > + FIELD(HWCFG1, RRID_NUM, 0, 16)
> > + FIELD(HWCFG1, ENTRY_NUM, 16, 16)
> > +REG32(HWCFG2, 0x10)
> > + FIELD(HWCFG2, PRIO_ENTRY, 0, 16)
> > + FIELD(HWCFG2, RRID_TRANSL, 16, 16)
> > +REG32(ENTRYOFFSET, 0x14)
> > + FIELD(ENTRYOFFSET, OFFSET, 0, 32)
> > +REG32(MDSTALL, 0x30)
> > + FIELD(MDSTALL, EXEMPT, 0, 1)
> > + FIELD(MDSTALL, MD, 1, 31)
> > +REG32(MDSTALLH, 0x34)
> > + FIELD(MDSTALLH, MD, 0, 32)
> > +REG32(RRIDSCP, 0x38)
> > + FIELD(RRIDSCP, RRID, 0, 16)
> > + FIELD(RRIDSCP, OP, 30, 2)
> > +REG32(MDLCK, 0x40)
> > + FIELD(MDLCK, L, 0, 1)
> > + FIELD(MDLCK, MD, 1, 31)
> > +REG32(MDLCKH, 0x44)
> > + FIELD(MDLCKH, MDH, 0, 32)
> > +REG32(MDCFGLCK, 0x48)
> > + FIELD(MDCFGLCK, L, 0, 1)
> > + FIELD(MDCFGLCK, F, 1, 7)
> > +REG32(ENTRYLCK, 0x4C)
> > + FIELD(ENTRYLCK, L, 0, 1)
> > + FIELD(ENTRYLCK, F, 1, 16)
> > +REG32(ERR_CFG, 0x60)
> > + FIELD(ERR_CFG, L, 0, 1)
> > + FIELD(ERR_CFG, IE, 1, 1)
> > + FIELD(ERR_CFG, IRE, 2, 1)
> > + FIELD(ERR_CFG, IWE, 3, 1)
> > + FIELD(ERR_CFG, IXE, 4, 1)
> > + FIELD(ERR_CFG, RRE, 5, 1)
> > + FIELD(ERR_CFG, RWE, 6, 1)
> > + FIELD(ERR_CFG, RXE, 7, 1)
> > +REG32(ERR_REQINFO, 0x64)
> > + FIELD(ERR_REQINFO, V, 0, 1)
> > + FIELD(ERR_REQINFO, TTYPE, 1, 2)
> > + FIELD(ERR_REQINFO, ETYPE, 4, 3)
> > + FIELD(ERR_REQINFO, SVC, 7, 1)
> > +REG32(ERR_REQADDR, 0x68)
> > + FIELD(ERR_REQADDR, ADDR, 0, 32)
> > +REG32(ERR_REQADDRH, 0x6C)
> > + FIELD(ERR_REQADDRH, ADDRH, 0, 32)
> > +REG32(ERR_REQID, 0x70)
> > + FIELD(ERR_REQID, RRID, 0, 16)
> > + FIELD(ERR_REQID, EID, 16, 16)
> > +REG32(ERR_MFR, 0x74)
> > + FIELD(ERR_MFR, SVW, 0, 16)
> > + FIELD(ERR_MFR, SVI, 16, 12)
> > + FIELD(ERR_MFR, SVS, 31, 1)
> > +REG32(MDCFG0, 0x800)
> > + FIELD(MDCFG0, T, 0, 16)
> > +REG32(SRCMD_EN0, 0x1000)
> > + FIELD(SRCMD_EN0, L, 0, 1)
> > + FIELD(SRCMD_EN0, MD, 1, 31)
> > +REG32(SRCMD_ENH0, 0x1004)
> > + FIELD(SRCMD_ENH0, MDH, 0, 32)
> > +REG32(SRCMD_R0, 0x1008)
> > + FIELD(SRCMD_R0, MD, 1, 31)
> > +REG32(SRCMD_RH0, 0x100C)
> > + FIELD(SRCMD_RH0, MDH, 0, 32)
> > +REG32(SRCMD_W0, 0x1010)
> > + FIELD(SRCMD_W0, MD, 1, 31)
> > +REG32(SRCMD_WH0, 0x1014)
> > + FIELD(SRCMD_WH0, MDH, 0, 32)
> > +
> > +FIELD(ENTRY_ADDR, ADDR, 0, 32)
> > +FIELD(ENTRY_ADDRH, ADDRH, 0, 32)
> > +
> > +FIELD(ENTRY_CFG, R, 0, 1)
> > +FIELD(ENTRY_CFG, W, 1, 1)
> > +FIELD(ENTRY_CFG, X, 2, 1)
> > +FIELD(ENTRY_CFG, A, 3, 2)
> > +FIELD(ENTRY_CFG, SIRE, 5, 1)
> > +FIELD(ENTRY_CFG, SIWE, 6, 1)
> > +FIELD(ENTRY_CFG, SIXE, 7, 1)
> > +FIELD(ENTRY_CFG, SERE, 8, 1)
> > +FIELD(ENTRY_CFG, SEWE, 9, 1)
> > +FIELD(ENTRY_CFG, SEXE, 10, 1)
> > +
> > +FIELD(ENTRY_USER_CFG, IM, 0, 32)
> > +
> > +/* Offsets to SRCMD_EN(i) */
> > +#define SRCMD_EN_OFFSET 0x0
> > +#define SRCMD_ENH_OFFSET 0x4
> > +#define SRCMD_R_OFFSET 0x8
> > +#define SRCMD_RH_OFFSET 0xC
> > +#define SRCMD_W_OFFSET 0x10
> > +#define SRCMD_WH_OFFSET 0x14
> > +
> > +/* Offsets to ENTRY_ADDR(i) */
> > +#define ENTRY_ADDR_OFFSET 0x0
> > +#define ENTRY_ADDRH_OFFSET 0x4
> > +#define ENTRY_CFG_OFFSET 0x8
> > +#define ENTRY_USER_CFG_OFFSET 0xC
> > +
> > +static void iopmp_iommu_notify(IopmpState *s)
> > +{
> > + IOMMUTLBEvent event = {
> > + .entry = {
> > + .iova = 0,
> > + .translated_addr = 0,
> > + .addr_mask = -1ULL,
> > + .perm = IOMMU_NONE,
> > + },
> > + .type = IOMMU_NOTIFIER_UNMAP,
> > + };
> > +
> > + for (int i = 0; i < s->rrid_num; i++) {
> > + memory_region_notify_iommu(&s->iommu, i, event);
> > + }
> > +}
> > +
> > +static void iopmp_decode_napot(uint64_t a, uint64_t *sa,
> > + uint64_t *ea)
> > +{
> > + /*
> > + * aaaa...aaa0 8-byte NAPOT range
> > + * aaaa...aa01 16-byte NAPOT range
> > + * aaaa...a011 32-byte NAPOT range
> > + * ...
> > + * aa01...1111 2^XLEN-byte NAPOT range
> > + * a011...1111 2^(XLEN+1)-byte NAPOT range
> > + * 0111...1111 2^(XLEN+2)-byte NAPOT range
> > + * 1111...1111 Reserved
> > + */
> > +
> > + a = (a << 2) | 0x3;
> > + *sa = a & (a + 1);
> > + *ea = a | (a + 1);
> > +}
> > +
> > +static void iopmp_update_rule(IopmpState *s, uint32_t entry_index)
> > +{
> > + uint8_t this_cfg = s->regs.entry[entry_index].cfg_reg;
> > + uint64_t this_addr = s->regs.entry[entry_index].addr_reg |
> > + ((uint64_t)s->regs.entry[entry_index].addrh_reg
> > << 32);
> > + uint64_t prev_addr = 0u;
> > + uint64_t sa = 0u;
> > + uint64_t ea = 0u;
> > +
> > + if (entry_index >= 1u) {
> > + prev_addr = s->regs.entry[entry_index - 1].addr_reg |
> > + ((uint64_t)s->regs.entry[entry_index - 1].addrh_reg <<
> > 32);
> > + }
> > +
> > + switch (FIELD_EX32(this_cfg, ENTRY_CFG, A)) {
> > + case IOPMP_AMATCH_OFF:
> > + sa = 0u;
> > + ea = -1;
> > + break;
> > +
> > + case IOPMP_AMATCH_TOR:
> > + sa = (prev_addr) << 2; /* shift up from [xx:0] to [xx+2:2] */
> > + ea = ((this_addr) << 2) - 1u;
> > + if (sa > ea) {
> > + sa = ea = 0u;
> > + }
> > + break;
> > +
> > + case IOPMP_AMATCH_NA4:
> > + sa = this_addr << 2; /* shift up from [xx:0] to [xx+2:2] */
> > + ea = (sa + 4u) - 1u;
> > + break;
> > +
> > + case IOPMP_AMATCH_NAPOT:
> > + iopmp_decode_napot(this_addr, &sa, &ea);
> > + break;
> > +
> > + default:
> > + sa = 0u;
> > + ea = 0u;
> > + break;
> > + }
> > +
> > + s->entry_addr[entry_index].sa = sa;
> > + s->entry_addr[entry_index].ea = ea;
> > + iopmp_iommu_notify(s);
> > +}
> > +
> > +static uint64_t iopmp_read(void *opaque, hwaddr addr, unsigned size)
> > +{
> > + IopmpState *s = IOPMP(opaque);
> > + uint32_t rz = 0;
> > + uint32_t offset, idx;
> > +
> > + switch (addr) {
> > + case A_VERSION:
> > + rz = VENDER_VIRT << R_VERSION_VENDOR_SHIFT |
> > + SPECVER_0_9_1 << R_VERSION_SPECVER_SHIFT;
> > + break;
> > + case A_IMP:
> > + rz = IMPID_0_9_1;
> > + break;
> > + case A_HWCFG0:
> > + rz = s->model << R_HWCFG0_MODEL_SHIFT |
> > + 1 << R_HWCFG0_TOR_EN_SHIFT |
> > + 0 << R_HWCFG0_SPS_EN_SHIFT |
> > + 0 << R_HWCFG0_USER_CFG_EN_SHIFT |
> > + s->prient_prog << R_HWCFG0_PRIENT_PROG_SHIFT |
> > + s->rrid_transl_en << R_HWCFG0_RRID_TRANSL_EN_SHIFT |
> > + s->rrid_transl_prog << R_HWCFG0_RRID_TRANSL_PROG_SHIFT |
> > + 0 << R_HWCFG0_CHK_X_SHIFT |
> > + 0 << R_HWCFG0_NO_X_SHIFT |
> > + 0 << R_HWCFG0_NO_W_SHIFT |
> > + 0 << R_HWCFG0_STALL_EN_SHIFT |
> > + 0 << R_HWCFG0_PEIS_SHIFT |
> > + 0 << R_HWCFG0_PEES_SHIFT |
> > + 0 << R_HWCFG0_MFR_EN_SHIFT |
> > + s->md_num << R_HWCFG0_MD_NUM_SHIFT |
> > + s->enable << R_HWCFG0_ENABLE_SHIFT ;
> > + break;
> > + case A_HWCFG1:
> > + rz = s->rrid_num << R_HWCFG1_RRID_NUM_SHIFT |
> > + s->entry_num << R_HWCFG1_ENTRY_NUM_SHIFT;
> > + break;
> > + case A_HWCFG2:
> > + rz = s->prio_entry << R_HWCFG2_PRIO_ENTRY_SHIFT |
> > + s->rrid_transl << R_HWCFG2_RRID_TRANSL_SHIFT;
> > + break;
> > + case A_ENTRYOFFSET:
> > + rz = s->entry_offset;
> > + break;
> > + case A_ERR_CFG:
> > + rz = s->regs.err_cfg;
> > + break;
> > + case A_MDLCK:
> > + rz = s->regs.mdlck;
> > + break;
> > + case A_MDLCKH:
> > + rz = s->regs.mdlckh;
> > + break;
> > + case A_MDCFGLCK:
> > + rz = s->regs.mdcfglck;
> > + break;
> > + case A_ENTRYLCK:
> > + rz = s->regs.entrylck;
> > + break;
> > + case A_ERR_REQADDR:
> > + rz = s->regs.err_reqaddr & UINT32_MAX;
> > + break;
> > + case A_ERR_REQADDRH:
> > + rz = s->regs.err_reqaddr >> 32;
> > + break;
> > + case A_ERR_REQID:
> > + rz = s->regs.err_reqid;
> > + break;
> > + case A_ERR_REQINFO:
> > + rz = s->regs.err_reqinfo;
> > + break;
> > +
> > + default:
> > + if (addr >= A_MDCFG0 &&
> > + addr < A_MDCFG0 + 4 * (s->md_num - 1)) {
> > + offset = addr - A_MDCFG0;
> > + idx = offset >> 2;
> > + if (idx == 0 && offset == 0) {
> > + rz = s->regs.mdcfg[idx];
> > + } else {
> > + /* Only MDCFG0 is implemented in rapid-k model */
> > + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad addr %x\n",
> > + __func__, (int)addr);
> > + }
> > + } else if (addr >= A_SRCMD_EN0 &&
> > + addr < A_SRCMD_WH0 + 32 * (s->rrid_num - 1)) {
> > + offset = addr - A_SRCMD_EN0;
> > + idx = offset >> 5;
> > + offset &= 0x1f;
> > +
> > + switch (offset) {
> > + case SRCMD_EN_OFFSET:
> > + rz = s->regs.srcmd_en[idx];
> > + break;
> > + case SRCMD_ENH_OFFSET:
> > + rz = s->regs.srcmd_enh[idx];
> > + break;
> > + default:
> > + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad addr %x\n",
> > + __func__, (int)addr);
> > + break;
> > + }
> > + } else if (addr >= s->entry_offset &&
> > + addr < s->entry_offset + ENTRY_USER_CFG_OFFSET +
> > + 16 * (s->entry_num - 1)) {
> > + offset = addr - s->entry_offset;
> > + idx = offset >> 4;
> > + offset &= 0xf;
> > +
> > + switch (offset) {
> > + case ENTRY_ADDR_OFFSET:
> > + rz = s->regs.entry[idx].addr_reg;
> > + break;
> > + case ENTRY_ADDRH_OFFSET:
> > + rz = s->regs.entry[idx].addrh_reg;
> > + break;
> > + case ENTRY_CFG_OFFSET:
> > + rz = s->regs.entry[idx].cfg_reg;
> > + break;
> > + case ENTRY_USER_CFG_OFFSET:
> > + /* Does not support user customized permission */
> > + rz = 0;
> > + break;
> > + default:
> > + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad addr %x\n",
> > + __func__, (int)addr);
> > + break;
> > + }
> > + } else {
> > + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad addr %x\n",
> > + __func__, (int)addr);
> > + }
> > + break;
> > + }
> > + trace_iopmp_read(addr, rz);
> > + return rz;
> > +}
> > +
> > +static void
> > +iopmp_write(void *opaque, hwaddr addr, uint64_t value, unsigned size)
> > +{
> > + IopmpState *s = IOPMP(opaque);
> > + uint32_t offset, idx;
> > + uint32_t value32 = value;
> > +
> > + trace_iopmp_write(addr, value32);
> > +
> > + switch (addr) {
> > + case A_VERSION: /* RO */
> > + break;
> > + case A_IMP: /* RO */
> > + break;
> > + case A_HWCFG0:
> > + if (FIELD_EX32(value32, HWCFG0, PRIENT_PROG)) {
> > + /* W1C */
> > + s->prient_prog = 0;
> > + }
> > + if (FIELD_EX32(value32, HWCFG0, RRID_TRANSL_PROG)) {
> > + /* W1C */
> > + s->rrid_transl_prog = 0;
> > + }
> > + if (FIELD_EX32(value32, HWCFG0, ENABLE)) {
> > + /* W1S */
> > + s->enable = 1;
> > + iopmp_iommu_notify(s);
> > + }
> > + break;
> > + case A_HWCFG1: /* RO */
> > + break;
> > + case A_HWCFG2:
> > + if (s->prient_prog) {
> > + s->prio_entry = FIELD_EX32(value32, HWCFG2, PRIO_ENTRY);
> > + }
> > + if (s->rrid_transl_en && s->rrid_transl_prog) {
> > + s->rrid_transl = FIELD_EX32(value32, HWCFG2, RRID_TRANSL);
> > + }
> > + break;
> > + case A_ERR_CFG:
> > + if (!FIELD_EX32(s->regs.err_cfg, ERR_CFG, L)) {
> > + s->regs.err_cfg = FIELD_DP32(s->regs.err_cfg, ERR_CFG, L,
> > + FIELD_EX32(value32, ERR_CFG, L));
> > + s->regs.err_cfg = FIELD_DP32(s->regs.err_cfg, ERR_CFG, IE,
> > + FIELD_EX32(value32, ERR_CFG, IE));
> > + s->regs.err_cfg = FIELD_DP32(s->regs.err_cfg, ERR_CFG, IRE,
> > + FIELD_EX32(value32, ERR_CFG, IRE));
> > + s->regs.err_cfg = FIELD_DP32(s->regs.err_cfg, ERR_CFG, RRE,
> > + FIELD_EX32(value32, ERR_CFG, RRE));
> > + s->regs.err_cfg = FIELD_DP32(s->regs.err_cfg, ERR_CFG, IWE,
> > + FIELD_EX32(value32, ERR_CFG, IWE));
> > + s->regs.err_cfg = FIELD_DP32(s->regs.err_cfg, ERR_CFG, RWE,
> > + FIELD_EX32(value32, ERR_CFG, RWE));
> > + }
> > + break;
> > + case A_MDLCK:
> > + if (!FIELD_EX32(s->regs.mdlck, MDLCK, L)) {
> > + s->regs.mdlck = value32;
> > + }
> > + break;
> > + case A_MDLCKH:
> > + if (!FIELD_EX32(s->regs.mdlck, MDLCK, L)) {
> > + s->regs.mdlckh = value32;
> > + }
> > + break;
> > + case A_MDCFGLCK:
> > + if (!FIELD_EX32(s->regs.mdcfglck, MDCFGLCK, L)) {
> > + s->regs.mdcfglck = FIELD_DP32(s->regs.mdcfglck, MDCFGLCK, F,
> > + FIELD_EX32(value32, MDCFGLCK,
> > F));
> > + s->regs.mdcfglck = FIELD_DP32(s->regs.mdcfglck, MDCFGLCK, L,
> > + FIELD_EX32(value32, MDCFGLCK,
> > L));
> > + }
> > + break;
> > + case A_ENTRYLCK:
> > + if (!(FIELD_EX32(s->regs.entrylck, ENTRYLCK, L))) {
> > + s->regs.entrylck = FIELD_DP32(s->regs.entrylck, ENTRYLCK, F,
> > + FIELD_EX32(value32, ENTRYLCK,
> > F));
> > + s->regs.entrylck = FIELD_DP32(s->regs.entrylck, ENTRYLCK, L,
> > + FIELD_EX32(value32, ENTRYLCK,
> > L));
> > + }
> > + case A_ERR_REQADDR: /* RO */
> > + break;
> > + case A_ERR_REQADDRH: /* RO */
> > + break;
> > + case A_ERR_REQID: /* RO */
> > + break;
> > + case A_ERR_REQINFO:
> > + if (FIELD_EX32(value32, ERR_REQINFO, V)) {
> > + s->regs.err_reqinfo = FIELD_DP32(s->regs.err_reqinfo,
> > + ERR_REQINFO, V, 0);
> > + qemu_set_irq(s->irq, 0);
> > + }
> > + break;
> > +
> > + default:
> > + if (addr >= A_MDCFG0 &&
> > + addr < A_MDCFG0 + 4 * (s->md_num - 1)) {
> > + offset = addr - A_MDCFG0;
> > + idx = offset >> 2;
> > + /* RO in rapid-k model */
> > + if (idx > 0) {
> > + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad addr %x\n",
> > + __func__, (int)addr);
> > + }
> > + } else if (addr >= A_SRCMD_EN0 &&
> > + addr < A_SRCMD_WH0 + 32 * (s->rrid_num - 1)) {
> > + offset = addr - A_SRCMD_EN0;
> > + idx = offset >> 5;
> > + offset &= 0x1f;
> > +
> > + if (offset % 4) {
> > + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad addr %x\n",
> > + __func__, (int)addr);
> > + } else if (FIELD_EX32(s->regs.srcmd_en[idx], SRCMD_EN0, L)
> > + == 0) {
> > + switch (offset) {
> > + case SRCMD_EN_OFFSET:
> > + s->regs.srcmd_en[idx] =
> > + FIELD_DP32(s->regs.srcmd_en[idx], SRCMD_EN0, L,
> > + FIELD_EX32(value32, SRCMD_EN0, L));
> > +
> > + /* MD field is protected by mdlck */
> > + value32 = (value32 & ~s->regs.mdlck) |
> > + (s->regs.srcmd_en[idx] & s->regs.mdlck);
> > + s->regs.srcmd_en[idx] =
> > + FIELD_DP32(s->regs.srcmd_en[idx], SRCMD_EN0, MD,
> > + FIELD_EX32(value32, SRCMD_EN0, MD));
> > + break;
> > + case SRCMD_ENH_OFFSET:
> > + value32 = (value32 & ~s->regs.mdlckh) |
> > + (s->regs.srcmd_enh[idx] & s->regs.mdlckh);
> > + s->regs.srcmd_enh[idx] =
> > + FIELD_DP32(s->regs.srcmd_enh[idx], SRCMD_ENH0, MDH,
> > + value32);
> > + break;
> > + default:
> > + break;
> > + }
> > + }
> > + } else if (addr >= s->entry_offset &&
> > + addr < s->entry_offset + ENTRY_USER_CFG_OFFSET
> > + + 16 * (s->entry_num - 1)) {
> > + offset = addr - s->entry_offset;
> > + idx = offset >> 4;
> > + offset &= 0xf;
> > +
> > + /* index < ENTRYLCK_F is protected */
> > + if (idx >= FIELD_EX32(s->regs.entrylck, ENTRYLCK, F)) {
> > + switch (offset) {
> > + case ENTRY_ADDR_OFFSET:
> > + s->regs.entry[idx].addr_reg = value32;
> > + break;
> > + case ENTRY_ADDRH_OFFSET:
> > + s->regs.entry[idx].addrh_reg = value32;
> > + break;
> > + case ENTRY_CFG_OFFSET:
> > + s->regs.entry[idx].cfg_reg = value32;
> > + break;
> > + case ENTRY_USER_CFG_OFFSET:
> > + /* Does not support user customized permission */
> > + break;
> > + default:
> > + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad addr %x\n",
> > + __func__, (int)addr);
> > + break;
> > + }
> > + iopmp_update_rule(s, idx);
> > + if (idx + 1 < s->entry_num &&
> > + FIELD_EX32(s->regs.entry[idx + 1].cfg_reg, ENTRY_CFG,
> > A) ==
> > + IOPMP_AMATCH_TOR) {
> > + iopmp_update_rule(s, idx + 1);
> > + }
> > + }
> > + } else {
> > + qemu_log_mask(LOG_GUEST_ERROR, "%s: Bad addr %x\n", __func__,
> > + (int)addr);
> > + }
> > + }
> > +}
> > +
> > +/* Match entry in memory domain */
> > +static int match_entry_md(IopmpState *s, int md_idx, hwaddr s_addr,
> > + hwaddr e_addr, int *entry_idx)
> > +{
> > + int entry_idx_s, entry_idx_e;
> > + int result = ENTRY_NO_HIT;
> > + int i = 0;
> > + entry_idx_s = md_idx * s->regs.mdcfg[0];
> > + entry_idx_e = (md_idx + 1) * s->regs.mdcfg[0];
> > +
> > + if (entry_idx_s >= s->entry_num) {
> > + return result;
> > + }
> > + if (entry_idx_e > s->entry_num) {
> > + entry_idx_e = s->entry_num;
> > + }
> > + i = entry_idx_s;
> > + for (i = entry_idx_s; i < entry_idx_e; i++) {
> > + if (FIELD_EX32(s->regs.entry[i].cfg_reg, ENTRY_CFG, A) ==
> > + IOPMP_AMATCH_OFF) {
> > + continue;
> > + }
> > + if (s_addr >= s->entry_addr[i].sa && s_addr <=
> > s->entry_addr[i].ea) {
> > + /* Check end address */
> > + if (e_addr >= s->entry_addr[i].sa &&
> > + e_addr <= s->entry_addr[i].ea) {
> > + *entry_idx = i;
> > + return ENTRY_HIT;
> > + } else if (i >= s->prio_entry) {
> > + /* Continue for non-prio_entry */
> > + continue;
> > + } else {
> > + *entry_idx = i;
> > + return ENTRY_PAR_HIT;
> > + }
> > + } else if (e_addr >= s->entry_addr[i].sa &&
> > + e_addr <= s->entry_addr[i].ea) {
> > + /* Only end address matches the entry */
> > + if (i >= s->prio_entry) {
> > + continue;
> > + } else {
> > + *entry_idx = i;
> > + return ENTRY_PAR_HIT;
> > + }
> > + } else if (s_addr < s->entry_addr[i].sa &&
> > + e_addr > s->entry_addr[i].ea) {
> > + if (i >= s->prio_entry) {
> > + continue;
> > + } else {
> > + *entry_idx = i;
> > + return ENTRY_PAR_HIT;
> > + }
> > + }
> > + }
> > + return result;
> > +}
> > +
> > +static int match_entry(IopmpState *s, int rrid, hwaddr s_addr, hwaddr
> > e_addr,
> > + int *match_md_idx, int *match_entry_idx)
> > +{
> > + int cur_result = ENTRY_NO_HIT;
> > + int result = ENTRY_NO_HIT;
> > + /* Remove lock bit */
> > + uint64_t srcmd_en = ((uint64_t)s->regs.srcmd_en[rrid] |
> > + ((uint64_t)s->regs.srcmd_enh[rrid] << 32)) >> 1;
> > +
> > + for (int md_idx = 0; md_idx < s->md_num; md_idx++) {
> > + if (srcmd_en & (1ULL << md_idx)) {
> > + cur_result = match_entry_md(s, md_idx, s_addr, e_addr,
> > + match_entry_idx);
> > + if (cur_result == ENTRY_HIT || cur_result == ENTRY_PAR_HIT) {
> > + *match_md_idx = md_idx;
> > + return cur_result;
> > + }
> > + }
> > + }
> > + return result;
> > +}
> > +
> > +static void iopmp_error_reaction(IopmpState *s, uint32_t id, hwaddr start,
> > + hwaddr end, uint32_t info)
> > +{
> > + if (!FIELD_EX32(s->regs.err_reqinfo, ERR_REQINFO, V)) {
> > + s->regs.err_reqinfo = info;
> > + s->regs.err_reqinfo = FIELD_DP32(s->regs.err_reqinfo, ERR_REQINFO,
> > V,
> > + 1);
> > + s->regs.err_reqid = id;
> > + /* addr[LEN+2:2] */
> > + s->regs.err_reqaddr = start >> 2;
> > +
> > + if (FIELD_EX32(info, ERR_REQINFO, TTYPE) == ERR_REQINFO_TTYPE_READ
> > &&
> > + FIELD_EX32(s->regs.err_cfg, ERR_CFG, IE) &&
> > + FIELD_EX32(s->regs.err_cfg, ERR_CFG, IRE)) {
> > + qemu_set_irq(s->irq, 1);
> > + }
> > + if (FIELD_EX32(info, ERR_REQINFO, TTYPE) ==
> > ERR_REQINFO_TTYPE_WRITE &&
> > + FIELD_EX32(s->regs.err_cfg, ERR_CFG, IE) &&
> > + FIELD_EX32(s->regs.err_cfg, ERR_CFG, IWE)) {
> > + qemu_set_irq(s->irq, 1);
> > + }
> > + }
> > +}
> > +
> > +static IOMMUTLBEntry iopmp_translate(IOMMUMemoryRegion *iommu, hwaddr addr,
> > + IOMMUAccessFlags flags, int iommu_idx)
> > +{
> > + int pci_id = 0;
> > + int rrid = iommu_idx;
> > + IopmpState *s;
> > + MemoryRegion *mr = MEMORY_REGION(iommu);
> > + hwaddr start_addr, end_addr;
> > + int entry_idx = -1;
> > + int md_idx = -1;
> > + int result;
> > + uint32_t error_info = 0;
> > + uint32_t error_id = 0;
> > + IOMMUTLBEntry entry = {
> > + .target_as = NULL,
> > + .iova = addr,
> > + .translated_addr = addr,
> > + .addr_mask = 0,
> > + .perm = IOMMU_NONE,
> > + };
> > +
> > + /* Find IOPMP of iommu */
> > + if (strncmp(mr->name, "riscv-iopmp-sysbus-iommu", 24) != 0) {
> Should we report an error here? IMHO, we can assert it.
It just check the device is from system bus or pci bus.
There should not be any errors here.
> > + sscanf(mr->name, "riscv-iopmp-pci-iommu%d", &pci_id);
> > + iopmp_pci_addressspcace *pci_s = container_of(iommu,
> > +
> > iopmp_pci_addressspcace,
> > + iommu);
> > + s = IOPMP(pci_s->iopmp);
> > + /* If device does not specify rrid, use id from pci */
> > + if (rrid == 0) {
> > + rrid = pci_id;
> > + }
> > + } else {
> > + s = IOPMP(container_of(iommu, IopmpState, iommu));
> > + }
> > + entry.target_as = &s->downstream_as;
> > +
> > + /* Because IOMMU doesn't have the tansaction legth, use the same
> > address */
> > + start_addr = addr;
> > + end_addr = addr;
>
> If that's true, can we exactly get the ENTRY_HIT or ENTRY_PAR_HIT?
>
> I think it is necessary to pass the transaction length to translate
> function.
Without transaction length, ENTRY_PAR_HIT will not occur.
We only get ENTRY_HIT or ENTRY_NO_HIT by matching the start address of
the transaction.
>
> > +
> > + if (!s->enable) {
> > + /* Bypass IOPMP */
> > + entry.perm = IOMMU_RW;
> > + return entry;
> > + }
> > +
> > + /* unknown RRID */
> > + if (rrid >= s->rrid_num) {
> > + error_id = FIELD_DP32(error_id, ERR_REQID, RRID, rrid);
> > + error_info = FIELD_DP32(error_info, ERR_REQINFO, ETYPE,
> > + ERR_REQINFO_ETYPE_RRID);
> > + error_info = FIELD_DP32(error_info, ERR_REQINFO, TTYPE, flags);
> > + iopmp_error_reaction(s, error_id, start_addr, end_addr,
> > error_info);
> > + entry.target_as = &s->blocked_io_as;
> > + entry.perm = IOMMU_RW;
> > + return entry;
> > + }
> > +
> > + result = match_entry(s, rrid, start_addr, end_addr, &md_idx,
> > &entry_idx);
> > + if (result == ENTRY_HIT) {
> > + entry.perm = s->regs.entry[entry_idx].cfg_reg & 0x7;
> > + if ((entry.perm & flags) == 0) {
> > + /* permission denied */
> > + error_id = FIELD_DP32(error_id, ERR_REQID, EID, entry_idx);
> > + error_id = FIELD_DP32(error_id, ERR_REQID, RRID, rrid);
> > + error_info = FIELD_DP32(error_info, ERR_REQINFO, ETYPE,
> > + ERR_REQINFO_ETYPE_READ + flags - 1);
> > + error_info = FIELD_DP32(error_info, ERR_REQINFO, TTYPE, flags);
> > + iopmp_error_reaction(s, error_id, start_addr, end_addr,
> > error_info);
> > + entry.target_as = &s->blocked_io_as;
> > + entry.perm = IOMMU_RW;
> > + } else {
> > + entry.addr_mask = s->entry_addr[entry_idx].ea -
> > + s->entry_addr[entry_idx].sa;
> > + if (s->rrid_transl_en) {
> > + /* pass to next iopmp */
> > + if (s->next_iommu) {
> > + /* Get result from next IOPMP */
> > + entry = iopmp_translate(s->next_iommu, addr, flags,
> > + s->rrid_transl);
> > + return entry;
> > + } else {
> > + qemu_log_mask(LOG_GUEST_ERROR, "Next iopmp is not
> > found.");
> > + }
> > + }
> > + }
> > + } else {
> > + if (result == ENTRY_PAR_HIT) {
> > + error_id = FIELD_DP32(error_id, ERR_REQID, EID, entry_idx);
> > + error_id = FIELD_DP32(error_id, ERR_REQID, RRID, rrid);
> > + error_info = FIELD_DP32(error_info, ERR_REQINFO, ETYPE,
> > + ERR_REQINFO_ETYPE_PARHIT);
> > + error_info = FIELD_DP32(error_info, ERR_REQINFO, TTYPE, flags);
> > + iopmp_error_reaction(s, error_id, start_addr, end_addr,
> > error_info);
> > + } else {
> > + error_id = FIELD_DP32(error_id, ERR_REQID, RRID, rrid);
> > + error_info = FIELD_DP32(error_info, ERR_REQINFO, ETYPE,
> > + ERR_REQINFO_ETYPE_NOHIT);
> > + error_info = FIELD_DP32(error_info, ERR_REQINFO, TTYPE, flags);
> > + iopmp_error_reaction(s, error_id, start_addr, end_addr,
> > error_info);
> > + }
> > + entry.target_as = &s->blocked_io_as;
> > + entry.perm = IOMMU_RW;
> > + }
> > + return entry;
> > +}
> > +
> > +static const MemoryRegionOps iopmp_ops = {
> > + .read = iopmp_read,
> > + .write = iopmp_write,
> > + .endianness = DEVICE_NATIVE_ENDIAN,
> > + .valid = {.min_access_size = 4, .max_access_size = 4}
> > +};
> > +
> > +static MemTxResult iopmp_block_write(void *opaque, hwaddr addr, uint64_t
> > value,
> > + unsigned size, MemTxAttrs attrs)
> > +{
> > + IopmpState *s = IOPMP(opaque);
> > +
> > + switch (FIELD_EX32(s->regs.err_cfg, ERR_CFG, RWE)) {
> > + case RWE_ERROR:
> > + return MEMTX_ERROR;
> > + break;
> > + case RWE_SUCCESS:
> > + return MEMTX_OK;
> > + break;
> > + default:
> > + break;
> > + }
> > + return MEMTX_OK;
> > +}
> > +
> > +static MemTxResult iopmp_block_read(void *opaque, hwaddr addr, uint64_t
> > *pdata,
> > + unsigned size, MemTxAttrs attrs)
> > +{
> > + IopmpState *s = IOPMP(opaque);
> > +
> > + switch (FIELD_EX32(s->regs.err_cfg, ERR_CFG, RRE)) {
> > + case RRE_ERROR:
> > + return MEMTX_ERROR;
> > + break;
> > + case RRE_SUCCESS_VALUE:
> > + *pdata = s->fabricated_v;
> > + return MEMTX_OK;
> > + break;
> > + default:
> > + break;
> > + }
> > + return MEMTX_OK;
> > +}
> > +
> > +static const MemoryRegionOps iopmp_block_io_ops = {
> > + .read_with_attrs = iopmp_block_read,
> > + .write_with_attrs = iopmp_block_write,
> > + .endianness = DEVICE_NATIVE_ENDIAN,
> > + .valid = {.min_access_size = 1, .max_access_size = 8},
> > +};
> > +
> > +static void iopmp_realize(DeviceState *dev, Error **errp)
> > +{
> > + Object *obj = OBJECT(dev);
> > + SysBusDevice *sbd = SYS_BUS_DEVICE(dev);
> > + IopmpState *s = IOPMP(dev);
> > + uint64_t size;
> > +
> > + if (!s->downstream) {
> > + s->downstream = get_system_memory();
> > + }
> > + size = memory_region_size(s->downstream);
> > + s->model = IOPMP_MODEL_RAPIDK;
> > + s->regs.mdcfglck = FIELD_DP32(s->regs.mdcfglck, MDCFGLCK, F,
> > s->md_num);
> > + s->regs.mdcfglck = FIELD_DP32(s->regs.mdcfglck, MDCFGLCK, L, 1);
> > +
> > + s->prient_prog = s->default_prient_prog;
> > + s->rrid_num = MIN(s->rrid_num, IOPMP_MAX_RRID_NUM);
> > + s->md_num = MIN(s->md_num, IOPMP_MAX_MD_NUM);
> > + s->entry_num = s->md_num * s->k;
> > + s->prio_entry = MIN(s->prio_entry, s->entry_num);
> > +
> > + s->regs.mdcfg = g_malloc0(s->md_num * sizeof(uint32_t));
> > + s->regs.mdcfg[0] = s->k;
> > +
> > + s->regs.srcmd_en = g_malloc0(s->rrid_num * sizeof(uint32_t));
> > + s->regs.srcmd_enh = g_malloc0(s->rrid_num * sizeof(uint32_t));
> > + s->regs.entry = g_malloc0(s->entry_num * sizeof(iopmp_entry_t));
> > + s->entry_addr = g_malloc0(s->entry_num * sizeof(iopmp_addr_t));
> > + s->iopmp_pci = g_malloc0(s->rrid_num * sizeof(iopmp_pci_addressspcace
> > *));
> > +
> > + s->rrid_transl_prog = s->default_rrid_transl_prog;
> > +
> > + memory_region_init_iommu(&s->iommu, sizeof(s->iommu),
> > + TYPE_IOPMP_IOMMU_MEMORY_REGION,
> > + obj, "riscv-iopmp-sysbus-iommu", UINT64_MAX);
> > + address_space_init(&s->iopmp_sysbus_as, MEMORY_REGION(&s->iommu),
> > "iommu");
> > + memory_region_init_io(&s->mmio, obj, &iopmp_ops,
> > + s, "iopmp-regs", 0x100000);
> > + sysbus_init_mmio(sbd, &s->mmio);
> > + memory_region_init_io(&s->blocked_io, obj, &iopmp_block_io_ops,
> > + s, "iopmp-blocked-io", size);
> > + address_space_init(&s->downstream_as, s->downstream,
> > + "iopmp-downstream-as");
> > + address_space_init(&s->blocked_io_as, &s->blocked_io,
> > + "iopmp-blocked-io-as");
> > +}
> > +
> > +static void iopmp_reset(DeviceState *dev)
> > +{
> > + IopmpState *s = IOPMP(dev);
> > +
> > + qemu_set_irq(s->irq, 0);
> > + memset(s->regs.srcmd_en, 0, s->rrid_num * sizeof(uint32_t));
> > + memset(s->regs.srcmd_enh, 0, s->rrid_num * sizeof(uint32_t));
> > + memset(s->entry_addr, 0, s->entry_num * sizeof(iopmp_addr_t));
> > +
> > + s->regs.mdlck = 0;
> > + s->regs.mdlckh = 0;
> > + s->regs.entrylck = 0;
> > + s->regs.mdstall = 0;
> > + s->regs.mdstallh = 0;
> > + s->regs.rridscp = 0;
> > + s->regs.err_cfg = 0;
> > + s->regs.err_reqaddr = 0;
> > + s->regs.err_reqid = 0;
> > + s->regs.err_reqinfo = 0;
> > +
> > + s->prient_prog = s->default_prient_prog;
> > + s->rrid_transl_prog = s->default_rrid_transl_prog;
> > + s->enable = 0;
> > +
> > + s->regs.mdcfglck = FIELD_DP32(s->regs.mdcfglck, MDCFGLCK, F,
> > s->md_num);
> > + s->regs.mdcfglck = FIELD_DP32(s->regs.mdcfglck, MDCFGLCK, L, 1);
> > + s->regs.mdcfg[0] = s->k;
> > +}
> > +
> > +static int iopmp_attrs_to_index(IOMMUMemoryRegion *iommu, MemTxAttrs attrs)
> > +{
> > + return attrs.requester_id;
> > +}
> > +
> > +static void iopmp_iommu_memory_region_class_init(ObjectClass *klass, void
> > *data)
> > +{
> > + IOMMUMemoryRegionClass *imrc = IOMMU_MEMORY_REGION_CLASS(klass);
> > +
> > + imrc->translate = iopmp_translate;
> > + imrc->attrs_to_index = iopmp_attrs_to_index;
> > +}
> > +
> > +static Property iopmp_property[] = {
> > + DEFINE_PROP_BOOL("rrid_transl_en", IopmpState, rrid_transl_en, false),
> > + DEFINE_PROP_BOOL("rrid_transl_prog", IopmpState,
> > default_rrid_transl_prog,
> > + true),
> > + DEFINE_PROP_BOOL("prient_prog", IopmpState, default_prient_prog, true),
> > + DEFINE_PROP_UINT32("k", IopmpState, k, 6),
> > + DEFINE_PROP_UINT32("prio_entry", IopmpState, prio_entry, 48),
> > + DEFINE_PROP_UINT32("rrid_num", IopmpState, rrid_num, 16),
> > + DEFINE_PROP_UINT32("md_num", IopmpState, md_num, 8),
> > + DEFINE_PROP_UINT32("entry_offset", IopmpState, entry_offset, 0x4000),
> > + DEFINE_PROP_UINT32("fabricated_v", IopmpState, fabricated_v, 0x0),
> > + DEFINE_PROP_LINK("downstream", IopmpState, downstream,
> > TYPE_MEMORY_REGION,
> > + MemoryRegion *),
> > + DEFINE_PROP_END_OF_LIST(),
> > +};
> > +
> > +static void iopmp_class_init(ObjectClass *klass, void *data)
> > +{
> > + DeviceClass *dc = DEVICE_CLASS(klass);
> > + device_class_set_props(dc, iopmp_property);
> > + dc->realize = iopmp_realize;
> > + dc->reset = iopmp_reset;
> > +}
> > +
> > +static void iopmp_init(Object *obj)
> > +{
> > + IopmpState *s = IOPMP(obj);
> > + SysBusDevice *sbd = SYS_BUS_DEVICE(obj);
> > +
> > + sysbus_init_irq(sbd, &s->irq);
> > +}
> > +
> > +static const TypeInfo iopmp_info = {
> > + .name = TYPE_IOPMP,
> > + .parent = TYPE_SYS_BUS_DEVICE,
> > + .instance_size = sizeof(IopmpState),
> > + .instance_init = iopmp_init,
> > + .class_init = iopmp_class_init,
> > +};
> > +
> > +static const TypeInfo
> > +iopmp_iommu_memory_region_info = {
> > + .name = TYPE_IOPMP_IOMMU_MEMORY_REGION,
> > + .parent = TYPE_IOMMU_MEMORY_REGION,
> > + .class_init = iopmp_iommu_memory_region_class_init,
> > +};
> > +
> > +void
> > +cascade_iopmp(DeviceState *cur_dev, DeviceState *next_dev)
> > +{
> > + IopmpState *s = IOPMP(cur_dev);
> > + IopmpState *next_s = IOPMP(next_dev);
> > +
> > + s->rrid_transl_en = true;
> > + s->next_iommu = &next_s->iommu;
> > +}
> > +
> > +static AddressSpace *iopmp_find_add_as(PCIBus *bus, void *opaque, int
> > devfn)
> > +{
> > + IopmpState *s = opaque;
> > + uint32_t id = (PCI_BUILD_BDF(pci_bus_num(bus), devfn) >> 3) %
> > s->rrid_num;
> > + iopmp_pci_addressspcace *iopmp_pci = s->iopmp_pci[id];
> > +
> > + if (iopmp_pci == NULL) {
> > + g_autofree char *name = NULL;
> > + name = g_strdup_printf("riscv-iopmp-pci-iommu%d", id);
> > + iopmp_pci = g_new0(iopmp_pci_addressspcace, 1);
> > + iopmp_pci->iopmp = opaque;
> > + memory_region_init_iommu(&iopmp_pci->iommu,
> > + sizeof(iopmp_pci->iommu),
> > + TYPE_IOPMP_IOMMU_MEMORY_REGION,
> > + OBJECT(s), name, UINT64_MAX);
> > + address_space_init(&iopmp_pci->as,
> > + MEMORY_REGION(&iopmp_pci->iommu), "iommu");
> > + }
>
> I think we are only use IOMMUMemoryRegion for remapping. Is there any
> reason to make them different?
>
The only different thing is the pci_id. We can get the id by
IOMMUMemoryRegion name.
Thanks,
Ethan
>
> > + return &iopmp_pci->as;
> > +}
> > +
> > +static const PCIIOMMUOps iopmp_iommu_ops = {
> > + .get_address_space = iopmp_find_add_as,
> > +};
> > +
> > +void iopmp_setup_pci(DeviceState *iopmp_dev, PCIBus *bus)
> > +{
> > + IopmpState *s = IOPMP(iopmp_dev);
> > + pci_setup_iommu(bus, &iopmp_iommu_ops, s);
> > +}
> > +
> > +static void
> > +iopmp_register_types(void)
> > +{
> > + type_register_static(&iopmp_info);
> > + type_register_static(&iopmp_iommu_memory_region_info);
> > +}
> > +
> > +type_init(iopmp_register_types);
> > diff --git a/hw/misc/trace-events b/hw/misc/trace-events
> > index 5d241cb40a..5d0d8e8093 100644
> > --- a/hw/misc/trace-events
> > +++ b/hw/misc/trace-events
> > @@ -351,3 +351,7 @@ djmemc_write(int reg, uint64_t value, unsigned int
> > size) "reg=0x%x value=0x%"PRI
> > # iosb.c
> > iosb_read(int reg, uint64_t value, unsigned int size) "reg=0x%x
> > value=0x%"PRIx64" size=%u"
> > iosb_write(int reg, uint64_t value, unsigned int size) "reg=0x%x
> > value=0x%"PRIx64" size=%u"
> > +
> > +# riscv_iopmp.c
> > +iopmp_read(uint64_t addr, uint32_t val) "addr 0x%"PRIx64" val 0x%x"
> > +iopmp_write(uint64_t addr, uint32_t val) "addr 0x%"PRIx64" val 0x%x"
> > diff --git a/include/hw/misc/riscv_iopmp.h b/include/hw/misc/riscv_iopmp.h
> > new file mode 100644
> > index 0000000000..88b14a9e1d
> > --- /dev/null
> > +++ b/include/hw/misc/riscv_iopmp.h
> > @@ -0,0 +1,152 @@
> > +/*
> > + * QEMU RISC-V IOPMP (Input Output Physical Memory Protection)
> > + *
> > + * Copyright (c) 2023 Andes Tech. Corp.
> > + *
> > + * This program is free software; you can redistribute it and/or modify it
> > + * under the terms and conditions of the GNU General Public License,
> > + * version 2 or later, as published by the Free Software Foundation.
> > + *
> > + * This program is distributed in the hope it will be useful, but WITHOUT
> > + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
> > + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
> > for
> > + * more details.
> > + *
> > + * You should have received a copy of the GNU General Public License along
> > with
> > + * this program. If not, see <http://www.gnu.org/licenses/>.
> > + */
> > +
> > +#ifndef RISCV_IOPMP_H
> > +#define RISCV_IOPMP_H
> > +
> > +#include "hw/sysbus.h"
> > +#include "qemu/typedefs.h"
> > +#include "memory.h"
> > +#include "hw/pci/pci_bus.h"
> > +
> > +#define TYPE_IOPMP "iopmp"
> > +#define IOPMP(obj) OBJECT_CHECK(IopmpState, (obj), TYPE_IOPMP)
> > +
> > +#define IOPMP_MAX_MD_NUM 63
> > +#define IOPMP_MAX_RRID_NUM 65535
> > +#define IOPMP_MAX_ENTRY_NUM 65535
> > +
> > +#define VENDER_VIRT 0
> > +#define SPECVER_0_9_1 91
> > +#define IMPID_0_9_1 91
> > +
> > +#define RRE_ERROR 0
> > +#define RRE_SUCCESS_VALUE 1
> > +
> > +#define RWE_ERROR 0
> > +#define RWE_SUCCESS 1
> > +
> > +#define ERR_REQINFO_TTYPE_READ 1
> > +#define ERR_REQINFO_TTYPE_WRITE 2
> > +#define ERR_REQINFO_TTYPE_FETCH 3
> > +#define ERR_REQINFO_ETYPE_NOERROR 0
> > +#define ERR_REQINFO_ETYPE_READ 1
> > +#define ERR_REQINFO_ETYPE_WRITE 2
> > +#define ERR_REQINFO_ETYPE_FETCH 3
> > +#define ERR_REQINFO_ETYPE_PARHIT 4
> > +#define ERR_REQINFO_ETYPE_NOHIT 5
> > +#define ERR_REQINFO_ETYPE_RRID 6
> > +#define ERR_REQINFO_ETYPE_USER 7
> > +
> > +#define IOPMP_MODEL_FULL 0
> > +#define IOPMP_MODEL_RAPIDK 0x1
> > +#define IOPMP_MODEL_DYNAMICK 0x2
> > +#define IOPMP_MODEL_ISOLATION 0x3
> > +#define IOPMP_MODEL_COMPACTK 0x4
> > +
> > +#define ENTRY_NO_HIT 0
> > +#define ENTRY_PAR_HIT 1
> > +#define ENTRY_HIT 2
> > +
> > +typedef enum {
> > + IOPMP_AMATCH_OFF, /* Null (off) */
> > + IOPMP_AMATCH_TOR, /* Top of Range */
> > + IOPMP_AMATCH_NA4, /* Naturally aligned four-byte region */
> > + IOPMP_AMATCH_NAPOT /* Naturally aligned power-of-two region */
> > +} iopmp_am_t;
> > +
> > +typedef struct {
> > + uint32_t addr_reg;
> > + uint32_t addrh_reg;
> > + uint32_t cfg_reg;
> > +} iopmp_entry_t;
> > +
> > +typedef struct {
> > + uint64_t sa;
> > + uint64_t ea;
> > +} iopmp_addr_t;
> > +
> > +typedef struct {
> > + uint32_t *srcmd_en;
> > + uint32_t *srcmd_enh;
> > + uint32_t *mdcfg;
> > + iopmp_entry_t *entry;
> > + uint32_t mdlck;
> > + uint32_t mdlckh;
> > + uint32_t entrylck;
> > + uint32_t mdcfglck;
> > + uint32_t mdstall;
> > + uint32_t mdstallh;
> > + uint32_t rridscp;
> > + uint32_t err_cfg;
> > + uint64_t err_reqaddr;
> > + uint32_t err_reqid;
> > + uint32_t err_reqinfo;
> > +} iopmp_regs;
> > +
> > +
> > +typedef struct iopmp_error_info {
> > + uint32_t reqinfo;
> > + hwaddr start_addr;
> > + hwaddr end_addr;
> > +} iopmp_error_info;
> > +
> > +typedef struct iopmp_pci_as {
> > + void *iopmp;
> > + IOMMUMemoryRegion iommu;
> > + AddressSpace as;
> > +} iopmp_pci_addressspcace;
> > +
> > +typedef struct IopmpState {
> > + SysBusDevice parent_obj;
> > + iopmp_addr_t *entry_addr;
> > + MemoryRegion mmio;
> > + IOMMUMemoryRegion iommu;
> > + IOMMUMemoryRegion *next_iommu;
> > + iopmp_regs regs;
> > + MemoryRegion *downstream;
> > + MemoryRegion blocked_io;
> > + MemoryRegion stall_io;
> > + uint32_t model;
> > + uint32_t k;
> > + bool rrid_transl_prog;
> > + bool prient_prog;
> > + bool default_rrid_transl_prog;
> > + bool default_prient_prog;
> > + bool rrid_transl_en;
> > + uint32_t rrid_transl;
> > +
> > + AddressSpace iopmp_sysbus_as;
> > + iopmp_pci_addressspcace **iopmp_pci;
> > + AddressSpace downstream_as;
> > + AddressSpace blocked_io_as;
> > + qemu_irq irq;
> > + bool enable;
> > + uint32_t prio_entry;
> > +
> > + uint32_t rrid_num;
> > + uint32_t md_num;
> > + uint32_t entry_num;
> > + uint32_t entry_offset;
> > + uint32_t fabricated_v;
> > +} IopmpState;
> > +
> > +void cascade_iopmp(DeviceState *cur_dev, DeviceState *next_dev);
> > +void iopmp_setup_pci(DeviceState *iopmp_dev, PCIBus *bus);
> > +
> > +#endif