On Fri, Aug 14, 2026 at 10:25 AM Subrahmanya Lingappa <[email protected]> wrote: > > RPMI (RISC-V Platform Management Interface) is the RISC-V non-ISA > platform management specification. It defines a shared-memory transport, > message protocol, and service groups for platform management. > > Add the QEMU transport backend and Base service plumbing for virt using > librpmi. > > This implementation targets the RISC-V Platform Management Interface > (RPMI) Specification v1.0 Ratified: > > https://github.com/riscv-non-isa/riscv-rpmi/releases/download/v1.0/riscv-rpmi.pdf > > The librpmi backend is maintained at: > > https://github.com/riscv-software-src/librpmi > > Signed-off-by: Subrahmanya Lingappa <[email protected]> > --- > MAINTAINERS | 2 + > hw/misc/Kconfig | 4 + > hw/misc/meson.build | 3 + > hw/misc/riscv_rpmi.c | 477 ++++++++++++++++++++++++++++++++++ > hw/misc/riscv_rpmi_internal.h | 24 ++ > include/hw/misc/riscv_rpmi.h | 90 +++++++ > 6 files changed, 600 insertions(+) > create mode 100644 hw/misc/riscv_rpmi.c > create mode 100644 hw/misc/riscv_rpmi_internal.h > create mode 100644 include/hw/misc/riscv_rpmi.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index 93df53d87f..8e91a31757 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -359,6 +359,8 @@ F: target/riscv/ > F: hw/char/riscv_htif.c > F: hw/riscv/ > F: hw/intc/riscv* > +F: hw/misc/riscv_rpmi* > +F: include/hw/misc/riscv_rpmi.h > F: include/hw/char/riscv_htif.h > F: include/hw/riscv/ > F: common-user/host/riscv* > diff --git a/hw/misc/Kconfig b/hw/misc/Kconfig > index 1543ee6653..998944c342 100644 > --- a/hw/misc/Kconfig > +++ b/hw/misc/Kconfig > @@ -258,3 +258,7 @@ config XLNX_ZYNQ_DDRC > bool > > source macio/Kconfig > + > +config RISCV_RPMI > + bool > + depends on LIBRPMI > diff --git a/hw/misc/meson.build b/hw/misc/meson.build > index 23265f6035..e7c2ebe28f 100644 > --- a/hw/misc/meson.build > +++ b/hw/misc/meson.build > @@ -168,3 +168,6 @@ system_ss.add(when: 'CONFIG_SBSA_REF', if_true: > files('sbsa_ec.c')) > > # HPPA devices > system_ss.add(when: 'CONFIG_LASI', if_true: files('lasi.c')) > NIT: A blank line here would be better.
> +system_ss.add(when: 'CONFIG_RISCV_RPMI', if_true: [files( > + 'riscv_rpmi.c', > +), librpmi]) > diff --git a/hw/misc/riscv_rpmi.c b/hw/misc/riscv_rpmi.c > new file mode 100644 > index 0000000000..54a790fc7c > --- /dev/null > +++ b/hw/misc/riscv_rpmi.c > @@ -0,0 +1,477 @@ > +/* > + * SPDX-License-Identifier: GPL-2.0-or-later > + * > + * RISC-V RPMI transport device. > + * > + * Copyright (c) 2026 Qualcomm Technologies, Inc. > + * Author: > + * Subrahmanya Lingappa <[email protected]> > + */ > + > +#include "qemu/osdep.h" > +#include "qapi/error.h" > +#include "qemu/log.h" > +#include "qemu/module.h" > +#include "exec/cpu-common.h" > +#include "hw/core/qdev-properties.h" > +#include "hw/misc/riscv_rpmi.h" > +#include "hw/misc/riscv_rpmi_internal.h" > +#include "migration/vmstate.h" > +#include "system/address-spaces.h" > +#include "system/runstate.h" > +#include "librpmi.h" > +#include "librpmi_env.h" > + > +void *rpmi_env_zalloc(rpmi_size_t size) > +{ > + return g_malloc0(size); > +} > + > +void rpmi_env_free(void *ptr) > +{ > + g_free(ptr); > +} > + > +void rpmi_env_writel(rpmi_uint64_t addr, rpmi_uint32_t val) > +{ > + cpu_physical_memory_write(addr, &val, sizeof(val)); > +} > These cpu_physical_memory_*() interfaces are renamed, right? Thanks, Sunil
