Adding will and Julien. Thanks. On Fri, Feb 3, 2023 at 12:30 PM Rajnesh Kanwal <rkanwal@xxxxxxxxxxxx> wrote: > > The default serial and rtc IO region overlaps with PCI IO bar > region leading bar 0 activation to fail. Moving these devices > to MMIO region similar to ARM. > > Given serial has been moved from 0x3f8 to 0x10000000, this > requires us to now pass earlycon=uart8250,mmio,0x10000000 > from cmdline rather than earlycon=uart8250,mmio,0x3f8. > > To avoid the need to change the address every time the tool > is updated, we can also just pass "earlycon" from cmdline > and guest then finds the type and base address by following > the Device Tree's stdout-path property. > > Signed-off-by: Rajnesh Kanwal <rkanwal@xxxxxxxxxxxx> > Tested-by: Atish Patra <atishp@xxxxxxxxxxxx> > Reviewed-by: Atish Patra <atishp@xxxxxxxxxxxx> > --- > v4: Incorporated feedback from Alexandru Elisei. Mainly rebased the > change on main with the IRQ changes which haven't landed yet. Also > a fix in KVM_VIRTIO_MMIO_AREA macro. > > v3: https://lore.kernel.org/all/20230202191301.588804-1-rkanwal@xxxxxxxxxxxx/ > Incorporated feedback from Andre Przywara and Alexandru Elisei. > Mainly updated the commit message to specify that we can simply pass > just "earlycon" from cmdline and avoid the need to specify uart address. > Also added Tested-by and Reviewed-by tags by Atish Patra. > > v2: https://lore.kernel.org/all/20230201160137.486622-1-rkanwal@xxxxxxxxxxxx/ > Added further details in the commit message regarding the > UART address change required in kernel cmdline parameter. > > v1: https://lore.kernel.org/all/20230124155251.1417682-1-rkanwal@xxxxxxxxxxxx/ > > hw/rtc.c | 3 +++ > hw/serial.c | 4 ++++ > riscv/include/kvm/kvm-arch.h | 8 +++++++- > 3 files changed, 14 insertions(+), 1 deletion(-) > > diff --git a/hw/rtc.c b/hw/rtc.c > index 9b8785a..da696e1 100644 > --- a/hw/rtc.c > +++ b/hw/rtc.c > @@ -9,6 +9,9 @@ > #if defined(CONFIG_ARM) || defined(CONFIG_ARM64) > #define RTC_BUS_TYPE DEVICE_BUS_MMIO > #define RTC_BASE_ADDRESS ARM_RTC_MMIO_BASE > +#elif defined(CONFIG_RISCV) > +#define RTC_BUS_TYPE DEVICE_BUS_MMIO > +#define RTC_BASE_ADDRESS RISCV_RTC_MMIO_BASE > #else > /* PORT 0070-007F - CMOS RAM/RTC (REAL TIME CLOCK) */ > #define RTC_BUS_TYPE DEVICE_BUS_IOPORT > diff --git a/hw/serial.c b/hw/serial.c > index 3d53362..b6263a0 100644 > --- a/hw/serial.c > +++ b/hw/serial.c > @@ -17,6 +17,10 @@ > #define serial_iobase(nr) (ARM_UART_MMIO_BASE + (nr) * 0x1000) > #define serial_irq(nr) (32 + (nr)) > #define SERIAL8250_BUS_TYPE DEVICE_BUS_MMIO > +#elif defined(CONFIG_RISCV) > +#define serial_iobase(nr) (RISCV_UART_MMIO_BASE + (nr) * 0x1000) > +#define serial_irq(nr) (1 + (nr)) > +#define SERIAL8250_BUS_TYPE DEVICE_BUS_MMIO > #else > #define serial_iobase_0 (KVM_IOPORT_AREA + 0x3f8) > #define serial_iobase_1 (KVM_IOPORT_AREA + 0x2f8) > diff --git a/riscv/include/kvm/kvm-arch.h b/riscv/include/kvm/kvm-arch.h > index 2cf41c5..3e7dd3e 100644 > --- a/riscv/include/kvm/kvm-arch.h > +++ b/riscv/include/kvm/kvm-arch.h > @@ -35,10 +35,16 @@ > #define RISCV_MAX_MEMORY(kvm) RISCV_LOMAP_MAX_MEMORY > #endif > > +#define RISCV_UART_MMIO_BASE RISCV_MMIO > +#define RISCV_UART_MMIO_SIZE 0x10000 > + > +#define RISCV_RTC_MMIO_BASE (RISCV_UART_MMIO_BASE + RISCV_UART_MMIO_SIZE) > +#define RISCV_RTC_MMIO_SIZE 0x10000 > + > #define KVM_IOPORT_AREA RISCV_IOPORT > #define KVM_PCI_CFG_AREA RISCV_PCI > #define KVM_PCI_MMIO_AREA (KVM_PCI_CFG_AREA + RISCV_PCI_CFG_SIZE) > -#define KVM_VIRTIO_MMIO_AREA RISCV_MMIO > +#define KVM_VIRTIO_MMIO_AREA (RISCV_RTC_MMIO_BASE + RISCV_RTC_MMIO_SIZE) > > #define KVM_IOEVENTFD_HAS_PIO 0 > > -- > 2.25.1 >
