Re: [PATCH] riscv: enable multi-range memory layout

2023-09-12 Thread Wu, Fei
On 9/5/2023 6:09 PM, Fei Wu wrote: > In order to enable PCIe passthrough on qemu riscv, the physical memory > range between 3GB and 4GB is reserved. Therefore if guest has 4GB ram, > two ranges are created as [2G, 3G) and [4G, 7G), currently u-boot sets > ram_top to 4G - 1 if the gd->ram_top is abo

Re: [PATCH] riscv: enable multi-range memory layout

2023-09-12 Thread Wu, Fei
On 9/13/2023 1:05 PM, Heinrich Schuchardt wrote: > > > Am 13. September 2023 04:23:14 MESZ schrieb "Wu, Fei" : >> On 9/5/2023 6:09 PM, Fei Wu wrote: >>> In order to enable PCIe passthrough on qemu riscv, the physical memory >>> range between 3GB and

Re: [PATCH v2] riscv: enable multi-range memory layout

2023-09-13 Thread Wu, Fei
On 9/14/2023 2:05 PM, Heinrich Schuchardt wrote: > > > Am 14. September 2023 07:30:55 MESZ schrieb Fei Wu : >> In order to enable PCIe passthrough on qemu riscv, the physical memory >> range between 3GB and 4GB is reserved. Therefore if guest has 4GB ram, >> two ranges are created as [2G, 3G) and

Re: [PATCH v2] riscv: enable multi-range memory layout

2023-09-14 Thread Wu, Fei
On 9/14/2023 2:48 PM, Wu, Fei wrote: > On 9/14/2023 2:05 PM, Heinrich Schuchardt wrote: >> >> >> Am 14. September 2023 07:30:55 MESZ schrieb Fei Wu : >>> In order to enable PCIe passthrough on qemu riscv, the physical memory >>> range between 3GB and 4GB is r

Re: [PATCH v2] riscv: enable multi-range memory layout

2023-09-14 Thread Wu, Fei
On 9/14/2023 3:20 PM, Heinrich Schuchardt wrote: > On 9/14/23 08:48, Wu, Fei wrote: >> On 9/14/2023 2:05 PM, Heinrich Schuchardt wrote: >>> >>> >>> Am 14. September 2023 07:30:55 MESZ schrieb Fei Wu : >>>> In order to enable PCIe passthrough on qe

Re: [PATCH v2] riscv: enable multi-range memory layout

2023-09-21 Thread Wu, Fei
On 9/14/2023 6:21 PM, Heinrich Schuchardt wrote: > On 9/14/23 09:42, Wu, Fei wrote: >> On 9/14/2023 3:20 PM, Heinrich Schuchardt wrote: >>> On 9/14/23 08:48, Wu, Fei wrote: >>>> On 9/14/2023 2:05 PM, Heinrich Schuchardt wrote: >>>>> >>>>&

Re: [PATCH v2] riscv: enable multi-range memory layout

2023-09-24 Thread Wu, Fei
On 9/14/2023 6:21 PM, Heinrich Schuchardt wrote: > On 9/14/23 09:42, Wu, Fei wrote: >> On 9/14/2023 3:20 PM, Heinrich Schuchardt wrote: >>> On 9/14/23 08:48, Wu, Fei wrote: >>>> On 9/14/2023 2:05 PM, Heinrich Schuchardt wrote: >>>>> >>>>&

Re: [PATCH 1/1] riscv: remove dram_init_banksize()

2023-09-26 Thread Wu, Fei
On 9/26/2023 3:16 PM, Heinrich Schuchardt wrote: > Remove dram_init_banksize() on the architecture level. > > Limiting used RAM to under 4 GiB is only necessary for CPUs which have a > DMA issue. SoC specific code already exists for FU540, FU740, JH7110. > > Not all RISC-V boards will have memory

Re: [PATCH v2] riscv: enable multi-range memory layout

2023-10-09 Thread Wu, Fei
On 9/14/2023 2:05 PM, Heinrich Schuchardt wrote: > > > Am 14. September 2023 07:30:55 MESZ schrieb Fei Wu : >> In order to enable PCIe passthrough on qemu riscv, the physical memory >> range between 3GB and 4GB is reserved. Therefore if guest has 4GB ram, >> two ranges are created as [2G, 3G) and

Re: [PATCH v2] riscv: enable multi-range memory layout

2023-10-11 Thread Wu, Fei
On 10/9/2023 6:04 PM, Wu, Fei wrote: > On 9/14/2023 2:05 PM, Heinrich Schuchardt wrote: >> >> >> Am 14. September 2023 07:30:55 MESZ schrieb Fei Wu : >>> In order to enable PCIe passthrough on qemu riscv, the physical memory >>> range between 3GB and 4GB is r

memory hole close to 4GB on qemu risc-v

2023-08-07 Thread Wu, Fei
Hi All, I am working on enabling PCIe passthrough on qemu risc-v, in order for the guest to access the host x86 pci resource directly, ram on guest won't cover this range, so if guest has 4GB ram, two ranges are created: 1. 2G-3G 2. 4G-7G u-boot is not able to handle this but reports: Reserv

Re: memory hole close to 4GB on qemu risc-v

2023-08-08 Thread Wu, Fei
On 8/7/2023 3:50 PM, Wu, Fei wrote: > Hi All, > > I am working on enabling PCIe passthrough on qemu risc-v, in order for > the guest to access the host x86 pci resource directly, ram on guest > won't cover this range, so if guest has 4GB ram, two ranges are created: >