The branch main has been updated by tijl: URL: https://cgit.FreeBSD.org/src/commit/?id=2ae0f5a4d0931067c672be9a791909f0e32d5a0e
commit 2ae0f5a4d0931067c672be9a791909f0e32d5a0e Author: Tijl Coosemans <[email protected]> AuthorDate: 2024-05-08 18:49:56 +0000 Commit: Tijl Coosemans <[email protected]> CommitDate: 2024-05-08 18:52:37 +0000 linuxkpi: Make arch_io_*_memtype_wc amd64-only Linux only implements these functions on x86. They return 0 on other architectures. The FreeBSD implementation calls PHYS_TO_DMAP but this panics on i386 because it does not have a direct map so return 0 on i386 as well for now. These functions are only used by graphics/drm-*-kmod to mark the VRAM aperture write-combining but this is also accomplished by a call to vm_phys_fictitious_reg_range so this change is sufficient to fix drm-*-kmod on i386 for FreeBSD 14.1. Reviewed by: kib MFC after: 3 days Differential Revision: https://reviews.freebsd.org/D45125 --- sys/compat/linuxkpi/common/include/linux/io.h | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/sys/compat/linuxkpi/common/include/linux/io.h b/sys/compat/linuxkpi/common/include/linux/io.h index bce70ed0cb8d..164347dbc4e7 100644 --- a/sys/compat/linuxkpi/common/include/linux/io.h +++ b/sys/compat/linuxkpi/common/include/linux/io.h @@ -541,30 +541,29 @@ void lkpi_arch_phys_wc_del(int); #define arch_phys_wc_index(x) \ (((x) < __MTRR_ID_BASE) ? -1 : ((x) - __MTRR_ID_BASE)) -#if defined(__amd64__) || defined(__i386__) || defined(__aarch64__) || defined(__powerpc__) || defined(__riscv) static inline int arch_io_reserve_memtype_wc(resource_size_t start, resource_size_t size) { +#if defined(__amd64__) vm_offset_t va; va = PHYS_TO_DMAP(start); - -#ifdef VM_MEMATTR_WRITE_COMBINING return (-pmap_change_attr(va, size, VM_MEMATTR_WRITE_COMBINING)); #else - return (-pmap_change_attr(va, size, VM_MEMATTR_UNCACHEABLE)); + return (0); #endif } static inline void arch_io_free_memtype_wc(resource_size_t start, resource_size_t size) { +#if defined(__amd64__) vm_offset_t va; va = PHYS_TO_DMAP(start); pmap_change_attr(va, size, VM_MEMATTR_WRITE_BACK); -} #endif +} #endif /* _LINUXKPI_LINUX_IO_H_ */
