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Control of types of invlidation is left for when s/invlidation/invalidation/ > usecases turn up. For now everything is Clean and Invalidate. > > Signed-off-by: Yicong Yang > Signed-off-by: Jonathan Cameron > --- > arch/x86/mm/pat/set_memory.c | 2 +- > drivers/cxl/core/region.c | 6 +++++- > drivers/nvdimm/region.c | 3 ++- > drivers/nvdimm/region_devs.c | 3 ++- > include/linux/memregion.h | 8 ++++++-- > 5 files changed, 16 insertions(+), 6 deletions(-) > > diff --git a/arch/x86/mm/pat/set_memory.c b/arch/x86/mm/pat/set_memory.c > index 46edc11726b7..8b39aad22458 100644 > --- a/arch/x86/mm/pat/set_memory.c > +++ b/arch/x86/mm/pat/set_memory.c > @@ -368,7 +368,7 @@ bool cpu_cache_has_invalidate_memregion(void) > } > EXPORT_SYMBOL_NS_GPL(cpu_cache_has_invalidate_memregion, "DEVMEM"); > > -int cpu_cache_invalidate_memregion(int res_desc) > +int cpu_cache_invalidate_memregion(int res_desc, phys_addr_t start, size_t len) > { > if (WARN_ON_ONCE(!cpu_cache_has_invalidate_memregion())) > return -ENXIO; > diff --git a/drivers/cxl/core/region.c b/drivers/cxl/core/region.c > index 6e5e1460068d..6e6e8ace0897 100644 > --- a/drivers/cxl/core/region.c > +++ b/drivers/cxl/core/region.c > @@ -237,7 +237,11 @@ static int cxl_region_invalidate_memregion(struct cxl_region *cxlr) > return -ENXIO; > } > > - cpu_cache_invalidate_memregion(IORES_DESC_CXL); > + if (!cxlr->params.res) > + return -ENXIO; > + cpu_cache_invalidate_memregion(IORES_DESC_CXL, > + cxlr->params.res->start, > + resource_size(cxlr->params.res)); So lets abandon the never used @res_desc argument. It was originally there for documentation and the idea that with HDM-DB CXL invalidation could be triggered from the device. However, that never came to pass, and the continued existence of the option is confusing especially if the range may not be a strict subset of the res_desc. Alternatively, keep the @res_desc parameter and have the backend lookup the ranges to flush from the descriptor, but I like that option less.