From 1321117200de1d1796adad856f7e04a66850e992 Mon Sep 17 00:00:00 2001 From: Mark Johnston Date: Tue, 1 Mar 2022 09:06:42 -0500 Subject: [PATCH] riscv: Handle four-level page tables in various pmap traversal routines Reviewed by: jhb MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D34278 --- sys/riscv/riscv/pmap.c | 48 ++++++++++++++++++++++++++++++++++++------ 1 file changed, 42 insertions(+), 6 deletions(-) diff --git a/sys/riscv/riscv/pmap.c b/sys/riscv/riscv/pmap.c index aaaccfec4fe..6e69fec6365 100644 --- a/sys/riscv/riscv/pmap.c +++ b/sys/riscv/riscv/pmap.c @@ -2187,7 +2187,7 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva) struct spglist free; struct rwlock *lock; vm_offset_t va, va_next; - pd_entry_t *l1, *l2, l2e; + pd_entry_t *l0, *l1, *l2, l2e; pt_entry_t *l3; /* @@ -2206,7 +2206,19 @@ pmap_remove(pmap_t pmap, vm_offset_t sva, vm_offset_t eva) if (pmap->pm_stats.resident_count == 0) break; - l1 = pmap_l1(pmap, sva); + if (pmap_mode == PMAP_MODE_SV48) { + l0 = pmap_l0(pmap, sva); + if (pmap_load(l0) == 0) { + va_next = (sva + L0_SIZE) & ~L0_OFFSET; + if (va_next < sva) + va_next = eva; + continue; + } + l1 = pmap_l0_to_l1(l0, sva); + } else { + l1 = pmap_l1(pmap, sva); + } + if (pmap_load(l1) == 0) { va_next = (sva + L1_SIZE) & ~L1_OFFSET; if (va_next < sva) @@ -2357,7 +2369,7 @@ pmap_remove_all(vm_page_t m) void pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) { - pd_entry_t *l1, *l2, l2e; + pd_entry_t *l0, *l1, *l2, l2e; pt_entry_t *l3, l3e, mask; vm_page_t m, mt; vm_paddr_t pa; @@ -2383,7 +2395,19 @@ pmap_protect(pmap_t pmap, vm_offset_t sva, vm_offset_t eva, vm_prot_t prot) resume: PMAP_LOCK(pmap); for (; sva < eva; sva = va_next) { - l1 = pmap_l1(pmap, sva); + if (pmap_mode == PMAP_MODE_SV48) { + l0 = pmap_l0(pmap, sva); + if (pmap_load(l0) == 0) { + va_next = (sva + L0_SIZE) & ~L0_OFFSET; + if (va_next < sva) + va_next = eva; + continue; + } + l1 = pmap_l0_to_l1(l0, sva); + } else { + l1 = pmap_l1(pmap, sva); + } + if (pmap_load(l1) == 0) { va_next = (sva + L1_SIZE) & ~L1_OFFSET; if (va_next < sva) @@ -3334,7 +3358,7 @@ void pmap_unwire(pmap_t pmap, vm_offset_t sva, vm_offset_t eva) { vm_offset_t va_next; - pd_entry_t *l1, *l2, l2e; + pd_entry_t *l0, *l1, *l2, l2e; pt_entry_t *l3, l3e; bool pv_lists_locked; @@ -3342,7 +3366,19 @@ pmap_unwire(pmap_t pmap, vm_offset_t sva, vm_offset_t eva) retry: PMAP_LOCK(pmap); for (; sva < eva; sva = va_next) { - l1 = pmap_l1(pmap, sva); + if (pmap_mode == PMAP_MODE_SV48) { + l0 = pmap_l0(pmap, sva); + if (pmap_load(l0) == 0) { + va_next = (sva + L0_SIZE) & ~L0_OFFSET; + if (va_next < sva) + va_next = eva; + continue; + } + l1 = pmap_l0_to_l1(l0, sva); + } else { + l1 = pmap_l1(pmap, sva); + } + if (pmap_load(l1) == 0) { va_next = (sva + L1_SIZE) & ~L1_OFFSET; if (va_next < sva) -- 2.45.0