[Bug 199739] with ARM_NEW_PMAP ptrace syscalls do not achieve icache consistency

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=199739

            Bug ID: 199739
           Summary: with ARM_NEW_PMAP ptrace syscalls do not achieve
                    icache consistency
           Product: Base System
           Version: 11.0-CURRENT
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: arm
          Assignee: freebsd-arm at FreeBSD.org
          Reporter: weiss at uni-mainz.de

offset in page is ignored

diff --git a/sys/arm/arm/pmap-v6-new.c b/sys/arm/arm/pmap-v6-new.c
index 53896d4..ff3fe68 100644
--- a/sys/arm/arm/pmap-v6-new.c
+++ b/sys/arm/arm/pmap-v6-new.c
@@ -6111,7 +6111,7 @@ pmap_dcache_wb_pou(vm_paddr_t pa, vm_size_t size,
vm_memattr_t ma)
        if (*sysmaps->CMAP3)
                panic("%s: CMAP3 busy", __func__);
        pte2_store(sysmaps->CMAP3, PTE2_KERN_NG(pa, PTE2_AP_KRW, ma));
-       va = (vm_offset_t)sysmaps->CADDR3;
+       va = (vm_offset_t)sysmaps->CADDR3 + (pa & PAGE_MASK);
        tlb_flush_local(va);
        dcache_wb_pou(va, size);
        pte2_clear(sysmaps->CMAP3);

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