On 11/14/24 08:01, Richard Henderson wrote:
Before, if !enable, we squashed the entire address comparator to -1. This works because TLB_INVALID_MASK is set. It seemed natural, because the tlb is cleared with memset of 0xff.With this patch, we retain all of the other TLB_* bits even when the page is not enabled. This works because TLB_INVALID_MASK is set. This will be used in a subsequent patch; the addr_read comparator contains the flags for pages that are executable but not readable. Signed-off-by: Richard Henderson <richard.hender...@linaro.org> --- accel/tcg/cputlb.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/accel/tcg/cputlb.c b/accel/tcg/cputlb.c index ae3a99eb47..585f4171cc 100644 --- a/accel/tcg/cputlb.c +++ b/accel/tcg/cputlb.c @@ -1032,15 +1032,13 @@ static inline void tlb_set_compare(CPUTLBEntryFull *full, CPUTLBEntry *ent, vaddr address, int flags, MMUAccessType access_type, bool enable) { - if (enable) { - address |= flags & TLB_FLAGS_MASK; - flags &= TLB_SLOW_FLAGS_MASK; - if (flags) { - address |= TLB_FORCE_SLOW; - } - } else { - address = -1; - flags = 0; + if (!enable) { + address = TLB_INVALID_MASK; + } + address |= flags & TLB_FLAGS_MASK; + flags &= TLB_SLOW_FLAGS_MASK; + if (flags) { + address |= TLB_FORCE_SLOW; } ent->addr_idx[access_type] = address; full->slow_flags[access_type] = flags;
Good that you extracted that from original patch, it's much more clear now. Reviewed-by: Pierrick Bouvier <pierrick.bouv...@linaro.org>
