From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:52392) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1gX6Mc-0000tc-C2 for qemu-devel@nongnu.org; Wed, 12 Dec 2018 10:23:58 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1gX6MZ-0000HX-9T for qemu-devel@nongnu.org; Wed, 12 Dec 2018 10:23:54 -0500 Received: from mail-wm1-x336.google.com ([2a00:1450:4864:20::336]:38516) by eggs.gnu.org with esmtps (TLS1.0:RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1gX6MY-0008Rd-HN for qemu-devel@nongnu.org; Wed, 12 Dec 2018 10:23:50 -0500 Received: by mail-wm1-x336.google.com with SMTP id m22so6399228wml.3 for ; Wed, 12 Dec 2018 07:23:31 -0800 (PST) Received: from 640k.lan ([93.56.166.5]) by smtp.gmail.com with ESMTPSA id u10sm15878859wrr.33.2018.12.12.07.23.29 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Wed, 12 Dec 2018 07:23:29 -0800 (PST) Sender: Paolo Bonzini From: Paolo Bonzini Date: Wed, 12 Dec 2018 16:22:31 +0100 Message-Id: <1544628195-37728-11-git-send-email-pbonzini@redhat.com> In-Reply-To: <1544628195-37728-1-git-send-email-pbonzini@redhat.com> References: <1544628195-37728-1-git-send-email-pbonzini@redhat.com> Subject: [Qemu-devel] [PULL 10/54] memory: update coalesced_range on transaction_commit List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org The e1000 driver calls memory_region_add_coalescing but kvm_coalesce_mmio_region is never called for those regions. The bug dates back to the introduction of the memory region API; to fix it, delete and re-add coalesced MMIO ranges when building the FlatViews. Because coalesced MMIO regions apply to all address spaces, the has_coalesced_range flag has to be changed into an int. Fixes: 093bc2cd885e ("Hierarchical memory region API") Reported-by: Atsushi Nemoto Signed-off-by: Paolo Bonzini --- memory.c | 20 ++++++++++++++++---- 1 file changed, 16 insertions(+), 4 deletions(-) diff --git a/memory.c b/memory.c index 072769a..5759f74 100644 --- a/memory.c +++ b/memory.c @@ -217,7 +217,7 @@ struct FlatRange { bool romd_mode; bool readonly; bool nonvolatile; - bool has_coalesced_range; + int has_coalesced_range; }; #define FOR_EACH_FLAT_RANGE(var, view) \ @@ -651,7 +651,7 @@ static void render_memory_region(FlatView *view, fr.romd_mode = mr->romd_mode; fr.readonly = readonly; fr.nonvolatile = nonvolatile; - fr.has_coalesced_range = false; + fr.has_coalesced_range = 0; /* Render the region itself into any gaps left by the current view. */ for (i = 0; i < view->nr && int128_nz(remain); ++i) { @@ -858,6 +858,10 @@ static void flat_range_coalesced_io_del(FlatRange *fr, AddressSpace *as) return; } + if (--fr->has_coalesced_range > 0) { + return; + } + MEMORY_LISTENER_UPDATE_REGION(fr, as, Reverse, coalesced_io_del, int128_get64(fr->addr.start), int128_get64(fr->addr.size)); @@ -873,7 +877,10 @@ static void flat_range_coalesced_io_add(FlatRange *fr, AddressSpace *as) return; } - fr->has_coalesced_range = true; + if (fr->has_coalesced_range++) { + return; + } + QTAILQ_FOREACH(cmr, &mr->coalesced, link) { tmp = addrrange_shift(cmr->addr, int128_sub(fr->addr.start, @@ -920,6 +927,7 @@ static void address_space_update_topology_pass(AddressSpace *as, /* In old but not in new, or in both but attributes changed. */ if (!adding) { + flat_range_coalesced_io_del(frold, as); MEMORY_LISTENER_UPDATE_REGION(frold, as, Reverse, region_del); } @@ -927,7 +935,9 @@ static void address_space_update_topology_pass(AddressSpace *as, } else if (frold && frnew && flatrange_equal(frold, frnew)) { /* In both and unchanged (except logging may have changed) */ - if (adding) { + if (!adding) { + flat_range_coalesced_io_del(frold, as); + } else { MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_nop); if (frnew->dirty_log_mask & ~frold->dirty_log_mask) { MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, log_start, @@ -939,6 +949,7 @@ static void address_space_update_topology_pass(AddressSpace *as, frold->dirty_log_mask, frnew->dirty_log_mask); } + flat_range_coalesced_io_add(frnew, as); } ++iold; @@ -948,6 +959,7 @@ static void address_space_update_topology_pass(AddressSpace *as, if (adding) { MEMORY_LISTENER_UPDATE_REGION(frnew, as, Forward, region_add); + flat_range_coalesced_io_add(frnew, as); } ++inew; -- 1.8.3.1