From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:44073) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YYfam-0001wY-Gm for qemu-devel@nongnu.org; Thu, 19 Mar 2015 14:54:53 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1YYfag-0002iv-9I for qemu-devel@nongnu.org; Thu, 19 Mar 2015 14:54:52 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51982) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1YYfag-0002ii-2J for qemu-devel@nongnu.org; Thu, 19 Mar 2015 14:54:46 -0400 From: Marcel Apfelbaum Date: Thu, 19 Mar 2015 20:52:53 +0200 Message-Id: <1426791181-23831-19-git-send-email-marcel@redhat.com> In-Reply-To: <1426791181-23831-1-git-send-email-marcel@redhat.com> References: <1426791181-23831-1-git-send-email-marcel@redhat.com> Subject: [Qemu-devel] [PATCH V6 for-2.3 18/26] hw/acpi: remove from root bus 0 the crs resources used by other busses. List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: kraxel@redhat.com, mst@redhat.com, quintela@redhat.com, agraf@suse.de, marcel@redhat.com, alex.williamson@redhat.com, kevin@koconnor.net, hare@suse.de, imammedo@redhat.com, amit.shah@redhat.com, pbonzini@redhat.com, leon.alrae@imgtec.com, aurelien@aurel32.net, rth@twiddle.net If multiple root busses are used, root bus 0 cannot use all the pci holes ranges. Remove the IO/mem ranges used by the other primary busses. Signed-off-by: Marcel Apfelbaum --- hw/i386/acpi-build.c | 90 ++++++++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 77 insertions(+), 13 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index fe9bb5c..ab7ebeb 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -756,6 +756,50 @@ static void crs_range_free(gpointer data) g_free(entry); } +static gint crs_range_compare(gconstpointer a, gconstpointer b) +{ + CrsRangeEntry *entry_a = *(CrsRangeEntry **)a; + CrsRangeEntry *entry_b = *(CrsRangeEntry **)b; + + return (int64_t)entry_a->base - (int64_t)entry_b->base; +} + +/* + * crs_replace_with_free_ranges - given the 'used' ranges within [start - end] + * interval, computes the 'free' ranges from the same interval. + * Example: If the input array is { [a1 - a2],[b1 - b2] }, the function + * will return { [base - a1], [a2 - b1], [b2 - limit] }. + */ +static void crs_replace_with_free_ranges(GPtrArray *ranges, + uint64_t start, uint64_t end) +{ + GPtrArray *free_ranges = g_ptr_array_new_with_free_func(crs_range_free); + uint64_t free_base = start; + int i; + + g_ptr_array_sort(ranges, crs_range_compare); + for (i = 0; i < ranges->len; i++) { + CrsRangeEntry *used = g_ptr_array_index(ranges, i); + + if (free_base < used->base) { + crs_range_insert(free_ranges, free_base, used->base - 1); + } + + free_base = used->limit + 1; + } + + if (free_base < end) { + crs_range_insert(free_ranges, free_base, end); + } + + g_ptr_array_set_size(ranges, 0); + for (i = 0; i < free_ranges->len; i++) { + g_ptr_array_add(ranges, g_ptr_array_index(free_ranges, i)); + } + + g_ptr_array_free(free_ranges, false); +} + static Aml *build_crs(PCIHostState *host, GPtrArray *io_ranges, GPtrArray *mem_ranges) { @@ -877,6 +921,8 @@ build_ssdt(GArray *table_data, GArray *linker, PCIHostState *snooped_host; GPtrArray *io_ranges = g_ptr_array_new_with_free_func(crs_range_free); GPtrArray *mem_ranges = g_ptr_array_new_with_free_func(crs_range_free); + CrsRangeEntry *entry; + int root_bus_limit = 0xFF; int i; ssdt = init_aml_allocator(); @@ -899,6 +945,10 @@ build_ssdt(GArray *table_data, GArray *linker, PCIHostState *host = g_ptr_array_index(snooping_hosts, i); uint8_t bus_num = pci_bus_num(host->bus); + if (bus_num < root_bus_limit) { + root_bus_limit = bus_num - 1; + } + scope = aml_scope("\\_SB"); dev = aml_device("PC%.02X", bus_num); aml_append(dev, @@ -911,9 +961,6 @@ build_ssdt(GArray *table_data, GArray *linker, aml_append(scope, dev); aml_append(ssdt, scope); } - - g_ptr_array_free(io_ranges, true); - g_ptr_array_free(mem_ranges, true); } scope = aml_scope("\\_SB.PCI0"); @@ -921,26 +968,40 @@ build_ssdt(GArray *table_data, GArray *linker, crs = aml_resource_template(); aml_append(crs, aml_word_bus_number(aml_min_fixed, aml_max_fixed, aml_pos_decode, - 0x0000, 0x0000, 0x00FF, 0x0000, 0x0100)); + 0x0000, 0x0, root_bus_limit, + 0x0000, root_bus_limit + 1)); aml_append(crs, aml_io(aml_decode16, 0x0CF8, 0x0CF8, 0x01, 0x08)); aml_append(crs, aml_word_io(aml_min_fixed, aml_max_fixed, aml_pos_decode, aml_entire_range, 0x0000, 0x0000, 0x0CF7, 0x0000, 0x0CF8)); - aml_append(crs, - aml_word_io(aml_min_fixed, aml_max_fixed, - aml_pos_decode, aml_entire_range, - 0x0000, 0x0D00, 0xFFFF, 0x0000, 0xF300)); + + crs_replace_with_free_ranges(io_ranges, 0x0D00, 0xFFFF); + for (i = 0; i < io_ranges->len; i++) { + entry = g_ptr_array_index(io_ranges, i); + aml_append(crs, + aml_word_io(aml_min_fixed, aml_max_fixed, + aml_pos_decode, aml_entire_range, + 0x0000, entry->base, entry->limit, + 0x0000, entry->limit - entry->base + 1)); + } + aml_append(crs, aml_dword_memory(aml_pos_decode, aml_min_fixed, aml_max_fixed, aml_cacheable, aml_ReadWrite, 0, 0x000A0000, 0x000BFFFF, 0, 0x00020000)); - aml_append(crs, - aml_dword_memory(aml_pos_decode, aml_min_fixed, aml_max_fixed, - aml_non_cacheable, aml_ReadWrite, - 0, pci->w32.begin, pci->w32.end - 1, 0, - pci->w32.end - pci->w32.begin)); + + crs_replace_with_free_ranges(mem_ranges, pci->w32.begin, pci->w32.end - 1); + for (i = 0; i < mem_ranges->len; i++) { + entry = g_ptr_array_index(mem_ranges, i); + aml_append(crs, + aml_dword_memory(aml_pos_decode, aml_min_fixed, aml_max_fixed, + aml_non_cacheable, aml_ReadWrite, + 0, entry->base, entry->limit, + 0, entry->limit - entry->base + 1)); + } + if (pci->w64.begin) { aml_append(crs, aml_qword_memory(aml_pos_decode, aml_min_fixed, aml_max_fixed, @@ -963,6 +1024,9 @@ build_ssdt(GArray *table_data, GArray *linker, aml_append(dev, aml_name_decl("_CRS", crs)); aml_append(scope, dev); + g_ptr_array_free(io_ranges, true); + g_ptr_array_free(mem_ranges, true); + /* reserve PCIHP resources */ if (pm->pcihp_io_len) { dev = aml_device("PHPR"); -- 2.1.0