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[34.145.178.123]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-4531c28fdcfsm32182061cf.90.2024.08.13.06.39.52 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Aug 2024 06:39:53 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1723556394; x=1724161194; darn=nongnu.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=8bOAUGZjIIqU5739GPNz9+frCjJL8Hao2by0kB1Z2nI=; b=jSyQbDh5E8ZPRwI0NplBTEnfWleFTfghvcSP7oOh97m/EC96o1EuomEtLZTEXZ9uN4 VkO2f7ChgO7yGPfW7+IT2cEcQa6uTXQAdRAERwk5M15gMgaLdbyr8xkJ8o+wm0QQ9RfH GTmACyIYPU82qNo+8zNClafFXEyLfJOL2c31I= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1723556394; x=1724161194; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=8bOAUGZjIIqU5739GPNz9+frCjJL8Hao2by0kB1Z2nI=; b=iALvs/qpkj3/T+cd/qB35B7wjAVbK25Gj4VL3p4EZxVHuxITeQFxfAKyXq5cMxcKld CVrucVKfkFd8EhxDjvu/xXicpWNnlM9L0VH01SHM4U/opBQpqsA1im4TueSR6ZPWgeK6 fX80wexawVLojFmmP5w3YeYdpj4NO/9ihdk8GKWf8ZuFafsncXAKrUTxqlpJTND2mVxu QkXQ8T9mYUinCl2aq/jO+d/sSLkX7fn9squBkijvgSkzDLvHWUU39jPV4EkjtHGKPmXu AeKejxcu14x47BBHeDO8tqNS4IXLpvumoswfb3UvGed0DY8593dsCL3HAabTGfFsnqmY 1X7A== X-Forwarded-Encrypted: i=1; AJvYcCV9VL44lif5na4sJsZcbG7+atHrJRFzpCWVOOmjagOeiKCo9yxwDC+KGxKMnjvsgLSLDIPfPuFcmmAFP3Xg/H5sdKUCklE= X-Gm-Message-State: AOJu0Yy8sKVDfEycSIuxAltsdpLkxiKzwsmxwUOgh7xyS/v97Iv/3xS8 gnd8GmFX3uIVuavhdFozDp/Hj3Nu89VwcpuYjy3CSRbmM78adwqRgJfbXqPpTQ== X-Google-Smtp-Source: AGHT+IHzl6U4fg7NDYLvcrduu/jOZ38lQjdvj60cycv4kx7dF5jMaSGQOKoh1lwePlGyqfKcsjF1qA== X-Received: by 2002:a05:622a:4acf:b0:44f:eb6d:d6db with SMTP id d75a77b69052e-45349bc3f4bmr42578031cf.58.1723556393628; Tue, 13 Aug 2024 06:39:53 -0700 (PDT) From: Ricardo Ribalda To: "Michael S. Tsirkin" , Igor Mammedov , Ani Sinha , Marcel Apfelbaum , Paolo Bonzini , Richard Henderson , Eduardo Habkost , qemu-devel@nongnu.org, Andrea Righi Cc: Ricardo Ribalda Subject: [PATCH v4 2/3] hw/i386/acpi-build: Return a pre-computed _PRT table Date: Tue, 13 Aug 2024 13:39:13 +0000 Message-ID: <20240813133936.1175467-3-ribalda@chromium.org> X-Mailer: git-send-email 2.46.0.76.ge559c4bf1a-goog In-Reply-To: <20240813133936.1175467-1-ribalda@chromium.org> References: <20240813133936.1175467-1-ribalda@chromium.org> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=2607:f8b0:4864:20::82c; envelope-from=ribalda@chromium.org; helo=mail-qt1-x82c.google.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.125, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @chromium.org) X-ZM-MESSAGEID: 1723556452032116600 Content-Type: text/plain; charset="utf-8" When qemu runs without kvm acceleration the ACPI executions take a great amount of time. If they take more than the default time (30sec), the ACPI calls fail and the system might not behave correctly. Now the _PRT table is computed on the fly. We can drastically reduce the execution of the _PRT method if we return a pre-computed table. Without this patch: [ 51.343484] ACPI Error: Aborting method \_SB.PCI0._PRT due to previous e= rror (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529) [ 51.527032] ACPI Error: Method execution failed \_SB.PCI0._PRT due to pr= evious error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68) [ 51.530049] virtio-pci 0000:00:02.0: can't derive routing for PCI INT A [ 51.530797] virtio-pci 0000:00:02.0: PCI INT A: no GSI [ 81.922901] ACPI Error: Aborting method \_SB.PCI0._PRT due to previous e= rror (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529) [ 82.103534] ACPI Error: Method execution failed \_SB.PCI0._PRT due to pr= evious error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68) [ 82.106088] virtio-pci 0000:00:04.0: can't derive routing for PCI INT A [ 82.106761] virtio-pci 0000:00:04.0: PCI INT A: no GSI [ 112.192568] ACPI Error: Aborting method \_SB.PCI0._PRT due to previous e= rror (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529) [ 112.486687] ACPI Error: Method execution failed \_SB.PCI0._PRT due to pr= evious error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68) [ 112.489554] virtio-pci 0000:00:05.0: can't derive routing for PCI INT A [ 112.490027] virtio-pci 0000:00:05.0: PCI INT A: no GSI [ 142.559448] ACPI Error: Aborting method \_SB.PCI0._PRT due to previous e= rror (AE_AML_LOOP_TIMEOUT) (20230628/psparse-529) [ 142.718596] ACPI Error: Method execution failed \_SB.PCI0._PRT due to pr= evious error (AE_AML_LOOP_TIMEOUT) (20230628/uteval-68) [ 142.722889] virtio-pci 0000:00:06.0: can't derive routing for PCI INT A [ 142.724578] virtio-pci 0000:00:06.0: PCI INT A: no GSI With this patch: [ 22.938076] ACPI: \_SB_.LNKB: Enabled at IRQ 10 [ 24.214002] ACPI: \_SB_.LNKD: Enabled at IRQ 11 [ 25.465170] ACPI: \_SB_.LNKA: Enabled at IRQ 10 [ 27.944920] ACPI: \_SB_.LNKC: Enabled at IRQ 11 ACPI disassembly: Scope (PCI0) { Method (_PRT, 0, NotSerialized) // _PRT: PCI Routing Table { Return (Package (0x80) { Package (0x04) { 0xFFFF, Zero, LNKD, Zero }, Package (0x04) { 0xFFFF, One, LNKA, Zero }, Package (0x04) { 0xFFFF, 0x02, LNKB, Zero }, Package (0x04) { 0xFFFF, 0x03, LNKC, Zero }, Package (0x04) { 0x0001FFFF, Zero, LNKS, Zero }, Context: https://lore.kernel.org/virtualization/20240417145544.38d7b482@ima= mmedo.users.ipa.redhat.com/T/#t Reviewed-by: Igor Mammedov Signed-off-by: Ricardo Ribalda Reviewed-by: Richard Henderson --- hw/i386/acpi-build.c | 120 ++++++++----------------------------------- 1 file changed, 22 insertions(+), 98 deletions(-) diff --git a/hw/i386/acpi-build.c b/hw/i386/acpi-build.c index 5d4bd2b710..b4e25551e0 100644 --- a/hw/i386/acpi-build.c +++ b/hw/i386/acpi-build.c @@ -724,120 +724,44 @@ static Aml *aml_pci_pdsm(void) return method; } =20 -/** - * build_prt_entry: - * @link_name: link name for PCI route entry - * - * build AML package containing a PCI route entry for @link_name - */ -static Aml *build_prt_entry(const char *link_name) -{ - Aml *a_zero =3D aml_int(0); - Aml *pkg =3D aml_package(4); - aml_append(pkg, a_zero); - aml_append(pkg, a_zero); - aml_append(pkg, aml_name("%s", link_name)); - aml_append(pkg, a_zero); - return pkg; -} - /* - * initialize_route - Initialize the interrupt routing rule - * through a specific LINK: - * if (lnk_idx =3D=3D idx) - * route using link 'link_name' - */ -static Aml *initialize_route(Aml *route, const char *link_name, - Aml *lnk_idx, int idx) -{ - Aml *if_ctx =3D aml_if(aml_equal(lnk_idx, aml_int(idx))); - Aml *pkg =3D build_prt_entry(link_name); - - aml_append(if_ctx, aml_store(pkg, route)); - - return if_ctx; -} - -/* - * build_prt - Define interrupt rounting rules + * build_prt - Define interrupt routing rules * * Returns an array of 128 routes, one for each device, * based on device location. * The main goal is to equally distribute the interrupts * over the 4 existing ACPI links (works only for i440fx). - * The hash function is (slot + pin) & 3 -> "LNK[D|A|B|C]". + * The hash function is: (slot + pin) & 3 -> "LNK[D|A|B|C]". * */ static Aml *build_prt(bool is_pci0_prt) { - Aml *method, *while_ctx, *pin, *res; + const int nroutes =3D 128; + Aml *rt_pkg, *method; + int pin; =20 method =3D aml_method("_PRT", 0, AML_NOTSERIALIZED); - res =3D aml_local(0); - pin =3D aml_local(1); - aml_append(method, aml_store(aml_package(128), res)); - aml_append(method, aml_store(aml_int(0), pin)); + rt_pkg =3D aml_varpackage(nroutes); =20 - /* while (pin < 128) */ - while_ctx =3D aml_while(aml_lless(pin, aml_int(128))); - { - Aml *slot =3D aml_local(2); - Aml *lnk_idx =3D aml_local(3); - Aml *route =3D aml_local(4); - - /* slot =3D pin >> 2 */ - aml_append(while_ctx, - aml_store(aml_shiftright(pin, aml_int(2), NULL), slot)); - /* lnk_idx =3D (slot + pin) & 3 */ - aml_append(while_ctx, - aml_store(aml_and(aml_add(pin, slot, NULL), aml_int(3), NULL), - lnk_idx)); - - /* route[2] =3D "LNK[D|A|B|C]", selection based on pin % 3 */ - aml_append(while_ctx, initialize_route(route, "LNKD", lnk_idx, 0)); - if (is_pci0_prt) { - Aml *if_device_1, *if_pin_4, *else_pin_4; - - /* device 1 is the power-management device, needs SCI */ - if_device_1 =3D aml_if(aml_equal(lnk_idx, aml_int(1))); - { - if_pin_4 =3D aml_if(aml_equal(pin, aml_int(4))); - { - aml_append(if_pin_4, - aml_store(build_prt_entry("LNKS"), route)); - } - aml_append(if_device_1, if_pin_4); - else_pin_4 =3D aml_else(); - { - aml_append(else_pin_4, - aml_store(build_prt_entry("LNKA"), route)); - } - aml_append(if_device_1, else_pin_4); - } - aml_append(while_ctx, if_device_1); + for (pin =3D 0; pin < nroutes; pin++) { + Aml *pkg =3D aml_package(4); + int slot =3D pin >> 2; + + aml_append(pkg, aml_int((slot << 16) | 0xFFFF)); + aml_append(pkg, aml_int(pin & 3)); + /* device 1 is the power-management device, needs SCI */ + if (is_pci0_prt && pin =3D=3D 4) { + aml_append(pkg, aml_name("%s", "LNKS")); } else { - aml_append(while_ctx, initialize_route(route, "LNKA", lnk_idx,= 1)); + const char link_name[][5] =3D {"LNKD", "LNKA", "LNKB", "LNKC"}; + int hash =3D (slot + pin) & 3; + aml_append(pkg, aml_name("%s", link_name[hash])); } - aml_append(while_ctx, initialize_route(route, "LNKB", lnk_idx, 2)); - aml_append(while_ctx, initialize_route(route, "LNKC", lnk_idx, 3)); - - /* route[0] =3D 0x[slot]FFFF */ - aml_append(while_ctx, - aml_store(aml_or(aml_shiftleft(slot, aml_int(16)), aml_int(0xF= FFF), - NULL), - aml_index(route, aml_int(0)))); - /* route[1] =3D pin & 3 */ - aml_append(while_ctx, - aml_store(aml_and(pin, aml_int(3), NULL), - aml_index(route, aml_int(1)))); - /* res[pin] =3D route */ - aml_append(while_ctx, aml_store(route, aml_index(res, pin))); - /* pin++ */ - aml_append(while_ctx, aml_increment(pin)); + aml_append(pkg, aml_int(0)); + aml_append(rt_pkg, pkg); } - aml_append(method, while_ctx); - /* return res*/ - aml_append(method, aml_return(res)); + + aml_append(method, aml_return(rt_pkg)); =20 return method; } --=20 2.46.0.76.ge559c4bf1a-goog