From patchwork Mon May 11 17:29:43 2009 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beth Kon X-Patchwork-Id: 23038 Received: from vger.kernel.org (vger.kernel.org [209.132.176.167]) by demeter.kernel.org (8.14.2/8.14.2) with ESMTP id n4BHTHlV022520 for ; Mon, 11 May 2009 17:29:17 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752410AbZEKR3N (ORCPT ); Mon, 11 May 2009 13:29:13 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753460AbZEKR3N (ORCPT ); Mon, 11 May 2009 13:29:13 -0400 Received: from e5.ny.us.ibm.com ([32.97.182.145]:56819 "EHLO e5.ny.us.ibm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752410AbZEKR3M (ORCPT ); Mon, 11 May 2009 13:29:12 -0400 Received: from d01relay04.pok.ibm.com (d01relay04.pok.ibm.com [9.56.227.236]) by e5.ny.us.ibm.com (8.13.1/8.13.1) with ESMTP id n4BHO7GA027416 for ; Mon, 11 May 2009 13:24:07 -0400 Received: from d01av04.pok.ibm.com (d01av04.pok.ibm.com [9.56.224.64]) by d01relay04.pok.ibm.com (8.13.8/8.13.8/NCO v9.2) with ESMTP id n4BHTDbs179210 for ; Mon, 11 May 2009 13:29:13 -0400 Received: from d01av04.pok.ibm.com (loopback [127.0.0.1]) by d01av04.pok.ibm.com (8.12.11.20060308/8.13.3) with ESMTP id n4BHTCX2015384 for ; Mon, 11 May 2009 13:29:13 -0400 Received: from localhost.localdomain (sig-9-65-9-1.mts.ibm.com [9.65.9.1]) by d01av04.pok.ibm.com (8.12.11.20060308/8.12.11) with ESMTP id n4BHT5cj015020; Mon, 11 May 2009 13:29:08 -0400 From: Beth Kon To: avi@redhat.com Cc: kvm@vger.kernel.org, Beth Kon Subject: [PATCH 1/4] BIOS changes for configuring irq0->inti2 override (v3) Date: Mon, 11 May 2009 13:29:43 -0400 Message-Id: <1242062986-29383-1-git-send-email-eak@us.ibm.com> X-Mailer: git-send-email 1.5.4.3 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org These patches resolve the irq0->inti2 override issue, and get the hpet working on kvm. Override and HPET changes are sent as a series because HPET depends on the override. Win2k8 expects the HPET interrupt on inti2, regardless of whether an override exists in the BIOS. And the HPET spec states that in legacy mode, timer interrupt is on inti2. The irq0->inti2 override will always be used unless the kernel cannot do irq routing (i.e., compatibility with old kernels). So if the kernel is capable, userspace sets up irq0->inti2 via the irq routing interface, and adds the irq0->inti2 override to the MADT interrupt source override table, and the mp table (for the no-acpi case). A couple of months ago, Marcelo was seeing RHEL5 guests complain of invalid checksum with these patches, but later he couldn't reproduce it, and I'm not seeing it now. While all guests still need to be fully tested, everything appears to be in order. I've tested on win2k864, win2k832, RHEL5.3 32 bit, and ubuntu 8.10 64 bit. Changes from v2: - rebased on latest kvm - fixed build problems with --disable-kvm (kvm_kpit_enable/disable) Signed-off-by: Beth Kon --- To unsubscribe from this list: send the line "unsubscribe kvm" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html diff --git a/kvm/bios/rombios32.c b/kvm/bios/rombios32.c index cbd5f15..53359b8 100755 --- a/kvm/bios/rombios32.c +++ b/kvm/bios/rombios32.c @@ -444,6 +444,9 @@ uint32_t cpuid_features; uint32_t cpuid_ext_features; unsigned long ram_size; uint64_t ram_end; +#ifdef BX_QEMU +uint8_t irq0_override; +#endif #ifdef BX_USE_EBDA_TABLES unsigned long ebda_cur_addr; #endif @@ -485,6 +488,7 @@ void wrmsr_smp(uint32_t index, uint64_t val) #define QEMU_CFG_ARCH_LOCAL 0x8000 #define QEMU_CFG_ACPI_TABLES (QEMU_CFG_ARCH_LOCAL + 0) #define QEMU_CFG_SMBIOS_ENTRIES (QEMU_CFG_ARCH_LOCAL + 1) +#define QEMU_CFG_IRQ0_OVERRIDE (QEMU_CFG_ARCH_LOCAL + 2) int qemu_cfg_port; @@ -553,6 +557,18 @@ uint64_t qemu_cfg_get64 (void) } #endif +#ifdef BX_QEMU +void irq0_override_probe(void) +{ + if(qemu_cfg_port) { + qemu_cfg_select(QEMU_CFG_IRQ0_OVERRIDE); + qemu_cfg_read(&irq0_override, 1); + return; + } + memset(&irq0_override, 0, 1); +} +#endif + void cpu_probe(void) { uint32_t eax, ebx, ecx, edx; @@ -1195,6 +1211,13 @@ static void mptable_init(void) /* irqs */ for(i = 0; i < 16; i++) { +#ifdef BX_QEMU + /* One entry per ioapic interrupt destination. Destination 2 is covered + * by irq0->inti2 override (i == 0). Source IRQ 2 is unused + */ + if (irq0_override && i == 2) + continue; +#endif putb(&q, 3); /* entry type = I/O interrupt */ putb(&q, 0); /* interrupt type = vectored interrupt */ putb(&q, 0); /* flags: po=0, el=0 */ @@ -1202,7 +1225,12 @@ static void mptable_init(void) putb(&q, 0); /* source bus ID = ISA */ putb(&q, i); /* source bus IRQ */ putb(&q, ioapic_id); /* dest I/O APIC ID */ - putb(&q, i); /* dest I/O APIC interrupt in */ +#ifdef BX_QEMU + if (irq0_override && i == 0) + putb(&q, 2); /* dest I/O APIC interrupt in */ + else +#endif + putb(&q, i); /* dest I/O APIC interrupt in */ } /* patch length */ len = q - mp_config_table; @@ -1665,16 +1693,18 @@ void acpi_bios_init(void) addr = (addr + 7) & ~7; madt_addr = addr; + madt = (void *)(addr); madt_size = sizeof(*madt) + sizeof(struct madt_processor_apic) * MAX_CPUS + -#ifdef BX_QEMU - sizeof(struct madt_io_apic) /* + sizeof(struct madt_int_override) */; -#else sizeof(struct madt_io_apic); +#ifdef BX_QEMU + for (i = 0; i < 16; i++) + if (PCI_ISA_IRQ_MASK & (1U << i)) + madt_size += sizeof(struct madt_int_override); + if (irq0_override) + madt_size += sizeof(struct madt_int_override); #endif - madt = (void *)(addr); addr += madt_size; - #ifdef BX_QEMU #ifdef HPET_WORKS_IN_KVM addr = (addr + 7) & ~7; @@ -1758,23 +1788,20 @@ void acpi_bios_init(void) io_apic->io_apic_id = smp_cpus; io_apic->address = cpu_to_le32(0xfec00000); io_apic->interrupt = cpu_to_le32(0); + int_override = (struct madt_int_override*)(io_apic + 1); #ifdef BX_QEMU -#ifdef HPET_WORKS_IN_KVM - io_apic++; - - int_override = (void *)io_apic; - int_override->type = APIC_XRUPT_OVERRIDE; - int_override->length = sizeof(*int_override); - int_override->bus = cpu_to_le32(0); - int_override->source = cpu_to_le32(0); - int_override->gsi = cpu_to_le32(2); - int_override->flags = cpu_to_le32(0); -#endif + if (irq0_override) { + memset(int_override, 0, sizeof(*int_override)); + int_override->type = APIC_XRUPT_OVERRIDE; + int_override->length = sizeof(*int_override); + int_override->source = 0; + int_override->gsi = 2; + int_override->flags = 0; /* conforms to bus specifications */ + int_override++; + } #endif - - int_override = (struct madt_int_override*)(io_apic + 1); for ( i = 0; i < 16; i++ ) { - if ( PCI_ISA_IRQ_MASK & (1U << i) ) { + if (PCI_ISA_IRQ_MASK & (1U << i)) { memset(int_override, 0, sizeof(*int_override)); int_override->type = APIC_XRUPT_OVERRIDE; int_override->length = sizeof(*int_override); @@ -1786,7 +1813,6 @@ void acpi_bios_init(void) continue; } int_override++; - madt_size += sizeof(struct madt_int_override); } acpi_build_table_header((struct acpi_table_header *)madt, "APIC", madt_size, 1); @@ -2697,6 +2723,9 @@ void rombios32_init(uint32_t *s3_resume_vector, uint8_t *shutdown_flag) if (bios_table_cur_addr != 0) { +#ifdef BX_QEMU + irq0_override_probe(); +#endif mptable_init(); smbios_init();