SeaBIOS May 2010

seabios@seabios.org

14 participants
22 discussions

Re: [SeaBIOS] [Qemu-devel] SeaBIOS error with Juniper FreeBSD kernel
by Kevin O'Connor 11 Jul '11

11 Jul '11

On Sun, Feb 21, 2010 at 04:18:38PM -0700, Brandon Bennett wrote: > > On Sat, Feb 20, 2010 at 9:05 PM, Kevin O'Connor <kevin(a)koconnor.net> wrote: > >> Should a kernel fail during boot, I'd suspect it doesn't like one of > >> the apm/pcibios callbacks, or it doesn't like one of the > >> smbios/mptable/acpi tables. You could try compiling the SeaBIOS code > >> (see http://seabios.org/Download ) and increasing the debugging by > >> modifying src/config.h. Specifically, you could increase > >> CONFIG_DEBUG_LEVEL, and set DEBUG_HDL_pcibios32 and DEBUG_HDL_apm to > >> 1. Also, you could try disabling some of the features to see if that > >> prevents the fault (eg, disabling CONFIG_ACPI / CONFIG_SMBIOS / > >> CONFIG_MPTABLE). > > > > I have narrowed it down to SMBIOS. If I disable CONFIG_SMBIOS the > image boots up fine. Gleb, have you seen this thread? Some of the recent changes to smbios that look like possible culprits are: Make SMBIOS table pass MS SVVP test Use MaxCountCPUs during building of per cpu tables. Add malloc_high/fseg() and rework bios table creation to use them. There were other changes, but the comments indicate they were only ports of changes already in bochs. I suppose it's also possible the lack of smbios is turning off some other feature in the guest (eg, acpi) that's the real culprit. -Kevin

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[PATCH] seabios: remove iasl output file when error.
by Isaku Yamahata 11 Jun '10

11 Jun '10

Surprisingly iasl creates output file even when compilation error. So typing make after an error will succeed. This patch prevents it by removing the output file when error. And adds related dependencies to compile when .hex is missing. Signed-off-by: Isaku Yamahata <yamahata(a)valinux.co.jp> --- Makefile | 13 +++++++++---- 1 files changed, 9 insertions(+), 4 deletions(-) diff --git a/Makefile b/Makefile index 72d711d..d69c630 100644 --- a/Makefile +++ b/Makefile @@ -184,11 +184,16 @@ $(OUT)vgabios.bin: $(OUT)vgabios.bin.raw tools/buildrom.py $(Q)./tools/buildrom.py $< $@ ####### dsdt build rules -src/acpi-dsdt.hex: src/acpi-dsdt.dsl +$(OUT)%.dsl.i: src/%.dsl + $(Q)cpp -P $< > $@ + +src/%.hex: $(OUT)%.dsl.i @echo "Compiling DSDT" - $(Q)cpp -P $< > $(OUT)acpi-dsdt.dsl.i - $(Q)iasl -tc -p $@ $(OUT)acpi-dsdt.dsl.i - $(Q)rm $(OUT)acpi-dsdt.dsl.i + $(Q)iasl -tc -p $@ $< || (e=$$?; rm $@; exit $$e) + +src/acpi.c: src/acpi-dsdt.hex +$(OUT)ccode32flat.o: src/acpi.c +$(OUT)../src/acpi-dsdt.hex: src/acpi-dsdt.hex ####### Generic rules clean: -- 1.6.6.1

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SMBIOS strings
by Jes Sorensen 02 Jun '10

02 Jun '10

Hi, We were looking at the dmidecode output from qemu-kvm pre-seabios and current qemu-kvm and noticed some of the strings have changed. The main problem with this is that certain OSes are quite sensitive to system changes and avoiding to change things unnecessarily would probably be a good thing. I wanted to check with the lists if there are any strong feelings about this, and whether some of these changes were made for specific reasons? For example: Handle 0x0000, DMI type 0, 24 bytes BIOS Information - Vendor: QEMU - Version: QEMU + Vendor: Bochs + Version: Bochs Release Date: 01/01/2007 Address: 0xE8000 Runtime Size: 96 kB and this: Handle 0x0401, DMI type 4, 32 bytes Processor Information - Socket Designation: CPU 1 + Socket Designation: CPU01 Type: Central Processor Family: Other - Manufacturer: QEMU - ID: 63 06 00 00 FD FB 8B 07 + Manufacturer: Bochs + ID: 23 06 00 00 FD FB 8B 07 Version: Not Specified Voltage: Unknown External Clock: Unknown I guess the Socket Designation in particular might have been done for a reason? Otherwise, if there are no objections, I'll look at adding some patches to make it more backwards compatible. Cheers, Jes

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[PATCH] virtio: clean up memory barrier usage
by Michael S. Tsirkin 27 May '10

27 May '10

cleanup memory barrier usage bringing it in sync with what linux guest does. The rules are simple: - read barrier after index read - write barrier before index write Also, call macros smp_rmb/smp_wmb to stress we are not syncing with a real io device here. While I don't think compiler is crazy/powerful enough to reorder these, anyway, the bogus barriers we currently have in code will confuse anyone who tries to copy/reuse it. Signed-off-by: Michael S. Tsirkin <mst(a)redhat.com> Cc: Gleb Natapov <gleb(a)redhat.com> --- This depends on the NO_NOTIFY patch I sent earlier. Note: compile-tested only Gleb, could you try it out pls? src/virtio-ring.c | 13 ++++++------- src/virtio-ring.h | 5 +++-- 2 files changed, 9 insertions(+), 9 deletions(-) diff --git a/src/virtio-ring.c b/src/virtio-ring.c index 493d8b5..97a3ffe 100644 --- a/src/virtio-ring.c +++ b/src/virtio-ring.c @@ -38,8 +38,10 @@ int vring_more_used(struct vring_virtqueue *vq) { struct vring_used *used = GET_FLATPTR(vq->vring.used); - wmb(); - return GET_FLATPTR(vq->last_used_idx) != GET_FLATPTR(used->idx); + int more = GET_FLATPTR(vq->last_used_idx) != GET_FLATPTR(used->idx); + /* Make sure ring reads are done after idx read above. */ + smp_rmb(); + return more; } /* @@ -63,7 +65,6 @@ void vring_detach(struct vring_virtqueue *vq, unsigned int head) /* link it with free list and point to it */ SET_FLATPTR(desc[i].next, GET_FLATPTR(vq->free_head)); - wmb(); SET_FLATPTR(vq->free_head, head); } @@ -85,7 +86,6 @@ int vring_get_buf(struct vring_virtqueue *vq, unsigned int *len) // BUG_ON(!vring_more_used(vq)); elem = &used->ring[GET_FLATPTR(vq->last_used_idx) % GET_FLATPTR(vr->num)]; - wmb(); id = GET_FLATPTR(elem->id); if (len != NULL) *len = GET_FLATPTR(elem->len); @@ -136,7 +136,6 @@ void vring_add_buf(struct vring_virtqueue *vq, av = (GET_FLATPTR(avail->idx) + num_added) % GET_FLATPTR(vr->num); SET_FLATPTR(avail->ring[av], head); - wmb(); } void vring_kick(unsigned int ioaddr, struct vring_virtqueue *vq, int num_added) @@ -144,9 +143,9 @@ void vring_kick(unsigned int ioaddr, struct vring_virtqueue *vq, int num_added) struct vring *vr = &vq->vring; struct vring_avail *avail = GET_FLATPTR(vr->avail); - wmb(); + /* Make sure idx update is done after ring write. */ + smp_wmb(); SET_FLATPTR(avail->idx, GET_FLATPTR(avail->idx) + num_added); - mb(); vp_notify(ioaddr, GET_FLATPTR(vq->queue_index)); } diff --git a/src/virtio-ring.h b/src/virtio-ring.h index 3fb86fe..8b546f4 100644 --- a/src/virtio-ring.h +++ b/src/virtio-ring.h @@ -9,8 +9,9 @@ #define virt_to_phys(v) (unsigned long)(v) #define phys_to_virt(p) (void*)(p) -#define wmb() barrier() -#define mb() barrier() +/* Compiler barrier is enough as an x86 CPU does not reorder reads or writes */ +#define smp_rmb() barrier() +#define smp_wmb() barrier() /* Status byte for guest to report progress, and synchronize features. */ /* We have seen device and processed generic fields (VIRTIO_CONFIG_F_VIRTIO) */ -- 1.7.1.12.g42b7f

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Re: [SeaBIOS] [PATCH] KVM vcpu hotplug seabios infrastructure
by Gleb Natapov 24 May '10

24 May '10

On Tue, May 18, 2010 at 05:08:29PM +0800, Liu, Jinsong wrote: > Hi, Kevin, Gleb, Avi, and Yunhong > > I have updated vcpu hotplug seabios infrastructure, as attached. Please kindly review it, thanks! > Applied it to upstream Seabios, but can't compile: src/acpi.c:274:28: error: acpi-ssdt-15.hex: No such file or directory src/acpi.c:275:32: error: acpi-ssdt-anycpu.hex: No such file or directory src/acpi.c: In function 'build_fadt': src/acpi.c:307: error: 'acpi_dsdt' undeclared (first use in this function) src/acpi.c:307: error: (Each undeclared identifier is reported only once src/acpi.c:307: error: for each function it appears in.) src/acpi.c: In function 'build_ssdt': src/acpi.c:435: error: 'acpi_ssdt_anycpu' undeclared (first use in this function) src/acpi.c:436: error: 'acpi_ssdt_15' undeclared (first use in this function) make: *** [out/ccode32flat.o] Error 1 -- Gleb.

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[PATCH 0/4] Don't use RTC to time boot menu delay.
by Kevin O'Connor 23 May '10

23 May '10

Some real machine can apparently have a flaky real-time-clock. So, don't use it for timing the boot menu - the regular timer irq is fine for this purpose. Kevin O'Connor (4): Allow wait_irq to be called in 32bit code. Rename check_time() to check_tsc(). Generalize timer based delay code. Don't use RTC to time boot menu delay. Makefile | 2 +- src/ata.c | 8 +++--- src/boot.c | 2 +- src/cdrom.c | 2 +- src/clock.c | 36 +++++++++++++++++++++--- src/ps2port.c | 2 +- src/serial.c | 37 ++++--------------------- src/stacks.c | 83 +++++++++++++++++++++++++++++++++++++++++++++++++------- src/usb-ehci.c | 10 +++--- src/usb-hub.c | 4 +- src/usb-ohci.c | 8 +++--- src/usb-uhci.c | 6 ++-- src/util.c | 54 ++---------------------------------- src/util.h | 20 +++++-------- 14 files changed, 144 insertions(+), 130 deletions(-)

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[PATCH 0/4] Misc cleanups
by Kevin O'Connor 23 May '10

23 May '10

Kevin O'Connor (4): Make sure virtio-blk is fully compiled out if not wanted. Minor ata cleanups. Minor - compile out usb-msc code if CONFIG_USB_MSC not set. Improve optionrom debugging statements. src/ata.c | 14 ++++++++++---- src/optionroms.c | 12 +++++++----- src/pci.h | 10 ++++++++++ src/usb-msc.c | 2 ++ src/virtio-blk.c | 4 +++- 5 files changed, 32 insertions(+), 10 deletions(-)

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[PATCH] virtio: remove NO_NOTIFY optimization
by Michael S. Tsirkin 20 May '10

20 May '10

NO_NOTIFY is an optimization to reduce the number of exits, but using it requires careful synchronization with host, forcing read/write ordering for the CPU. Otherwise we risk not kicking a host when it is waiting for more buffers, resulting in a deadlock. Let's just always kick, it's way simpler. Signed-off-by: Michael S. Tsirkin <mst(a)redhat.com> Cc: Gleb Natapov <gleb(a)redhat.com> --- The following is compile-tested only. Gleb, could you try it out please? src/virtio-ring.c | 4 +--- 1 files changed, 1 insertions(+), 3 deletions(-) diff --git a/src/virtio-ring.c b/src/virtio-ring.c index 7565688..493d8b5 100644 --- a/src/virtio-ring.c +++ b/src/virtio-ring.c @@ -143,12 +143,10 @@ void vring_kick(unsigned int ioaddr, struct vring_virtqueue *vq, int num_added) { struct vring *vr = &vq->vring; struct vring_avail *avail = GET_FLATPTR(vr->avail); - struct vring_used *used = GET_FLATPTR(vq->vring.used); wmb(); SET_FLATPTR(avail->idx, GET_FLATPTR(avail->idx) + num_added); mb(); - if (!(GET_FLATPTR(used->flags) & VRING_USED_F_NO_NOTIFY)) - vp_notify(ioaddr, GET_FLATPTR(vq->queue_index)); + vp_notify(ioaddr, GET_FLATPTR(vq->queue_index)); } -- 1.7.1.12.g42b7f

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[PATCHv2] fix two issues with virtio-blk
by Gleb Natapov 19 May '10

19 May '10

1. Check if blk_size is valid in virtio_blk config. 2. Disable interrupt otherwise interrupt may stuck with some guests. Signed-off-by: Gleb Natapov <gleb(a)redhat.com> ChangeLog: v1->v2: - Treat sector size not equal to 512 bytes as error. diff --git a/src/virtio-blk.c b/src/virtio-blk.c index 7cc2edb..e6167e9 100644 --- a/src/virtio-blk.c +++ b/src/virtio-blk.c @@ -127,23 +127,34 @@ virtio_blk_setup(void) VIRTIO_CONFIG_S_DRIVER ); if (vp_find_vq(ioaddr, 0, vdrive_g->vq) < 0 ) { + dprintf(1, "fail to find vq for virtio-blk %x:%x\n", + pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf)); + next: free(vdrive_g); free(desc); free(vq); - dprintf(1, "fail to find vq for virtio-blk %x:%x\n", - pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf)); continue; } struct virtio_blk_config cfg; vp_get(ioaddr, 0, &cfg, sizeof(cfg)); - vdrive_g->drive.blksize = cfg.blk_size; + u32 f = vp_get_features(ioaddr); + vdrive_g->drive.blksize = (f & (1 << VIRTIO_BLK_F_BLK_SIZE)) ? + cfg.blk_size : DISK_SECTOR_SIZE; + vdrive_g->drive.sectors = cfg.capacity; dprintf(3, "virtio-blk %x:%x blksize=%d sectors=%u\n", pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), vdrive_g->drive.blksize, (u32)vdrive_g->drive.sectors); + if (vdrive_g->drive.blksize != DISK_SECTOR_SIZE) { + dprintf(1, "virtio-blk %x:%x block size %d is unsupported\n", + pci_bdf_to_bus(bdf), pci_bdf_to_dev(bdf), + vdrive_g->drive.blksize); + goto next; + } + vdrive_g->drive.pchs.cylinders = cfg.cylinders; vdrive_g->drive.pchs.heads = cfg.heads; vdrive_g->drive.pchs.spt = cfg.sectors; diff --git a/src/virtio-blk.h b/src/virtio-blk.h index 8095d5b..7243704 100644 --- a/src/virtio-blk.h +++ b/src/virtio-blk.h @@ -16,6 +16,8 @@ struct virtio_blk_config u32 opt_io_size; } __attribute__((packed)); +#define VIRTIO_BLK_F_BLK_SIZE 6 + /* These two define direction. */ #define VIRTIO_BLK_T_IN 0 #define VIRTIO_BLK_T_OUT 1 diff --git a/src/virtio-ring.h b/src/virtio-ring.h index 3fb86fe..014defc 100644 --- a/src/virtio-ring.h +++ b/src/virtio-ring.h @@ -105,6 +105,8 @@ static inline void vring_init(struct vring *vr, vr->desc = phys_to_virt(pa); vr->avail = (struct vring_avail *)&vr->desc[num]; + /* disable interrupts */ + vr->avail->flags |= VRING_AVAIL_F_NO_INTERRUPT; /* physical address of used must be page aligned */ -- Gleb.

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[PATCH] KVM vcpu hotplug seabios infrastructure
by Liu, Jinsong 18 May '10

18 May '10

Hi, Kevin, Gleb, Avi, and Yunhong I have updated vcpu hotplug seabios infrastructure, as attached. Please kindly review it, thanks! -------------------------------------------- This patch is to support KVM vcpu hotplug feature. It ported from KVM bochs bios, and update some points to KVM seabios: 1. build ssdt with 15/255 processor obj, which separately support Win2000 and other oses; 2. build madt accordingly, protect it as 'E820_NVS', and keep madt checksum and lapic flag correctly when cpu hotplug; 3. define Processor under \_SB instead of \_PR, so that it works better with latest linux like 2.6.32 later; 4. for Processor _MAT method, explicitly transfer it 'ToBuffer' so that os will not confused with 'Integer' which will result in parse failure; 5. for Processor _STA method, use 0x0 instead of 0x9 for cpu hot-remove, which matchs better with ACPI 4.0 spec, and works better with latest linux; 6. add Processor _EJ0 method, so that 'eject' appear under linux /sys, and triggered by uevent to make cpu hot-remove; ------------------------------------------- Thanks, Jinsong

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SeaBIOS May 2010