SeaBIOS August 2016

seabios@seabios.org

14 participants
25 discussions

[PATCH 0/6] Misc tpm updates
by Kevin O'Connor 02 Dec '16

02 Dec '16

Hi Stefan, I dusted off some TPM patches I had worked on earlier in the year. Mostly just code movement, but the last patch I think helps simplify tpm_build_and_send_cmd(). Do they look okay to you? -Kevin Kevin O'Connor (6): tpm: Add comment banners to tcg.c separating major parts of spec tpm: Don't call tpm_set_failure() from tpm12_get_capability() tpm: Move code around in tcgbios.c to keep like code together acpi: Generalize find_fadt() and find_tcpa_by_rsdp() into find_acpi_table() tpm: Don't call tpm_build_and_send_cmd() from tpm20_stirrandom() tpm: Rework tpm_build_and_send_cmd() into tpm_simple_cmd() src/fw/biostables.c | 18 +- src/std/acpi.h | 7 - src/std/tcg.h | 199 +++++++++-------- src/tcgbios.c | 611 ++++++++++++++++++++++------------------------------ src/util.h | 1 + 5 files changed, 369 insertions(+), 467 deletions(-) -- 2.5.5

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[PATCH 0/5] serial console support
by Gerd Hoffmann 13 Oct '16

13 Oct '16

Hi, Next round of serial console patches, Still not ready to merge. Headline feature of this version is split mode (i.e. output on both vga and serial). Have a initial working implementation now, logic is simliar to the vgabios timer hook (as suggested by Kevin). Also changed the output logic, down to a one-cell buffer (char+attr) for output. Cursor updates are simply written to BDA now, with the actual move being done lazily when printing the next character or checking for keyboard input. That is especially useful for splitmode as we can simply skip the cursor position updates and let the vgabios do them instead. TODO list: * compile time (CONFIG_*) option. * input handling cleanups. * implement missing int10h functions. * more testing. cheers, Gerd Gerd Hoffmann (5): std: add cp437 to unicode map kbd: make enqueue_key public, add ascii_to_keycode paravirt: read QEMU_CFG_NOGRAPHIC, store in etc/sercon-enable romfile add serial console support [wip] sercon: initial split-output implementation Makefile | 7 +- src/clock.c | 1 + src/fw/paravirt.c | 2 + src/kbd.c | 17 +- src/misc.c | 2 + src/optionroms.c | 9 +- src/romlayout.S | 39 ++++ src/sercon.c | 621 ++++++++++++++++++++++++++++++++++++++++++++++++++++++ src/std/cp437.c | 275 ++++++++++++++++++++++++ src/std/cp437.h | 1 + src/util.h | 5 + 11 files changed, 974 insertions(+), 5 deletions(-) create mode 100644 src/sercon.c create mode 100644 src/std/cp437.c create mode 100644 src/std/cp437.h -- 1.8.3.1

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[PATCH] pic: The default hardware interrupt handlers should not take a parameter
by Kevin O'Connor 30 Aug '16

30 Aug '16

Hardware interrupt handlers don't take a parameter. Remove the incorrect (and unused) parameter from handle_hwpic1/2(). Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> --- src/hw/pic.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/src/hw/pic.c b/src/hw/pic.c index d8b9764..a13564a 100644 --- a/src/hw/pic.c +++ b/src/hw/pic.c @@ -101,14 +101,14 @@ pic_isr2_read(void) // Handler for otherwise unused hardware irqs. void VISIBLE16 -handle_hwpic1(struct bregs *regs) +handle_hwpic1(void) { dprintf(DEBUG_ISR_hwpic1, "handle_hwpic1 irq=%x\n", pic_isr1_read()); pic_eoi1(); } void VISIBLE16 -handle_hwpic2(struct bregs *regs) +handle_hwpic2(void) { dprintf(DEBUG_ISR_hwpic2, "handle_hwpic2 irq=%x\n", pic_isr2_read()); pic_eoi2(); -- 2.5.5

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hw/usb-msc.c: Branch condition evaluates to a garbage value
by Paul Menzel 30 Aug '16

30 Aug '16

Dear SeaBIOS developers, Building the attached configuration with GCC 5.3.0 and the static analyzer scan-build shipped with Clang 3.8, the following error is reported in `src/hw/usb-msc.c` in line 110. The static analyzer seems to think that the struct member is not initialized. But I guess it’s done in the line below, and therefore a false positive? ``` ret = usb_msc_send(udrive_gf, USB_DIR_IN , MAKE_FLATPTR(GET_SEG(SS), &csw), sizeof(csw)); ``` Thanks, Paul

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alt-sysrq support
by Albert Cahalan 25 Aug '16

25 Aug '16

This is a patch that worked for the Bochs BIOS. The code is similar. The important part is the keycode. DOSRMX needs this for console switching. The other part is a hook. I have key presses; key releases should be done too. I don't know what uses this, but it is a standard BIOS feature.

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Show bootsplash already during device detection?
by Paul Menzel 24 Aug '16

24 Aug '16

Dear SeaBIOS folks, Playing with the bootsplash feature, I noticed, that it’s only displayed when the boot menu is displayed, when no bootsplash is used. On the ASRock E350M1 it takes ten seconds to detect the connected spinning hard disk, and the bootsplash is not displayed during that time. Would it make sense to already show the bootsplash then? Thanks, Paul

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[PATCH] ps2: Remove stale check for timeout warning on reset
by Kevin O'Connor 21 Aug '16

21 Aug '16

Commit 4ce5d207 removed the code to wait for a possible second byte from a keyboard reset command, but it did not remove the extra check when warning in ps2_recvbyte(). Remove the now stale code in ps2_recvbyte(). Signed-off-by: Kevin O'Connor <kevin(a)koconnor.net> --- src/hw/ps2port.c | 4 +--- 1 file changed, 1 insertion(+), 3 deletions(-) diff --git a/src/hw/ps2port.c b/src/hw/ps2port.c index d5504f7..d9727d2 100644 --- a/src/hw/ps2port.c +++ b/src/hw/ps2port.c @@ -179,9 +179,7 @@ ps2_recvbyte(int aux, int needack, int timeout) } if (timer_check(end)) { - // Don't warn on second byte of a reset - if (timeout > 100) - warn_timeout(); + warn_timeout(); return -1; } yield(); -- 2.5.5

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Re: [SeaBIOS] [QUESTION]stuck in SeaBIOS and vm cannot be reset any more
by Xulei (Stone) 12 Aug '16

12 Aug '16

> On 11/08/2016 04:13, Xulei (Stone) wrote: > > Following your suggestion, I found this problem may be caused by the > > flag of HF_SMM_MASK. I'm now sure QEMU is sending the KVM_SMI ioctl, > > and kmod already handles this ioctl. > > > > I add printk in inject_pending_event(), like this: > > > > /* try to inject new event if pending */ > > + if(get_smi) > > + printk(KERN_INFO "is_smm:%d\n", is_smm(vcpu)); > > + > > if (vcpu->arch.smi_pending && !is_smm(vcpu)) { > > vcpu->arch.smi_pending = false; > > process_smi(vcpu); > > } > > > > Then I found that the normal output is (is_smm is 0): > > 2016-08-11T09:44:45.090078+08:00|info|kernel[-]|[1269634.151054get smi > > ioctl from qemu > > 2016-08-11T09:44:45.090097+08:00|info|kernel[-]|[1269634.151056in > > process_smi_request > > 2016-08-11T09:44:45.090114+08:00|info|kernel[-]|[1269634.151057is_smm: > > 0 > > 2016-08-11T09:44:45.090131+08:00|info|kernel[-]|[1269634.151058process > > smi 2016-08-11T09:44:45.090914+08:00|info|kernel[-]|[1269634.151575get > > smi ioctl from qemu > > 2016-08-11T09:44:45.090947+08:00|info|kernel[-]|[1269634.151578in > > process_smi_request > > 2016-08-11T09:44:45.090972+08:00|info|kernel[-]|[1269634.151579is_smm: > > 0 > > > > When problem occurs the output is (is_smm is 1): > > 2016-08-11T10:07:11.755982+08:00|info|kernel[-]|[1270981.916056get smi > > ioctl from qemu > > 2016-08-11T10:07:11.756035+08:00|info|kernel[-]|[1270981.916062in > > process_smi_request > > 2016-08-11T10:07:11.756078+08:00|info|kernel[-]|[1270981.916064is_smm: > > 1 2016-08-11T10:07:13.896977+08:00|info|kernel[-]|[1270984.058117get > > smi ioctl from qemu > > 2016-08-11T10:07:13.897063+08:00|info|kernel[-]|[1270984.058121in > > process_smi_request > > 2016-08-11T10:07:13.897091+08:00|info|kernel[-]|[1270984.058123is_smm: > > 1 > > > > So, it seems kvm cannot set HF_SMM_MASK flag correctly when we > continuously reset VM. > > Any futher suggestion? Paolo :) > > I guess a KVM_SET_VCPU_EVENTS is missing at reset time. This maybe a kvm bug of SMM supporting feature: assuming kvm SMI injection process is interrupted at the point between process_smi() and bios executing RSM. Then bios runs from the beginning again because of resetting and kvm keeps is_smm() =1. When bios writes 0xb2 to raise a SMI, kvm thinks is_smm() = 1, and will not process this request, and also will not call kvm_vcpu_reset() to clear HF_SMM_MASK flag any more. Bios will not executing RSM because of it does not get this SMI injecting from kvm. This condition cannot break until we destroy this VM. After testing 2 days, following patch can solve this problem, but obviously it is not a suitable solution: static int kvm_vcpu_ioctl_smi(struct kvm_vcpu *vcpu) { + if (is_smm(vcpu)) { + vcpu->arch.hflags &= ~HF_SMM_MASK; + vcpu->arch.smi_pending = 0; + } kvm_make_request(KVM_REQ_SMI, vcpu); return 0; } Paolo, could you post a suitable patch to solve this problem based on the information I mentioned above? > Paolo

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[PATCH v3 0/7] tpm: Extend PCRs in all available PCR banks
by Stefan Berger 11 Aug '16

11 Aug '16

This series of patches extends the TPM2 code to extend the BIOS related PCRs 0-7 in all available banks. This prevents that these PCRs remain untouched and filled with bogus values by applications. For example, the SHA1 hash is extended into the SHA256 bank. The value that is extended into this bank is essentially a SHA1 with zero bytes used for filling it to the size of a sha256 hash. This is done for all PCR banks of the TPM2 where these PCRs are available. v2->v3: - Following Kevin's comments; would defer split-up of code in tcgbios.c to a later time v1->v2: - extended the log functions for logging the additional hashes. This added more patches to this series Regards, Stefan Stefan Berger (7): tpm: Retrieve the PCR Bank configuration tpm: Restructure tpm20_extend to use buffer and take hash as parameter tpm: Refactor tpml_digest_values_sha1 structure tpm: Extend tpm20_extend to support extending to multiple PCR banks tpm: Move tpm_log_init to a later point tpm: Adjust the TPM2 log header to show all hashes tpm: Append to TPM2 log the hashes used for PCR extension src/std/tcg.h | 86 +++++++++++-- src/tcgbios.c | 404 ++++++++++++++++++++++++++++++++++++++++++++++++++-------- 2 files changed, 421 insertions(+), 69 deletions(-) -- 2.5.5

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Re: [SeaBIOS] [QUESTION]stuck in SeaBIOS and vm cannot be reset any more
by Paolo Bonzini 11 Aug '16

11 Aug '16

On 11/08/2016 04:13, Xulei (Stone) wrote: > Following your suggestion, I found this problem may be caused by the flag of > HF_SMM_MASK. I'm now sure QEMU is sending the KVM_SMI ioctl, and > kmod already handles this ioctl. > > I add printk in inject_pending_event(), like this: > > /* try to inject new event if pending */ > + if(get_smi) > + printk(KERN_INFO "is_smm:%d\n", is_smm(vcpu)); > + > if (vcpu->arch.smi_pending && !is_smm(vcpu)) { > vcpu->arch.smi_pending = false; > process_smi(vcpu); > } > > Then I found that the normal output is (is_smm is 0): > 2016-08-11T09:44:45.090078+08:00|info|kernel[-]|[1269634.151054get smi ioctl from qemu > 2016-08-11T09:44:45.090097+08:00|info|kernel[-]|[1269634.151056in process_smi_request > 2016-08-11T09:44:45.090114+08:00|info|kernel[-]|[1269634.151057is_smm:0 > 2016-08-11T09:44:45.090131+08:00|info|kernel[-]|[1269634.151058process smi > 2016-08-11T09:44:45.090914+08:00|info|kernel[-]|[1269634.151575get smi ioctl from qemu > 2016-08-11T09:44:45.090947+08:00|info|kernel[-]|[1269634.151578in process_smi_request > 2016-08-11T09:44:45.090972+08:00|info|kernel[-]|[1269634.151579is_smm:0 > > When problem occurs the output is (is_smm is 1): > 2016-08-11T10:07:11.755982+08:00|info|kernel[-]|[1270981.916056get smi ioctl from qemu > 2016-08-11T10:07:11.756035+08:00|info|kernel[-]|[1270981.916062in process_smi_request > 2016-08-11T10:07:11.756078+08:00|info|kernel[-]|[1270981.916064is_smm:1 > 2016-08-11T10:07:13.896977+08:00|info|kernel[-]|[1270984.058117get smi ioctl from qemu > 2016-08-11T10:07:13.897063+08:00|info|kernel[-]|[1270984.058121in process_smi_request > 2016-08-11T10:07:13.897091+08:00|info|kernel[-]|[1270984.058123is_smm:1 > > So, it seems kvm cannot set HF_SMM_MASK flag correctly when we continuously reset VM. > Any futher suggestion? Paolo :) I guess a KVM_SET_VCPU_EVENTS is missing at reset time. Paolo

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SeaBIOS August 2016