* qemu panic on OSX 10.15.6
@ 2020-09-01 12:45 David Cohen
2020-09-02 8:17 ` Christian Schoenebeck
0 siblings, 1 reply; 3+ messages in thread
From: David Cohen @ 2020-09-01 12:45 UTC (permalink / raw)
To: qemu-devel
Hi,
I'm trying to use qemu on OSX Catalina using HVF hypervisor, but it's
currently panic'ing upon booting Linux guest.
These are the args I'm using:
build % ./qemu-system-x86_64 -cdrom
~/Downloads/archlinux-2020.08.01-x86_64.iso -smp 4 -m 4G -vga virtio
-accel hvf -cpu host
I could trace the failure to test_pt_entry(), in this exact position:
build % git diff
diff --git a/target/i386/hvf/x86_mmu.c b/target/i386/hvf/x86_mmu.c
index 65d4603dbf..8f04a94cc6 100644
--- a/target/i386/hvf/x86_mmu.c
+++ b/target/i386/hvf/x86_mmu.c
@@ -113,6 +113,7 @@ static bool test_pt_entry(struct CPUState *cpu,
struct gpt_translation *pt,
}
if (!pte_present(pte)) {
+ printf("Code is failing here");
return false;
}
Is anyone aware of this issue?
Br, David Cohen
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: qemu panic on OSX 10.15.6
2020-09-01 12:45 qemu panic on OSX 10.15.6 David Cohen
@ 2020-09-02 8:17 ` Christian Schoenebeck
2020-09-03 14:50 ` Roman Bolshakov
0 siblings, 1 reply; 3+ messages in thread
From: Christian Schoenebeck @ 2020-09-02 8:17 UTC (permalink / raw)
To: qemu-devel; +Cc: David Cohen, Cameron Esfahani, Roman Bolshakov
On Dienstag, 1. September 2020 14:45:55 CEST David Cohen wrote:
> Hi,
>
> I'm trying to use qemu on OSX Catalina using HVF hypervisor, but it's
> currently panic'ing upon booting Linux guest.
>
> These are the args I'm using:
> build % ./qemu-system-x86_64 -cdrom
> ~/Downloads/archlinux-2020.08.01-x86_64.iso -smp 4 -m 4G -vga virtio
> -accel hvf -cpu host
>
> I could trace the failure to test_pt_entry(), in this exact position:
>
> build % git diff
> diff --git a/target/i386/hvf/x86_mmu.c b/target/i386/hvf/x86_mmu.c
> index 65d4603dbf..8f04a94cc6 100644
> --- a/target/i386/hvf/x86_mmu.c
> +++ b/target/i386/hvf/x86_mmu.c
> @@ -113,6 +113,7 @@ static bool test_pt_entry(struct CPUState *cpu,
> struct gpt_translation *pt,
> }
>
> if (!pte_present(pte)) {
> + printf("Code is failing here");
> return false;
> }
>
>
> Is anyone aware of this issue?
>
> Br, David Cohen
CCing Cameron and Roman, just in case.
Best regards,
Christian Schoenebeck
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: qemu panic on OSX 10.15.6
2020-09-02 8:17 ` Christian Schoenebeck
@ 2020-09-03 14:50 ` Roman Bolshakov
0 siblings, 0 replies; 3+ messages in thread
From: Roman Bolshakov @ 2020-09-03 14:50 UTC (permalink / raw)
To: Christian Schoenebeck; +Cc: David Cohen, qemu-devel, Cameron Esfahani
On Wed, Sep 02, 2020 at 10:17:01AM +0200, Christian Schoenebeck wrote:
> On Dienstag, 1. September 2020 14:45:55 CEST David Cohen wrote:
> > Hi,
> >
> > I'm trying to use qemu on OSX Catalina using HVF hypervisor, but it's
> > currently panic'ing upon booting Linux guest.
> >
> > These are the args I'm using:
> > build % ./qemu-system-x86_64 -cdrom
> > ~/Downloads/archlinux-2020.08.01-x86_64.iso -smp 4 -m 4G -vga virtio
> > -accel hvf -cpu host
> >
> > I could trace the failure to test_pt_entry(), in this exact position:
> >
> > build % git diff
> > diff --git a/target/i386/hvf/x86_mmu.c b/target/i386/hvf/x86_mmu.c
> > index 65d4603dbf..8f04a94cc6 100644
> > --- a/target/i386/hvf/x86_mmu.c
> > +++ b/target/i386/hvf/x86_mmu.c
> > @@ -113,6 +113,7 @@ static bool test_pt_entry(struct CPUState *cpu,
> > struct gpt_translation *pt,
> > }
> >
> > if (!pte_present(pte)) {
> > + printf("Code is failing here");
> > return false;
> > }
> >
> >
> > Is anyone aware of this issue?
> >
> > Br, David Cohen
>
> CCing Cameron and Roman, just in case.
>
Hi Christian, David,
Are we talking about the issue?
$ $QEMU -cdrom ~/Downloads/archlinux-2020.08.01-x86_64.iso -smp 4 -m 4G -vga virtio -accel hvf -cpu host
vmx_write_mem: mmu_gva_to_gpa ffff8ecf3b150000 failed
[1] 24888 abort $QEMU -cdrom ~/Downloads/archlinux-2020.08.01-x86_64.iso -smp 4 -m 4G -vga
It might be a dup of:
https://bugs.launchpad.net/qemu/+bug/1838390
The likely cause of the issue is HVF doesn't generate #PF to the guest
when it emulates an instruction and finds a page that's not in memory,
instead it just aborts. setjmp()/longjmp() in hvf_vcpu_exec() might be
used to raise the CPU exception similar to TCG, that would fix the
ticket.
But I'm also seeing a kernel panic in the guest on TSC read in the
guest. It doesn't happen if -cpu host is not used.
Thanks,
Roman
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2020-09-03 14:52 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2020-09-01 12:45 qemu panic on OSX 10.15.6 David Cohen
2020-09-02 8:17 ` Christian Schoenebeck
2020-09-03 14:50 ` Roman Bolshakov
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