Date: Tue, 06 May 2008 21:08:10 +0200 From: Teufel <bsd@kuehlbox.de> To: freebsd-emulation@FreeBSD.org Subject: Re: seems I finally found what upset kqemu on amd64 SMP... shared gdt! (please test patch :) Message-ID: <4820AC9A.1070803@kuehlbox.de> In-Reply-To: <20080501101951.GA30274@saturn.kn-bremen.de> References: <20080429222458.GA20855@saturn.kn-bremen.de> <20080501101951.GA30274@saturn.kn-bremen.de>
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Juergen Lock wrote:
> The patch applied with offsets (I still had debug code in when I made it),
> here is a rebased version:
>
> Index: kqemu-freebsd.c
> @@ -33,6 +33,11 @@
>
> #include <machine/vmparam.h>
> #include <machine/stdarg.h>
> +#ifdef __x86_64__
> +#include <sys/pcpu.h>
> +#include <machine/segments.h>
> +#include <machine/tss.h>
> +#endif
>
> #include "kqemu-kernel.h"
>
> @@ -234,6 +239,19 @@
> va_end(ap);
> }
>
> +#ifdef __x86_64__
> +/* called with interrupts disabled */
> +void CDECL kqemu_tss_workaround(void)
> +{
> + int gsel_tss = GSEL(GPROC0_SEL, SEL_KPL);
> +
> + gdt_segs[GPROC0_SEL].ssd_base = (long) &common_tss[PCPU_GET(cpuid)];
> + ssdtosyssd(&gdt_segs[GPROC0_SEL],
> + (struct system_segment_descriptor *)&gdt[GPROC0_SEL]);
> + ltr(gsel_tss);
> +}
> +#endif
> +
> struct kqemu_instance {
> #if __FreeBSD_version >= 500000
> TAILQ_ENTRY(kqemu_instance) kqemu_ent;
> Index: common/kernel.c
> @@ -1025,6 +1025,9 @@
> #ifdef __x86_64__
> uint16_t saved_ds, saved_es;
> unsigned long fs_base, gs_base;
> +#ifdef __FreeBSD__
> + struct kqemu_global_state *g = s->global_state;
> +#endif
> #endif
>
> #ifdef PROFILE
> @@ -1188,6 +1191,13 @@
> apic_restore_nmi(s, apic_nmi_mask);
> }
> profile_record(s);
> +#ifdef __FreeBSD__
> +#ifdef __x86_64__
> + spin_lock(&g->lock);
> + kqemu_tss_workaround();
> + spin_unlock(&g->lock);
> +#endif
> +#endif
>
> if (s->mon_req == MON_REQ_IRQ) {
> struct kqemu_exception_regs *r;
> Index: kqemu-kernel.h
> @@ -44,4 +44,10 @@
>
> void CDECL kqemu_log(const char *fmt, ...);
>
> +#ifdef __FreeBSD__
> +#ifdef __x86_64__
> +void CDECL kqemu_tss_workaround(void);
> +#endif
> +#endif
> +
> #endif /* KQEMU_KERNEL_H */
>
applied the patch and kqemu works now with quad core CPU running
7-stable amd64 smp. However, running a win2k3 guest results in many
"fpudna in kernel mode!" kernel messages, regardless if -kernel-mode is
used or not (but with kqemu-user enabled).
What needs to be done to fix that?
Greetings,
Xat
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