On 18/02/15 09:03, Jan Beulich wrote:
> In order for commit cbeeaa7d ("x86/nmi: fix shootdown of pcpus
> running in VMX non-root mode")'s re-use of that fixmap entry to not
> cause undesirable (in crash context) cross-CPU TLB flushes, invalidate
> the fixmap entry right after use.
>
> Signed-off-by: Jan Beulich <jbeul...@suse.com>Reviewed-by: Andrew Cooper <andrew.coop...@citrix.com> > > --- a/xen/arch/x86/tboot.c > +++ b/xen/arch/x86/tboot.c > @@ -138,6 +138,7 @@ void __init tboot_probe(void) > TXT_PUB_CONFIG_REGS_BASE + TXTCR_SINIT_BASE); > tboot_copy_memory((unsigned char *)&sinit_size, sizeof(sinit_size), > TXT_PUB_CONFIG_REGS_BASE + TXTCR_SINIT_SIZE); > + __set_fixmap(FIX_TBOOT_MAP_ADDRESS, 0, 0); > } > > /* definitions from xen/drivers/passthrough/vtd/iommu.h > @@ -476,6 +477,8 @@ int __init tboot_parse_dmar_table(acpi_t > dmar_table_raw = xmalloc_array(unsigned char, dmar_table_length); > tboot_copy_memory(dmar_table_raw, dmar_table_length, pa); > dmar_table = (struct acpi_table_header *)dmar_table_raw; > + __set_fixmap(FIX_TBOOT_MAP_ADDRESS, 0, 0); > + > rc = dmar_handler(dmar_table); > xfree(dmar_table_raw); > > > > _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
