| From | Thomas Gleixner <> | Subject | Re: [PATCHv6 28/30] x86/tdx: ioapic: Add shared bit for IOAPIC base address | Date | Thu, 17 Mar 2022 16:00:07 +0100 |
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On Wed, Mar 16 2022 at 05:08, Kirill A. Shutemov wrote: > Introduce a special fixmap helper just for the IOAPIC code. Ensure > that it marks IOAPIC pages as "shared". This replaces > set_fixmap_nocache() with __set_fixmap() since __set_fixmap() > allows custom 'prot' values. > > AMD SEV gets IOAPIC pages shared because FIXMAP_PAGE_NOCACHE has _ENC > bit clear. TDX has to set bit to share the page with the host. > > Signed-off-by: Isaku Yamahata <isaku.yamahata@intel.com> > Reviewed-by: Andi Kleen <ak@linux.intel.com> > Reviewed-by: Tony Luck <tony.luck@intel.com> > Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com> > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
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