On Tue, Jan 23, 2024 at 12:54 AM <isaku.yamahata@xxxxxxxxx> wrote: > > From: Kai Huang <kai.huang@xxxxxxxxx> > > KVM will need to make SEAMCALLs to create and run TDX guests. Export > SEAMCALL functions for KVM to use. > > Also add declaration of SEAMCALL functions to <asm/asm-prototypes.h> to > support CONFIG_MODVERSIONS=y. > > Signed-off-by: Kai Huang <kai.huang@xxxxxxxxx> I thought you were going to introduce builtin functions for SEAMCALLs needed by KVM, instead? In any case, missing Signed-off-by. Paolo > --- > arch/x86/include/asm/asm-prototypes.h | 1 + > arch/x86/virt/vmx/tdx/seamcall.S | 4 ++++ > 2 files changed, 5 insertions(+) > > diff --git a/arch/x86/include/asm/asm-prototypes.h b/arch/x86/include/asm/asm-prototypes.h > index b1a98fa38828..0ec572ad75f1 100644 > --- a/arch/x86/include/asm/asm-prototypes.h > +++ b/arch/x86/include/asm/asm-prototypes.h > @@ -13,6 +13,7 @@ > #include <asm/preempt.h> > #include <asm/asm.h> > #include <asm/gsseg.h> > +#include <asm/tdx.h> > > #ifndef CONFIG_X86_CMPXCHG64 > extern void cmpxchg8b_emu(void); > diff --git a/arch/x86/virt/vmx/tdx/seamcall.S b/arch/x86/virt/vmx/tdx/seamcall.S > index 5b1f2286aea9..e32cf82ed47e 100644 > --- a/arch/x86/virt/vmx/tdx/seamcall.S > +++ b/arch/x86/virt/vmx/tdx/seamcall.S > @@ -1,5 +1,6 @@ > /* SPDX-License-Identifier: GPL-2.0 */ > #include <linux/linkage.h> > +#include <linux/export.h> > #include <asm/frame.h> > > #include "tdxcall.S" > @@ -21,6 +22,7 @@ > SYM_FUNC_START(__seamcall) > TDX_MODULE_CALL host=1 > SYM_FUNC_END(__seamcall) > +EXPORT_SYMBOL_GPL(__seamcall); > > /* > * __seamcall_ret() - Host-side interface functions to SEAM software > @@ -40,6 +42,7 @@ SYM_FUNC_END(__seamcall) > SYM_FUNC_START(__seamcall_ret) > TDX_MODULE_CALL host=1 ret=1 > SYM_FUNC_END(__seamcall_ret) > +EXPORT_SYMBOL_GPL(__seamcall_ret); > > /* > * __seamcall_saved_ret() - Host-side interface functions to SEAM software > @@ -59,3 +62,4 @@ SYM_FUNC_END(__seamcall_ret) > SYM_FUNC_START(__seamcall_saved_ret) > TDX_MODULE_CALL host=1 ret=1 saved=1 > SYM_FUNC_END(__seamcall_saved_ret) > +EXPORT_SYMBOL_GPL(__seamcall_saved_ret); > -- > 2.25.1 >
