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x86/virt/tdx: Define TDX supported page sizes as macros

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TDX supports 4K, 2M and 1G page sizes.  The corresponding values are
defined by the TDX module spec and used as TDX module ABI.  Currently,
they are used in try_accept_one() when the TDX guest tries to accept a
page.  However currently try_accept_one() uses hard-coded magic values.

Define TDX supported page sizes as macros and get rid of the hard-coded
values in try_accept_one().  TDX host support will need to use them too.

Signed-off-by: Kai Huang <kai.huang@intel.com>
Signed-off-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Dave Hansen <dave.hansen@linux.intel.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Link: https://lore.kernel.org/all/20231208170740.53979-2-dave.hansen%40intel.com
This commit is contained in:
Kai Huang 2023-12-08 09:07:22 -08:00 committed by Dave Hansen
parent 765a0542fd
commit d623704bb2
2 changed files with 8 additions and 3 deletions
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6
arch/x86/coco/tdx/tdx-shared.c
View File

@ -22,13 +22,13 @@ static unsigned long try_accept_one(phys_addr_t start, unsigned long len,
*/
switch (pg_level) {
case PG_LEVEL_4K:
page_size = 0;
page_size = TDX_PS_4K;
break;
case PG_LEVEL_2M:
page_size = 1;
page_size = TDX_PS_2M;
break;
case PG_LEVEL_1G:
page_size = 2;
page_size = TDX_PS_1G;
break;
default:
return 0;

5
arch/x86/include/asm/shared/tdx.h
View File

@ -55,6 +55,11 @@
(TDX_RDX | TDX_RBX | TDX_RSI | TDX_RDI | TDX_R8 | TDX_R9 | \
TDX_R10 | TDX_R11 | TDX_R12 | TDX_R13 | TDX_R14 | TDX_R15)
/* TDX supported page sizes from the TDX module ABI. */
#define TDX_PS_4K 0
#define TDX_PS_2M 1
#define TDX_PS_1G 2
#ifndef __ASSEMBLY__
#include <linux/compiler_attributes.h>