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. Reviewed-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx> Signed-off-by: Kai Huang <kai.huang@xxxxxxxxx> --- v6 -> v7: - Removed the helper to convert kernel page level to TDX page level. - Changed to use macro to define TDX supported page sizes. --- arch/x86/coco/tdx/tdx.c | 6 +++--- arch/x86/include/asm/tdx.h | 9 +++++++++ 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/arch/x86/coco/tdx/tdx.c b/arch/x86/coco/tdx/tdx.c index cfd4c95b9f04..7fa7fb54f438 100644 --- a/arch/x86/coco/tdx/tdx.c +++ b/arch/x86/coco/tdx/tdx.c @@ -722,13 +722,13 @@ static bool 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 false; diff --git a/arch/x86/include/asm/tdx.h b/arch/x86/include/asm/tdx.h index 28d889c9aa16..e9a3f4a6fba1 100644 --- a/arch/x86/include/asm/tdx.h +++ b/arch/x86/include/asm/tdx.h @@ -20,6 +20,15 @@ #ifndef __ASSEMBLY__ +/* + * TDX supported page sizes (4K/2M/1G). + * + * Those values are part of the TDX module ABI. Do not change them. + */ +#define TDX_PS_4K 0 +#define TDX_PS_2M 1 +#define TDX_PS_1G 2 + /* * Used to gather the output registers values of the TDCALL and SEAMCALL * instructions when requesting services from the TDX module. -- 2.38.1