diff options
author | Kai Huang <kai.huang@intel.com> | 2023-08-15 14:02:03 +0300 |
---|---|---|
committer | Dave Hansen <dave.hansen@linux.intel.com> | 2023-09-13 02:30:14 +0300 |
commit | 8a8544bde858e5d62d79df6baaa387e0b6587dc7 (patch) | |
tree | 5d92a4096a19646c64cfd323f991f597c08a970b /arch/x86/include/asm/shared | |
parent | 90f5ecd37faed9a59eb2788a56dac8deeee0a508 (diff) | |
download | linux-8a8544bde858e5d62d79df6baaa387e0b6587dc7.tar.xz |
x86/tdx: Remove 'struct tdx_hypercall_args'
Now 'struct tdx_hypercall_args' is basically 'struct tdx_module_args'
minus RCX. Although from __tdx_hypercall()'s perspective RCX isn't
used as shared register thus not part of input/output registers, it's
not worth to have a separate structure just due to one register.
Remove the 'struct tdx_hypercall_args' and use 'struct tdx_module_args'
instead in __tdx_hypercall() related code. This also saves the memory
copy between the two structures within __tdx_hypercall().
Suggested-by: Peter Zijlstra <peterz@infradead.org>
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>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lore.kernel.org/all/798dad5ce24e9d745cf0e16825b75ccc433ad065.1692096753.git.kai.huang%40intel.com
Diffstat (limited to 'arch/x86/include/asm/shared')
-rw-r--r-- | arch/x86/include/asm/shared/tdx.h | 25 |
1 files changed, 2 insertions, 23 deletions
diff --git a/arch/x86/include/asm/shared/tdx.h b/arch/x86/include/asm/shared/tdx.h index f53a41948946..b69886ee1c63 100644 --- a/arch/x86/include/asm/shared/tdx.h +++ b/arch/x86/include/asm/shared/tdx.h @@ -85,29 +85,8 @@ u64 __tdcall(u64 fn, struct tdx_module_args *args); u64 __tdcall_ret(u64 fn, struct tdx_module_args *args); u64 __tdcall_saved_ret(u64 fn, struct tdx_module_args *args); -/* - * Used in __tdx_hypercall() to pass down and get back registers' values of - * the TDCALL instruction when requesting services from the VMM. - * - * This is a software only structure and not part of the TDX module/VMM ABI. - */ -struct tdx_hypercall_args { - u64 r8; - u64 r9; - u64 r10; - u64 r11; - u64 r12; - u64 r13; - u64 r14; - u64 r15; - u64 rdi; - u64 rsi; - u64 rbx; - u64 rdx; -}; - /* Used to request services from the VMM */ -u64 __tdx_hypercall(struct tdx_hypercall_args *args); +u64 __tdx_hypercall(struct tdx_module_args *args); /* * Wrapper for standard use of __tdx_hypercall with no output aside from @@ -115,7 +94,7 @@ u64 __tdx_hypercall(struct tdx_hypercall_args *args); */ static inline u64 _tdx_hypercall(u64 fn, u64 r12, u64 r13, u64 r14, u64 r15) { - struct tdx_hypercall_args args = { + struct tdx_module_args args = { .r10 = TDX_HYPERCALL_STANDARD, .r11 = fn, .r12 = r12, |