Update public headers and hypercall-abi doc as a consequence of commit
2f531c122e95 ("x86: limit number of hypercall parameters to 5").Signed-off-by: Michal Orzel <[email protected]> --- docs/guest-guide/x86/hypercall-abi.rst | 8 ++++---- xen/include/public/arch-x86/xen-x86_32.h | 2 +- xen/include/public/arch-x86/xen-x86_64.h | 2 +- 3 files changed, 6 insertions(+), 6 deletions(-) diff --git a/docs/guest-guide/x86/hypercall-abi.rst b/docs/guest-guide/x86/hypercall-abi.rst index 14c48929d748..7b17af720566 100644 --- a/docs/guest-guide/x86/hypercall-abi.rst +++ b/docs/guest-guide/x86/hypercall-abi.rst @@ -4,7 +4,7 @@ Hypercall ABI ============= Hypercalls are system calls to Xen. Two modes of guest operation are -supported, and up to 6 individual parameters are supported. +supported, and up to 5 individual parameters are supported. Hypercalls may only be issued by kernel-level software [1]_. @@ -18,17 +18,17 @@ The registers used for hypercalls depends on the operating mode of the guest. * - ABI - Hypercall Index - - Parameters (1 - 6) + - Parameters (1 - 5) - Result * - 64bit - RAX - - RDI RSI RDX R10 R8 R9 + - RDI RSI RDX R10 R8 - RAX * - 32bit - EAX - - EBX ECX EDX ESI EDI EBP + - EBX ECX EDX ESI EDI - EAX 32 and 64bit PV guests have an ABI fixed by their guest type. The ABI for an diff --git a/xen/include/public/arch-x86/xen-x86_32.h b/xen/include/public/arch-x86/xen-x86_32.h index 139438e83534..9e3bf06b121e 100644 --- a/xen/include/public/arch-x86/xen-x86_32.h +++ b/xen/include/public/arch-x86/xen-x86_32.h @@ -12,7 +12,7 @@ /* * Hypercall interface: - * Input: %ebx, %ecx, %edx, %esi, %edi, %ebp (arguments 1-6) + * Input: %ebx, %ecx, %edx, %esi, %edi (arguments 1-5) * Output: %eax * Access is via hypercall page (set up by guest loader or via a Xen MSR): * call hypercall_page + hypercall-number * 32 diff --git a/xen/include/public/arch-x86/xen-x86_64.h b/xen/include/public/arch-x86/xen-x86_64.h index 5d9035ed2230..43f6e3d22001 100644 --- a/xen/include/public/arch-x86/xen-x86_64.h +++ b/xen/include/public/arch-x86/xen-x86_64.h @@ -12,7 +12,7 @@ /* * Hypercall interface: - * Input: %rdi, %rsi, %rdx, %r10, %r8, %r9 (arguments 1-6) + * Input: %rdi, %rsi, %rdx, %r10, %r8 (arguments 1-5) * Output: %rax * Access is via hypercall page (set up by guest loader or via a Xen MSR): * call hypercall_page + hypercall-number * 32 -- 2.25.1
