mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 00:34:20 +08:00
6dcc5627f6
These are all functions which are invoked from elsewhere, so annotate them as global using the new SYM_FUNC_START and their ENDPROC's by SYM_FUNC_END. Make sure ENTRY/ENDPROC is not defined on X86_64, given these were the last users. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Signed-off-by: Borislav Petkov <bp@suse.de> Reviewed-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> [hibernate] Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> [xen bits] Acked-by: Herbert Xu <herbert@gondor.apana.org.au> [crypto] Cc: Allison Randal <allison@lohutok.net> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Andy Lutomirski <luto@kernel.org> Cc: Andy Shevchenko <andy@infradead.org> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org> Cc: Armijn Hemel <armijn@tjaldur.nl> Cc: Cao jin <caoj.fnst@cn.fujitsu.com> Cc: Darren Hart <dvhart@infradead.org> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Enrico Weigelt <info@metux.net> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Herbert Xu <herbert@gondor.apana.org.au> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jim Mattson <jmattson@google.com> Cc: Joerg Roedel <joro@8bytes.org> Cc: Josh Poimboeuf <jpoimboe@redhat.com> Cc: Juergen Gross <jgross@suse.com> Cc: Kate Stewart <kstewart@linuxfoundation.org> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: kvm ML <kvm@vger.kernel.org> Cc: Len Brown <len.brown@intel.com> Cc: linux-arch@vger.kernel.org Cc: linux-crypto@vger.kernel.org Cc: linux-efi <linux-efi@vger.kernel.org> Cc: linux-efi@vger.kernel.org Cc: linux-pm@vger.kernel.org Cc: Mark Rutland <mark.rutland@arm.com> Cc: Matt Fleming <matt@codeblueprint.co.uk> Cc: Paolo Bonzini <pbonzini@redhat.com> Cc: Pavel Machek <pavel@ucw.cz> Cc: Peter Zijlstra <peterz@infradead.org> Cc: platform-driver-x86@vger.kernel.org Cc: "Radim Krčmář" <rkrcmar@redhat.com> Cc: Sean Christopherson <sean.j.christopherson@intel.com> Cc: Stefano Stabellini <sstabellini@kernel.org> Cc: "Steven Rostedt (VMware)" <rostedt@goodmis.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Vitaly Kuznetsov <vkuznets@redhat.com> Cc: Wanpeng Li <wanpengli@tencent.com> Cc: Wei Huang <wei@redhat.com> Cc: x86-ml <x86@kernel.org> Cc: xen-devel@lists.xenproject.org Cc: Xiaoyao Li <xiaoyao.li@linux.intel.com> Link: https://lkml.kernel.org/r/20191011115108.12392-25-jslaby@suse.cz
101 lines
1.9 KiB
ArmAsm
101 lines
1.9 KiB
ArmAsm
/* SPDX-License-Identifier: GPL-2.0-only */
|
|
/*
|
|
* AMD Memory Encryption Support
|
|
*
|
|
* Copyright (C) 2017 Advanced Micro Devices, Inc.
|
|
*
|
|
* Author: Tom Lendacky <thomas.lendacky@amd.com>
|
|
*/
|
|
|
|
#include <linux/linkage.h>
|
|
|
|
#include <asm/processor-flags.h>
|
|
#include <asm/msr.h>
|
|
#include <asm/asm-offsets.h>
|
|
|
|
.text
|
|
.code32
|
|
SYM_FUNC_START(get_sev_encryption_bit)
|
|
xor %eax, %eax
|
|
|
|
#ifdef CONFIG_AMD_MEM_ENCRYPT
|
|
push %ebx
|
|
push %ecx
|
|
push %edx
|
|
|
|
/* Check if running under a hypervisor */
|
|
movl $1, %eax
|
|
cpuid
|
|
bt $31, %ecx /* Check the hypervisor bit */
|
|
jnc .Lno_sev
|
|
|
|
movl $0x80000000, %eax /* CPUID to check the highest leaf */
|
|
cpuid
|
|
cmpl $0x8000001f, %eax /* See if 0x8000001f is available */
|
|
jb .Lno_sev
|
|
|
|
/*
|
|
* Check for the SEV feature:
|
|
* CPUID Fn8000_001F[EAX] - Bit 1
|
|
* CPUID Fn8000_001F[EBX] - Bits 5:0
|
|
* Pagetable bit position used to indicate encryption
|
|
*/
|
|
movl $0x8000001f, %eax
|
|
cpuid
|
|
bt $1, %eax /* Check if SEV is available */
|
|
jnc .Lno_sev
|
|
|
|
movl $MSR_AMD64_SEV, %ecx /* Read the SEV MSR */
|
|
rdmsr
|
|
bt $MSR_AMD64_SEV_ENABLED_BIT, %eax /* Check if SEV is active */
|
|
jnc .Lno_sev
|
|
|
|
movl %ebx, %eax
|
|
andl $0x3f, %eax /* Return the encryption bit location */
|
|
jmp .Lsev_exit
|
|
|
|
.Lno_sev:
|
|
xor %eax, %eax
|
|
|
|
.Lsev_exit:
|
|
pop %edx
|
|
pop %ecx
|
|
pop %ebx
|
|
|
|
#endif /* CONFIG_AMD_MEM_ENCRYPT */
|
|
|
|
ret
|
|
SYM_FUNC_END(get_sev_encryption_bit)
|
|
|
|
.code64
|
|
SYM_FUNC_START(set_sev_encryption_mask)
|
|
#ifdef CONFIG_AMD_MEM_ENCRYPT
|
|
push %rbp
|
|
push %rdx
|
|
|
|
movq %rsp, %rbp /* Save current stack pointer */
|
|
|
|
call get_sev_encryption_bit /* Get the encryption bit position */
|
|
testl %eax, %eax
|
|
jz .Lno_sev_mask
|
|
|
|
bts %rax, sme_me_mask(%rip) /* Create the encryption mask */
|
|
|
|
.Lno_sev_mask:
|
|
movq %rbp, %rsp /* Restore original stack pointer */
|
|
|
|
pop %rdx
|
|
pop %rbp
|
|
#endif
|
|
|
|
xor %rax, %rax
|
|
ret
|
|
SYM_FUNC_END(set_sev_encryption_mask)
|
|
|
|
.data
|
|
|
|
#ifdef CONFIG_AMD_MEM_ENCRYPT
|
|
.balign 8
|
|
SYM_DATA(sme_me_mask, .quad 0)
|
|
#endif
|