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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-03 19:25:26 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-06-03 19:25:26 +0000 |
| commit | ef6fed2eb60f1d490dd8c6b7a5ae88c29e77522a (patch) | |
| tree | c7830d9586142e9f5d69374f645bf313244797bc /arch/x86/entry | |
| parent | Adding debian version 5.10.216-1. (diff) | |
| download | linux-ef6fed2eb60f1d490dd8c6b7a5ae88c29e77522a.tar.xz linux-ef6fed2eb60f1d490dd8c6b7a5ae88c29e77522a.zip | |
Merging upstream version 5.10.218.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/entry_64.S | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 1631a9a15..bd785386d 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -46,14 +46,6 @@ .code64 .section .entry.text, "ax" -#ifdef CONFIG_PARAVIRT_XXL -SYM_CODE_START(native_usergs_sysret64) - UNWIND_HINT_EMPTY - swapgs - sysretq -SYM_CODE_END(native_usergs_sysret64) -#endif /* CONFIG_PARAVIRT_XXL */ - /* * 64-bit SYSCALL instruction entry. Up to 6 arguments in registers. * @@ -128,7 +120,12 @@ SYM_INNER_LABEL(entry_SYSCALL_64_after_hwframe, SYM_L_GLOBAL) * Try to use SYSRET instead of IRET if we're returning to * a completely clean 64-bit userspace context. If we're not, * go to the slow exit path. + * In the Xen PV case we must use iret anyway. */ + + ALTERNATIVE "", "jmp swapgs_restore_regs_and_return_to_usermode", \ + X86_FEATURE_XENPV + movq RCX(%rsp), %rcx movq RIP(%rsp), %r11 @@ -220,7 +217,9 @@ syscall_return_via_sysret: popq %rdi popq %rsp - USERGS_SYSRET64 + swapgs + CLEAR_CPU_BUFFERS + sysretq SYM_CODE_END(entry_SYSCALL_64) /* |