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Revert "x86/pvh: Call C code via the kernel virtual mapping"

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This reverts commit 83d123e276 which is
commit e8fbc0d9cab6c1ee6403f42c0991b0c1d5dbc092 upstream.

It causes boot failures of domU guests, and should be reverted.

Cc: Jason Andryuk <jason.andryuk@amd.com>
Cc: Ard Biesheuvel <ardb@kernel.org>
Cc: Juergen Gross <jgross@suse.com>
Cc: Sasha Levin <sashal@kernel.org>
Reported-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com>
Link: https://lore.kernel.org/r/Z1l6XbHP6BTTZSwr@mail-itl
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Greg Kroah-Hartman
2024-12-11 15:22:28 +01:00
parent 22a054ea1f
commit dd47f71759
1 changed files with 1 additions and 8 deletions
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9
arch/x86/platform/pvh/head.S
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@@ -107,14 +107,7 @@ SYM_CODE_START_LOCAL(pvh_start_xen)
movq %rbp, %rbx
subq $_pa(pvh_start_xen), %rbx
movq %rbx, phys_base(%rip)
/* Call xen_prepare_pvh() via the kernel virtual mapping */
leaq xen_prepare_pvh(%rip), %rax
subq phys_base(%rip), %rax
addq $__START_KERNEL_map, %rax
ANNOTATE_RETPOLINE_SAFE
call *%rax
call xen_prepare_pvh
/*
* Clear phys_base. __startup_64 will *add* to its value,
* so reset to 0.