diff options
| author | Hou Wenlong <houwenlong.hwl@antgroup.com> | 2026-01-10 12:00:08 +0800 |
|---|---|---|
| committer | Sasha Levin <sashal@kernel.org> | 2026-03-04 07:19:36 -0500 |
| commit | cafb6771757cbcf9ea10c93a2670dd0dc2d174f5 (patch) | |
| tree | ce0c6c903bdaba5dc3f8b81cecadf4296246df8b /arch/x86 | |
| parent | 852475278ca5e96e0c0275950e1a84203e602b33 (diff) | |
x86/xen/pvh: Enable PAE mode for 32-bit guest only when CONFIG_X86_PAE is set
[ Upstream commit db9aded979b491a24871e1621cd4e8822dbca859 ]
The PVH entry is available for 32-bit KVM guests, and 32-bit KVM guests
do not depend on CONFIG_X86_PAE. However, mk_early_pgtbl_32() builds
different pagetables depending on whether CONFIG_X86_PAE is set.
Therefore, enabling PAE mode for 32-bit KVM guests without
CONFIG_X86_PAE being set would result in a boot failure during CR3
loading.
Signed-off-by: Hou Wenlong <houwenlong.hwl@antgroup.com>
Reviewed-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Message-ID: <d09ce9a134eb9cbc16928a5b316969f8ba606b81.1768017442.git.houwenlong.hwl@antgroup.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/platform/pvh/head.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/x86/platform/pvh/head.S b/arch/x86/platform/pvh/head.S index 344030c1a81d..53ee2d53fcf8 100644 --- a/arch/x86/platform/pvh/head.S +++ b/arch/x86/platform/pvh/head.S @@ -91,10 +91,12 @@ SYM_CODE_START(pvh_start_xen) leal rva(early_stack_end)(%ebp), %esp +#if defined(CONFIG_X86_64) || defined(CONFIG_X86_PAE) /* Enable PAE mode. */ mov %cr4, %eax orl $X86_CR4_PAE, %eax mov %eax, %cr4 +#endif #ifdef CONFIG_X86_64 /* Enable Long mode. */ |