diff options
| author | Joerg Roedel <jroedel@suse.de> | 2021-12-02 18:32:25 +0300 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2021-12-06 11:54:10 +0300 |
| commit | 71d5049b053876afbde6c3273250b76935494ab2 (patch) | |
| tree | 262b29644cef0c1009776942ea327eff8dbb64e9 /arch/x86/include/asm/realmode.h | |
| parent | f154f290855b070cc94dd44ad253c0ef8a9337bb (diff) | |
| download | linux-71d5049b053876afbde6c3273250b76935494ab2.tar.xz | |
x86/mm: Flush global TLB when switching to trampoline page-table
Move the switching code into a function so that it can be re-used and
add a global TLB flush. This makes sure that usage of memory which is
not mapped in the trampoline page-table is reliably caught.
Also move the clearing of CR4.PCIDE before the CR3 switch because the
cr4_clear_bits() function will access data not mapped into the
trampoline page-table.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Signed-off-by: Borislav Petkov <bp@suse.de>
Link: https://lore.kernel.org/r/20211202153226.22946-4-joro@8bytes.org
Diffstat (limited to 'arch/x86/include/asm/realmode.h')
| -rw-r--r-- | arch/x86/include/asm/realmode.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/x86/include/asm/realmode.h b/arch/x86/include/asm/realmode.h index 5db5d083c873..331474b150f1 100644 --- a/arch/x86/include/asm/realmode.h +++ b/arch/x86/include/asm/realmode.h @@ -89,6 +89,7 @@ static inline void set_real_mode_mem(phys_addr_t mem) } void reserve_real_mode(void); +void load_trampoline_pgtable(void); #endif /* __ASSEMBLY__ */ |