On Tue, Oct 27, 2020 at 09:16:17AM -0400, Arvind Sankar wrote:
> The #PF handler is already there now with the SEV-ES series, but I agree
> it would still complicate things. It's simpler to just increase
> BOOT_PGT_SIZE and make it unconditional (i.e. bump it to say 32 or 64
> even if !KASLR).
On Tue, Oct 27, 2020 at 03:40:07PM +0300, Kirill A. Shutemov wrote:
> BTW, what happens if we underestimate BOOT_PGT_SIZE? Do we overwrite
> something?
The boot code will print an error and stop the machine when allocating a
page-table page fails.
I also think that bumping BOOT_PGT_SIZE up to
On Tue, Oct 27, 2020 at 03:40:07PM +0300, Kirill A. Shutemov wrote:
> On Sat, Oct 24, 2020 at 08:41:58PM -0400, Arvind Sankar wrote:
> > Hi, I think the definition of BOOT_PGT_SIZE in
> > arch/x86/include/asm/boot.h is insufficient, especially after
> > ca0e22d4f011 ("x86/boot/compressed/64:
On Sat, Oct 24, 2020 at 08:41:58PM -0400, Arvind Sankar wrote:
> Hi, I think the definition of BOOT_PGT_SIZE in
> arch/x86/include/asm/boot.h is insufficient, especially after
> ca0e22d4f011 ("x86/boot/compressed/64: Always switch to own page table")
>
> Currently, it allocates 6 pages if KASLR
On Sat, Oct 24, 2020 at 08:41:58PM -0400, Arvind Sankar wrote:
> Hi, I think the definition of BOOT_PGT_SIZE in
> arch/x86/include/asm/boot.h is insufficient, especially after
> ca0e22d4f011 ("x86/boot/compressed/64: Always switch to own page table")
>
> Currently, it allocates 6 pages if KASLR
Hi, I think the definition of BOOT_PGT_SIZE in
arch/x86/include/asm/boot.h is insufficient, especially after
ca0e22d4f011 ("x86/boot/compressed/64: Always switch to own page table")
Currently, it allocates 6 pages if KASLR is disabled, and either 17 or
19 pages depending on X86_VERBOSE_BOOTUP
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