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x86/paravirt: Drop {read,write}_cr8() hooks

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There is a lot of infrastructure for functionality which is used
exclusively in __{save,restore}_processor_state() on the suspend/resume
path.

cr8 is an alias of APIC_TASKPRI, and APIC_TASKPRI is saved/restored by
lapic_{suspend,resume}().  Saving and restoring cr8 independently of the
rest of the Local APIC state isn't a clever thing to be doing.

Delete the suspend/resume cr8 handling, which shrinks the size of struct
saved_context, and allows for the removal of both PVOPS.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Juergen Gross <jgross@suse.com>
Link: https://lkml.kernel.org/r/20190715151641.29210-1-andrew.cooper3@citrix.com
This commit is contained in:
Andrew Cooper
2019-07-15 16:16:41 +01:00
committed by Thomas Gleixner
parent 229b969b3d
commit 83b584d9c6
8 changed files with 1 additions and 66 deletions
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arch/x86/kernel/asm-offsets_64.c
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@@ -62,7 +62,6 @@ int main(void)
ENTRY(cr2);
ENTRY(cr3);
ENTRY(cr4);
ENTRY(cr8);
ENTRY(gdt_desc);
BLANK();
#undef ENTRY