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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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d3561b7fa0
Create a paravirt.h header for all the critical operations which need to be
replaced with hypervisor calls, and include that instead of defining native
operations, when CONFIG_PARAVIRT.
This patch does the dumbest possible replacement of paravirtualized
instructions: calls through a "paravirt_ops" structure. Currently these are
function implementations of native hardware: hypervisors will override the ops
structure with their own variants.
All the pv-ops functions are declared "fastcall" so that a specific
register-based ABI is used, to make inlining assember easier.
And:
+From: Andy Whitcroft <apw@shadowen.org>
The paravirt ops introduce a 'weak' attribute onto memory_setup().
Code ordering leads to the following warnings on x86:
arch/i386/kernel/setup.c:651: warning: weak declaration of
`memory_setup' after first use results in unspecified behavior
Move memory_setup() to avoid this.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Chris Wright <chrisw@sous-sol.org>
Signed-off-by: Andi Kleen <ak@suse.de>
Cc: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Zachary Amsden <zach@vmware.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
42 lines
733 B
C
42 lines
733 B
C
#ifndef _ASMi386_TIME_H
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#define _ASMi386_TIME_H
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#include <linux/efi.h>
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#include "mach_time.h"
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static inline unsigned long native_get_wallclock(void)
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{
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unsigned long retval;
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if (efi_enabled)
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retval = efi_get_time();
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else
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retval = mach_get_cmos_time();
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return retval;
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}
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static inline int native_set_wallclock(unsigned long nowtime)
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{
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int retval;
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if (efi_enabled)
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retval = efi_set_rtc_mmss(nowtime);
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else
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retval = mach_set_rtc_mmss(nowtime);
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return retval;
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}
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#ifdef CONFIG_PARAVIRT
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#include <asm/paravirt.h>
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#else /* !CONFIG_PARAVIRT */
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#define get_wallclock() native_get_wallclock()
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#define set_wallclock(x) native_set_wallclock(x)
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#define do_time_init() time_init_hook()
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#endif /* CONFIG_PARAVIRT */
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#endif
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