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x86/paravirt: Add new PVOP_ALT* macros to support pvops in ALTERNATIVEs

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Instead of using paravirt patching for custom code sequences add
support for using ALTERNATIVE handling combined with paravirt call
patching.

Signed-off-by: Juergen Gross <jgross@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20210311142319.4723-13-jgross@suse.com
This commit is contained in:
Juergen Gross 2021-03-11 15:23:17 +01:00 committed by Borislav Petkov
parent ae755b5a45
commit 00aa3193ab
1 changed files with 48 additions and 1 deletions
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49
arch/x86/include/asm/paravirt_types.h
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@ -477,44 +477,91 @@ int paravirt_disable_iospace(void);
ret; \
})
#define ____PVOP_ALT_CALL(ret, op, alt, cond, clbr, call_clbr, \
extra_clbr, ...) \
({ \
PVOP_CALL_ARGS; \
PVOP_TEST_NULL(op); \
asm volatile(ALTERNATIVE(paravirt_alt(PARAVIRT_CALL), \
alt, cond) \
: call_clbr, ASM_CALL_CONSTRAINT \
: paravirt_type(op), \
paravirt_clobber(clbr), \
##__VA_ARGS__ \
: "memory", "cc" extra_clbr); \
ret; \
})
#define __PVOP_CALL(rettype, op, ...) \
____PVOP_CALL(PVOP_RETVAL(rettype), op, CLBR_ANY, \
PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, ##__VA_ARGS__)
#define __PVOP_ALT_CALL(rettype, op, alt, cond, ...) \
____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op, alt, cond, CLBR_ANY,\
PVOP_CALL_CLOBBERS, EXTRA_CLOBBERS, \
##__VA_ARGS__)
#define __PVOP_CALLEESAVE(rettype, op, ...) \
____PVOP_CALL(PVOP_RETVAL(rettype), op.func, CLBR_RET_REG, \
PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__)
#define __PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, ...) \
____PVOP_ALT_CALL(PVOP_RETVAL(rettype), op.func, alt, cond, \
CLBR_RET_REG, PVOP_CALLEE_CLOBBERS, , ##__VA_ARGS__)
#define __PVOP_VCALL(op, ...) \
(void)____PVOP_CALL(, op, CLBR_ANY, PVOP_VCALL_CLOBBERS, \
VEXTRA_CLOBBERS, ##__VA_ARGS__)
#define __PVOP_ALT_VCALL(op, alt, cond, ...) \
(void)____PVOP_ALT_CALL(, op, alt, cond, CLBR_ANY, \
PVOP_VCALL_CLOBBERS, VEXTRA_CLOBBERS, \
##__VA_ARGS__)
#define __PVOP_VCALLEESAVE(op, ...) \
(void)____PVOP_CALL(, op.func, CLBR_RET_REG, \
PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__)
PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__)
#define __PVOP_ALT_VCALLEESAVE(op, alt, cond, ...) \
(void)____PVOP_ALT_CALL(, op.func, alt, cond, CLBR_RET_REG, \
PVOP_VCALLEE_CLOBBERS, , ##__VA_ARGS__)
#define PVOP_CALL0(rettype, op) \
__PVOP_CALL(rettype, op)
#define PVOP_VCALL0(op) \
__PVOP_VCALL(op)
#define PVOP_ALT_CALL0(rettype, op, alt, cond) \
__PVOP_ALT_CALL(rettype, op, alt, cond)
#define PVOP_ALT_VCALL0(op, alt, cond) \
__PVOP_ALT_VCALL(op, alt, cond)
#define PVOP_CALLEE0(rettype, op) \
__PVOP_CALLEESAVE(rettype, op)
#define PVOP_VCALLEE0(op) \
__PVOP_VCALLEESAVE(op)
#define PVOP_ALT_CALLEE0(rettype, op, alt, cond) \
__PVOP_ALT_CALLEESAVE(rettype, op, alt, cond)
#define PVOP_ALT_VCALLEE0(op, alt, cond) \
__PVOP_ALT_VCALLEESAVE(op, alt, cond)
#define PVOP_CALL1(rettype, op, arg1) \
__PVOP_CALL(rettype, op, PVOP_CALL_ARG1(arg1))
#define PVOP_VCALL1(op, arg1) \
__PVOP_VCALL(op, PVOP_CALL_ARG1(arg1))
#define PVOP_ALT_VCALL1(op, arg1, alt, cond) \
__PVOP_ALT_VCALL(op, alt, cond, PVOP_CALL_ARG1(arg1))
#define PVOP_CALLEE1(rettype, op, arg1) \
__PVOP_CALLEESAVE(rettype, op, PVOP_CALL_ARG1(arg1))
#define PVOP_VCALLEE1(op, arg1) \
__PVOP_VCALLEESAVE(op, PVOP_CALL_ARG1(arg1))
#define PVOP_ALT_CALLEE1(rettype, op, arg1, alt, cond) \
__PVOP_ALT_CALLEESAVE(rettype, op, alt, cond, PVOP_CALL_ARG1(arg1))
#define PVOP_ALT_VCALLEE1(op, arg1, alt, cond) \
__PVOP_ALT_VCALLEESAVE(op, alt, cond, PVOP_CALL_ARG1(arg1))
#define PVOP_CALL2(rettype, op, arg1, arg2) \