From: Juergen Gross <jgross@suse.com>
To: xen-devel@lists.xenproject.org, x86@kernel.org,
virtualization@lists.linux-foundation.org,
linux-kernel@vger.kernel.org
Cc: Juergen Gross <jgross@suse.com>, Deep Shah <sdeep@vmware.com>,
"VMware, Inc." <pv-drivers@vmware.com>,
Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
"H. Peter Anvin" <hpa@zytor.com>,
Peter Zijlstra <peterz@infradead.org>
Subject: [PATCH v7 12/14] x86/paravirt: add new macros PVOP_ALT* supporting pvops in ALTERNATIVEs
Date: Thu, 11 Mar 2021 15:23:17 +0100 [thread overview]
Message-ID: <20210311142319.4723-13-jgross@suse.com> (raw)
In-Reply-To: <20210311142319.4723-1-jgross@suse.com>
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>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
---
V3:
- drop ____PVOP_ALT_VCALL() macro
---
arch/x86/include/asm/paravirt_types.h | 49 ++++++++++++++++++++++++++-
1 file changed, 48 insertions(+), 1 deletion(-)
diff --git a/arch/x86/include/asm/paravirt_types.h b/arch/x86/include/asm/paravirt_types.h
index 0afdac83f926..0ed976286d49 100644
--- a/arch/x86/include/asm/paravirt_types.h
+++ b/arch/x86/include/asm/paravirt_types.h
@@ -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) \
--
2.26.2
next prev parent reply other threads:[~2021-03-11 14:24 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-11 14:23 [PATCH v7 00/14] x86: major paravirt cleanup Juergen Gross
2021-03-11 14:23 ` [PATCH v7 01/14] x86/alternative: merge include files Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/alternative: Merge " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 02/14] static_call: move struct static_call_key definition to static_call_types.h Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] static_call: Move " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 03/14] static_call: add function to query current function Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] static_call: Add " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 04/14] x86/paravirt: switch time pvops functions to use static_call() Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/paravirt: Switch " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 05/14] x86/alternative: support not-feature Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/alternative: Support not-feature tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 06/14] x86/alternative: support ALTERNATIVE_TERNARY Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/alternative: Support ALTERNATIVE_TERNARY tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 07/14] x86/alternative: don't open code ALTERNATIVE_TERNARY() in _static_cpu_has() Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/alternative: Use " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 08/14] x86: add new features for paravirt patching Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/paravirt: Add " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 09/14] x86/paravirt: remove no longer needed 32-bit pvops cruft Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/paravirt: Remove " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 10/14] x86/paravirt: simplify paravirt macros Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/paravirt: Simplify " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 11/14] x86/paravirt: switch iret pvops to ALTERNATIVE Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/paravirt: Switch " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` Juergen Gross [this message]
2021-03-12 11:54 ` [tip: x86/alternatives] x86/paravirt: Add new PVOP_ALT* macros to support pvops in ALTERNATIVEs tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 13/14] x86/paravirt: switch functions with custom code to ALTERNATIVE Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/paravirt: Switch " tip-bot2 for Juergen Gross
2021-03-11 14:23 ` [PATCH v7 14/14] x86/paravirt: have only one paravirt patch function Juergen Gross
2021-03-12 11:54 ` [tip: x86/alternatives] x86/paravirt: Have " tip-bot2 for Juergen Gross
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