From: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
x86@kernel.org, Paolo Bonzini <pbonzini@redhat.com>,
David Hildenbrand <david@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Josh Poimboeuf <jpoimboe@redhat.com>,
"H . Peter Anvin" <hpa@zytor.com>
Cc: Dave Hansen <dave.hansen@intel.com>,
Tony Luck <tony.luck@intel.com>,
Dan Williams <dan.j.williams@intel.com>,
Andi Kleen <ak@linux.intel.com>,
Kirill Shutemov <kirill.shutemov@linux.intel.com>,
Sean Christopherson <seanjc@google.com>,
Kuppuswamy Sathyanarayanan <knsathya@kernel.org>,
linux-kernel@vger.kernel.org
Subject: [PATCH v7 01/10] x86/io: Allow to override inX() and outX() implementation
Date: Tue, 5 Oct 2021 13:41:27 -0700 [thread overview]
Message-ID: <20211005204136.1812078-2-sathyanarayanan.kuppuswamy@linux.intel.com> (raw)
In-Reply-To: <20211005204136.1812078-1-sathyanarayanan.kuppuswamy@linux.intel.com>
From: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com>
The patch allows to override the implementation of the port IO
helpers. TDX code will provide an implementation that redirect the
helpers to paravirt calls.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Reviewed-by: Andi Kleen <ak@linux.intel.com>
Reviewed-by: Tony Luck <tony.luck@intel.com>
Signed-off-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
---
Changes since v6:
* None
Changes since v5:
* None
Changes since v4:
* None
Changes since v3:
* None
Changes since v2:
* None
arch/x86/include/asm/io.h | 16 ++++++++++++----
1 file changed, 12 insertions(+), 4 deletions(-)
diff --git a/arch/x86/include/asm/io.h b/arch/x86/include/asm/io.h
index 5c6a4af0b911..3647a96238a9 100644
--- a/arch/x86/include/asm/io.h
+++ b/arch/x86/include/asm/io.h
@@ -271,18 +271,26 @@ static inline bool sev_key_active(void) { return false; }
#endif /* CONFIG_AMD_MEM_ENCRYPT */
+#ifndef __out
+#define __out(bwl, bw) \
+ asm volatile("out" #bwl " %" #bw "0, %w1" : : "a"(value), "Nd"(port))
+#endif
+
+#ifndef __in
+#define __in(bwl, bw) \
+ asm volatile("in" #bwl " %w1, %" #bw "0" : "=a"(value) : "Nd"(port))
+#endif
+
#define BUILDIO(bwl, bw, type) \
static inline void out##bwl(unsigned type value, int port) \
{ \
- asm volatile("out" #bwl " %" #bw "0, %w1" \
- : : "a"(value), "Nd"(port)); \
+ __out(bwl, bw); \
} \
\
static inline unsigned type in##bwl(int port) \
{ \
unsigned type value; \
- asm volatile("in" #bwl " %w1, %" #bw "0" \
- : "=a"(value) : "Nd"(port)); \
+ __in(bwl, bw); \
return value; \
} \
\
--
2.25.1
next prev parent reply other threads:[~2021-10-05 20:42 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-10-05 20:41 [PATCH v7 00/10] Add TDX Guest Support (#VE handler support) Kuppuswamy Sathyanarayanan
2021-10-05 20:41 ` Kuppuswamy Sathyanarayanan [this message]
2021-10-17 19:27 ` [PATCH v7 01/10] x86/io: Allow to override inX() and outX() implementation Thomas Gleixner
2021-10-17 20:17 ` Sathyanarayanan Kuppuswamy
2021-10-05 20:41 ` [PATCH v7 02/10] x86/tdx: Add early_is_tdx_guest() interface Kuppuswamy Sathyanarayanan
2021-10-17 19:28 ` Thomas Gleixner
2021-10-05 20:41 ` [PATCH v7 03/10] x86/tdx: Handle port I/O in decompression code Kuppuswamy Sathyanarayanan
2021-10-05 20:41 ` [PATCH v7 04/10] x86/tdx: Handle early IO operations Kuppuswamy Sathyanarayanan
2021-11-05 21:12 ` Sean Christopherson
2021-11-05 23:08 ` Sathyanarayanan Kuppuswamy
2021-10-05 20:41 ` [PATCH v7 05/10] x86/tdx: Handle port I/O Kuppuswamy Sathyanarayanan
2021-10-17 19:58 ` Thomas Gleixner
2021-10-17 20:35 ` Sathyanarayanan Kuppuswamy
2021-10-18 13:52 ` Tom Lendacky
2021-10-18 18:42 ` Sathyanarayanan Kuppuswamy
2021-11-05 21:23 ` Sean Christopherson
2021-10-05 20:41 ` [PATCH v7 06/10] x86/insn-eval: Introduce insn_get_modrm_reg_ptr() Kuppuswamy Sathyanarayanan
2021-10-05 20:41 ` [PATCH v7 07/10] x86/insn-eval: Introduce insn_decode_mmio() Kuppuswamy Sathyanarayanan
2021-10-05 20:41 ` [PATCH v7 08/10] x86/sev-es: Use insn_decode_mmio() for MMIO implementation Kuppuswamy Sathyanarayanan
2021-10-05 20:41 ` [PATCH v7 09/10] x86/tdx: Handle in-kernel MMIO Kuppuswamy Sathyanarayanan
2021-11-05 22:41 ` Sean Christopherson
2021-10-05 20:41 ` [PATCH v7 10/10] x86/tdx: Handle MWAIT and MONITOR Kuppuswamy Sathyanarayanan
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