[edk2-devel] [PATCH V8 10/47] MdePkg: Support IoRead/IoWrite for Tdx guest in BaseIoLibIntrinsic
Min Xu
min.m.xu at intel.com
Sat Mar 12 01:53:35 UTC 2022
RFC: https://bugzilla.tianocore.org/show_bug.cgi?id=3429
This commit supports IoRead/IoWrite for SEV/TDX/Legacy guest in one
binary. It checks the guest type in runtime and then call corresponding
functions.
Cc: Michael D Kinney <michael.d.kinney at intel.com>
Cc: Liming Gao <gaoliming at byosoft.com.cn>
Cc: Zhiguang Liu <zhiguang.liu at intel.com>
Cc: Brijesh Singh <brijesh.singh at amd.com>
Cc: Erdem Aktas <erdemaktas at google.com>
Cc: James Bottomley <jejb at linux.ibm.com>
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Tom Lendacky <thomas.lendacky at amd.com>
Cc: Gerd Hoffmann <kraxel at redhat.com>
Acked-by: Gerd Hoffmann <kraxel at redhat.com>
Reviewed-by: Liming Gao <gaoliming at byosoft.com.cn>
Signed-off-by: Min Xu <min.m.xu at intel.com>
---
MdePkg/Library/BaseIoLibIntrinsic/IoLibGcc.c | 51 ++++++++++++--
MdePkg/Library/BaseIoLibIntrinsic/IoLibMsc.c | 73 +++++++++++++++-----
2 files changed, 99 insertions(+), 25 deletions(-)
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/IoLibGcc.c b/MdePkg/Library/BaseIoLibIntrinsic/IoLibGcc.c
index 5c791289c469..05a739085967 100644
--- a/MdePkg/Library/BaseIoLibIntrinsic/IoLibGcc.c
+++ b/MdePkg/Library/BaseIoLibIntrinsic/IoLibGcc.c
@@ -16,6 +16,7 @@
**/
#include "BaseIoLibIntrinsicInternal.h"
+#include "IoLibTdx.h"
/**
Reads an 8-bit I/O port.
@@ -24,7 +25,9 @@
This function must guarantee that all I/O read and write operations are
serialized.
- If 8-bit I/O port operations are not supported, then ASSERT().
+ If 8-bit I/O port operations are not supported, then ASSERT()
+
+ For Td guest TDVMCALL_IO is invoked to read I/O port.
@param Port The I/O port to read.
@@ -42,7 +45,11 @@ IoRead8 (
Flag = FilterBeforeIoRead (FilterWidth8, Port, &Data);
if (Flag) {
- __asm__ __volatile__ ("inb %w1,%b0" : "=a" (Data) : "d" ((UINT16)Port));
+ if (IsTdxGuest ()) {
+ Data = TdIoRead8 (Port);
+ } else {
+ __asm__ __volatile__ ("inb %w1,%b0" : "=a" (Data) : "d" ((UINT16)Port));
+ }
}
FilterAfterIoRead (FilterWidth8, Port, &Data);
@@ -59,6 +66,8 @@ IoRead8 (
If 8-bit I/O port operations are not supported, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to write I/O port.
+
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@@ -76,7 +85,11 @@ IoWrite8 (
Flag = FilterBeforeIoWrite (FilterWidth8, Port, &Value);
if (Flag) {
- __asm__ __volatile__ ("outb %b0,%w1" : : "a" (Value), "d" ((UINT16)Port));
+ if (IsTdxGuest ()) {
+ TdIoWrite8 (Port, Value);
+ } else {
+ __asm__ __volatile__ ("outb %b0,%w1" : : "a" (Value), "d" ((UINT16)Port));
+ }
}
FilterAfterIoWrite (FilterWidth8, Port, &Value);
@@ -94,6 +107,8 @@ IoWrite8 (
If 16-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 16-bit boundary, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to read I/O port.
+
@param Port The I/O port to read.
@return The value read.
@@ -112,7 +127,11 @@ IoRead16 (
Flag = FilterBeforeIoRead (FilterWidth16, Port, &Data);
if (Flag) {
- __asm__ __volatile__ ("inw %w1,%w0" : "=a" (Data) : "d" ((UINT16)Port));
+ if (IsTdxGuest ()) {
+ Data = TdIoRead16 (Port);
+ } else {
+ __asm__ __volatile__ ("inw %w1,%w0" : "=a" (Data) : "d" ((UINT16)Port));
+ }
}
FilterAfterIoRead (FilterWidth16, Port, &Data);
@@ -130,6 +149,8 @@ IoRead16 (
If 16-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 16-bit boundary, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to write I/O port.
+
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@@ -149,7 +170,11 @@ IoWrite16 (
Flag = FilterBeforeIoWrite (FilterWidth16, Port, &Value);
if (Flag) {
- __asm__ __volatile__ ("outw %w0,%w1" : : "a" (Value), "d" ((UINT16)Port));
+ if (IsTdxGuest ()) {
+ TdIoWrite16 (Port, Value);
+ } else {
+ __asm__ __volatile__ ("outw %w0,%w1" : : "a" (Value), "d" ((UINT16)Port));
+ }
}
FilterAfterIoWrite (FilterWidth16, Port, &Value);
@@ -167,6 +192,8 @@ IoWrite16 (
If 32-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 32-bit boundary, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to read I/O port.
+
@param Port The I/O port to read.
@return The value read.
@@ -185,7 +212,11 @@ IoRead32 (
Flag = FilterBeforeIoRead (FilterWidth32, Port, &Data);
if (Flag) {
- __asm__ __volatile__ ("inl %w1,%0" : "=a" (Data) : "d" ((UINT16)Port));
+ if (IsTdxGuest ()) {
+ Data = TdIoRead32 (Port);
+ } else {
+ __asm__ __volatile__ ("inl %w1,%0" : "=a" (Data) : "d" ((UINT16)Port));
+ }
}
FilterAfterIoRead (FilterWidth32, Port, &Data);
@@ -203,6 +234,8 @@ IoRead32 (
If 32-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 32-bit boundary, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to write I/O port.
+
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@@ -222,7 +255,11 @@ IoWrite32 (
Flag = FilterBeforeIoWrite (FilterWidth32, Port, &Value);
if (Flag) {
- __asm__ __volatile__ ("outl %0,%w1" : : "a" (Value), "d" ((UINT16)Port));
+ if (IsTdxGuest ()) {
+ TdIoWrite32 (Port, Value);
+ } else {
+ __asm__ __volatile__ ("outl %0,%w1" : : "a" (Value), "d" ((UINT16)Port));
+ }
}
FilterAfterIoWrite (FilterWidth32, Port, &Value);
diff --git a/MdePkg/Library/BaseIoLibIntrinsic/IoLibMsc.c b/MdePkg/Library/BaseIoLibIntrinsic/IoLibMsc.c
index 9f225a6b5d39..f1b7d51a7245 100644
--- a/MdePkg/Library/BaseIoLibIntrinsic/IoLibMsc.c
+++ b/MdePkg/Library/BaseIoLibIntrinsic/IoLibMsc.c
@@ -14,6 +14,7 @@
**/
#include "BaseIoLibIntrinsicInternal.h"
+#include "IoLibTdx.h"
//
// Microsoft Visual Studio 7.1 Function Prototypes for I/O Intrinsics.
@@ -82,6 +83,8 @@ _ReadWriteBarrier (
If 8-bit I/O port operations are not supported, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to read I/O port.
+
@param Port The I/O port to read.
@return The value read.
@@ -98,9 +101,13 @@ IoRead8 (
Flag = FilterBeforeIoRead (FilterWidth8, Port, &Value);
if (Flag) {
- _ReadWriteBarrier ();
- Value = (UINT8)_inp ((UINT16)Port);
- _ReadWriteBarrier ();
+ if (IsTdxGuest ()) {
+ Value = TdIoRead8 (Port);
+ } else {
+ _ReadWriteBarrier ();
+ Value = (UINT8)_inp ((UINT16)Port);
+ _ReadWriteBarrier ();
+ }
}
FilterAfterIoRead (FilterWidth8, Port, &Value);
@@ -117,6 +124,8 @@ IoRead8 (
If 8-bit I/O port operations are not supported, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to write I/O port.
+
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@@ -134,9 +143,13 @@ IoWrite8 (
Flag = FilterBeforeIoWrite (FilterWidth8, Port, &Value);
if (Flag) {
- _ReadWriteBarrier ();
- (UINT8)_outp ((UINT16)Port, Value);
- _ReadWriteBarrier ();
+ if (IsTdxGuest ()) {
+ TdIoWrite8 (Port, Value);
+ } else {
+ _ReadWriteBarrier ();
+ (UINT8)_outp ((UINT16)Port, Value);
+ _ReadWriteBarrier ();
+ }
}
FilterAfterIoWrite (FilterWidth8, Port, &Value);
@@ -154,6 +167,8 @@ IoWrite8 (
If 16-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 16-bit boundary, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to read I/O port.
+
@param Port The I/O port to read.
@return The value read.
@@ -172,9 +187,13 @@ IoRead16 (
Flag = FilterBeforeIoRead (FilterWidth16, Port, &Value);
if (Flag) {
- _ReadWriteBarrier ();
- Value = _inpw ((UINT16)Port);
- _ReadWriteBarrier ();
+ if (IsTdxGuest ()) {
+ Value = TdIoRead16 (Port);
+ } else {
+ _ReadWriteBarrier ();
+ Value = _inpw ((UINT16)Port);
+ _ReadWriteBarrier ();
+ }
}
FilterBeforeIoRead (FilterWidth16, Port, &Value);
@@ -192,6 +211,8 @@ IoRead16 (
If 16-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 16-bit boundary, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to write I/O port.
+
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@@ -211,9 +232,13 @@ IoWrite16 (
Flag = FilterBeforeIoWrite (FilterWidth16, Port, &Value);
if (Flag) {
- _ReadWriteBarrier ();
- _outpw ((UINT16)Port, Value);
- _ReadWriteBarrier ();
+ if (IsTdxGuest ()) {
+ TdIoWrite16 (Port, Value);
+ } else {
+ _ReadWriteBarrier ();
+ _outpw ((UINT16)Port, Value);
+ _ReadWriteBarrier ();
+ }
}
FilterAfterIoWrite (FilterWidth16, Port, &Value);
@@ -231,6 +256,8 @@ IoWrite16 (
If 32-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 32-bit boundary, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to read I/O port.
+
@param Port The I/O port to read.
@return The value read.
@@ -249,9 +276,13 @@ IoRead32 (
Flag = FilterBeforeIoRead (FilterWidth32, Port, &Value);
if (Flag) {
- _ReadWriteBarrier ();
- Value = _inpd ((UINT16)Port);
- _ReadWriteBarrier ();
+ if (IsTdxGuest ()) {
+ Value = TdIoRead32 (Port);
+ } else {
+ _ReadWriteBarrier ();
+ Value = _inpd ((UINT16)Port);
+ _ReadWriteBarrier ();
+ }
}
FilterAfterIoRead (FilterWidth32, Port, &Value);
@@ -269,6 +300,8 @@ IoRead32 (
If 32-bit I/O port operations are not supported, then ASSERT().
If Port is not aligned on a 32-bit boundary, then ASSERT().
+ For Td guest TDVMCALL_IO is invoked to write I/O port.
+
@param Port The I/O port to write.
@param Value The value to write to the I/O port.
@@ -288,9 +321,13 @@ IoWrite32 (
Flag = FilterBeforeIoWrite (FilterWidth32, Port, &Value);
if (Flag) {
- _ReadWriteBarrier ();
- _outpd ((UINT16)Port, Value);
- _ReadWriteBarrier ();
+ if (IsTdxGuest ()) {
+ TdIoWrite32 (Port, Value);
+ } else {
+ _ReadWriteBarrier ();
+ _outpd ((UINT16)Port, Value);
+ _ReadWriteBarrier ();
+ }
}
FilterAfterIoWrite (FilterWidth32, Port, &Value);
--
2.29.2.windows.2
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