diff mbox series

[2.5/3] x86/svm: Reimplement VMRUN/STGI/CLGI with new asm-defns.h infrastructure

Message ID 20210129104540.32137-1-andrew.cooper3@citrix.com (mailing list archive)
State New
Headers show
Series x86: Initial Trenchboot/SKINIT support | expand

Commit Message

Andrew Cooper Jan. 29, 2021, 10:45 a.m. UTC 
... in order to reuse stgi elsewhere.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
---
CC: Jan Beulich <JBeulich@suse.com>
CC: Roger Pau Monné <roger.pau@citrix.com>
CC: Wei Liu <wl@xen.org>
---
 xen/arch/x86/hvm/svm/entry.S    | 10 +++-------
 xen/include/asm-x86/asm-defns.h | 12 ++++++++++++
 2 files changed, 15 insertions(+), 7 deletions(-)

Comments

Jan Beulich Jan. 29, 2021, 11:13 a.m. UTC | #1 
On 29.01.2021 11:45, Andrew Cooper wrote:
> ... in order to reuse stgi elsewhere.
> 
> Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>

Reviewed-by: Jan Beulich <jbeulich@suse.com>
diff mbox series

Patch

diff --git a/xen/arch/x86/hvm/svm/entry.S b/xen/arch/x86/hvm/svm/entry.S
index 1d2df08e89..e208a4b32a 100644
--- a/xen/arch/x86/hvm/svm/entry.S
+++ b/xen/arch/x86/hvm/svm/entry.S
@@ -22,10 +22,6 @@ 
 #include <asm/asm_defns.h>
 #include <asm/page.h>
 
-#define VMRUN  .byte 0x0F,0x01,0xD8
-#define STGI   .byte 0x0F,0x01,0xDC
-#define CLGI   .byte 0x0F,0x01,0xDD
-
 ENTRY(svm_asm_do_resume)
         GET_CURRENT(bx)
 .Lsvm_do_resume:
@@ -82,9 +78,9 @@  __UNLIKELY_END(nsvm_hap)
         pop  %rsi
         pop  %rdi
 
-        CLGI
+        clgi
         sti
-        VMRUN
+        vmrun
 
         SAVE_ALL
 
@@ -93,7 +89,7 @@  __UNLIKELY_END(nsvm_hap)
         SPEC_CTRL_ENTRY_FROM_HVM    /* Req: b=curr %rsp=regs/cpuinfo, Clob: acd */
         /* WARNING! `ret`, `call *`, `jmp *` not safe before this point. */
 
-        STGI
+        stgi
 GLOBAL(svm_stgi_label)
         mov  %rsp,%rdi
         call svm_vmexit_handler
diff --git a/xen/include/asm-x86/asm-defns.h b/xen/include/asm-x86/asm-defns.h
index 43f4868d40..2e3ec0ac01 100644
--- a/xen/include/asm-x86/asm-defns.h
+++ b/xen/include/asm-x86/asm-defns.h
@@ -8,6 +8,18 @@ 
 .endm
 #endif
 
+.macro vmrun
+    .byte 0x0f, 0x01, 0xd8
+.endm
+
+.macro stgi
+    .byte 0x0f, 0x01, 0xdc
+.endm
+
+.macro clgi
+    .byte 0x0f, 0x01, 0xdd
+.endm
+
 .macro INDIRECT_BRANCH insn:req arg:req
 /*
  * Create an indirect branch.  insn is one of call/jmp, arg is a single