From: Glauber de Oliveira Costa <gcosta@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: akpm@linux-foundation.org, glommer@gmail.com, tglx@linutronix.de,
mingo@elte.hu, ehabkost@redhat.com, jeremy@goop.org,
avi@qumranet.com, anthony@codemonkey.ws,
virtualization@lists.linux-foundation.org, rusty@rustcorp.com.au,
ak@suse.de, chrisw@sous-sol.org, rostedt@goodmis.org,
hpa@zytor.com, zach@vmware.com, roland@redhat.com,
Glauber de Oliveira Costa <gcosta@redhat.com>
Subject: [PATCH 09/15] adds paravirt hook for swapgs
Date: Thu, 20 Dec 2007 18:04:04 -0200 [thread overview]
Message-ID: <11981813192341-git-send-email-gcosta@redhat.com> (raw)
In-Reply-To: <1198181309285-git-send-email-gcosta@redhat.com>
This patch adds paravirt hook for swapgs operation, which is a privileged
operation in x86_64.
Signed-off-by: Glauber de Oliveira Costa <gcosta@redhat.com>
---
arch/x86/kernel/paravirt.c | 1 +
include/asm-x86/paravirt.h | 9 +++++++++
include/asm-x86/processor.h | 8 ++++++++
3 files changed, 18 insertions(+), 0 deletions(-)
Index: linux-2.6-x86/arch/x86/kernel/paravirt.c
===================================================================
--- linux-2.6-x86.orig/arch/x86/kernel/paravirt.c 2007-12-20 19:07:22.000000000 -0800
+++ linux-2.6-x86/arch/x86/kernel/paravirt.c 2007-12-20 19:08:06.000000000 -0800
@@ -390,6 +390,7 @@
.irq_enable_syscall_ret = native_irq_enable_syscall_ret,
.iret = native_iret,
+ .swapgs = native_swapgs,
.set_iopl_mask = native_set_iopl_mask,
.io_delay = native_io_delay,
Index: linux-2.6-x86/include/asm-x86/paravirt.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/paravirt.h 2007-12-20 19:07:29.000000000 -0800
+++ linux-2.6-x86/include/asm-x86/paravirt.h 2007-12-20 19:08:06.000000000 -0800
@@ -127,6 +127,8 @@
void (*irq_enable_syscall_ret)(void);
void (*iret)(void);
+ void (*swapgs)(void);
+
struct pv_lazy_ops lazy_mode;
};
@@ -1228,6 +1230,13 @@
call *pv_cpu_ops+PV_CPU_read_cr0; \
pop %edx; pop %ecx
#else
+#define SWAPGS \
+ PARA_SITE(PARA_PATCH(pv_cpu_ops, PV_CPU_swapgs), CLBR_NONE, \
+ PV_SAVE_REGS \
+ call *pv_cpu_ops+PV_CPU_swapgs; \
+ PV_RESTORE_REGS \
+ )
+
#define GET_CR2_INTO_RCX \
call *pv_mmu_ops+PV_MMU_read_cr2; \
movq %rax, %rcx; \
Index: linux-2.6-x86/include/asm-x86/processor.h
===================================================================
--- linux-2.6-x86.orig/include/asm-x86/processor.h 2007-12-20 19:06:59.000000000 -0800
+++ linux-2.6-x86/include/asm-x86/processor.h 2007-12-20 19:08:06.000000000 -0800
@@ -435,6 +435,13 @@
#endif
}
+static inline void native_swapgs(void)
+{
+#ifdef CONFIG_X86_64
+ asm volatile("swapgs" ::: "memory");
+#endif
+}
+
#ifdef CONFIG_PARAVIRT
#include <asm/paravirt.h>
#else
@@ -456,6 +463,7 @@
}
#define set_iopl_mask native_set_iopl_mask
+#define SWAPGS swapgs
#endif /* CONFIG_PARAVIRT */
/*
next prev parent reply other threads:[~2007-12-20 20:11 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-12-20 20:03 [PATCH 0/15] adjust pvops to accomodate its x86_64 variant Glauber de Oliveira Costa
2007-12-20 20:03 ` [PATCH 01/15] change paravirt_32.c name Glauber de Oliveira Costa
2007-12-20 20:03 ` [PATCH 02/15] adjust PVOP_CALL/VCALL macros for x86_64 Glauber de Oliveira Costa
2007-12-20 20:03 ` [PATCH 03/15] cleanup write_tsc Glauber de Oliveira Costa
2007-12-20 20:03 ` [PATCH 04/15] provide paravirtualized hook for rdtscp Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 05/15] change assembly definition of paravirt_patch_site Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 06/15] adjust assembly macros to x86_64 as well Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 07/15] change irq functions to accomodate x86_64 Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 08/15] add macro for privileged x86_64 operation Glauber de Oliveira Costa
2007-12-20 20:04 ` Glauber de Oliveira Costa [this message]
2007-12-20 20:04 ` [PATCH 10/15] replace privileged instructions with paravirt macros Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 11/15] cleanup CLI_STRING, STI_STRING and friends Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 12/15] add CLBR_ defines for x86_64 Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 13/15] move patching code to arch-specific file Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 14/15] x86_64 patching functions Glauber de Oliveira Costa
2007-12-20 20:04 ` [PATCH 15/15] replace x86_read/write_per_cpu with a common function Glauber de Oliveira Costa
2007-12-20 21:16 ` H. Peter Anvin
2007-12-20 20:31 ` [PATCH 13/15] move patching code to arch-specific file Ingo Molnar
2007-12-20 20:33 ` Ingo Molnar
2007-12-20 21:22 ` Glauber de Oliveira Costa
2007-12-20 21:26 ` Ingo Molnar
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