From: Avi Kivity <avi@redhat.com>
To: linux-kernel@vger.kernel.org
Cc: kvm@vger.kernel.org, Avi Kivity <avi@qumranet.com>
Subject: [PATCH 17/40] KVM: VMX: Unify register save/restore across 32 and 64 bit hosts
Date: Tue, 23 Sep 2008 16:46:31 +0300 [thread overview]
Message-ID: <1222177614-26669-18-git-send-email-avi@redhat.com> (raw)
In-Reply-To: <1222177614-26669-1-git-send-email-avi@redhat.com>
From: Avi Kivity <avi@qumranet.com>
Signed-off-by: Avi Kivity <avi@qumranet.com>
---
arch/x86/kvm/vmx.c | 90 +++++++++++++++++++++-------------------------------
1 files changed, 36 insertions(+), 54 deletions(-)
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 2879880..fc8996b 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -2955,6 +2955,14 @@ static void fixup_rmode_irq(struct vcpu_vmx *vmx)
| vmx->rmode.irq.vector;
}
+#ifdef CONFIG_X86_64
+#define R "r"
+#define Q "q"
+#else
+#define R "e"
+#define Q "l"
+#endif
+
static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
@@ -2972,26 +2980,21 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
asm(
/* Store host registers */
-#ifdef CONFIG_X86_64
- "push %%rdx; push %%rbp;"
- "push %%rcx \n\t"
-#else
- "push %%edx; push %%ebp;"
- "push %%ecx \n\t"
-#endif
+ "push %%"R"dx; push %%"R"bp;"
+ "push %%"R"cx \n\t"
__ex(ASM_VMX_VMWRITE_RSP_RDX) "\n\t"
/* Check if vmlaunch of vmresume is needed */
"cmpl $0, %c[launched](%0) \n\t"
/* Load guest registers. Don't clobber flags. */
+ "mov %c[cr2](%0), %%"R"ax \n\t"
+ "mov %%"R"ax, %%cr2 \n\t"
+ "mov %c[rax](%0), %%"R"ax \n\t"
+ "mov %c[rbx](%0), %%"R"bx \n\t"
+ "mov %c[rdx](%0), %%"R"dx \n\t"
+ "mov %c[rsi](%0), %%"R"si \n\t"
+ "mov %c[rdi](%0), %%"R"di \n\t"
+ "mov %c[rbp](%0), %%"R"bp \n\t"
#ifdef CONFIG_X86_64
- "mov %c[cr2](%0), %%rax \n\t"
- "mov %%rax, %%cr2 \n\t"
- "mov %c[rax](%0), %%rax \n\t"
- "mov %c[rbx](%0), %%rbx \n\t"
- "mov %c[rdx](%0), %%rdx \n\t"
- "mov %c[rsi](%0), %%rsi \n\t"
- "mov %c[rdi](%0), %%rdi \n\t"
- "mov %c[rbp](%0), %%rbp \n\t"
"mov %c[r8](%0), %%r8 \n\t"
"mov %c[r9](%0), %%r9 \n\t"
"mov %c[r10](%0), %%r10 \n\t"
@@ -3000,18 +3003,9 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
"mov %c[r13](%0), %%r13 \n\t"
"mov %c[r14](%0), %%r14 \n\t"
"mov %c[r15](%0), %%r15 \n\t"
- "mov %c[rcx](%0), %%rcx \n\t" /* kills %0 (rcx) */
-#else
- "mov %c[cr2](%0), %%eax \n\t"
- "mov %%eax, %%cr2 \n\t"
- "mov %c[rax](%0), %%eax \n\t"
- "mov %c[rbx](%0), %%ebx \n\t"
- "mov %c[rdx](%0), %%edx \n\t"
- "mov %c[rsi](%0), %%esi \n\t"
- "mov %c[rdi](%0), %%edi \n\t"
- "mov %c[rbp](%0), %%ebp \n\t"
- "mov %c[rcx](%0), %%ecx \n\t" /* kills %0 (ecx) */
#endif
+ "mov %c[rcx](%0), %%"R"cx \n\t" /* kills %0 (ecx) */
+
/* Enter guest mode */
"jne .Llaunched \n\t"
__ex(ASM_VMX_VMLAUNCH) "\n\t"
@@ -3019,15 +3013,15 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
".Llaunched: " __ex(ASM_VMX_VMRESUME) "\n\t"
".Lkvm_vmx_return: "
/* Save guest registers, load host registers, keep flags */
+ "xchg %0, (%%"R"sp) \n\t"
+ "mov %%"R"ax, %c[rax](%0) \n\t"
+ "mov %%"R"bx, %c[rbx](%0) \n\t"
+ "push"Q" (%%"R"sp); pop"Q" %c[rcx](%0) \n\t"
+ "mov %%"R"dx, %c[rdx](%0) \n\t"
+ "mov %%"R"si, %c[rsi](%0) \n\t"
+ "mov %%"R"di, %c[rdi](%0) \n\t"
+ "mov %%"R"bp, %c[rbp](%0) \n\t"
#ifdef CONFIG_X86_64
- "xchg %0, (%%rsp) \n\t"
- "mov %%rax, %c[rax](%0) \n\t"
- "mov %%rbx, %c[rbx](%0) \n\t"
- "pushq (%%rsp); popq %c[rcx](%0) \n\t"
- "mov %%rdx, %c[rdx](%0) \n\t"
- "mov %%rsi, %c[rsi](%0) \n\t"
- "mov %%rdi, %c[rdi](%0) \n\t"
- "mov %%rbp, %c[rbp](%0) \n\t"
"mov %%r8, %c[r8](%0) \n\t"
"mov %%r9, %c[r9](%0) \n\t"
"mov %%r10, %c[r10](%0) \n\t"
@@ -3036,24 +3030,11 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
"mov %%r13, %c[r13](%0) \n\t"
"mov %%r14, %c[r14](%0) \n\t"
"mov %%r15, %c[r15](%0) \n\t"
- "mov %%cr2, %%rax \n\t"
- "mov %%rax, %c[cr2](%0) \n\t"
-
- "pop %%rbp; pop %%rbp; pop %%rdx \n\t"
-#else
- "xchg %0, (%%esp) \n\t"
- "mov %%eax, %c[rax](%0) \n\t"
- "mov %%ebx, %c[rbx](%0) \n\t"
- "pushl (%%esp); popl %c[rcx](%0) \n\t"
- "mov %%edx, %c[rdx](%0) \n\t"
- "mov %%esi, %c[rsi](%0) \n\t"
- "mov %%edi, %c[rdi](%0) \n\t"
- "mov %%ebp, %c[rbp](%0) \n\t"
- "mov %%cr2, %%eax \n\t"
- "mov %%eax, %c[cr2](%0) \n\t"
-
- "pop %%ebp; pop %%ebp; pop %%edx \n\t"
#endif
+ "mov %%cr2, %%"R"ax \n\t"
+ "mov %%"R"ax, %c[cr2](%0) \n\t"
+
+ "pop %%"R"bp; pop %%"R"bp; pop %%"R"dx \n\t"
"setbe %c[fail](%0) \n\t"
: : "c"(vmx), "d"((unsigned long)HOST_RSP),
[launched]"i"(offsetof(struct vcpu_vmx, launched)),
@@ -3077,11 +3058,9 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
#endif
[cr2]"i"(offsetof(struct vcpu_vmx, vcpu.arch.cr2))
: "cc", "memory"
+ , R"bx", R"di", R"si"
#ifdef CONFIG_X86_64
- , "rbx", "rdi", "rsi"
, "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15"
-#else
- , "ebx", "edi", "rsi"
#endif
);
@@ -3111,6 +3090,9 @@ static void vmx_vcpu_run(struct kvm_vcpu *vcpu, struct kvm_run *kvm_run)
vmx_complete_interrupts(vmx);
}
+#undef R
+#undef Q
+
static void vmx_free_vmcs(struct kvm_vcpu *vcpu)
{
struct vcpu_vmx *vmx = to_vmx(vcpu);
--
1.6.0.1
next prev parent reply other threads:[~2008-09-23 13:47 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-23 13:46 [PATCH 00/40] KVM Updates for 2.6.28 merge window (part 1 of 3) Avi Kivity
2008-09-23 13:46 ` [PATCH 01/40] KVM: VMX: Rename misnamed msr bits Avi Kivity
2008-09-23 13:46 ` [PATCH 02/40] KVM: x86: accessors for guest registers Avi Kivity
2008-09-23 13:46 ` [PATCH 03/40] KVM: Move KVM TRACE DEFINITIONS to common header Avi Kivity
2008-09-23 13:46 ` [PATCH 04/40] KVM: Introduce kvm_set_irq to inject interrupts in guests Avi Kivity
2008-09-23 13:46 ` [PATCH 05/40] KVM: MMU: Separate the code for unlinking a shadow page from its parents Avi Kivity
2008-09-23 13:46 ` [PATCH 06/40] KVM: MMU: Simplify kvm_mmu_zap_page() Avi Kivity
2008-09-23 13:46 ` [PATCH 07/40] KVM: Move NMI IRET fault processing to new vmx_complete_interrupts() Avi Kivity
2008-09-23 13:46 ` [PATCH 08/40] KVM: VMX: Move nmi injection failure processing to vm exit path Avi Kivity
2008-09-23 13:46 ` [PATCH 09/40] KVM: Clear exception queue before emulating an instruction Avi Kivity
2008-09-23 13:46 ` [PATCH 10/40] KVM: VMX: Fix pending exception processing Avi Kivity
2008-09-23 13:46 ` [PATCH 11/40] KVM: Add a pending interrupt queue Avi Kivity
2008-09-23 13:46 ` [PATCH 12/40] KVM: VMX: Move interrupt post-processing to vmx_complete_interrupts() Avi Kivity
2008-09-23 13:46 ` [PATCH 13/40] KVM: VMX: Remove redundant check in handle_rmode_exception Avi Kivity
2008-09-23 13:46 ` [PATCH 14/40] KVM: Consolidate PIC isr clearing into a function Avi Kivity
2008-09-23 13:46 ` [PATCH 15/40] KVM: Consolidate XX_VECTOR defines Avi Kivity
2008-09-23 13:46 ` [PATCH 16/40] KVM: VMX: Reinject real mode exception Avi Kivity
2008-09-23 13:46 ` Avi Kivity [this message]
2008-09-23 13:46 ` [PATCH 18/40] KVM: SVM: Unify register save/restore across 32 and 64 bit hosts Avi Kivity
2008-09-23 13:46 ` [PATCH 19/40] KVM: kvmtrace: Remove use of bit fields in kvm trace structure Avi Kivity
2008-09-23 13:46 ` [PATCH 20/40] KVM: kvmtrace: replace get_cycles with ktime_get v3 Avi Kivity
2008-09-23 13:46 ` [PATCH 21/40] KVM: ppc: enable KVM_TRACE building for powerpc Avi Kivity
2008-09-23 13:46 ` [PATCH 22/40] KVM: ppc: adds trace points for ppc tlb activity Avi Kivity
2008-09-23 13:46 ` [PATCH 23/40] KVM: ppc: trace powerpc instruction emulation Avi Kivity
2008-09-23 13:46 ` [PATCH 24/40] KVM: VMX: Avoid vmwrite(HOST_RSP) when possible Avi Kivity
2008-09-23 13:46 ` [PATCH 25/40] KVM: Ignore DEBUGCTL MSRs with no effect Avi Kivity
2008-09-23 13:46 ` [PATCH 26/40] KVM: ppc: guest breakpoint support Avi Kivity
2008-09-23 13:46 ` [PATCH 27/40] KVM: ppc: Stop saving host TLB state Avi Kivity
2008-09-23 13:46 ` [PATCH 28/40] KVM: ppc: Write only modified shadow entries into the TLB on exit Avi Kivity
2008-09-23 13:46 ` [PATCH 29/40] KVM: powerpc: Map guest userspace with TID=0 mappings Avi Kivity
2008-09-23 13:46 ` [PATCH 30/40] KVM: Add irq ack notifier list Avi Kivity
2008-09-23 13:46 ` [PATCH 31/40] KVM: irq ack notification Avi Kivity
2008-09-23 13:46 ` [PATCH 32/40] KVM: PIT: fix injection logic and count Avi Kivity
2008-09-23 13:46 ` [PATCH 33/40] x86: paravirt: factor out cpu_khz to common code Avi Kivity
2008-09-23 13:46 ` [PATCH 34/40] x86: KVM guest: use paravirt function to calculate cpu khz Avi Kivity
2008-09-23 13:46 ` [PATCH 35/40] KVM: direct mmio pfn check Avi Kivity
2008-09-23 13:46 ` [PATCH 36/40] KVM: pci device assignment Avi Kivity
2008-09-23 13:46 ` [PATCH 37/40] KVM: Reduce kvm stack usage in kvm_arch_vm_ioctl() Avi Kivity
2008-09-23 13:46 ` [PATCH 38/40] KVM: Reduce stack usage in kvm_vcpu_ioctl() Avi Kivity
2008-09-23 13:46 ` [PATCH 39/40] KVM: Reduce stack usage in kvm_arch_vcpu_ioctl() Avi Kivity
2008-09-23 13:46 ` [PATCH 40/40] KVM: Reduce stack usage in kvm_pv_mmu_op() Avi Kivity
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