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authorBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-02-04 00:57:22 +0300
committerBoris Ostrovsky <boris.ostrovsky@oracle.com>2017-02-07 16:07:01 +0300
commit063334f30543597430f172bd7690d21e3590e148 (patch)
tree66ecb71e2297708467e28ab41ee7f6765add8e60 /arch/x86/xen/xen-head.S
parent5a7670ee23f2c07a639c263b70140eaf1da9f68f (diff)
downloadlinux-063334f30543597430f172bd7690d21e3590e148.tar.xz
xen/x86: Remove PVH support
We are replacing existing PVH guests with new implementation. We are keeping xen_pvh_domain() macro (for now set to zero) because when we introduce new PVH implementation later in this series we will reuse current PVH-specific code (xen_pvh_gnttab_setup()), and that code is conditioned by 'if (xen_pvh_domain())'. (We will also need a noop xen_pvh_domain() for !CONFIG_XEN_PVH). Signed-off-by: Boris Ostrovsky <boris.ostrovsky@oracle.com> Reviewed-by: Juergen Gross <jgross@suse.com> Reviewed-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Diffstat (limited to 'arch/x86/xen/xen-head.S')
-rw-r--r--arch/x86/xen/xen-head.S62
1 files changed, 4 insertions, 58 deletions
diff --git a/arch/x86/xen/xen-head.S b/arch/x86/xen/xen-head.S
index 7f8d8abf4c1a..37794e42b67d 100644
--- a/arch/x86/xen/xen-head.S
+++ b/arch/x86/xen/xen-head.S
@@ -16,25 +16,6 @@
#include <xen/interface/xen-mca.h>
#include <asm/xen/interface.h>
-#ifdef CONFIG_XEN_PVH
-#define PVH_FEATURES_STR "|writable_descriptor_tables|auto_translated_physmap|supervisor_mode_kernel"
-/* Note the lack of 'hvm_callback_vector'. Older hypervisor will
- * balk at this being part of XEN_ELFNOTE_FEATURES, so we put it in
- * XEN_ELFNOTE_SUPPORTED_FEATURES which older hypervisors will ignore.
- */
-#define PVH_FEATURES ((1 << XENFEAT_writable_page_tables) | \
- (1 << XENFEAT_auto_translated_physmap) | \
- (1 << XENFEAT_supervisor_mode_kernel) | \
- (1 << XENFEAT_hvm_callback_vector))
-/* The XENFEAT_writable_page_tables is not stricly necessary as we set that
- * up regardless whether this CONFIG option is enabled or not, but it
- * clarifies what the right flags need to be.
- */
-#else
-#define PVH_FEATURES_STR ""
-#define PVH_FEATURES (0)
-#endif
-
__INIT
ENTRY(startup_xen)
cld
@@ -54,41 +35,6 @@ ENTRY(startup_xen)
__FINIT
-#ifdef CONFIG_XEN_PVH
-/*
- * xen_pvh_early_cpu_init() - early PVH VCPU initialization
- * @cpu: this cpu number (%rdi)
- * @entry: true if this is a secondary vcpu coming up on this entry
- * point, false if this is the boot CPU being initialized for
- * the first time (%rsi)
- *
- * Note: This is called as a function on the boot CPU, and is the entry point
- * on the secondary CPU.
- */
-ENTRY(xen_pvh_early_cpu_init)
- mov %rsi, %r11
-
- /* Gather features to see if NX implemented. */
- mov $0x80000001, %eax
- cpuid
- mov %edx, %esi
-
- mov $MSR_EFER, %ecx
- rdmsr
- bts $_EFER_SCE, %eax
-
- bt $20, %esi
- jnc 1f /* No NX, skip setting it */
- bts $_EFER_NX, %eax
-1: wrmsr
-#ifdef CONFIG_SMP
- cmp $0, %r11b
- jne cpu_bringup_and_idle
-#endif
- ret
-
-#endif /* CONFIG_XEN_PVH */
-
.pushsection .text
.balign PAGE_SIZE
ENTRY(hypercall_page)
@@ -114,10 +60,10 @@ ENTRY(hypercall_page)
#endif
ELFNOTE(Xen, XEN_ELFNOTE_ENTRY, _ASM_PTR startup_xen)
ELFNOTE(Xen, XEN_ELFNOTE_HYPERCALL_PAGE, _ASM_PTR hypercall_page)
- ELFNOTE(Xen, XEN_ELFNOTE_FEATURES, .ascii "!writable_page_tables|pae_pgdir_above_4gb"; .asciz PVH_FEATURES_STR)
- ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES, .long (PVH_FEATURES) |
- (1 << XENFEAT_writable_page_tables) |
- (1 << XENFEAT_dom0))
+ ELFNOTE(Xen, XEN_ELFNOTE_FEATURES,
+ .ascii "!writable_page_tables|pae_pgdir_above_4gb")
+ ELFNOTE(Xen, XEN_ELFNOTE_SUPPORTED_FEATURES,
+ .long (1 << XENFEAT_writable_page_tables) | (1 << XENFEAT_dom0))
ELFNOTE(Xen, XEN_ELFNOTE_PAE_MODE, .asciz "yes")
ELFNOTE(Xen, XEN_ELFNOTE_LOADER, .asciz "generic")
ELFNOTE(Xen, XEN_ELFNOTE_L1_MFN_VALID,