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Message-Id: <20230322200121.1997157-4-sashal@kernel.org>
Date: Wed, 22 Mar 2023 16:01:08 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc: Jan Beulich <jbeulich@...e.com>, Juergen Gross <jgross@...e.com>,
Sasha Levin <sashal@...nel.org>, tglx@...utronix.de,
mingo@...hat.com, bp@...en8.de, dave.hansen@...ux.intel.com,
x86@...nel.org, sstabellini@...nel.org,
xen-devel@...ts.xenproject.org
Subject: [PATCH AUTOSEL 5.15 04/16] x86/PVH: obtain VGA console info in Dom0
From: Jan Beulich <jbeulich@...e.com>
[ Upstream commit 934ef33ee75c3846f605f18b65048acd147e3918 ]
A new platform-op was added to Xen to allow obtaining the same VGA
console information PV Dom0 is handed. Invoke the new function and have
the output data processed by xen_init_vga().
Signed-off-by: Jan Beulich <jbeulich@...e.com>
Reviewed-by: Juergen Gross <jgross@...e.com>
Link: https://lore.kernel.org/r/8f315e92-7bda-c124-71cc-478ab9c5e610@suse.com
Signed-off-by: Juergen Gross <jgross@...e.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
arch/x86/xen/Makefile | 2 +-
arch/x86/xen/enlighten_pv.c | 3 ++-
arch/x86/xen/enlighten_pvh.c | 13 +++++++++++++
arch/x86/xen/vga.c | 5 ++---
arch/x86/xen/xen-ops.h | 7 ++++---
include/xen/interface/platform.h | 3 +++
6 files changed, 25 insertions(+), 8 deletions(-)
diff --git a/arch/x86/xen/Makefile b/arch/x86/xen/Makefile
index 4953260e281c3..40b5779fce21c 100644
--- a/arch/x86/xen/Makefile
+++ b/arch/x86/xen/Makefile
@@ -45,7 +45,7 @@ obj-$(CONFIG_PARAVIRT_SPINLOCKS)+= spinlock.o
obj-$(CONFIG_XEN_DEBUG_FS) += debugfs.o
-obj-$(CONFIG_XEN_PV_DOM0) += vga.o
+obj-$(CONFIG_XEN_DOM0) += vga.o
obj-$(CONFIG_SWIOTLB_XEN) += pci-swiotlb-xen.o
diff --git a/arch/x86/xen/enlighten_pv.c b/arch/x86/xen/enlighten_pv.c
index 561aad13412f9..998db0257e2ad 100644
--- a/arch/x86/xen/enlighten_pv.c
+++ b/arch/x86/xen/enlighten_pv.c
@@ -1353,7 +1353,8 @@ asmlinkage __visible void __init xen_start_kernel(void)
x86_platform.set_legacy_features =
xen_dom0_set_legacy_features;
- xen_init_vga(info, xen_start_info->console.dom0.info_size);
+ xen_init_vga(info, xen_start_info->console.dom0.info_size,
+ &boot_params.screen_info);
xen_start_info->console.domU.mfn = 0;
xen_start_info->console.domU.evtchn = 0;
diff --git a/arch/x86/xen/enlighten_pvh.c b/arch/x86/xen/enlighten_pvh.c
index bcae606bbc5cf..1da44aca896c6 100644
--- a/arch/x86/xen/enlighten_pvh.c
+++ b/arch/x86/xen/enlighten_pvh.c
@@ -43,6 +43,19 @@ void __init xen_pvh_init(struct boot_params *boot_params)
x86_init.oem.banner = xen_banner;
xen_efi_init(boot_params);
+
+ if (xen_initial_domain()) {
+ struct xen_platform_op op = {
+ .cmd = XENPF_get_dom0_console,
+ };
+ long ret = HYPERVISOR_platform_op(&op);
+
+ if (ret > 0)
+ xen_init_vga(&op.u.dom0_console,
+ min(ret * sizeof(char),
+ sizeof(op.u.dom0_console)),
+ &boot_params->screen_info);
+ }
}
void __init mem_map_via_hcall(struct boot_params *boot_params_p)
diff --git a/arch/x86/xen/vga.c b/arch/x86/xen/vga.c
index e336f223f7f47..93697109592c3 100644
--- a/arch/x86/xen/vga.c
+++ b/arch/x86/xen/vga.c
@@ -9,10 +9,9 @@
#include "xen-ops.h"
-void __init xen_init_vga(const struct dom0_vga_console_info *info, size_t size)
+void __init xen_init_vga(const struct dom0_vga_console_info *info, size_t size,
+ struct screen_info *screen_info)
{
- struct screen_info *screen_info = &boot_params.screen_info;
-
/* This is drawn from a dump from vgacon:startup in
* standard Linux. */
screen_info->orig_video_mode = 3;
diff --git a/arch/x86/xen/xen-ops.h b/arch/x86/xen/xen-ops.h
index 16aed4b121297..71f31032c635f 100644
--- a/arch/x86/xen/xen-ops.h
+++ b/arch/x86/xen/xen-ops.h
@@ -110,11 +110,12 @@ static inline void xen_uninit_lock_cpu(int cpu)
struct dom0_vga_console_info;
-#ifdef CONFIG_XEN_PV_DOM0
-void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size);
+#ifdef CONFIG_XEN_DOM0
+void __init xen_init_vga(const struct dom0_vga_console_info *, size_t size,
+ struct screen_info *);
#else
static inline void __init xen_init_vga(const struct dom0_vga_console_info *info,
- size_t size)
+ size_t size, struct screen_info *si)
{
}
#endif
diff --git a/include/xen/interface/platform.h b/include/xen/interface/platform.h
index 732efb08c3e17..744bc41355678 100644
--- a/include/xen/interface/platform.h
+++ b/include/xen/interface/platform.h
@@ -500,6 +500,8 @@ struct xenpf_symdata {
};
DEFINE_GUEST_HANDLE_STRUCT(xenpf_symdata);
+#define XENPF_get_dom0_console 64
+
struct xen_platform_op {
uint32_t cmd;
uint32_t interface_version; /* XENPF_INTERFACE_VERSION */
@@ -523,6 +525,7 @@ struct xen_platform_op {
struct xenpf_mem_hotadd mem_add;
struct xenpf_core_parking core_parking;
struct xenpf_symdata symdata;
+ struct dom0_vga_console_info dom0_console;
uint8_t pad[128];
} u;
};
--
2.39.2
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