[PATCH 16/23] Make head_64.S aware of KVM real mode code
We need to run some KVM trampoline code in real mode. Unfortunately, real mode only covers 8MB on Cell so we need to squeeze ourselves as low as possible. Also, we need to trap interrupts to get us back from guest state to host state without telling Linux about it. This patch adds interrupt traps and includes the KVM code that requires real mode in the real mode parts of Linux. Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/exception.h |2 ++ arch/powerpc/kernel/exceptions-64s.S |8 arch/powerpc/kernel/head_64.S|6 ++ 3 files changed, 16 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/exception.h b/arch/powerpc/include/asm/exception.h index d3d4534..54dc66f 100644 --- a/arch/powerpc/include/asm/exception.h +++ b/arch/powerpc/include/asm/exception.h @@ -144,6 +144,7 @@ .globl label##_pSeries; \ label##_pSeries: \ HMT_MEDIUM; \ + DO_KVM n; \ mtspr SPRN_SPRG1,r13; /* save r13 */ \ EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common) @@ -167,6 +168,7 @@ label##_pSeries:\ .globl label##_pSeries; \ label##_pSeries: \ HMT_MEDIUM; \ + DO_KVM n; \ mtspr SPRN_SPRG1,r13; /* save r13 */ \ mfspr r13,SPRN_SPRG3; /* get paca address into r13 */ \ std r9,PACA_EXGEN+EX_R9(r13); /* save r9, r10 */ \ diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index eb89811..d85f301 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -51,6 +51,7 @@ __start_interrupts: . = 0x200 _machine_check_pSeries: HMT_MEDIUM + DO_KVM 0x200 mtspr SPRN_SPRG1,r13 /* save r13 */ EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common) @@ -58,6 +59,7 @@ _machine_check_pSeries: .globl data_access_pSeries data_access_pSeries: HMT_MEDIUM + DO_KVM 0x300 mtspr SPRN_SPRG1,r13 BEGIN_FTR_SECTION mtspr SPRN_SPRG2,r12 @@ -77,6 +79,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_SLB) .globl data_access_slb_pSeries data_access_slb_pSeries: HMT_MEDIUM + DO_KVM 0x380 mtspr SPRN_SPRG1,r13 mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ std r3,PACA_EXSLB+EX_R3(r13) @@ -115,6 +118,7 @@ data_access_slb_pSeries: .globl instruction_access_slb_pSeries instruction_access_slb_pSeries: HMT_MEDIUM + DO_KVM 0x480 mtspr SPRN_SPRG1,r13 mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ std r3,PACA_EXSLB+EX_R3(r13) @@ -154,6 +158,7 @@ instruction_access_slb_pSeries: .globl system_call_pSeries system_call_pSeries: HMT_MEDIUM + DO_KVM 0xc00 BEGIN_FTR_SECTION cmpdi r0,0x1ebe beq-1f @@ -186,12 +191,15 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) * trickery is thus necessary */ . = 0xf00 + DO_KVM 0xf00 b performance_monitor_pSeries . = 0xf20 + DO_KVM 0xf20 b altivec_unavailable_pSeries . = 0xf40 + DO_KVM 0xf40 b vsx_unavailable_pSeries #ifdef CONFIG_CBE_RAS diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 012505e..e409418 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -38,6 +38,7 @@ #include #include #include +#include /* The physical memory is layed out such that the secondary processor * spin code sits at 0x...0x00ff. On server, the vectors follow @@ -164,6 +165,11 @@ exception_marker: #include "exceptions-64s.S" #endif +/* KVM trampoline code needs to be close to the interrupt handlers */ + +#ifdef CONFIG_KVM_BOOK3S_64_HANDLER +#include "../kvm/book3s_64_rmhandlers.S" +#endif /* * On pSeries and most other platforms, secondary processors spin -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
[PATCH 16/23] Make head_64.S aware of KVM real mode code
We need to run some KVM trampoline code in real mode. Unfortunately, real mode only covers 8MB on Cell so we need to squeeze ourselves as low as possible. Also, we need to trap interrupts to get us back from guest state to host state without telling Linux about it. This patch adds interrupt traps and includes the KVM code that requires real mode in the real mode parts of Linux. Signed-off-by: Alexander Graf --- arch/powerpc/include/asm/exception.h |2 ++ arch/powerpc/kernel/exceptions-64s.S |8 arch/powerpc/kernel/head_64.S|6 ++ 3 files changed, 16 insertions(+), 0 deletions(-) diff --git a/arch/powerpc/include/asm/exception.h b/arch/powerpc/include/asm/exception.h index d3d4534..54dc66f 100644 --- a/arch/powerpc/include/asm/exception.h +++ b/arch/powerpc/include/asm/exception.h @@ -144,6 +144,7 @@ .globl label##_pSeries; \ label##_pSeries: \ HMT_MEDIUM; \ + DO_KVM n; \ mtspr SPRN_SPRG1,r13; /* save r13 */ \ EXCEPTION_PROLOG_PSERIES(PACA_EXGEN, label##_common) @@ -167,6 +168,7 @@ label##_pSeries:\ .globl label##_pSeries; \ label##_pSeries: \ HMT_MEDIUM; \ + DO_KVM n; \ mtspr SPRN_SPRG1,r13; /* save r13 */ \ mfspr r13,SPRN_SPRG3; /* get paca address into r13 */ \ std r9,PACA_EXGEN+EX_R9(r13); /* save r9, r10 */ \ diff --git a/arch/powerpc/kernel/exceptions-64s.S b/arch/powerpc/kernel/exceptions-64s.S index eb89811..d85f301 100644 --- a/arch/powerpc/kernel/exceptions-64s.S +++ b/arch/powerpc/kernel/exceptions-64s.S @@ -51,6 +51,7 @@ __start_interrupts: . = 0x200 _machine_check_pSeries: HMT_MEDIUM + DO_KVM 0x200 mtspr SPRN_SPRG1,r13 /* save r13 */ EXCEPTION_PROLOG_PSERIES(PACA_EXMC, machine_check_common) @@ -58,6 +59,7 @@ _machine_check_pSeries: .globl data_access_pSeries data_access_pSeries: HMT_MEDIUM + DO_KVM 0x300 mtspr SPRN_SPRG1,r13 BEGIN_FTR_SECTION mtspr SPRN_SPRG2,r12 @@ -77,6 +79,7 @@ END_FTR_SECTION_IFCLR(CPU_FTR_SLB) .globl data_access_slb_pSeries data_access_slb_pSeries: HMT_MEDIUM + DO_KVM 0x380 mtspr SPRN_SPRG1,r13 mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ std r3,PACA_EXSLB+EX_R3(r13) @@ -115,6 +118,7 @@ data_access_slb_pSeries: .globl instruction_access_slb_pSeries instruction_access_slb_pSeries: HMT_MEDIUM + DO_KVM 0x480 mtspr SPRN_SPRG1,r13 mfspr r13,SPRN_SPRG3 /* get paca address into r13 */ std r3,PACA_EXSLB+EX_R3(r13) @@ -154,6 +158,7 @@ instruction_access_slb_pSeries: .globl system_call_pSeries system_call_pSeries: HMT_MEDIUM + DO_KVM 0xc00 BEGIN_FTR_SECTION cmpdi r0,0x1ebe beq-1f @@ -186,12 +191,15 @@ END_FTR_SECTION_IFSET(CPU_FTR_REAL_LE) * trickery is thus necessary */ . = 0xf00 + DO_KVM 0xf00 b performance_monitor_pSeries . = 0xf20 + DO_KVM 0xf20 b altivec_unavailable_pSeries . = 0xf40 + DO_KVM 0xf40 b vsx_unavailable_pSeries #ifdef CONFIG_CBE_RAS diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S index 012505e..9675ab7 100644 --- a/arch/powerpc/kernel/head_64.S +++ b/arch/powerpc/kernel/head_64.S @@ -38,6 +38,7 @@ #include #include #include +#include /* The physical memory is layed out such that the secondary processor * spin code sits at 0x...0x00ff. On server, the vectors follow @@ -164,6 +165,11 @@ exception_marker: #include "exceptions-64s.S" #endif +/* KVM trampoline code needs to be close to the interrupt handlers */ + +#ifdef CONFIG_KVM_970_HANDLER +#include "../kvm/970_rmhandlers.S" +#endif /* * On pSeries and most other platforms, secondary processors spin -- 1.6.0.2 -- To unsubscribe from this list: send the line "unsubscribe kvm-ppc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
